WorldWideScience

Sample records for chosa ni yoru

  1. FY 1998 annual report on the decomposition/removal of harmful compounds in the gaseous phase by porous membrane provided with a catalytic function; 1998 nendo shokubai kinotsuki fuyo takomaku ni yoru kisochu yugai busshitsu no bunkai jokyo chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    Harmful compounds, e.g., dioxins and nitrogen oxides, released into the air are causing severer environmental problems on a global scale. In order to solve these problems, it is necessary to efficiently remove the released compounds in the vicinity of the living environments, while preventing, as far as possible, their formation at the sources. An attempt has been made to develop porous membranes impregnated with composites of a variety of metallic oxides showing activities as photocatalysts and for dark reactions by the ion engineering method, in order to drastically solve the above problems. Described herein are the FY 1998 results. Thin films of various titanium oxide crystals (anatase, rutile, and their combinations) are formed on Si substrates by the ion engineering method, as the photocatalysts for decomposition of aldehyde and water (for hydrogen production), to validate the optimum crystalline structures for the photocatalysis. Porous bodies of Ni and carbon are also impregnated with anatase TiO{sub 2} for decomposition of harmful gaseous compounds and water, to validate the effects of the porous membranes provided with catalytic functions. (NEDO)

  2. Faults survey by 3D reflection seismics; Sanjigen hanshaho jishin tansa ni yoru danso chosa

    Energy Technology Data Exchange (ETDEWEB)

    Tsuchiya, T; Ejiri, T; Yamada, N; Narita, N; Aso, H; Takano, H; Matsumura, M [Dia Consultants Company, Tokyo (Japan)

    1996-10-01

    This paper describes fault survey by 3D seismic reflection exploration. Survey has been conducted mainly at flat land area without pavement not in urban area in Japan. Subsurface structure is complicated with intersecting multiple faults. In this area, a lot of geological investigations have been done prior to the seismic reflection exploration. Fairly certain images of faults have been obtained. However, there were still unknown structures. Survey was conducted at an area of 170m{times}280m in the CDP range. Measurements were carried out by using 100 g of dynamite per seismic generation point combined with 40 Hz velocity geophones. Fixed distribution consisting of lattice points of 12{times}12 was adopted as an observation method. In and around the lattice, a great number of explosions were carried out. The CDP stacking method and the method of migration after stacking were used for the data processing. The 3D structures of six horizons and five faults could be interpreted. Interpreted horizons were well agreed with the logging results. 3 figs.

  3. Ground water contamination by electrical prospecting; Denki tansaho ni yoru chikasui osen chosa

    Energy Technology Data Exchange (ETDEWEB)

    Irie, S; Fujii, Y; Sakaguchi, S; Ushijima, K [Kyushu University, Fukuoka (Japan). Faculty of Engineering

    1996-05-01

    A report is made about the result of vertical electric sounding conducted in the MK district, Fukuoka City, where Kyushu University is about to move. As for the method of electrical prospecting, in consideration of the need for probing a depth of 50m at the shallowest, vertical electrical sounding with a Schlumberger array of electrodes was employed. Measurements were made for 57 locations on the planar ground, the interval between electrodes gradually increased from 1 to 200m. In the 2D structure model analysis, a 2D inversion program was utilized in the ABIC minimization method. Also investigated were the relationship of electric prospecting and the geology, geological conditions, water level in the well, water quality, salt water, and pore rate from the previously-conducted investigative boring. As the result, it was estimated that the boundary between the first and second layers detected by electric prospecting reflected the level of underground water and that the boundary between the second and third layers reflected the portion where the N-value sharply increases. 4 refs., 8 figs.

  4. Research on environmental bioecosensing technology using ecological information; Seitaikei joho ni yoru kankyo bio eco sensing gijutsu ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    The bioecosensing technology was studied which detects and identifies feeble signals generated by biosystem communication in wide biological environment. The following were reported as current notable environmental biosensing technologies: a quick measurement method of environmental contaminants using immunological measurement method, analysis method of ecological state of microorganism using DNA probes, observation of ecosystem by bioluminescent system, measurement method of environmental changes and contaminants using higher animals and plants, and detection method of chemical contaminants using chemotaxis of microorganism. As a result, the new bioecosensing/monitoring technology in molecular level was suggested for identifying comprehensive environmental changes which could not be measured by previous physical and chemical methods, as changes in ecosystem corresponding to environmental changes. As the wide area remote sensing technology of environmental ecological information, sensing technology on the earth, aircraft and satellite was also discussed. 247 refs., 55 figs., 17 tabs.

  5. Hydrogenation of heteroaromatics by high pressure DTA techniques. 3; Koatsu DTA ho ni yoru hokozoku kagobutsu no suisoka (rutenium tanji shokubai ni yoru kakusuisoka datsu hetero hanno)

    Energy Technology Data Exchange (ETDEWEB)

    Yamamoto, M.; Yoshida, T. [Hokkaido National Industrial Research Institute, Sapporo (Japan); Kotanigawa, T. [Japan International Cooperation Agency, Tokyo (Japan)

    1996-10-28

    Ring-opening of heteroaromatics and heteroatom-removal reaction were studied experimentally using the acidic catalyst containing phosphoric acid for improvement of an upgrading method of coal derived oils. In experiment, some Ru-carrying metal oxide catalysts such as RMZ, RML and RMN catalyst, and MNP catalyst containing phosphoric acid were used as specimens. Nuclear hydrogenation reaction and hydro-denitrogenation reaction of dibenzothiophene and carbazole were compared with each other. The experimental results are as follows. Both RMN and RMNP catalysts offer a superior selectivity in nuclear hydrogenation reaction and hydro-denitrogenation reaction of carbazole. Although both catalysts offer an extremely high nuclear hydrogenation activity at 360{degree}C, these offer the high selectivity of denitrogenation products at 430{degree}C. In comparison of the activities of MN and MNP catalysts with the same Mn2O3:NiO ratio, MNP catalyst offers the higher denitrogenation activity than MN catalyst at 430{degree}C. 1 ref., 3 tabs.

  6. Investigation on the chemically fixing technique of carbon dioxide utilizing solar energy; Taiyo energy riyo ni yoru nisanka tanso no kagakuteki koteika gijutsu ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    1993-03-01

    This report describes the results of effective fixing technique of CO2 by utilizing solar energy. First of all, the investigation was directed to the technique for synthesizing ethylene, hydrocarbons and alcohol by electrochemical reduction of CO2. The power required for this process is supplied by photovoltaic power generation. Development of excellent electrode catalyst is needed because the reduction of CO2 requires a high overvoltage. It is desirable to enhance the selectivity of the reaction for specific material and improve the transport process in the electrolytic cell. Next, designing of material and reaction of photocatalysts using semiconductor electrode and semiconductor particulate was examined. A semiconductor electrode made of FeS2 is inexpensive and has a high ability of collecting solar light. In the category of photocatalysis system, a photocatalytic system in which semiconductor particles are embedded in vesicle and a photpocatalyst based on potassium niobate are noteworthy. As biosystem, the method of reducing CO2 by calcareous algae which simultaneously advances fixing and calcification of CO2 by photosynthesis is noteworthy. 129 refs., 45 figs., 20 tabs.

  7. MT survey in the Minaminoshiro oil field; Minaminoshiro chiiki ni okeru MT ho ni yoru sekiyu tanko (sanjigen MT ho chosa no kento). 1

    Energy Technology Data Exchange (ETDEWEB)

    Matsuo, K; Minegishi, M [Japan National Oil Corp., Tokyo (Japan). Technology Research Center

    1997-10-22

    Preliminary experiment, investigation, and study are conducted prior to an experimental 3-D MT (magnetotelluric) survey planned to be carried out in the Minaminoshiro district, Akita Prefecture. In the preliminary investigation, MT measurements were performed at nine locations. It was anticipated that national highways, waste treatment plants, high-voltage power lines, and railways in presence in the district would act as noise sources. Although the impact of such noise was detected in the single site treatment result, yet it was found that it would be mostly eliminated by use of the remote reference treatment. It was learned that the resistivity structure in this district was quite low in contrast or 1 ohm/m against 30 ohm/m, but the result of 3-D model calculation indicated that a sufficient analysis would be possible even in such a low contrast case. Furthermore, as the result of the study of the density of observation stations in the magnetic field, it was found that changes in the response of magnetic field to the resistivity structure would be approximately 2% at the maximum and that the ill effect on the result of measurement would be of the negligible magnitude even when a single magnetic field observation station is deployed against plural electric field observation stations. 6 refs., 7 figs.

  8. Global environmental benefits of industrial heat pumps (fiscal 1993); 1993 nendo koon heat pumping gijutsu ni yoru chikyu ondanka keigen koka ni kansuru chosa kenkyu hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1994-03-01

    An investigational study was conducted aiming at making a quantitative grasp of effects of the spread of industrial heat pumps on energy conservation and greenhouse gas reduction and at promoting the spread. Finally, the following eight countries joined this international joint research: Canada, France, Japan, Holland, Norway, Sweden, the U.K. and the U.S. Each country share the work and expenses for the research with each other. Japan made investigational researches on the application of heat pumps to processes of the chemical industry, oil refining industry, food industry, paper/pulp industry, and dyeing/weaving industry, and on the effects of greenhouse gas reduction. As procedures taken, values up to 2010 were estimated of energy prices in each country, energy supply/demand, rates of the heat source configuration for electric power supply, etc., the heat flow of the above-mentioned process was made clear, and analyses were conducted of annual profits, energy consumption, and depreciation period in the case of adopting heat pumps. Moreover, the energy conservation amount and greenhouse effect gas reduction amount were estimated based on the result of the analyses. 69 figs., 196 tabs.

  9. Research of environmental bioecosensing technology using ecological information. Part 2; Seitaikei joho ni yoru kankyo bio ecosencing gijutsu ni kansuru chosa. 2

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    Basic considerations of exploring and cultivating environmental reporter organisms are summarized. Mechanism of genetic engineering amplification and molecular biological amplification, and approach to combining them to a hardware as a bioindicator system are investigated. For the current status of molecular biological measurement technology for measuring ecological environment and its application, environmental diagnosis from a phyropathological viewpoint, environmental diagnosis using microorganisms, test fabrication of genetic sensor, and overseas examples of environmental monitoring network are described. For the application of ecological information and functions for developing innovative environmental remediation technology, issues and potential areas for research and development regarding the bioremediation technology in which the US has achieved a progress for the benefit of soil environment remediation are summarized. For the phytoremediation, an area of bioremediation, the metabolism of microorganisms which live in the rhizosphere, and the technology for controlling the microorganisms in the soil through plants are investigated. 66 refs., 50 figs., 17 tabs.

  10. Report for fiscal 2000 investigations on effects imposed by introducing emission trading system; 2000 nendo haishutsuryo torihiki system donyu ni yoru eikyo ni kansuru chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    With regard to effectiveness of the emission trading targeted to reduce the greenhouse effect gas emission, evaluation has been given from the three viewpoints: economies, environment, and household economy. In the research, simulations were implemented by using the GEC calculation model modified for introduction of domestic emission trading, and utilization of international emission trading. In evaluating the effects on industries and foreign trades, notice was given on the large energy consuming industries to discuss the effects of introducing the emission trading on the quantity of production and export. Regarding the effects on environment, calculations and discussions were given on greenhouse effect gas leakage rates to assess the greenhouse effect gas emission reducing effects from the domestic and international viewpoints. As a result of the discussions, it was found that the economies, environment and household economy are all benefited in regard with the domestic emission trading. Utilization of the international emission trading was also found to have sufficient positive benefit exist for the economies and household economy. (NEDO)

  11. Investigation on innovation of technology development by means of strategic energy intelligence; Energy senryakurontekina approach ni yoru gijutsu kaihatsu no kakushin ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    For the purpose of developing the future innovative energy technology, the paper described a strategic point of view. Effects of the energy issue are remarkable on the next generation and thereafter as seen in the finite of energy resource, global-scale environmental changes, the increasing energy demand, natural/social influences of large-scale technology development. If the technological development is going on in the same way as until now, there will appear limits. Relating to the strategies, to seek what energy should be among the strategies, it is necessary to consider not only global-scale problems but particular conditions in Japan (self-sufficiency, international cooperation, creativity, etc.) Also, wisdom and technique are necessary to attain it. Technological development in a wide sense plays a major role in the energy strategy. Technology innovation must be advanced according to the energy strategy. Integrating ideology into the development of energy technology and selecting therefrom developmental subjects which meet the purpose, required is the construction of the energy system with high flexibility and functionality. Looking at the conventional way of thinking from a different angle and posing a future pull plan, Japan should show leadership to the world. 20 refs., 25 figs., 8 tabs.

  12. Results of geophysical survey on Hanaore-fault in the Kyoto urban area; Butsuri tansa ni yoru Kyoto shigaichi ni okeru Hanaore danso chosa

    Energy Technology Data Exchange (ETDEWEB)

    Yoshioka, T. [Geological Survey of Japan, Tsukuba (Japan); Echigo, T. [Osaka Soil Test, Osaka (Japan); Toshioka, T.; Matsubara, Y. [Oyo Corp., Tokyo (Japan)

    1997-05-27

    This paper reports results of gravity survey and seismic survey using the shallow bed reflection method to identify distribution of the Hanaore fault in the Kyoto urban area. In the gravity survey, level differential structure caused by the fault was identified as an abrupt change in Bouger anomalous values. The continuity therefrom made the estimation possible on existence and positions of such faults as the Hanaore fault belonging to the Hanaore fault system, the Shishigaya fault, the Kaguraoka fault, and the Okazaki fault. The estimation as a result of the gravity survey include the following findings: the Hanaore fault runs from south of the Yoshidayama in the south-north direction; the distribution of the Okazaki fault has a level differential structure falling on the east side; the structure shows low Bouger anomaly distribution; and this area forms a rift valley belt. In the seismic survey using the shallow bed reflection method, no distinct reflection plane considered as the basement was verified because of influence from urban area noise. However, it was possible to estimate such an underground structure as a monoclinal fold from shapes of the reflection plane and the distribution depths. 7 refs., 5 figs.

  13. Researches regarding a constructing problem of a PV system. Part 1. Conscious investigation by means of a questionnaire survey; Taiyoko hatsuden system ni okeru kenchikuteki shomondai no kenkyu. 1. Anketo chosa ni yoru ishiki chosa

    Energy Technology Data Exchange (ETDEWEB)

    Nakajima, Y; Yamazaki, R; Kuroki, T [Kogakuin University, Tokyo (Japan)

    1996-10-27

    The installation and introduction of photovoltaic power generation systems (PVS) in buildings are growingly expected in the construction field from now, coupled with the marketing of a solar cell module as a product for a construction material in the form of an external wall or a roof material for example. For this purpose, it is necessary at first to summarize problems that may arise at the time of or after the installation of PVS as a product. This paper examines an opinion poll, degree of recognition, current problems, etc., of PVS as a result of a questionnaire survey given to engineers and architects engaged in the actual construction business. The degree of recognition and interest was very high. Consultation or request for PVS installation was much more than predicted in numbers. Roughly 50% of the respondents reacted positively for the future installation request of PVS and, combined with the respondents who answered to look into the installation tentatively, not less than 90% were of a forward-looking opinion. The 85% of the respondents was not aware of the monitor business system for residential PVS. Further, the survey clearly brought out the importance of cost problems. 1 ref., 11 figs., 3 tabs.

  14. Research report for fiscal 1998. Survey on the researchers and research institutes for the effects of global warming and its countermeasures; 1998 nendo onshitsu koka gas ni yoru kankyo eikyo nado ni kansuru kenkyusha kenkyu kikan chosa chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    Researchers and research institutes across the world (except those in Japan), engaged in the study of global warming and measures to deal with the phenomenon, are extracted in compliance with certain specified standards, and the latest information on them is appropriately arranged and listed. It is further developed into an electronic database for the convenience of users. The collected information includes more than 230 research institutes and more than 1,000 researchers. The endeavor is exerted by extracting essays and institutes mainly out of the on-line databases. More than 1,000 essays and 130 institutes are covered. Visits are made to five institutes in the U.S. and four in Europe who are most actively engaged in the study of global warming, and detailed researches are conducted and information is exchanged. The Argonne National Institute copes with all energy problems related to global warming. Descriptions are given about environmental impact surveys and CO2 isolation in the ocean at the Center for Global Science of the Massachusetts Institute of Technology. At the Oak Ridge National Laboratory, the visitors heard explanations of technologies related to renewable energies and so forth. Researches are made into ecosystems at the University of California, and into natural energies at the University of Hawaii. Also visited are research institutes in Australia, Germany, Netherlands, and Britain. (NEDO)

  15. Fiscal 1997 survey report on the project on energy conservation by effectively using building energy in Indonesia; 1997 nendo chosa hokokusho (Indonesia ni okeru biru energy yuko riyo ni yoru sho energy ka project chosa)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    As an energy conservation method for a model building, the following eight methods were selected and trially calculated of the effects. 1) adoption of high efficient illumination apparatus, 2) introduction of an illuminance control system, 3) cooling water secondary pump with invertor, 4) ventilation control for parking lots, 5) heightening of the established temperature, 6) improvement of the 24-hour run chiller, 7) elevator with invertor, and 8) introduction of the photovoltaic power generation. As a result, it was found out that energy was totally reduced by about 3,837.4 MWh/yr or 25.6%. If viewed from the amount of reduction in greenhouse gas, the amount of CO2 emitted from office buildings, approximately 0.22 million t-C/yr, decreases to approximately 0.16 million t-C/yr. Further, approximately 0.93 million t-C/yr, the amount of CO2 emitted from commercial use facilities such as office buildings, department stores and hotels is reduced to about 0.69 million t-C/yr, thanks to the effect of the project on energy saving buildings, which made a CO2 reduction by approximately 0.24 million t-C/yr possible. Validity of the project on energy conservation in Indonesia was confirmed. 2 refs., 55 figs., 38 tabs.

  16. Outline of investigation on restraint of carbon dioxide generation by green chemistry. 1999.1-1999.3; 1998 nendo green chemistry ni yoru CO2 hassei yokusei ni kakawaru chosa kenkyu chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    Investigations were conducted into the above in some leading OECD (Organization for Economic Cooperation and Development) member states. Green chemistry is a new concept in which clean technology, environment-friendly chemistry, and the like are combined, and is a chemical solution for reducing or stopping the use or generation of materials, products, by-products, solvents, reagents, etc., which are dangerous to health and environments, throughout the whole life cycle of chemicals covering the processes of their designing, manufacturing, dumping, and recycling. In this fiscal year, the actual state of the generation of biomass, regarded as representative of reproducible materials, and its feasibility as chemical resources were investigated. In an effort at finding out chemical reactions safer to health and causing less environmental impact, investigations were also conducted into the recent trends of catalysts, novel reactions for organic syntheses, use of supercritical fluids, photocatalysts, biomimetic processes, etc. The development of substitutes for plastic additives was also studied. Since acceptance by the citizenry is quite important for green chemistry to take effect, educating and enlightening activities in the U.S., Britain, France, and Germany were inquired into. (NEDO)

  17. Study of highly efficient power generation system based on chemical-looping combustion; Chemical loop nenshoho ni yoru kokoritsu hatsuden system no kaihatsu ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Ishida, S; Suzuki, T; Yamamoto, M [Tokyo Institute of Technology, Tokyo (Japan). Research Laboratory of Resources Utilization

    1997-02-01

    This paper describes the research and development of power generation system by means of chemical-looping combustion. For this system, fuel flows in a reduction reactor and air flows in an oxidation reactor. These two flows are separated. As a result, recovery of CO2 without energy consumption, drastic improvement of power generation efficiency, and suppression of NOx emission are expected. To realize the above, two promising candidates, NiCoO2/YSZ and NiO2/NiAl2O4, have been found as recycle solid particles between the both reactors. These have excellent oxidation/reduction cycle characteristics. By these particles as well as the existing particle, NiO/YSZ, practical application of the chemical-looping combustion is realized. Besides LNG, coal and hydrogen were considered as fuels. When using coal or hydrogen, it was found that temperature of the reduction reactor should be increased the same as that of the oxidation reactor. This is a different point from a case using LNG as a fuel. 5 refs., 2 figs.

  18. Development of the electromagnetic tomography system. Sensitivity study of anomalous body by model studies; EM tomography system no kaihatsu. Model kaiseki ni yoru ijotai no kando chosa kekka

    Energy Technology Data Exchange (ETDEWEB)

    Kumekawa, Y; Miura, Y; Takasugi, S [Geothermal Energy Research and Development Co. Ltd., Tokyo (Japan); Arai, E [Metal Mining Agency of Japan, Tokyo (Japan)

    1996-05-01

    An examination was made by a model analysis on sensitivity and the like against a resistive anomalous body, in connection with an electromagnetic tomography system with surface earthquake sources and underground receiver arrangements. A resistivity model was of a three-dimensional structure, and built with a 5 ohm{center_dot}m low resistivity anomalous body assembled in a 100 ohm{center_dot}m homogeneous medium. As a result of the examination, it was shown that the size limitation of an analyzable anomalous body was 50{times}50{times}20m at a frequency of 8 to 10kHz and that a system with high precision in a high frequency range was necessary. The examination of effects under a shallow anomalous body revealed, for example, that the fluctuation of a low frequency response was large compared with a deep anomalous body and that, where a second anomalous body existed under it, the effect also appeared with a surface earthquake source positioned in the opposite side from the anomalous body. The examination of effects under the three dimensional structure revealed, for example, that a remarkable change appeared in the data with the change in the inclined angle of the transmission line against the strike of the anomalous body. 4 refs., 7 figs.

  19. Investigation on flow pattern by submersible mechanical aerator aused in anaerobic-aerobic tank. Kenki koki ken'yo suichu aerator ni yoru sonai ryudo no chosa kensho

    Energy Technology Data Exchange (ETDEWEB)

    Ogasawara, M; Inoue, H; Kamei, T; Kato, N [Ebara Corp., Tokyo (Japan)

    1994-01-20

    As explained in the present report, flow pattern was verified in a submersible aerator tank for both anaerobic and aerobic wastewater treatment (submersible plant for the mechanical agitation and aeration). The verification was made in a water passage of the sewage treatment plant. The flowing was conditioned as per the measurement of both flow velocity and activated sludge concentration. The submersible aerator was installed so that balance might be kept in ventilating pressure between it and the diffusing plate. The flowing on the tank bottom was stabilized by installing a special guide at the outlet of aerator. The result was as follows: in both tanks during the anaerobic operation, the flow velocity was 0.15m/s as a whole and higher than the standard of 0.1m/s on the tank bottom. Under the tank top and at the middle of tank height, the flow velocity is lower than that on the tank bottom and the intake of dissolved oxygen is weak. In both tanks during the aerobic operation, the flow velocity as a whole is higher than that during the anaerobic operation. It is attributable to the airlift effect. The flow pattern during the aerobic operation is characterized by the flow which is generated, by airlift effect, under the tank top toward the wall. Then, that flow effectively works for the flowing on the tank bottom. Hardly dispersed, the pollutant concentration indicates that the flowing is sufficient in the tank. 4 refs., 6 figs., 3 tabs.

  20. Investigation of the simulation for the solar DHW system by TRNSYS; TRNSYS ni yoru kaihogata tank wo mochiita solar kyuto system no simulation chosa

    Energy Technology Data Exchange (ETDEWEB)

    Oishi, M; Noguchi, T [Japan Quality Assurance Organization, Tokyo (Japan); Okumiya, M [Nagoya University, Nagoya (Japan)

    1997-11-25

    With an objective of establishing a method for evaluating performance of a photovoltaic hot water supply system, a discussion was given on utilization of the simulation program, TRANSYS. The discussion was addressed on a photovoltaic hot water supply system of forcible circulation type using commercially available open-type heat storage tanks. An experiment was performed as an indoor test using an artificial solar light source. The TRANSYS makes available a type 04 which handles each node as a complete mixture by fixing and dividing the heat storage tank, and a type 38 which expresses heat transfer between temperature layers by means of piston flow as a heat transfer coefficient. Both types were subjected to calculation. The result of the discussion may be summarized as follows: both types provided values close to the experimental values of quantity of heat derived by utilizing solar heat; however, with the type 04, heat transfer cannot be modeled if the system is left still with temperature difference in the heat storage tank being large; and with the type 38, modeling is possible when the system is left still with temperature difference in the heat storage tank being large, but temperature gradient is difficult to be modeled during heat collection and when hot water is supplied. 1 ref., 7 figs., 5 tabs.

  1. Fracture inspection by BHTV logging through a vinyl chloride tube; Enbi pipe ga sonyusareta kosei deno BHTV ni yoru kiretsu chosa

    Energy Technology Data Exchange (ETDEWEB)

    Horikawa, H.; Okabe, T.; Takasugi, S. [GERD Geothermal Energy Research and Development Co. Ltd., Tokyo (Japan); Yamauchi, Y.; Imanishi, H. [Osaka Soil Test, Osaka (Japan)

    1997-05-27

    A borehole televiewer (BHTV) logging was conducted to investigate cracks in bored wells. The logging process shoots ultrasonic waves onto bore walls and utilizes reflection waves from the bore walls. If the bores are filled with muddy water, or the ultrasonic waves can pass through even if vinyl chloride tubes have been inserted after excavation, the state of the bore walls can be investigated in principle. Conventional optical scanners are, however, incapable of making this investigation. The BHTV logging can be used for identifying lithofacies from reflection intensities from bore walls (it depends on sound impedance of rocks), not to speak of finding cracks. As a result of making logging upon setting time windows from 105 to 145 {mu} sec in a bored well inserted with a vinyl chloride tube, cracks in the bore wall were identified clearly through the vinyl chloride tube. If the distance between the bore wall and the vinyl chloride tube becomes smaller, setting the time window becomes difficult, making reflection data acquisition more difficult. Impacts of decentering in the vinyl chloride tube on the data and the crack analysis result are small. The reflection intensity has decreased by about half as a result of having the circular vinyl chloride tube inserted. 5 refs., 9 figs., 1 tab.

  2. System approach on solar hydrogen generation and the gas utilization; Taiyo energy ni yoru suiso no seisei oyobi sono riyo system ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Fujii, I; Hirooka, N; Deguchi, Y; Narita, D [Meiji University, Tokyo (Japan)

    1997-11-25

    An apparatus is developed to establish a system which allows utilization of hydrogen safely and easily, and its applicability to a hydrogen system for domestic purposes is tested. The system converts solar energy by the photovoltaic cell unit into power, which is used to generate hydrogen by electrolysis of water at the hydrogen generator, stores hydrogen in a metal hydride , and sends stored hydrogen to the burner and fuel cell units. It is found that a hydrogen occluding alloy of LaNi4.8Al0.2 stores hydrogen to approximately 80% when cooled to 20 to 25degC, and releases it to 10% when heated to 40degC. The fuel cell uses a solid polymer as the electrolyte. The hydrogen gas burner is a catalytic combustion burner with a Pt catalyst carried by expanded Ni-Al alloy. The optimum distance between the burner and object to be heated is 22mm. High safety and fabrication simplicity are confirmed for use for domestic purposes. The system characteristics will be further investigated. 4 refs., 8 figs.

  3. Report on technological survey in fiscal 1999. Demonstration test for smoothing grid interconnection (Collection of information by surveys in overseas countries); 1999 nendo keito renkei enkatsuka jissho shiken chosa hokokusho. Kaigai chosa ni yoru joho shushu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    Surveys were performed on the institutional aspects of establishment and operation of grid interconnection guidelines in the countries advanced in introduction of discrete power supply systems. The survey items for America include: (1) summary of the status related to grid interconnection, (2) grid interconnection process, (3) methods for paying expenses for increasing power transmission facilities by means of grid interconnection, (4) dispute processing, (5) information release, and (6) software. The survey items for England, Germany, and France include: (1) summary of electricity business, (2) regulation patterns in electricity business, (3) summary of grid operating organizations, (4) connection to grid interconnection systems, and (5) the future liberalization programs. America is establishing standards for grid interconnection in discrete power supplies including photovoltaic power generation and energy storage under SCC21 of IEEE, whose conclusion will be drawn in the end of 2000. The Energy Department has an intention to give the standards the legal bases to operate them under unified requirements. Germany, England and France have all established standards for operating the grid interconnection. Market liberalization for electric power retailing is advancing in the order of America, England, Germany, and France. (NEDO)

  4. Report on technological survey in fiscal 1998. Demonstration test for smoothing grid interconnection (Collection of information by surveys in overseas countries); 1998 nendo keito renkei enkatsuka jissho shiken chosa hokokusho. Kaigai chosa ni yoru joho shushu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    Surveys were performed on the institutional aspects of establishment and operation of grid interconnection guidelines in the countries advanced in introduction of discrete power supply systems, namely, England, Ireland, Italy and the United States, as well as on the simulation technologies to realize them technically. In England, the power transmission systems (controller: NGO) and the power distribution systems (controller: PES) are separated, to which grid interconnection operating regulations are provided respectively. Single operation of generators connected to the power distribution system is not permitted substantially. In Ireland, the power transmission and distribution functions are separated, but are in the transition stage. Interconnection, if requested, cannot be rejected except for a case that the interconnection is impossible. Italy has the condition similar to that in Ireland, where no small generators are not permitted of independent operation. America has not unified the operating regulations for grid interconnection, and has apprehension in the independent operation, but no countermeasures have been given. In the simulation technologies, surveys were made on PSS/E, EUROSTAG, and SICRE. The PSS/E is the standard software in America for the current and stability analysis. (NEDO)

  5. Trend survey of the global environment adaptation type industrial technology. Chikyu kankyo tekiogata sangyo gijutsu doko chosa. ; Chikyu kankyo kanren kenkyu doko no chosa (nisanka tanso no kankyo fuka teigensaku ni kansuru chosa kenkyu)

    Energy Technology Data Exchange (ETDEWEB)

    1992-03-01

    The paper studies the measures for reduction of environmental load of CO2 from the standpoint of chemical technology. As for methanol synthesis from CO2, accelerating of the reaction using Cu base compound catalyst is reported. Also, CO2 is methanated at high speed by low temperature waste heat using Ni-La2O3-Ru catalyst. Discussions are given on the subject for development of catalyst reaction relating to hydrogen production technology by methane reforming reaction using steam or CO2. Synthesis of polymetric materials by use of CO2 is also described. The paper mentions that it is indispensable to design high-function electrode and elucidate the reaction mechanism of electrochemical CO2 reduction for electrochemical and photochemical CO2 reduction measures. Moreover, in case of using solar energy, it is required to study photovoltaic excitation process in semiconductor electrode/ electrolyte solution interface. For production of hydrogen from CO2 by photosynthetic organisms and solar energy, the problem is control of inhibiting effect of oxygen combinedly produced. Described are production of polyhydroxy butyric acid and biodegradable polymer from CO2 and hydrogen by bacteria, and CO2 fixation imitating the enzyme reaction. 267 refs., 79 figs., 32 tabs.

  6. Effects of air pollution on the health of regional inhabitants. Part I. Survey of disease state by Enquete. Taiki osen ga chiiki jumin no kenko ni oyobosu eikyo ni tsuite-dai ippo; anketo ni yoru shojo chosa

    Energy Technology Data Exchange (ETDEWEB)

    1973-01-01

    From May to July 1972, the disease states of 2096 inhabitants (710 men and 1386 women) in the Fukushima Ward of Osaka City, where the concentration of sulfur trioxide in the air was (yearly average) 1.81 mg/day/100 sq cm and that of carbon monoxide was 5.3 ppM, and that of nitrogen dioxide was 5.3 ppM, were surveyed. The number of persons surveyed was 2.9% of all the inhabitants of the Ward. Twenty-two point one percent were in their thirties, 20.1% in their forties, 16.5% in their sixties, and 15.3% in their fifties. Those who experienced chest diseases were 2.9% of the total, and those with heart diseases were 1.5%. Non-smoking men were 31.7% of the total. The percentage of long-term complaints of cough and sputum was 11.8% in the eastern section, 11.2% in the northern section, 10.0% in the southern section, 6.8% in the western section of the Ward. The frequency of complaints was highest in the sixties (12.7%), followed by 11.5% in the fifties, 11.3% in the thirties, and 8.6% in the forties. The frequency of complaints from men was 11.1% and that from women was 6%. The frequency of complaints was 19.8% in smokers, 8.5% in those who smoked less, and 6.8% in non-smokers. The frequency of complaints classified by residential area showed 12.6% in industrial areas, and 7.8% in residential and commercial areas. The frequency of complaints of inhabitants who live along National Road No. 2 was relatively high, ranging from 15.0 to 18.8%, and the frequency of complaints of inhabitants was apparently higher than those of people who only work in the Ward.

  7. FY1998 research report on the basic research on geothermal district heating in Kamchatka, Russia; 1998 nendo Roshia Renpo Kamchatka shu ni okeru chinetsu riyo ni yoru chiiki danbo ni kansuru kiso chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-05-01

    Petropavlovsk-Kamchatky (P-K) city in Kamchatka, Russia is operating hot-water district heating using heavy oil boilers and waste hot water of thermal power plants as heat sources. Feasibility study was made on district heating using natural geothermal hot water and/or geothermal heat pump systems as heat sources of hot water supply for reduction of greenhouse effect gas emission. Among 3 areas including geothermal hot water, use of hot water in K area was impossible because of lower temperature and less spring water. Use of hot water in P and UP areas was impossible as primary hot water because of temperature drop to 64 degrees C during hot water supply toward P-K city. The building heating operation test was carried out using the geothermal heat pump system installed in a newly drilled heat exchange well of 100m deep. As a result, sufficient heat recovery was achieved for heating. If all of 49 boiler houses for heating are replaced with such geothermal heat pump systems, CO{sub 2} reduction was estimated to be 520,000t/y. (NEDO)

  8. Investigation into introduction and promotion of clean energy cars; Clean energy jidosha no donyu sokushin ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    Gazing the introduction target for fiscal 2000 and 2010, the paper arranged comprehensively and systematically the trend in Japan and overseas of clean energy cars and described subjects. Themes of the study to be promoted in terms of electric cars are: Li secondary batteries, heightening of performance of batteries such as Ni-hydrogen, power generation/power storage hybridization to make the long-distance travel possible. For the price reduction, the body is so made as to make it possible to select three kinds of power unit, that is, gasoline, hybrid, and electricity. Low noise and easy operation are also important. As to natural gas vehicles, the price is more than three times as high as that of gasoline vehicles, and relaxation of the related regulations on metal tanks, the Road Traffic Act, etc. is necessary. It is indispensable to establish quantity production and technical standards and reduce cost by the remodeling for bi-fueling with gasoline engines, development of FRP tanks, etc. Methanol vehicles are the closest to gasoline vehicles, but the introduction is delayed having no groups for generalization. Solar and hydrogen cars are promising, but are on a stage of developing the basic technology. 43 figs., 104 tabs.

  9. Research report of fiscal 1997. Research on the projects on Activities Implemented Jointly Japan Program (feasibility research on energy saving by improving heat management for hot blast stoves and heating furnaces); 1997 nendo chosa hokokusho. `Kyodo jisshi katsudo Japan Program` ni kakawaru project chosa (neppuro, kanetsuro no netsukanri kaizen ni yoru sho energy kanosei chosa)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    Research was made on joint implementation (JI) for preventing global climate changes in China. Since such the stove and furnace consume a large amount of energy, their improvement and energy saving are important for integrated iron plants. Maanshan iron plant was selected for the research. All the furnaces were manually operated without combustion control systems, and oxygen meters for exhaust gas frequently troubled. As measures for the stoves, operation at a proper air fuel ratio, improvement of over heat storage combustion, and dust cleaning for waste heat recovery gas heaters were proposed. For the furnaces, a proper oxygen content at the end of furnaces (reduction of invasion air) was proposed to improve exhaust gas loss up to that in Japan. For this target, reinforced instrument management and standardized combustion control are essential. JI of software improvement for operation and management can reduce annual greenhouse effect gas emission to 45,900t and 6,300t in carbon equivalent for the stove and furnace, respectively. CO2 reduction is also estimated to be 1,173,000t and 205,000t in China of 107,570,000t in raw steel production, respectively. 28 figs., 32 tabs.

  10. Fiscal 1999 survey report. Part 2. Research study on restraint of carbon dioxide generation by green chemistry; 1999 nendo green chemistry ni yoru CO{sub 2} hassei yokusei ni kakawaru chosa kenkyu. 2

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    In connection with green chemistry, a concept of bringing paradigm shift to chemical technologies as something that makes reduction in environmental load compatible with economic activities; surveys were made this year on the developments of fine chemicals from renewable resources such as cellulose among the cases of developing chemical substances/products to be called 'green chemicals' reducing environmental load; developments of surfactants produced by certain microorganism, plastic additives with reduced pollutant loads, particularly fire retardants and environmentally benign reactant solvents; concept of green chemistry in the development of chlorofluorocarbon-alternatives; and up-to-date technological level concerning a design method of chemical materials and an estimation method for chemical safety using quantum chemistry calculation. In regard to the chemical materials and products intrinsically containing a certain level of risk, R and D should be reinforced and accelerated in the future on the alternative materials/products reducing their toxicity. In this case, along with the importance of discussing compatibility of technological possibility with economical adaptability, sociological study seems to be necessary in incorporating environmental load reduction into economic evaluation. (NEDO)

  11. Report on the FY 1999 investigational survey on the activation of oxygen electrode by ion implantation; 1999 nendo ion chunyuho ni yoru sanso denkyoku no kasseika ni kansuru kenkyu chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    The oxygen electrode is important as the base electrode for water electrolysis and fuel cell, but to move it, overvoltage (activated energy) in addition to equilibrium voltage is necessary, which leads to the lowering of energy efficiency. By forming the active spot by ion implantation, the lowering of overvoltage was studied. The implantation of Ru{sup +} ion in Ruthenium dioxide thin film electrode reduced the oxygen generating overvoltage by 15-20mV. Even in the oxygen reduction, activity was also increased. The chemical composition of thin film does not change by ion implantation. The increase in activity is based on a physical change which is called the surface defect formation. The layer of ion implantation is composed of microcrystals, which is thought to contribute to the formation of any active spot. Ions were implanted in Pt electrode as a practical use material, and even in the oxygen reduction of Pt, a possibility of heightening activity by ion implantation was admitted even in the oxygen reduction of Pt. The generation of high activity oxygen by ion plantation and development of oxygen reduction electrode were established as one method as a rule. (NEDO)

  12. Feasibility study of energy conservation measures to be taken in international cooperation in the metal mining industry; 1998 nendo kinzoku kokogyo ni okeru kokusai kyoryoku ni yoru sho energy taisaku jisshi no kanosei chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    In the investigation, reviewing detailed processes of mining industries, current situation for saving energy among mining and materials production industries are executed. Discussions on the evaluation methods for global warming, possibility of saving energy, location of smelters, etc. are made among the investigation. As the results, energy saving for the industries in japan is in the highest level all over the world and the effort to improved it almost reaches their limits at the moment. However, considering global environment, there are still possibilities to reduce the impact to the environment. Since the evaluation methods of saving energy for the global environmental has not fixed yet, worldwide discussions for the methods area expected. For the remarkable energy saving, instalment of new process is essential. For the achievement of the saving, continuous research and development are necessary. For the sustainable development of mineral industries and the promotion of global environmental protection, governmental backup and the contribution by national institutes are expected. (NEDO)

  13. FY1998 report on a survey related to joint utilization of welfare device development data using an international network; 1998 nendo kokusai network ni yoru fukushi kiki kaihatsu data no kyodo riyo ni kansuru chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    A survey was made in relation with joint utilization of welfare device development data using an international network. Developing welfare devices requires data from ergonomic and medical systems, while the cope of the objects is wide, and the kinds are various. For proliferation of welfare devices, system compatibility evaluation including that on using environment is important, including living environments that are different by countries. The present survey has identified how data for aged, handicapped and help-needing persons are accumulated and utilized in research organizations in America and Europe for both of the ergonomic and medical areas. The survey also investigated major academic societies in overseas countries, and collected database and academic network information that support the advanced research and development. At the same time, investigations were also made on organizations and corporations who are moving forward the efficient data utilization. Welfare device and service information providing systems in Japan were investigated to compare them with the trends in other countries. Conceptions and methods were compiled to utilize data internationally and jointly. Database models for device development were considered, and a proposal was made on structuring a research and development supporting database, and the operation method thereof. (NEDO)

  14. Fiscal 1999 research result report. Research on improvement of boiling heat transfer characteristics by photocatalyst wall; 1999 nendo hikari shokubai hekimen ni yoru futto netsu dentatsu tokusei kaizen ni kansuru kenkyu chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    Research was made on improvement of the wettability and boiling heat transfer characteristics of a photocatalyst wall. Measurement experiment of the wettability was made for anatase type titan oxide-coated Al, SUS and Pb plates, rutil type titan oxide-flame coated SUS plate, raw plate, and oxide-plasma coated titan plate. In the ground experiment, the contact angles of distilled water and oil on specimen surfaces were measured. In the microgravity experiment, falling droplet images were recorded by using the facility of Japan Microgravity Center (JAMIC). For obtaining the effect of radioactive emission, UV irradiation, {gamma} ray and neutron beam irradiation by nuclear reactor, and {gamma} ray irradiation by Co-60 were carried out. As the experiment result, the rutil type titan oxide-flame coated SUS plate, nonconductor-coated titan plate, and zircaloy plate showed large improvement of the wettability by {gamma} ray irradiation with Co-60. It was also confirmed that in particular, titan shows the large effect of radioactive emission, and the wettability deteriorates rapidly after {gamma} ray irradiation. (NEDO)

  15. FY 1997 report on the modification of dental materials with Ag for improvement of antibacterial activity; 1997 nendo chosa hokokusho (gin ion ni yoru shikayo zairyo no kokinsei fuyo ni kansuru kenkyu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    Improvement of an antibacterial activity is one of the issues in modification of artificial teeth for an aged society. Study was made on improvement technique of an antibacterial activity with Ag ion as secondary corrosion measures. Partial gaps of dental materials themselves and gaps between materials and peripheral tissues causes bad breath or bad teeth through propagation of disease germs. Ag ion is harmless and has an antibacterial activity for bio-tissues from a macro-viewpoint, however, only corrosion germ causing bad teeth in mouths should be sterilized by controlling an elution rate of Ag properly. The antibacterial activity was controlled by controlling Ag ion implantation depth and rate, and Ag elution rate for dental materials. Experiment was made on an IMZ twinplus specimen implanted with Ag ion and an Ag thin film-coated specimen using beagle dog in comparison with an unmodified specimen. As a result, the very favorable antibacterial activity was obtained. Ag ion is effective for prevention of endogenous infectious disease due to mouth germs in dental surgery. 3 refs., 47 figs., 10 tabs.

  16. Fiscal 1998 research report. Feasibility study on the CO{sub 2} reduction project by residue power generation at the oil refinery in China; 1998 nendo chosa hokokusho. Chugoku no seiyusho ni okeru zansa hatsuden ni yoru CO{sub 2} sakugen project ni kansuru F/S chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    As a part of the basic research on joint project promotion, this feasibility study supposed introduction of IGCC (integrated gasification combined cycle) to Nanjing oil refinery of Jinling Petrochemical Corp. (JPC) in China, estimated the CO{sub 2} emission reduction effect by in-refinery efficient power generation using petroleum coke residue as fuel, and assessed the feasibility of the project together with a cost benefit. The feasibility study result showed the effectiveness of IGCC introduction to the oil refinery for reducing CO{sub 2} emissions, occupying the interest of JPC. However, Nanjing oil refinery already making a decision to adopt another system (BTG) answered that early adoption of this project is difficult. The feasibility study result also showed that efficient operation of IGCC is difficult because of lower generation efficiency of petroleum coke residue, and achievement of the supposed CO{sub 2} emission reduction effect and profitability is difficult. The project based on this feasibility study result is probably difficult to be realized. (NEDO)

  17. FY 1998 survey report. Survey on reduction in environmental effect of greenhouse effect gas by the transfer of environmental technology in the Asian region; 1998 nendo chosa hokokusho. Asia chiiki ni okeru kankyo gijutsu iten ni yoru onshitsu koka gas no kankyo eikyo keigen ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    Effects of the transfer of environmental technology were studied as an important policy for control of greenhouse effect gas in the Asian region. As schemes, those that were drew up by NEDO, JICA, etc. now exist and are used also in Japan. However, for the control of greenhouse effect gas emission which is expected to rapidly increase in future, it is indispensable to construct a new powerful and effective scheme in which technology transfer and fund to be given are organically connected. Especially, in the U.S., etc., the assistance of developing countries of a huge amount of money such as Japan's ODA is not extended. However, they position the environmental technology as an important strategy and is developing the assistance of developing countries by technology transfer and eco-business of private companies. Also in the eco-business field, the environment-related technology of Japanese companies is used in Asian developing countries, with expectations of its being a new business with international competitive strength. This is the subject for the whole global environment, and an important subject also for Japan which requires the creation of a new business field with international competitive strength. (NEDO)

  18. Determination of standard Ghibbs free energy of formation of NiW sub 2 B sub 2 and activity of Ni-W binary system by EMF measurement. Kidenryokuho ni yoru NiW sub 2 B sub 2 no hyojun seisei Gibbs jiyu energy to Ni-W 2 seibunkei no katsuryo no sokutei

    Energy Technology Data Exchange (ETDEWEB)

    Kayama, Koichiro; Hashimoto, Yasuhiko; Suzuki, Kenji; Matsuo, Hideki (Himeji Inst. of Tech., Hyogo (Japan) Fukushin Electric Co., Ltd., Hyogo (Japan))

    1989-12-25

    NiW {sub 2} B {sub 2} (M phase), existing in trinary Ni-W-B system, was measured in standard Gibbs free energy (GF) of formation in the temperature range from 1273K to 1423K by an electromotive force method (EMF) with use of solid oxide electrolyte. First, oxide phase in equilibrium with three-phase M-W-Ni solid solution region was confirmed to be B {sub 2} O {sub 3}. Binary Ni-W system solid solution in equilibrium with M phase and W phase is constant in composition with Ni-16.4mo1%W in the above temperature range. WO {sub 2} and WO {sub 2.72} were actually measured in GF. As Ni-W solid solution is in equilibrium with WO {sub 2} and WO {sub 2.72}, binary Ni-W system was measured in activity by the EMF, and Ni-16.4mo1%W solid solution was calculated in GF of mixing by use of the above measured GF of WO {sub 2} and WO {sub 2.72}. Finally with use of sample in M-W-Ni solid solution region, M phase was calculated in GF by the EMF. The result of those calculations were expressed with experimental formulas. 19 refs., 10 figs., 3 tabs.

  19. FY1995 study of highly efficient power generation system based on chemical-looping combustion; 1995 nendo chemical loop nenshoho ni yoru kokoritsu hatsuden system no kaihatsu ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    Synthesis of highly efficient and low emission power generation plant with chemical-looping combustion using various fuels such as natural gas, coal gas and hydrogen. Development of new looping materials with suitable reactivity, regenerative ability, and avoidance of carbon deposition. To obtain the design data for demo-plant by using the current experiment high- pressure fixed bed reactor. From the viewpoint of application of the proposed power generation system with chemical-looping combustion, the following main results were obtained. 1. New looping materials: NiO/NiAl{sub 2}O{sub 4}, CoO-NiO/YSZ, and Co{sub 3}O{sub 4}/CoAl{sub 2}O{sub 4}. These materials have high reactivity, repeatability, and avoidance of carbon deposition which play important roles in application of this new combustor. 2. NO{sub x} formation can be completely avoided; both fuel NO{sub x} in reduction reactor for coal gas as fuel and thermal NO{sub x} in oxidation reactor. 3. It is identified from the experiment using fixed bed reactor with the elevated pressure that NiO/NiAl{sub 2}O{sub 4} is a suitable material for coal gas or hydrogen. These promising results have provided valuable data for industrial application. (NEDO)

  20. Study on the improvement of toughness of Nb-based super high temperature materials by forming solid solution and composites; Niobuki chokoon zairyo no koyoka to fukugoka ni yoru kyojinsei kaizen ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    If materials superior to Ni-based and Co-based super alloys could be developed, great progress is expected in the energy source saving, enhancement of aircraft speed, and simplification of member structure. Metals having high fusing point are prospective as well as C/C composites and ceramics among possible materials. Especially, Nb has a similar density to Ni, and its fusing point is 1,000 centigrade higher than Ni. It has also ductility. Furthermore, it is characterized by the formation of solid solution with other various metals having high fusing point. Accordingly, Nb-based composite alloys having excellent high temperature strength as well as excellent ductility and toughness can be developed by enhancing the solid solution formation and the dispersion with composites of compound phases using Nb as a base material. The purpose of this study is to provide fundamental data for the development of Nb-based composite alloys. The optimum matrix materials and their fabrication processes have been investigated, to evaluate their high temperature properties. Consequently, it was found that the enhancement by the deposition of intermetallic compounds or by the dispersion of oxides was an effective method for the formation of composites of Nb-based alloys. 4 refs., 88 figs., 24 tabs.

  1. Stress estimation around the survey wells in Hanshin-Awaji area by means of AE/DR and DSCA experiments; AE/DR ho to DSCA ho ni yoru Hanshin Awaji chiiki chosa kui shuhen no chikaku oryoku sokutei

    Energy Technology Data Exchange (ETDEWEB)

    Ito, H; Kuwahara, Y; Nishizawa, O [Geological Survey of Japan, Tsukuba (Japan); Yamamoto, K [Tohoku University, Sendai (Japan). Faculty of Science; Sano, O [Yamaguchi University, Yamaguchi (Japan). Faculty of Engineering; Yokoyama, T; Kudo, R [OYO Corp., Tokyo (Japan); Xue, Z [Kiso-Jiban Consultants Co. Ltd., Tokyo (Japan)

    1996-05-01

    A total of 5 wells were excavated in the Hanshin-Awaji area (Ikeda, Takarazuka, Tarumi, Hirabayashi and Ikunami) to collect the core samples, which were analyzed by the AE/DR and DSCA methods to determine crustal stresses. For the AE/DR analysis, the core sample was cut in the vertical direction, and in the horizontal direction at intervals of 45{degree}. The sample of unknown orientation was provided with a datum line common for both methods, to compare the results by these methods. A load was applied to the sample, provided with an AE sensor and strain gauge on the sides, in the longitudinal direction. For the DSCA analysis, the core sample was cut into a cube having a side length of 33mm, with a pair of planes directed in parallel to the datum line. A total of 18 strain gauges, 10mm in gauge length, were attached to the cube. The AE/DR analysis gave the maximum and minimum principal stresses in the horizontal plane and stresses in the vertical direction, whereas the DSCA the maximum, intermediate and minimum principal stresses. 3 refs., 7 figs.

  2. FY 2000 report on the survey of technology to reduce vehicle weight by applying new materials; 2000 nendo shinzairyo no tekiyo ni yoru jidosha keiryoka gijutsu no chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    As to the technology to reduce vehicle weight with the aim of energy conservation, survey was made of the present situation and technical subjects. Further survey was conducted on the applicability of ferrous and aluminum mesoscopic system control materials (super metal) under development. The application of high-tensile steel to vehicles is rapidly being developed as a means of weight reduction. To increase a rate of the use of high-tensile steel, limits of forming, characteristic improvement and rigidity need to be removed. Further, concerning the application of aluminum, subjects are press formability and joining. In regard to the development of ferrous super metal, characteristics with high ductility were obtained despite of such high strength as tensile strength of 930MPa, uniform elongation of 17%, and total elongation of 27%, which indicated that the super metal has an applicability to vehicle use thin steel sheets. The ferrous super metal, which enables the production of high-tensile steel sheet with no use of much alloy elements, is a material with high recycling ability. The aluminum super metal has also an applicability to vehicles. (NEDO)

  3. Report on an investigational research on energy conservation by a combination system between air compressor and pneumatic equipment in fiscal 1995; 1995 nendo kuki asshukuki to kukiatsu kiki no kumiawase system ni yoru sho energy no chosa kenkyu hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    The air compressor which rises pneumatics for actuating pneumatic equipment is very low in energy efficiency also including the power source. Conventionally, at works which use large lots of compressor power, for example, improvements have been made on such as leakage of pneumatics from compressor and pneumatic equipment and piping for power reduction, but the present situation is that processing including compressor and pneumatic compressor through exhaust gas treatment is not regarded as a synthetic system. Therefore, the following problems should be studied: (1) distributed installation of compressors at right place from centralized installation, reduction of pressure loss of piping, etc., and how to use pneumatic equipment and how to improve its performance; (2) energy conservation by lessening gap between compressor pressure and pressure in using pneumatic equipment; (3) energy conservation by improving exhaust gas treatment, etc. This time, an investigational research on these items was systematically conducted to study measures for energy reduction of power source and increase of efficiency. The study was made on making guides such as manuals which becomes effective for energy conservation measures and policies to be guidelines on the development of equipment. 9 refs., 46 figs., 9 tabs.

  4. FY 2000 Fundamental study for promotion of jointed implementations. Feasibility study on reducing greenhouse gas emissions by modernizing Thanlyin Refinery in Myanmar; 2000 nendo Myanmar koku Thanlyin seiyusho kindaika ni yoru onshitsu koka gas haishutsu sakugen kanosei chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    The feasibility study was conducted on a project in Myanmar for the energy saving effect and reduction of the greenhouse gas emissions by introducing modern refining facilities in Thanlyin Refinery of Myanmar Petrochemical Enterprise. The project items selected as a result of the study are improvement in the heat recovery efficiency of crude distillation unit, improvement in the furnace efficiency of crude distillation unit and coker plant, improvement in the efficiency of power plant, reduction of steam loss, modernization of the cooling water system, recovery and reuse of off-gas and LPG in crude distillation unit, and modernization of intermediate products run-down system. The conceptual designs and studies on these items indicate that implementation of these projects could lead to energy saving of 25,844 tons/y as crude and CO2 emission abatement of 57,457 tons/y, 46% and 33% reduction from the baseline. The total expenses for all of these items are estimated at 4,300 million yen. These are judged to be promising projects, with estimated investment recovery period of 9 years and internal profit rate of 12.9%, when the special yen loans are available. (NEDO)

  5. Fiscal 2000 research report on the research on materialss with functions enhanced by microcapsulation technology; 2000 nendo microcapsul ka gijutsu ni yoru kokinoka zairyo gijutsu no chosa kenkyu hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    Research is conducted to create materialss equipped, thanks to microcapsulation, with a noise stopping function, vibration damping function, moisture adjusting function, electromagnetic shielding function, and the like, and usable as structural elements as is, that is, materialss known as 'interactive materialss.' For the development of an interactive materials, it is important to incorporate an element, which interacts with external energy, into the materials. A system using interactive materialss when embodied will ensure a safer and more comfortable daily life space. Taking this into consideration, in this fiscal year, studies are made about the technical representation of problems and troubles that jeopardize the safety and comfort of the daily life space, establishment of standards in this connection, interactive features to be realized using microcapsules, possibility of novel interactive characteristics using the same, techniques for the systematization of microcapsules as industrial materialss, techniques for assessing and analyzing materialss characteristics, simulation or the like of a safe and comfortable space using interactive materials-aided systems, and so forth. (NEDO)

  6. Fiscal 1994 survey report. Part 2. Study on soil environment remediation system using ecological information and functions; 1994 nendo seitaikei joho to seitaikei kino ni yoru dojo kankyo fukugen system no chosa hokokusho. 2

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-03-01

    A survey is conducted of the feasibility of soil environment remediation through detecting contamination of soil and changes in ecosystems caused by industrial activities, with attention paid to biological antagonists. In this fiscal year, based on the results of surveys conducted in the past, studies are continued mainly on hypersensitive biosensing technology using ecosystem functions, remote sensing technology to monitor the terrestrial vegetation and soil environment over wide areas, and soil environment remediation technology using biological antagonists and vegetation. In consideration of Europe's long experience in this field, seven organizations known for their accomplishments are visited, where interviews are held. There is a close relationship between soil environments and ecosystems, and ecosystems are provided not only with information on changes in soil environments but also with functions to remedy soil environments by minimizing secondary contamination. To put such information and functions to practical use, element technologies are indispensable, including hypersensitive soil environment biosensors and environmental remediation by identification and isolation of biological information carrying substances and by vegetation. Proposed in this report is a project for soil remediation by use of biological information and functions and for elucidation of biological antagonists. (NEDO)

  7. Fiscal 2000 pioneering research report on the basic technology for novel DNA drug creation using anti-gene engineering; 2000 nendo anti gene kogaku ni yoru shinki DNA drug soshutsu kiban gijutsu chosa kenkyu hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    Research is conducted concerning the possibility of anti-gene engineering basic to the application of DNA (deoxyribonucleic acid) drugs capable of serving as functional DNAs to the control of the expression of industrially useful substance producing genes or of anomalous genes and concerning the possibility of novel industry creation on the strength of the said engineering. The specific research items are described below. Technical seeds are investigated relating to the tissue- and cell-specific drug delivery system for the expression of the molecular device function of the DNA drug. Concerning molecular target technologies such as the anti-sense method, possibilities are studied of utilizing the currently available technical seeds for the eventual creation of novel industries. Concerning novel designing methods utilizing genome information such as SNPs (single nucleotide polymorphisms), investigations are conducted to determine if they would help novel technology development and novel material development. The domestic state is surveyed in relation to DNA drugs, and possibilities are investigated of novel substance production and novel medicine creation with the aid of anti-gene engineering. (NEDO)

  8. Fiscal 1999 leading research report. Research on advanced functional material technology based on micro- capsule technology; 1999 nendo micro capsule ka gijutsu ni yoru kokinoka zairyo gijutsu no chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    Study was made on production technology of the 5th- generation material 'eco-smart composite structure' based on micro-capsule technology. This material ought to have an intelligent function including self-detection and self- restoration of defects, environmental harmony, high strength and long life. At present, these demands are implemented by embedding a sensor, actuator and controller in structure, or optical fiber, shape memory alloy and computer chip in matrix, however, such complex material structure has adverse effect on environment. On the other hand, single structure material such as biodegradable polymer is unusable in severe environment such as the ocean and space. These problems can be resolved by combining composite material and micro-sphere technology, for example fiber-reinforced plastic (FRP) composite structure including micro-capsules with nano particles. According to targets, this material can have a self-restoration intelligent function, and other environment friendly functions such as easy decomposition, sound insulation, oscillation damping, electromagnetic shielding and hygroscopicity. (NEDO)

  9. Exploration of shallow subsurface resistivity structure using a portable TEM system: TEM-FAST prosystem; Kan`igata TEM ho sochi TEM-FAST prosystem ni yoru senbu hiteiko chosa

    Energy Technology Data Exchange (ETDEWEB)

    Miura, Y; Kumekawa, Y; Takasugi, S [GERD Geothermal Energy Research and Development Co. Ltd., Tokyo (Japan)

    1997-05-27

    Discussions were given on effectiveness of the TEM-FAST ProSystem which is a portable TEM system developed recently for use in exploration of shallow subsurface resistivity. The system consists of a loop type antenna, the TEM-FAST as the main equipment, and a host computer, the host computer controlling the entire system. The system acquires transient response data in secondary induced magnetic fields lasting 4 {mu} sec to 1 m sec. The number of data is 5490 stacks in one measurement, and the data acquisition time is about three minutes. Measurements were carried out by using the TEM-FAST in the vicinity of a well, whose results were compared with those of electric logging, and discussions were given on them. Although the electric logging results had no data available for depths shallower than 35 m, the measurement results from the TEM-FAST were found highly harmonious with those of the electric logging. In addition, there were transmission and telephone lines in locations about 10 m away from the well during the measurement, but extremely high data quality was discovered. 6 refs., 7 figs., 1 tab.

  10. Development of the EM tomography system. Part 2. Sensitivity studies of anomalous body by model studies; EM tomography system no kaihatsu. 2. Model kaiseki ni yoru ijotai no kando chosa kekka

    Energy Technology Data Exchange (ETDEWEB)

    Kumekawa, Y; Miura, Y; Takasugi, S [GERD Geothermal Energy Research and Development Co. Ltd., Tokyo (Japan); Arai, E [Metal Mining Agency of Japan, Tokyo (Japan)

    1997-05-27

    A model analysis was used to investigate sensitivity of a two-dimensional structure on a resistivity anomalous body by using an electromagnetic tomography system. The resistivity model handled a three-dimensional structure. The model was prepared as a pseudo two-dimensional model in which a low resistivity anomalous body with 1 ohm-m was incorporated that has a basic length of 1000 m in the Y-direction in a homogenous medium having 100 ohm-m. As a result of the analysis, the following matters were elucidated: if a low resistivity anomalous body is present in a shallow subsurface, its impact starts appearing from lower frequencies than when the anomalous body exists only at a greater depth; if a high resistivity anomalous body exists, the detection sensitivity is lower than for the low resistivity anomalous body, but the analysis would be possible by using the phase because the phase has made a greater change; the source TxZ shows a change from lower frequencies than for the source TxX, and the amount of change is greater, hence the detection sensitivity on an anomalous body may be said higher with the source TxZ; however, for the anomalous body in shallow subsurface, the source TxX is more effective since it is not subjected to a too great impact at a greater depth. 5 refs., 7 figs.

  11. FY 1997 report on the improvement of toughness of silicide system intermetallic compounds by complex texture; 1997 nendo chosa hokokusho (fukugo soshikika ni yoru silicide kei kinzokukan kagobutsu no kyojinsei kaizen)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    In order to develop new materials superior in both room- temperature ductility and high-temperature strength, the basic data on MoSi2 intermetallic compounds with complex texture were stored. Intermetallic compound is one of the promising candidates of new super heat-resistant materials superior to conventional super heat-resistant alloys, however, it is extremely poor in ductility at room temperature. Based on available information on isothermal sectional phase diagrams of ternary system (Mo-Si-X system) composed of Mo silicide and the third element (X), some alloy systems were selected in consideration of use of carbide and nitride stably existing as dispersed phase of deposits at high temperature. A knowledge on phase diagrams of ternary system specimens with various compositions was obtained through arc melting, X-ray diffraction and texture observation, and heat treatment conditions for obtaining target complex textures were also determined. Storage of the basic data suggested that improvement of the ductility is possible by forming fine texture through addition of the third element and teat treatment. 21 refs., 58 figs., 15 tabs.

  12. FY 1998 annual report on the improvement of toughness of silicide-based intermetallic compounds by controlling their composite structures; 1998 nendo fukugo soshikika ni yoru shirisaidokei kinzokukan kagobutsu no kyojinsei kaizen chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    Intermetallic compounds, although attracting much attention as most promising materials serviceable at superhigh temperature, are very fragile at normal temperature, which is one of their major disadvantages. Structures of these compounds prepared by the melting method are controlled to improve their toughness by, e.g., changing phase ratio of the initial crystal for the Mo-Si-Nb system to prevent cracking during the melting and casting stages, addition of a third element (e.g., Zr, Ti or Hf) or a mixed component of Nb and Zr to control the structure of Mo{sub 5}Si{sub 3} considered to be a cause for the cracking, and controlling melting and solidification rates for the FZ melting method. The three-phase microstructures with added Hf or Zr show improved toughness, but need additional procedures for controlling solidification and cooling conditions. For the powder method, the MA conditions are investigated with a two-element system, and the effects of Al or Zr as the third element added to the base composition on the composite microstructures and constituent phases are also investigated. Unlike the melting method, the powder method causes no cracking problems during the stock preparation stage and hence is expected to be applicable to production of larger stocks. However, the products by this method are found to be insufficient both in toughness and high-temperature strength. It is necessary to develop methods for cutting down and controlling oxides in the grain boundaries, in order to prevent deterioration of their strength at high temperature. (NEDO)

  13. Fiscal 2000 survey report. Development of autonomous surface reforming technology by use of multi-energy laser (MEL); 2000 nendo taju ihacho laser (MEL) ho ni yoru chokoshitsumaku no jiko hyomen kaishitsu gijutsu no kaihatsu chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    An experiment was conducted using a MEL (multi-energy laser) method in which multiple laser devices were operated for the formation of an ultra-hard surface reformed layer. At the first step of the research, a carbon-based material was irradiated with various laser beams in an CO2 gas atmosphere, and the hardness, Raman spectrum, etc., of the surface structure were evaluated. As the result, it was found that the formation of diamond like carbon (DLC) texture advances faster when the excited wavelength is longer from ArF laser toward SHG-YAG laser. At the second step, an effort was made to grow DLC out of tungsten carbide. When a normal pulse YAG laser beam was projected on a WC-Co substrate, W was dissociated on the surface for the precipitation of graphite. Next, XeCl excimer laser was projected on the precipitated graphite, and then the graphite was reformed into DLC. In this experiment, transition from graphite to DLC was controlled by changing the delay time lengths of the two laser beams. (NEDO)

  14. FY 1998 annual report on the development of novel, high-activity oxygen electrode by ion-implantation; 1998 nendo ion chunyuho ni yoru shinkina kokassei sanso denkyoku no kaihatsu chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    An attempt has been made to develop an electrode material having high activity for oxygen generating reactions by ion-implantation, which is used to form the bulk defects (fine gaps at the atomic level) on the electrode surface, considered to serve as the active sites. It is found that implantation of the Co{sup +} or Zn{sup +} ion into a compound oxide electrode of Ti and Ru is accompanied by decreased overvoltage for oxygen generation by 50 to 100 mV. The Co{sup +} and Zn{sup +} ions, when implanted, cause damage of similar density in the thin film, decreasing its overvoltage to a similar extent, in spite of their different chemical properties, from which it is considered that the effect of ion implantation is not to change chemical properties of the film but to form a structural defect therein. A thin-film electrode of ruthenium dioxide, which is considered to be the oxygen generating electrode of the highest activity at present, is prepared and implanted with the Ru{sup +} ion, to observe the effect. The ion implantation also decreases the overvoltage by 50 to 70 mV, demonstrating its effect. The same principle is expected to be applicable to development of high-activity oxygen reducing electrode (electrode for fuel cell). (NEDO)

  15. Report on technological survey in fiscal 1999. Demonstration test for smoothing grid interconnection (Demonstration test using simulation); 1999 nendo keito renkei enkatsuka jissho shiken chosa hokokusho. Simulation ni yoru jissho shiken

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    Examinations have been made by using simulation on a device having single operation detecting function, that is the single operation detector. The discussions are given on (1) an induction generator and a reactive power compensation type detector system interconnected to a high-voltage grid, and (2) a three-phase inverter, a reactive power variation type detector, and a QC mode frequency shifting detector system. In Item (1), it was learned that, because of variation induction force being small in the case of operation having become single operation, the variation signal must be made greater, and in Item (2), the discussions have not gone as far as a conclusion can be drawn. In addition, assuming a synchronous motor interconnected to a high voltage grid, discussions were given on the effects of disturbance to the interconnected system on the functions of the single operation detector, whereas it was verified that there are no problems in practical use. Furthermore, discussions were given on the self excitation phenomenon in an induction generator, and requirements for omitting the ground fault overvoltage relay in a discrete type power supply. (NEDO)

  16. FY 1998 annual report on the CO{sub 2} reduction by 30 manufacturing companies (plants) through energy conservation. Thailand; Seizogyo 30 sha (kojo) no sho energy ni yoru CO{sub 2} haishutsuryo sakugen 1998 nendo chosa hokokusho. Taikoku

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    This project is aimed at energy-saving diagnosis of 30 energy-intensive manufacturing plants in Thailand, to draw the project plans and clarify, e.g., greenhouse effect gas reduction and cost-effectiveness effects, on the basis of transferring and applying the energy management and energy-saving equipment technologies now being used by the manufacturing sector in Japan. The 30 plants analyzed are 6 metal-related plants, 3 non-ferrous plants, 5 chemical plants, 6 ceramics plant, 4 textile plants, 4 food processing plants and 2 pulp plants. Two or more feasible energy-saving measures are studied for each plant. A total of 178 improvement measures (approximately 6 on the average for each plant) are identified as the ones related to energy-saving and operation controlling techniques. These measures could reduce CO2 emissions by 145,000 t/y from 1,370,000 t/y released from the 30 plants. The measures of high cost-effectiveness are (use of an appropriate pressure for air compressors) and (resting of transformers on non-working days). (NEDO)

  17. FY 2000 survey report on the project on energy conservation/environmental preservation for oil corporations in Croatia by rehabilitation of oil refinery; 2000 nendo Croatia sekiyu kosha muke seiyusho no rihabiri ni yoru shene kankyo hozen project chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    For the purpose of strengthening the international competitive force in the oil industry of Croatia and reducing greenhouse effect gas by introducing energy conservation technology, study was made of the rehabilitation of oil refineries (Rijeka and Sisak) of Croatia's oil corporation, INDUSTRIJA NAFTE d.d. (INA). Rijeka and Sisak Refineries have the oil processing capacity of 6 million t/y and 4.6 million t/y, respectively, but they were constructed during the 1960s-1970s and are now superannuated. In this project, the following are adopted: heightening of the temperature of raw material supply, surging avoidance control, reutilization of condensate water of vacuum distillation, heightening of MEA concentration, control of excess air ratio in heating furnace, preheating of combustion air in heating furnace, application of small-diameter pump impeller, the optimum control of steam/electric system, heightening of temperature of cleaning water of desalting device, stop of adoption of flare seal gas, etc. The energy conservation effect to be expected from the project is 43,065 toe/y in a total of the two refineries, and the reduction in greenhouse effect gas is 133,000 t-CO2/y. Further, the internal return rate is 53.12%, which is very attractive for INA. (NEDO)

  18. Fiscal 1994 survey report. Part 2. Study on soil environment remediation system using ecological information and functions; 1994 nendo seitaikei joho to seitaikei kino ni yoru dojo kankyo fukugen system no chosa hokokusho. 2

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-03-01

    A survey is conducted of the feasibility of soil environment remediation through detecting contamination of soil and changes in ecosystems caused by industrial activities, with attention paid to biological antagonists. In this fiscal year, based on the results of surveys conducted in the past, studies are continued mainly on hypersensitive biosensing technology using ecosystem functions, remote sensing technology to monitor the terrestrial vegetation and soil environment over wide areas, and soil environment remediation technology using biological antagonists and vegetation. In consideration of Europe's long experience in this field, seven organizations known for their accomplishments are visited, where interviews are held. There is a close relationship between soil environments and ecosystems, and ecosystems are provided not only with information on changes in soil environments but also with functions to remedy soil environments by minimizing secondary contamination. To put such information and functions to practical use, element technologies are indispensable, including hypersensitive soil environment biosensors and environmental remediation by identification and isolation of biological information carrying substances and by vegetation. Proposed in this report is a project for soil remediation by use of biological information and functions and for elucidation of biological antagonists. (NEDO)

  19. Fiscal 1999 leading research report. Research on advanced functional material technology based on micro- capsule technology; 1999 nendo micro capsule ka gijutsu ni yoru kokinoka zairyo gijutsu no chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    Study was made on production technology of the 5th- generation material 'eco-smart composite structure' based on micro-capsule technology. This material ought to have an intelligent function including self-detection and self- restoration of defects, environmental harmony, high strength and long life. At present, these demands are implemented by embedding a sensor, actuator and controller in structure, or optical fiber, shape memory alloy and computer chip in matrix, however, such complex material structure has adverse effect on environment. On the other hand, single structure material such as biodegradable polymer is unusable in severe environment such as the ocean and space. These problems can be resolved by combining composite material and micro-sphere technology, for example fiber-reinforced plastic (FRP) composite structure including micro-capsules with nano particles. According to targets, this material can have a self-restoration intelligent function, and other environment friendly functions such as easy decomposition, sound insulation, oscillation damping, electromagnetic shielding and hygroscopicity. (NEDO)

  20. Fiscal 2000 report on investigation. Investigation of demonstrative test for harmonizing system interconnection (demonstrative test by simulation); 2000 nendo keito renkei enkatsuka jissho shiken chosa hokokusho. Simulation ni yoru jissho shiken

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    With the purpose of promoting the spread of dispersed power generating facilities, study was conducted on technical problems concerning system interconnection of dispersed generating facilities using a simulation, with fiscal 2000 results compiled. In the validity verification of an active type islanding detection equipment in a low voltage system interconnection, the simulations were made for the duration of ten seconds after the start of the islanding, with the detection time examined. In the case of the interconnection with a single unit, islanding was generally detected within ten seconds of the simulation time; in the case of the interconnection with multiple units, however, a trend was observed in which a frequency shift method was liable to receive interference from other methods. In the validity verification of the active type islanding detection equipment in a high voltage system interconnection, islanding was detected within ten seconds in the case of the single unit interconnection; in the case of the two unit interconnection, however, it revealed difficult conditions for islanding detection in the event of interconnection with a large capacity synchronous generator and in the presence of interference of variable signals. Additionally, examination was made on such subjects as countermeasures against high/low voltage short-circuit accident in low voltage systems and limitation in introducing photovoltaic power generation on account of rise in voltage of a system line. (NEDO)

  1. Improvement of the detection limits in radio-frequency-powered glow discharge optical emission spectrometry associated with bias-current conduction method; Jiko bias denryu donyuho ni yoru koshuha glow hoden hakko bunseki ni okeru kenshutsu genkai no kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Wagatsuma, K. [Tohoku University, Sendai (Japan). Research Institute for Materials

    1999-01-01

    A d.c. bias current driven by the self-bias voltage which is conducted through the r.f.-powered glow discharge plasma varies the emission characteristics drastically, leading to improvement of the detection power in the optical emission spectrometry. By conducting the bias currents of 20-30 mA, the emission intensities of the atomic resonance lines were 10-20 times larger than those obtained with conventional r.t.- powered plasmas. The detection limits for determination of alloyed elements in the re-based binary alloy samples were estimated to be l.6 x 10{sup -3}% Cr for CrI 425.43nm, 7 x 10{sup -4}% Mn for MnI 403.10nm, 1.9>10{sup -3}% Cu for CuI 327.40nm, 1.1 x 10{sup -3}% Al for AlI 396.16nm, and 6.6 x 10{sup -3}% Ni for NiI 352.45 nm. (author)

  2. Detection of strain behavior during phase-transformation in welds by the laser speckle method. Report 3. Application of the laser speckle method to strain masurement in the welding process; Reza supekkuru ho ni yoru yosetsubu no sohentai tojo no hizumi kenshutsu. 3. Reza supekkuru ni yoru hizumi sokuteiho no yosetsu eno tekiyo

    Energy Technology Data Exchange (ETDEWEB)

    Muramatsu, Y.; Kuroda, S. [National Research Inst. for Metals, Tsukuba, Ibaraki (Japan); Gross, H-G. [Rostock Univ., Rostock (Germany)

    1996-11-05

    It corresponds to an information relating to defect formation due to residual stress and its accompanying defect formation to find out the period of phase-transformation and expansion volume on the transformation forming at welding. In order to estimate texture of the heat affected zone, there is an SH-CCT diagram, which is important on weld metallurgy. However, this is formed by giving a thermal recycling to a small size specimen under stress-free, which has some problems to estimate the transformation starting period in actual welding. And, the expansion volume containing the transformation cannot be found out directly by this. In this study, as the first step adaptable to this problem with laser speckle method measurable with non-contact and high precision, a linear heating with TIG to a SUS304 stainless steel thin plate without transformation was executed at first, the strain behavior accompanied with it was confirmed. Secondly, using a thin plate of 9% Ni steel showing any transformation at comparatively low temperature, probability of a phase transformation detection was investigated on a way of cooling by executing resemble linear heating. As a result, the laser speckle method was confirmed to be adaptable to this problem. 14 refs., 17 figs., 1 tab.

  3. FY 1998 annual report on the research on the possibility of introducing a usable chemical substance manufacturing system by utilizing natural gas containing CO2; CO{sub 2} gan'yu tennen gas den katsuyo ni yoru yuyo kagaku busshitsu seizo system donyu kanosei ni kansuru chosa kenkyu 1998 nendo chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    The trends of effective use of gas containing CO2 from natural gas fields are surveyed, and usable chemical substance manufacturing systems which utilize natural energy are investigated, evaluated and analyzed, to extract promising systems for effective use of CO2-containing natural gas and thereby to promote its effective use. Chapter 1 outlines possibility of integrated use of gas containing CO2 from natural gas fields and natural gas energy. Chapter 2 describes the research trends in the CO2 conversion reactions for using unexploited CO2 as the carbon source. Chapter 3 describes natural energy utilization technology applicable to gas containing CO2 from natural gas fields. Chapter 4 describes performance of chemical manufacturing systems utilizing natural gas containing CO2. The energy balances and CO2 emission coefficients are estimated, based on the above. The evaluation is implemented in the order of (1) conventional steam reforming, (2) steam reforming in which heat is supplied by a solar furnace, (3) examination of the exhaust gases from a methanol synthesis process, and (4) examination of CO2-mixed reforming. Chapter 5 describes summary and proposals. (NEDO)

  4. FY 1997 report on the research study on the effect of the active use of bio-technology on energy and social systems; 1997 nendo chosa hokokusho (bio-technology no katsuyo ni yoru energy shakai system ni oyobosu koka no chosa kenkyu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    For construction of a sustainable society by active use of bio-technology, a research study was made on the current state of active use of bio-technology for every industrial or social field, and the basic recognition and orientation for practice and diffusion of bio-technology. The previous typical examples of the effect of bio-technology on energy and social systems were evaluated from not only an affirmative viewpoint but also a compensatory viewpoint. Based on these examples, promising features of bio-technology and measures for active use of such features were showed for the future energy and social systems from a technological viewpoint. As a scenario for sustainable development of a society, some approaches and values about collection of rare resources, agriculture based on mass circulation, and recurrence to high-protein traditional foods such as fermented food were showed for balanced development of environment, population, and resources including energy and food. 8 refs., 14 figs., 8 tabs.

  5. FY 2000 Report on technological trend surveys. Surveys regarding construction of the co-production techniques for substance and electric power; 2000 nendo gijutsu doko nado chosa hokokusho. Busshitsu to denryoku heisan ni yoru co-production gijutsu no kochiku ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    This project is aimed at surveys on the elementary and peripheral techniques necessary to construct the systems, with the objective to draw the conceptual designs of the total system for co-production of a substance and electric power. In a general reaction process, substances are produced under an advantageous condition that is dependent on reaction rate and equilibrium, where most of the energy is dissipated in the form of sensible and latent heat without being used for the chemical reaction. The co-production system under consideration uses high temperature of 500 degrees C or higher exhausted from a power station or industrial unit to produce macromolecules or synthesis gases, wherein the exothermic reaction increases temperature of the heat source, which is recovered in the form of steam for driving the steam turbine to produce electric power. On the other hand, low-temperature waste heat of around 150 degrees C is converted into a liquid fuel or other value-added products by the liquid phase pressurized system. The elementary techniques to construct these processes are surveyed, and the thermal processes are analyzed. The investigated items include substance production processes, electric power production processes and total systems. (NEDO)

  6. Survey report for fiscal 1999 on internationalization of technologies for effective use of energy resources. Survey by exploration of international cooperative researches on energy-saving through advanced use of steel slag; 1999 nendo energy shigen yuko riyo gijutsu kenkyu kokusaika chosa hokokusho. Tekko slag no kodo riyo ni yoru sho energy gijutsu ni kansuru kokusai kyodo kenkyu no tansaku chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    As for the collection of sensible heat, 1/3 of blast-furnace slag is treated to the purpose at the Teesside Technology Centre, Britain, but none is collected in the latter half of tapping in case there is so much slag that cooling cannot be done in time. In the case of a large blast furnace, some measures have to be contrived because molten iron comes out of the furnace intermittently. In Germany, the heat collection rate is as low as 3%, with no effort made at heat collection. In North America, desire to develop such a technology is not strong. A visit was made to the Institute of Ocean Sciences, Canada, in relation to the concept of using steel slag as a eutrophic source for marine photo-plankton. A large-scale long-term test is under way for examining the relationship between global warming and ocean current circulation. There are possibilities that Japan will enter into the project for a joint study, for example, of heavy metal elution from slag though the test fails to name slag as the direct object of study. Not only for Canada but also for any other country who faces the sea, it may be a meaningful national policy to inject some active ingredients into the sea for an increase in living marine resources. Greece is engaged in the ocean dumping of nickel slag on an experimental basis but, in view of the purpose of the experiment, Japan will not be a participant in the project. (NEDO)

  7. Fiscal 1997 survey report. Investigational study on the cascade utilization of thermal energy (cold heat and hot heat) (feasibility study by the off-line system); 1997 nendo chosa hokokusho. Netsu energy (reinetsu to onnetsu) no cascade riyo ni kansuru chosa kenkyu (off-line hoshiki ni yoru feasibility study)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    The paper studied a system to effectively use unused and low-grade thermal energy (cold heat and hot heat) in the Tokyo-Yokohama seaside area. For transportation of thermal energy, the batch transportation, that is, off-line system was discussed which uses insulated tank loaded barges and railroad freight trains. Thermal energy supply sources are 1) 0.3 million kW class thermal power plant, and 2) LNG storage base of 3 million ton/year class. Thermal energy users are Tokyo (Haneda) Airport D.H.C. (District Heating/Cooling Co.), MM 21 D.H.C. and Shin-Kawasaki D.H.C. The cold heat energy supplied to these three is about 1.5 million Mcal/daytimes300 days/year, and the hot heat energy supplied is about 1.33 million Mcal/daytimes150 days/year. Cold heat is obtained from seawater after the LNG vaporization, and hot heat from heat extracted from thermal turbine. Subcooled ice was selected for cold heat medium, and PCM-120A for hot heat medium. For batch transportation, an STL heat storage system is used which transports plastic capsules sealed with heat medium. Oil saving of 62,000 tons/year and CO2 reduction of about 53,000 tons/year can be expected. 85 figs., 98 tabs.

  8. Fiscal 1995 survey of the base arrangement promotion for foreign coal import. Investigation on the policy of coal demand stabilization using low grade coal; 1995 nendo kaigaitan yunyu kiban sokushin chosa. Teihin`itan riyo ni yoru sekitan jukyu anteika hosaku ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    The paper investigated the trend of and the needs for low grade coal utilization and the seeds of low grade coal utilization technology and studied usability of low grade coal in the future. Importance of low grade coal utilization was described in consideration of features of the Asia/Pacific area in the world coal market, and the trend of production/utilization of low grade coal was examined mostly in countries holding main low grade coals in the Asia/Pacific area. The trend of the technical development contributing to the low grade coal utilization was studied to make it contribute to the extraction of technologies which are regarded as effective in the Asia/Pacific area. A study was made of applicability of the low grade coal utilization technology corresponding to the needs for low grade coal utilization, and at the same time, a study was made of the effect on the coal supply/demand in the Asia/Pacific area in case the low grade coal utilization is promoted helped by the study. Focusing on technical cooperation relating to clean coal technology, a study was conducted of the trend of international cooperation in Japan and various overseas countries and the trend of new cooperation in private sectors, and a discussion was made on how Japan should act toward promotion of low grade coal utilization. 12 figs., 91 tabs.

  9. FY 1998 annual report on the research on the possibility of introducing a usable chemical substance manufacturing system by utilizing natural gas containing CO2; CO{sub 2} gan'yu tennen gas den katsuyo ni yoru yuyo kagaku busshitsu seizo system donyu kanosei ni kansuru chosa kenkyu 1998 nendo chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    The trends of effective use of gas containing CO2 from natural gas fields are surveyed, and usable chemical substance manufacturing systems which utilize natural energy are investigated, evaluated and analyzed, to extract promising systems for effective use of CO2-containing natural gas and thereby to promote its effective use. Chapter 1 outlines possibility of integrated use of gas containing CO2 from natural gas fields and natural gas energy. Chapter 2 describes the research trends in the CO2 conversion reactions for using unexploited CO2 as the carbon source. Chapter 3 describes natural energy utilization technology applicable to gas containing CO2 from natural gas fields. Chapter 4 describes performance of chemical manufacturing systems utilizing natural gas containing CO2. The energy balances and CO2 emission coefficients are estimated, based on the above. The evaluation is implemented in the order of (1) conventional steam reforming, (2) steam reforming in which heat is supplied by a solar furnace, (3) examination of the exhaust gases from a methanol synthesis process, and (4) examination of CO2-mixed reforming. Chapter 5 describes summary and proposals. (NEDO)

  10. FY 2000 report on the basic survey to promote the joint implementation. Potential survey of the greenhouse effect gas reduction by high-efficient utilization of the oil residue in Bataan Refinery in the Philippines; 2000 nendo kyodo jisshi nado suishin kiso chosa hokokusho. Philippines koku Bataan seiyusho ni okeru sekiyu zansa kokoritsu riyo ni yoru onshitsu koka gas sakugen kanosei chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    For the purpose of reducing the CO2 emitted from electricity/vapor supply facilities of Bataan Refinery in the Philippines, study was conducted of optimum energy supply facilities considering the effective use of the oil residue and future reinforcement of the refinery. Concerning the high-pressure/high-temperature condensing extraction boiler/turbine cogeneration, gas turbine cogeneration and low speed diesel engine cogeneration, comparative study was carried out in terms of thermal efficiency, reliability/preservation, environmental acceptability, effectiveness of measures for the future excessive oil residue, etc. As a result, the study was concluded as follows: the electric power consumption will markedly increase in the future; however, in the light of the situation of the refinery where the vapor demand will not increase, it is the most suitable to use low speed diesel engine cogeneration facilities as on-site power generation facilities which can burn the excessively increasing oil residue as direct fuel. The CO2 reduction effect estimated from the project on the present scale was 132,880 t-CO2/y, and the energy conservation effect estimated was 50,861 toe/y. (NEDO)

  11. Fiscal 1997 survey report on the jointly executed/promoted basic survey project (the jointly executed activity Japan Program). Feasibility survey for CO2 reduction by deregulating heavy traffic at specified crossings in Bangkok, Thailand; 1997 nendo chosa hokokusho (kyodo jisshi suishin kiso chosa jigyo (kyodo jisshi katsudo Japan program)). Taikoku Bangkok no tokutei kosaten ni okeru kotsu jutai kanwa ni yoru CO2 sakugen kanosei chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    The monetary crisis in Thailand with the baht drop in July 1997 as a beginning rapidly worsened the Thai economy. With it, the number of automobiles sold sharply declined, and automobile manufacturers were also heavily damaged as seen in the temporary discontinued production, etc. Under such economic situation, a discussion was made on execution of the project with the Thai Automotive Industry Association (TAIA), a partner at the Thai side. As a result, agreement was made on the positioning of the project, role sharing, and selection of measures against heavy traffic as follows: Japan Automobile Manufacturers Association (JAMA) conducts a feasibility study, proposal of a construction plan and confirmation of effects, and bears the costs. TAIA bears the execution and cost of construction (Due to the worsened Thai economy, JAMA paid almost all the construction expenses). In the light of the economic situation in Thailand, `improvement of the signal control system` was selected as an execution candidate, which has the highest cost effect among the measures against heavy traffic. In the future, the application, registration and execution are done for joint activities for the project. 49 figs., 59 tabs.

  12. Report on the FY 1999 research survey on the development of high ductile chromium alloys; 1999 nendo koensei kuromu gokin no kaihatsu ni kansuru kenkyu chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    The R and D of chromium alloys had been conducted till about the 1970s, which brought the unfavorable results. That's why chromium alloys are brittle at normal temperature and difficult in processing. However, the technology development in recent years review them. The development is earnestly desired also of the materials exceeding the Ni base super alloys which are heat resistant materials for power generation. Cr is rich as resource and light-weighted, and the oxidation film is stable and self-restorational at high temperature. The alloys are excellent in processability at normal temperature and excellent also in toughness. The nitrogen content is strongly concerned with brittleness and intergranular fracture at normal temperature. Therefore, Cr alloys were trially manufactured by the HIP sintering/hot forging method using electrolytic Cr powder with high-purity (99.99%) and low-nitrogen (10ppm) to study a possibility of improving brittleness at normal temperature, mechanical properties at high temperature, oxidation resistance, high-temperature corrosion resistance, etc. A variety of excellent characteristics of Cr alloys were made clear. However, also made clear were the problems: strength is low at normal temperature/high temperature; screw process is impossible because of high notch sensibility; those are not almighty high-temperature corrosion resistant materials. Further efforts should be exerted for the commercialization. (NEDO)

  13. Trend survey of the global environment adaptation type industrial technology. Trend survey of global environment related studies (researches on measureds for reduction of environmental load of CO2); Chikyu kankyo tekiogata sangyo gijutsu doko chosa. Chikyu kankyo kanren kenkyu doko no chosa (nisanka tanso no kankyo fuka teigensaku ni kansuru chosa kenkyu)

    Energy Technology Data Exchange (ETDEWEB)

    1992-03-01

    The paper studies the measures for reduction of environmental load of CO2 from the standpoint of chemical technology. As for methanol synthesis from CO2, accelerating of the reaction using Cu base compound catalyst is reported. Also, CO2 is methanated at high speed by low temperature waste heat using Ni-La2O3-Ru catalyst. Discussions are given on the subject for development of catalyst reaction relating to hydrogen production technology by methane reforming reaction using steam or CO2. Synthesis of polymetric materials by use of CO2 is also described. The paper mentions that it is indispensable to design high-function electrode and elucidate the reaction mechanism of electrochemical CO2 reduction for electrochemical and photochemical CO2 reduction measures. Moreover, in case of using solar energy, it is required to study photovoltaic excitation process in semiconductor electrode/ electrolyte solution interface. For production of hydrogen from CO2 by photosynthetic organisms and solar energy, the problem is control of inhibiting effect of oxygen combinedly produced. Described are production of polyhydroxy butyric acid and biodegradable polymer from CO2 and hydrogen by bacteria, and CO2 fixation imitating the enzyme reaction. 267 refs., 79 figs., 32 tabs.

  14. Research report for fiscal 1998. Basic research for promoting joint implementation for CO{sub 2} reduction at Keio University; 1998 nendo chosa hokokusho. Keio Gijuku Daigaku ni yoru CO{sub 2} sakugen no tame no kyodo jisshi suishin kiso chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    A research is conducted into China's current problems of energy-related environments, and studies are made for the assessment of its potentials for greenhouse gas reduction, such as CO2 from coal, and for the prevention of environmental pollution in urban areas. By the survey of the current states of the supply and demand of energy and heat in China, and in Beijin, it is found that fuel conversion, which means the disuse of coal in this case, is necessary for a success in SO2 measures in the heat supply department. Since the rate of concentrated heat supply undertaken by heat supply businesses is low, it is inferred that potentials for CO2 reduction are quite high in this department. Concerning technological problems about conversion from coal to natural gas and heat supply, deliberation is made on a scenario covering how to approach the energy demand model, combustion in the natural gas boiler, and the home heating fuel. In discussing air pollution in China, the difficulty known as transboundary air pollution is taken up. It is concluded that conversion from coal to natural gas or coal disuse will serve effectively the purposes of energy saving, SO2 reduction, and CO2 reduction. (NEDO)

  15. Fiscal 1999 basic study for promotion of joint implementation. Study of greenhouse gas reduction by modifying the power generation system of a power station in the Republic of Kazakhstan; 1999 nendo Kazakhstan ni okeru hatsudensho no hatsuden system kaishu ni yoru onshitsu koka gas sakugen ni kansuru chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    A feasibility study is conducted aiming to reduce greenhouse gas emissions by refurbishing obsolete power stations in Shymkent City, the Republic of Kazakhstan. The clean development mechanism is also discussed. Aircraft engine-derived 20MW-class gas turbine cogenerators will be introduced, one each into a 1st and 2nd power stations. A simple-cycle model of the same will also be introduced into the 1st power station. The facility costs will be US$61.279 million for the 1st power station and US$33.590 million for the 2nd power station. The amount of fuel to be saved will be 238.6-thousand tons/year in terms of oil, totalling 5,964-thousand tons in a 25-year period. As for the reduction of greenhouse gas emissions, there will be a 737.9-thousand tons/year reduction in terms of CO2, meaning a total reduction of 18.448-thousand ton in a 25-year period. An FIRRROI (Financial Internal Rate of Return on Investment) is tentatively calculated using power and heat prices presented by the other party. The result of calculation shows that the net cash flow before and after tax stays negative throughout the whole operating period, which means a total lack of cost effectiveness. This is attributed to the low power and heat unit prices set by the other party, extremely lower than the internationally accepted prices. The FIRRROI after tax will turn positive when the unit prices are 1.5 times higher and the total investment is reduced by 20%. (NEDO)

  16. FY 2000 Fundamental study for promotion of jointed implementations. Feasibility study on energy saving effect and reducing CO2 emissions by use of RDF in cement plants in China; 2000 nendo Chugoku cement kojo ni okeru RDF katsuyo ni yoru shoene koka oyobi nisanka tanso haishutsu sakugen ni kansuru feasibility study chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    The feasibility study was conducted on a project in China for energy saving and greenhouse gas emission reduction by introducing the energy-saving and alternative energy technologies in cement plants. The cement plant selected for the feasibility study is Shanghai Plant of Shanghai Allied Cement Co., Ltd. (SAC), for RDF receive and supply facility, chlorine bypass facility, exhaust heat power generation facility and RDF production facility. The study results indicate that the exhaust power generation can save energy of 4,700 tons/y as crude, or energy saving rate of 25.5%, and that replacing part of coal by RDF and exhaust power generation can reduce CO2 emissions by 25,500 and 18,500 tons/y, respectively. For the investment recovery, it is estimated that the investment can be recovered in 9 years, and the project value is 81.399 million Yuan with the initial investment and project profit in each year discounted to the present value. These results fail to satisfy the SAC's investment standards. (NEDO)

  17. Achievement report for fiscal 1976 on Sunshine Program. Comprehensive examination of hydrogen-utilizing subsystems and research on peripheral technologies (Survey and research on hydrogen production by quinon method); 1976 nendo suiso riyo subsystem no sototeki kento to shuhen gijutsu ni kansuru kenkyu seika hokokusho. Kinonho ni yoru suiso seizoho ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1977-03-01

    The quantum yield and conversion efficiency are measured during photosensitized water decomposition at an n-type TiO{sub 2} semiconductor electrode built from a rutile type single crystal, and the role of the TiO{sub 2} electrode is clearly defined. A method is tested of acquiring a photoactive TiO{sub 2} semiconductor as an oxide coating and an oxide coating electrode is fabricated, and its characteristics are determined and then compared with the above-said measurements. A WO{sub 3} semiconductor is manufactured, and its characteristics are compared with the above-said measurements. The mechanism of photosensitized decomposition at a semiconductor electrode is examined, and guidelines are established to follow for improvement on efficiency in semiconductor electrode-aided hydrogen production. Dark and light reactions are caused to occur by adding methyl viologen, potassium ferrocyanide, and potassium ferricyanide, and the photochemical reaction characteristics are clearly defined. Oxygen is generated by use of chloroplast. Use of an acrylamide membrane and an osmotic membrane enables a continuous 48-hour test. A solar beam is concentrated on a TiO{sub 2} electrode for a reaction of Q+H{sub 2}O{yields}QH{sub 2}+1/2O{sub 2}{up_arrow} to occur. A reaction of QH{sub 2}{yields}Q+H{sub 2}{up_arrow} is caused to occur as an electrode reaction. A current of 3.7mA and a voltage of 2.4mV are recorded on a fine day at the beginning of October, and 0.4mA and 0.2mV on a cloudy day. (NEDO)

  18. FY 1999 report on the results of the introductory study on the global environmental industry technology. Investigational study on the environmental creation technology by the application of ecosystem information functions; 1999 nendo chikyu kankyo sangyo gijutsu ni kakawaru sendo kenkyu seika hokokusho. Seitaikei joho kino oyo ni yoru kankyo sozo gijutsu ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    To know the state of environmental pollution before it clearly exists, an investigational study was made on the technology to measure environmental stress at high sensitivity, in wide range and at high speed using functions to respond chemical substances, etc. which living organisms have. The FY 1999 results were outlined. As to the application of ecosystem information functions, survey was conduced paying attention to the environmental stress response of each of the bacteria, algae, plants and animals, responses viewed from the manifestation of immunity antibodies which occurs inside living organisms and changes at genetic level, and responses of algae and plants in case of specifying environmental pollutants. In relation to the application of the biological amplification mechanism, survey was carried out on environmental stress signals sent from plants, selection of environmental stress index plants, detection of environmental pollutants using bacteria, high sensitivity detection using animal (nematode), etc. Concerning the standardization of the environmental measuring technology by the application of ecosystem information functions, survey was conducted on artificial molecular recognition sensor, antibody device sensor, biochips, system construction, etc. (NEDO)

  19. FY 1974 report on the results of the Sunshine Project. Comprehensive study of hydrogen use subsystem and study on the periphery technology (Investigational study on the hydrogen production method by the quinone method); 1974 nendo suiso riyo subsystem no sogoteki kento to shuhen gijutsu ni kansuru kenkyu seika hokokusho. Kinonho ni yoru suiso seizoho ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1975-05-01

    This is aimed at making an investigational study on the hydrogen production from water by means of quinone compounds. The paper studied a preparation method in case of using n-TiO2 photosemiconductor and p-GaAs and Gap photosemiconductor to photoelectrode as catalysts of this reaction. The reaction from p-benzoquinone to p-hydroquinone by reaction with H2O were studied in terms of photochemical reaction, and light reaction/dark reaction of photosemiconductor electrode. As a result, it was found out that this reaction easily advances by the photochemical reaction by solar light, and also that it advances by the counter electrode Pt electrode reaction in the water electrolysis of n-TiO2 photosemiconductor electrode. The H2 production reaction from p-hydrogquinone was studied in terms of the photochemical reaction, photosemiconductor electrode reaction, and effects of the catalysis of electron transport of metal salts, methylviologen, etc. As a result, in the n-TiO2 photosemiconductor electrode reaction, H2 formation was not as great as it can be confirmed. However, it was found that p-hydroquinone can produce H2 under the existence of methylviologen or Fe salts. (NEDO)

  20. Leading research for fiscal 1998 on innovative technology for the earth. Researches on technologies for creating ecology using ecosystem's information transmitting function; 1998 nendo chikyu kankyo sangyo gijutsu ni kakawaru sendo kenkyu. Seiteikei joho kino oyo ni yoru kankyo sozo gijutsu ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    The aim is to develop a technology for detecting environmental pollution before it becomes apparent and thereby to contribute to the development of technologies to minimize the damage that may be inflicted upon the global environment. For this purpose, researches are conducted in search of techniques to detect, at high speed with high sensitivity over a wide scope, the response of living organisms to chemicals. In a research on the application of the reaction of ecosystem to environmental stress, communication between living organisms in coping with environmental chemicals is investigated. It is then found that the growth of vegetable roots may be used as a measure for the detection of environmental pollutants but that the method is too low in sensitivity. A research is conducted on the creation of an ecological reporter function using the biological amplification technique. It is then found that the immunoreaction-aided measuring of environmental pollutants yields an excellent result in terms of sensitivity but that it has a problem in its resistance to environmental conditions. In a research on the standardization of environmental measurements using ecological information, it is found that the primary object of research and development should be a systematization technology compatible with biological functions. (NEDO)

  1. Leading research for fiscal 1998 on innovative technology for the earth. Researches on technologies for creating ecology using ecosystem's information transmitting function; 1998 nendo chikyu kankyo sangyo gijutsu ni kakawaru sendo kenkyu. Seiteikei joho kino oyo ni yoru kankyo sozo gijutsu ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    The aim is to develop a technology for detecting environmental pollution before it becomes apparent and thereby to contribute to the development of technologies to minimize the damage that may be inflicted upon the global environment. For this purpose, researches are conducted in search of techniques to detect, at high speed with high sensitivity over a wide scope, the response of living organisms to chemicals. In a research on the application of the reaction of ecosystem to environmental stress, communication between living organisms in coping with environmental chemicals is investigated. It is then found that the growth of vegetable roots may be used as a measure for the detection of environmental pollutants but that the method is too low in sensitivity. A research is conducted on the creation of an ecological reporter function using the biological amplification technique. It is then found that the immunoreaction-aided measuring of environmental pollutants yields an excellent result in terms of sensitivity but that it has a problem in its resistance to environmental conditions. In a research on the standardization of environmental measurements using ecological information, it is found that the primary object of research and development should be a systematization technology compatible with biological functions. (NEDO)

  2. BTX production by in-situ contact reforming of low-temperature tar from coal with zeolite-derived catalysts; Zeolite kei shokubai wo mochiita sekitan teion tar no sesshoku kaishitsu ni yoru BTX no seisei

    Energy Technology Data Exchange (ETDEWEB)

    Matsunaga, T.; Fuda, K.; Murakami, K.; Kyo, M.; Hosoya, S.; Kobayashi, S. [Akita University, Akita (Japan). Mining College

    1996-10-28

    On BTX production process from low-temperature tar obtained by pyrolysis of coal, the effect of exchanged metallic species and reaction temperature were studied using metallic ion-exchanged Y-zeolite as catalyst. In experiment, three kinds of coals with different produced tar structures such as Taiheiyo and PSOC-830 sub-bituminous coals and Loy Yang brown coal were used. Y-zeolite ion-exchanged with metal chloride aqueous solution was used as catalyst. Zn{sup 2+}, Ni{sup 2+} and In{sup 3+} were used as metal ions to be exchanged. The experiment was conducted by heating a pyrolysis section up to 600{degree}C for one hour after preheating a contact reforming section up to a certain proper temperature. As a result, the Ni system catalyst was effective for BTX production from aromatic-abundant tar, while the Zn system one from lower aromatic tar. In general, relatively high yields of toluene and xylene were obtained at lower temperature, while those of benzene at higher temperature. 4 figs., 1 tab.

  3. Formation of fine aggregate structure by solid-state displacement reaction of Ti with CoO or NiO. CoO oyobi NiO to Ti kan no koso chikan hanno ni yoru bisai fukugo soshiki no seisei

    Energy Technology Data Exchange (ETDEWEB)

    Taimatsu, H; Kaneko, H [Akita Univ., Akita (Japan). Mining College; Wada, K [Akita Univ., Akita (Japan). Graduate School

    1992-09-20

    As a result of search for systems which have aggregate structures, the displacement reaction products of Ti with CoO or NiO are found to have aggregate structures in which the produced oxides and metals are entangled with each other. The displacement reaction of Ti with CoO or NiO is investigated at the temperature of 1273K. In the reaction of either couple, aggregate products are produced, and reacted layer is observed in the TiO2 matrix wherein Co or Ni phases are three dimensionally entangled in finely dispersed state of micron order. 2 layers of cavitated and dense TiO2 layers are found in the reacted layer. The thicknesses of the reacted layer are not constant according to locations, but thick portions are grown obeying the parabolic rate law. As a result of the study on the possibility of fabricating cermet by the reaction between powders, finely mixed characteristic structures are found to be easily obtained using systems which can produce aggregate structures. 24 refs., 9 figs.

  4. Design of environment-friendly and next generation-type conversion system for unused carbon resources by developing highly functional materials; Kokino zairyo kaihatsu ni yoru kankyo chowagata jisedai miriyo tanso shigen tenkan system no kochiku

    Energy Technology Data Exchange (ETDEWEB)

    Wakabayashi, K; Morooka, S; Arai, Y [Kyushu University, Fukuoka (Japan). Faculty of Engineering; Sakanishi, K [Kyushu University, Fukuoka (Japan). Institute of Advanced Material Study

    1997-02-01

    Studies are conducted for the development of now-unused kinds of fossil carbon resources, such as low rank coal and heavy gravity crude oil, into higher-value liquid fuel. In the preliminary treatment process, the fossil carbon resources are dried by use of supercritical carbon dioxide, when it is found that the resources are disintegrated and water is desorbed. In a low rank coal liquefaction process using the NiMo/KB (Kefjen Black) catalyst, more than 60% is converted into oil, which rate is improved by use of the dual-temperature liquefaction process. This catalyst may be recovered by separation utilizing specific gravity difference. As a low temperature gasification catalyst, the alkaline carbonate-carried carbon catalyst is very quick at the initial stage of reaction. The perovskite-carried alkaline carbonate catalyst is high in carbon oxidizing/activating efficiency at low temperatures. The silica film deposited on an alumina-coated support tube is excellent in selectivity and speed as a hydrogen separating film, and a carbonized polyimide film as a carbon dioxide separating film. For the supercritical phase adsorption/separation of chemicals not to be distilled easily, the NaY-type zeolite functions effectively. Pd/ZrO2 serving as a carbon monoxide conversion catalyst enables the recovery of more MeOH when Pd grains are smaller in diameter.

  5. FY 1997 report on the study on cryogenic aggregate target PLD process by multi-laser excitation for using gaseous materials; 1997 nendo chosa hokokusho (kitai genryo riyo no tame no taju laser reiki ni yoru gokuteion gyoshutai target PLD process ni kansuru kenkyu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    This paper reports the result in fiscal 1995 of the study on PLD (pulse laser deposition) thin film formation process having been made since 1993. In fiscal 1995, the effect of irradiation of excimer laser and YGA(SHG) on ablation of aggregates of N2, CH4, Ar, Kr and Xe, and the effect of time-delayed irradiation of YGA(SHG) and KrF excimer laser on ablation of N2 aggregate were studied aiming at exciting ablation by cryogenic aggregate alone. Experimental results by a newly developed multi-laser excitation experiment equipment are as follows. Ablation was not caused by KrF excimer laser irradiation, while caused by YGA(SHG) irradiation. Ablation was caused by 1mm thick N2 or CH4 aggregate alone. Kr target was the most promising among rare gas solid targets expected as seed of ablation occurrence. Multi-irradiation showed a different ablation behavior as compared with single YGA(SHG) irradiation, and in some cases, multi-irradiation not increased scattering of particles. Time-delayed multi- irradiation (YGA(SHG) excitation after excimer excitation) was effective. 23 figs., 4 tabs.

  6. Fiscal 2000 report of investigation. Research study on reduction of carbon dioxide discharge by increase in octane number in gasoline through use of biomass; 2000 nendo biomass wo riyoshita gasoline no octane ka kojo ni yoru nisanka tanso haishutsu sakugen ni kansuru chosa kenkyu hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    An investigative research was conducted on the means of reducing fuel consumption of motor vehicles and reducing greenhouse effect gases, by making octane boosters for gasoline through the use of alcohol derived from biomass feedstock. As a result of the investigation, the following proposals were made. In present gasoline-fueled motor vehicles, an increase in the octane number by 5 will allow a higher compression by 1, thereby reducing fuel consumption by 2.5% during running. The suitable octane boosters are MTBE (methyl tertiary butylether) and ETBE (ethyl tertiary butylether) both of which can be produced from either methanol or ethanol derived from biomass feedstock. Blending regular gasoline with an octane number of 90 and either MTBE or ETBE by 18% may make gasoline having an octane number of 95, leading to a reduction of carbon dioxide emission by 4.8% and 6.8% respectively. The amount of alcohol needed for these octane boosters is 2.2 megatons of methanol per year for MTBE production and 2.7 megatons of ethanol per year for ETBE; this requires 12 plants nationwide for producing the octane boosters at 0.5 megatons per year; and, in view of the cost of transportation, alcohol producing plants are desirably located near the octane booster producing plants. (NEDO)

  7. Feasibility study of international cooperation in the research/development of a solar energy utilization system by the innovative solar thermochemical process; Kakushinteki solar netsukagaku process ni yoru taiyo energy riyo system no kaihatsu kenkyu ni kakawaru kokusai kyoryoku kanosei chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    At COP3 in 1997, an agreement was made to the innovative technical development/promotion by international cooperation, and the promotion of transfer of environmental technology to developing countries. Under the agreement, a feasibility study of international cooperation was made, and especially a study was conducted of the utilization/development of solar energy by the innovative solar thermochemical process. The main reason for global warming is emissions of a large amount of CO2 caused by the direct combustion of fossil fuels. Therefore, a CO2 recycle system taken up in the study enables a more substantial decline in CO2 emission (kg/kWh) per unit generation than the conventional thermal power system by composing solar methanol or solar dimethyl ether using fossil fuels including coal, water, CO2, etc. as raw materials and using solar energy as heat source, and by using this as fuel (solar fuel). CO2 can be reduced by 13% to 14% by substituting solar methanol or solar dimethyl ether produced from petroleum/methane equivalent-mol mixed raw materials for the equivalent mol coal and natural gas of the thermal power plant (CO2 recovery is not necessary). 34 refs., 47 figs., 34 tabs.

  8. FY 1997 report on the study on lamination control technology for functional multi-element oxide thin films by complex beam epitaxy (CxBE) process; 1997 nendo chosa hokokusho (sakutaisen epitaxy (CxBE) ho ni yoru kinosei tagenso sankabutsu usumaku no sekiso seigyo gijutsu ni kansuru kenkyu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    Complex beam epitaxy (CxBE) process was proposed and demonstrated as new deposition process of multi-element oxide thin films. This process radiates excimer laser onto a metal complex target of ethylenediamine-tetraacetate complex under reduced pressure oxygen atmosphere condition in a reaction vessel to supply raw material onto a heated substrate. This process allowed deposition of YBCO123 phase hetero-epitaxial film onto a single-crystalline SrTiO3 substrate. This process was proved to be promising through study on crystal orientation, composition transcription and surface smoothness of the obtained oxide thin films. In addition, epitaxial ZnO film was also deposited onto a single crystalline Al2O3 substrate by this process. The relation between the obtained film and substrate epitaxy was examined, and photoluminescence of specimens was measured by triple wave of Nd:YAG laser. As a result, it was clarified that the epitaxial ZnO film prepared by this process is useful as laser material. 60 refs., 48 figs., 5 tabs.

  9. FY 1999 report on the results of the investigational study on the promotion of application of aluminum materials to automobiles by the development of low-cost aluminum materials and aluminum resource recycling technology; 1999 nendo tei cost aluminium zai oyobi arumi shigen junkan gijutsu no kaihatsu ni yoru jidosha eno aluminium zai tekiyo suishin ni kansuru chosa kenkyu hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    Presently, the aluminum demand in Japan is approximately 3.8 million tons, and the aluminum discharged as scrap reaches approximately 1.7 million tons/year. Out of the discharged scrap, 54% is recovered as the secondary metal, and the rest, 0.77 million tons, is not recovered and dumped for land reclamation. In future, if the present cascade type recycling goes on, it is predicted that a gap between supply and demand of about 0.5 million tons will arise. To cope with this problem, the following are the measures to be taken : 1) development of the technology to promote the use of recycled aluminum metal for automobiles in which a lot of aluminum is most likely to be used because of the increasing fuel consumption, etc. 2) establishment of a recycling system by which the waste sash discharged in quantity from the construction field is again used as sash. From the two points of view, which are needed in the case of using a lot of aluminum for automobiles, the heightening of competitiveness in the aluminum industry and the recycling in which the aluminum expanded materials used for automobiles are efficiently recycled as expanded materials in the recycling economic system, this survey extracted problems and made proposals, overlooking the state of the aluminum use in automobiles, state of the treatment of used cars, state of manufacturing/processing technology of aluminum products. (NEDO)

  10. Fiscal 1997 survey of overseas coal import base arrangement and promotion. Effects of the expansion of coal trade by IPP on the supply/demand of general coal in Asia; 1997 nendo kaigaitan yunyu kiban seibi sokushin chosa. IPP ni yoru sekitan boeki no kakudai ga Asia no ippantan jukyu ni oyobosu eikyo

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    In consideration of the coal situation in the Asia/Pacific region, a study was made of effects of the expansion of coal trade by IPP on supply/demand of general coal in Asia. When aggregating increases in demand of general coal for electric power use in ten Asian counties, they will be an increase of 130.75 million tons in 2005 over 1997. Fifty nine percent of it is equivalent to the increase by IPP and exceeds the demand expanded by electric utilities operators. Further, a possibility is predicted of contracts and coal quality being different from until now. However, there will be a lot of cases in which plans of constructing power plants in Asia are not so developed as expected except Japan, Korea and Taiwan, and also the effect of the currency crisis starting in Thailand largely affects. In terms of the coal supply, countries which export general coal are only China and Indonesia. Indonesian coal is expanding its production and export rapidly and remarkably. The environmental control in Asia has been tightening, and the fuel selected by IPP is mainly coal rather than natural gas. 40 refs., 94 figs., 179 tabs.

  11. Subsidy project in fiscal 1999 to accelerate forming an environment harmonizing energy community. Report on the survey on energy supply investigation project by using a wastes electric power generation system in wide city and village area in the Joso area; Joso chiho koiki shichosonken ni okeru haikibutsu hatsuden ni yoru energy kyokyu chosa jigyo hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    Discussions were given on the feasibility of a project to be performed jointly by the Business Bureau of the Ibaraki Prefectural Government who takes charge of the wastes electric power generation project, and the Joso Area Wide City and Village Area Affair Association who performs refuse disposal project. The basic plan for the system may be summarized as follows: the gasification melting furnace shall have a capacity of 420 tons per day, discharge concentrations of dioxins shall be 0.01 ng-TEQ/m{sup 3} or less, the power generation system shall be the steam high-temperature high-pressure system, the power generation efficiency shall be 25%, and the electric power generation takes priority, with the steam after power generation use utilized for heat supply. The evaluation on the effect of introducing the project can be summarized as follows: in the social aspect, the execution of the joint project is safe and effective for the residents and society; it contributes to activation of the areas and assistance to the regional activities; correspondence will be possible to the tighter enforcement of the laws and regulations in the future; in the environmental aspect, discharge of carbon dioxide, sulfur oxides, and dioxins can be suppressed; and in the economic aspect, the ultimate disposal quantity in refuse treatment will be reduced greatly, serving for saving the treatment expense, and the refuse treatment cost may be reduced by assuring the earning from selling the electric power. (NEDO)

  12. FY 1999 report on the results of a feasibility study on a system for producing useful chemical substances by utilizing CO2-containing natural gas fields. II; 1999 nendo CO{sub 2} gan'yu tennen gas den katsuyo ni yoru yuyo kagaku busshitsu seizo system donyu kanosei ni kansuru chosa kenkyu. 2

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    The paper studied the solar energy use methanol synthesis using CO2 as raw material in the natural gas field with which a large quantity of CO2 is associated. This is a report on the FY 1999 survey. It was found that comparatively many natural gas fields containing CO2 exist also in Asia/Oceania regions. It was also found that when considering the climate and the transportation to Japan, Australia has more advantages in terms of the effective desert area, etc. and is the best site for solar system construction. Various solar concentrating/collecting methods now under development are roughly viewed to extract characteristics and developmental conditions. As to the reforming reaction furnace, it is necessary not only to absorb the world technology, but to develop Japan's original one. The conceptual design and assessment of the system were conducted. About the associated CO2, a limit of the concentration for use was estimated at 25%. In the study of elements of system structure, examined was the thermally combined simulation of heat flow and chemical reaction in the solar heat reaction furnace, and simple models were calculated and subjects were extracted. In a comparison with the conventional methanol synthesis method, this system was found to be excellent in conservation of fossil fuel resources and reduction in CO2 emissions. (NEDO)

  13. Ultrasound imaging with a micromotor; Micromotor ni yoru choonpa imaging

    Energy Technology Data Exchange (ETDEWEB)

    Oshiro, O.; Salimuzzaman, M.; Matani, A.; Chihara, K. [Nara Institute of Science and Technology, Nara (Japan); Asao, M. [Osaka National Hospital, Osaka (Japan)

    1998-03-01

    This paper describes a new ultrasound intravascular imaging system. In this system, an ultrasound probe consists of a micromotor, an ultrasound reflecting mirror attached with the micromotor and an ultrasound transducer. Ultrasound is scanned radially by a micromotor instead of a rotation transmitting wire and the rotation of the micromotor is performed and controlled by an external magnetic field. This ultrasound imaging system with a micromotor was applied to observe the inside of blood vessels through in vitro experiments. The preliminary results suggest that this system has the sufficient ability to define the blood vessel morphology and that the simple image processing enhances signal-to-noise ratio of the reconstructed image. 12 refs., 5 figs.

  14. Laser beam cutting method. Laser ko ni yoru kaitai koho

    Energy Technology Data Exchange (ETDEWEB)

    Kutsumizu, A. (Obayashi Corp., Osaka (Japan))

    1991-07-01

    In this special issue paper concerning the demolition of concrete structures, was introduced a demolition of concrete structures using laser, of which practical application is expected due to the remarkable progress of generating power and efficiency of laser radiator. The characteristics of laser beam which can give a temperature of one million centigrade at the irradiated spot, the laser radiator consisting of laser medium, laser resonator and pumping apparatus, and the laser kinds for working, such as CO{sub 2} laser, YAG laser and CO laser, were described. The basic constitution of laser cutting equipment consisting of large generating power radiator, beam transmitter, beam condenser, and nozzle for working was also illustrated. Furthermore, strong and weak points in the laser cutting for concrete and reinforcement were enumerated. Applications of laser to cutting of reinforced and unreinforced concrete constructions were shown, and the concept and safety measure for application of laser to practical demolition was discussed. 5 refs., 8 figs.

  15. Environment purification using microorganisms. Biseibutsu ni yoru kankyo joka

    Energy Technology Data Exchange (ETDEWEB)

    Tanaka, H [Asahi Glass Co. Ltd., Tokyo (Japan); Harada, S

    1993-12-01

    Technologies to purify polluted soils vary with kinds of pollutants, spread of pollution, and shapes of water veins. A method is used often that several wells are drilled in a polluted area, and water is circulated between upstream wells and downstream wells, where activities of microorganisms living in that particular environment are utilized to biodegrade the pollutants. This technology is called bioremediation. This paper deals with soil pollution by chemical substances, and describes development of a technology to remove pollution caused by PCB and petroleum which is thought difficult to apply the bioremediation technology among environment purifying technologies using microorganisms. The bioremediation of petroleum pollution assumes petroleum pollution on seashores. Discussions have been given on separation from sea water of petroleum decomposing microorganisms to be used in the bioremediation, and the number of petroleum decomposing bacteria in seas near Japan. As a result, it was made clear that a few kinds of bacteria will suffice for decomposition of main components in a mixture as complex as petroleum. 5 refs., 4 figs.

  16. FY 2001 report on the results of the survey of the formation promotion subsidy project on the environmentally friendly type energy community. Survey of the commercialization of high efficiency power generation using fuel of waste such as waste construction materials; 2001 nendo kankyo chowa gata energy komyuniti keisei sokushin hojo jigyo. Kensetsu haizai tou haikibutsu nenryo ni yoru kokoritsu hatsuden no jigyosei chosa chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-03-01

    The paper studied a system for power generation and heat utilization using wood chips such as waste construction materials, used paper inappropriate for recycling and plastic refuse from neighboring local governments as fuel and assessed a potentiality of the commercialization. As to the system, the following were conducted: selection of the optimum combustor in the waste power generation, survey of the state of corrosion of boiler tube in the steam conditions and waste properties, selection of the optimum quality of boiler materials, etc. In the assessment of a potentiality of the commercialization, the commercialization was studied as in-house power generation/heat utilization business with a power generation scale of 9,950kW and a steam supply scale of 31.5t/h. As a result of the study, the energy conservation effect was found to be expected as follows: reduction of 33,000kL/y crude oil equivalent and reduction of 16,000t-CO2/y emission. As a result of studying the economical efficiency of business, the unit price of wood chip purchase and the unit price of waste plastic treatment which are required to recover the difference of the initial investment within 5 years were greatly different from the level as an aim. For the realization as business, a subsidy of 15% and more cost reduction were requested. (NEDO)

  17. FY 2000 report on the basic survey to promote Joint Implementation, etc. Energy conservation by modernization of a cement plant (Double Horse Cement Co.) in China; 2000 nendo kyodo jisshi nado suishin kiso chosa hokokusho. Chugoku cement kojo (Double Horse Cement) kindaika ni yoru sho energy

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    An investigational study was conducted of possibilities of energy conservation and greenhouse effect gas emission reduction in the cement production process of Double Horse Cement Co., Mianyang City, Sichuan Province, China. Double Horse Cement adopts the wet type long kiln production system and has a production ability of approximately 1.5 million t/y. In the project, as to three production lines out of the six production lines, improvement was planned to be made of the technologies on the following: mixing of raw materials, grinding of raw materials, NSP, clinker cooler, clinker pre-grinder, high-efficiency separator, waste heat use power generation, etc. As a result of the study, it was found that the energy conservation amount obtained was 54,646 toe/y. And, the amount of greenhouse effect gas reduction was 169,086 t-CO2/y. The total fund required for this project was approximately 5.553 billion yen and the internal earning rate was 7.36% after tax. When the project is carried out, expenses vs. effects are 9.8 toe/million yen in energy conservation amount and 30.4 t-CO2/million yen in greenhouse effect gas reduction. (NEDO)

  18. FY 2000 report on the study of energy conservation by industrial field recycling of global warming gas as a policy for the global environmental problem and the survey of international cooperation application; 2000 nendo chikyu kankyo mondai taisaku to shite no ondanka gas no sagyo bun'ya recycle ni yoru sho energy ka kento to kokusai kyoryoku tekiyo chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    In this report, for Japan and typical developing countries and for the CO2 emitted from the combustion process of the fixed type exhaust source which is easy in recovery, technical problems and economical problems were made clear in case of using the recovered CO2 for the industrial field, and at the same time, effects of the energy conservation were studied. As to CO2, the two methods were considered: a method to use the recovered CO2 as it is and a method to use the carbon compound obtained by reducing CO2 by any method. Further, in the industrial field, there are a lot of industries which use CO2, carbon, methanol, etc., and in the present situation fossil fuel is used for production materials such as CO2, carbon and methanol. As substitutes for fossil fuels for the industries using these hydrocarbons as raw material, the use of the recovered CO2 and the synthesized hydrocarbon was considered. And, survey was made of the applicable industrial fields, the amount of the recovered CO2 use there, and effects of energy conservation by reduction in amount of the fossil fuel use. (NEDO)

  19. Report on survey for high-performance industrial furnace introduction field test project in fiscal 1999. Verification work on achievements of industrial furnace development in 1999 by using theoretical method; 1999 nendo koseino kogyoro donyu field test jigyo chosa hokokusho. 1999 nendo koseino kogyoro kaihatsu seika no rironteki shuho ni yoru kakusho gyomu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    The high-performance industrial furnace introduction field test project has been executed from fiscal 1998 through fiscal 2000. Fiscal 1999 has performed measurements, evaluations, analyses, and follow-ups on representative demonstration furnaces, subsequently from fiscal 1998. At the same time, theoretical discussions were given to understand the details of the achievements. The measurements and investigations on the representative demonstration furnaces verified remarkable enhancement in the waste heat recovery rate, and noticeable reduction in the fuel unit requirement. In order to understand in-furnace phenomena and heat conduction mechanisms, simulations were made on combustion gas flows, combustion reactions, and heat conduction by using three-dimensional and non-steady state continuous analyses. The method used is an effective method to elucidate the in-furnace gas temperature distribution in terms of space and time, and evaluate the heat conducting performance quantitatively. The result obtained in the current fiscal year on the overall heat absorption rate was found to be about the same value as for conventional furnaces. The temperature efficiency calculation value for the heat recovering device was 90 to 95%, which is much higher than that for the conventional furnaces of 30 to 60%. The calculation value for the fuel unit requirement was also reduced by 20 to 30% from that of the conventional furnaces. The simulation result is effective in understanding the heat conduction performance enhancing mechanism, having been supplemented by the measurements. (NEDO)

  20. FY 2001 new energy vision of the Kin Town area. Initial stage survey. Town with plenty of heart, happiness, good living environment and vitality in harmony with nature; 2001 nendo Kin cho chiiki shin energy vision shoki dankai chosa. Shizen to no chowa ni yoru kokoro yutaka de akaruku sumiyoi katsuryoku aru machi

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-02-01

    For working out a new energy vision in Kin Town, Okinawa Prefecture, study as an initial stage survey was conducted of the state of energy supply/demand of the town, existence amount of new energy, possibility of new energy introduction, etc. The energy consumption amount of Kim Town was estimated at 10.71 x 10{sup 10} kcal/y. By sector, it consisted of 5.10 x 10{sup 10} kcal in the transportation sector, 3.51 x 10{sup 10} kcal in the commercial/residential sector and 1.66 x 10{sup 10} kcal in the industrial sector. The rate of energy source was 55.3% of petroleum-base fuel, 40.6% of electric power and 4% of LP gas. The existence amount of new energy was estimated at 39,373 MWh, which is equivalent to 77.8% of the electric power consumption amount of the town. The existence amount of new energy is broken down into 31.4% of wind power generation, 30.3% of solar energy, 12.5% of photovoltaic power generation, 3.0% of waste utilization, etc. As to the program assuming the new energy introduction, a lot of themes were cited such as the introduction of photovoltaic power generation/wind power generation to around the hog raising complex, utilization of wind power/biomass energy in the stockbreeding industry and introduction of hybrid car to official vehicle. (NEDO)

  1. Actual situation investigation utilizing a crude oil tanker for the air pollution in the Persion Gulf due to Kuwaiti oil field fire. Gen'yu tanker wo riyoshita Kuwait yusei kasai ni yoru Perushawan no taiki osen no jittai chosa

    Energy Technology Data Exchange (ETDEWEB)

    Tanaka, S. (Keio University, Tokyo (Japan). Faculty of Science and Technology)

    1992-01-10

    Very serious air pollution was brought about by the fire in oil fields at the end of February, 1991 after the Middle East Gulf War had come to an end. The present report explained the investigation result of actual air pollution situation obtained through measurement by implements mounted on board of the Japan Violet, crude oil tanker which made navigation in the Persian Gulf from 17 to 29 August, 1991. Non-marine salinity sulfate and nitrate in the dust particulates which are representative substances for the air pollution were 10.5 and 3.7[mu]g/m[sup 3], respectively in mean atmospheric content. Such a content level was nearly equal to that in the air-polluted land area and very high for the offshore air. It is judged to be resultant from the particulate formation of non-marine salinity salt from SO2 and NOx which were abundantly emitted, dispersed in the Persian Gulf and oxidized. However as a result of the neutralization by Ca contained in high content sanddust in the atmosphere of the Persian Golf, the acidity of sanddust was not so high. 7 refs., 8 figs., 1 tab.

  2. Fiscal 1994 survey of the base arrangement promotion for foreign coal import. Project to heighten the quality of subbituminous coal by low temperature carbonization process; 1994 nendo kaigaitan yunyu kiban seibi sokushin chosa. Teion kanryuho ni yoru arekiseitan no kohinshitsuka jigyo

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-03-01

    The low-temperature carbonization process of coal is a technology to produce high grade reformed coal corresponding to bituminous coal and coal oil corresponding to heavy oil from subbituminous coal and supply them at prices close to the present market ones. From viewpoints of diversified sources and multiple export harbors, an initial-stage survey was conducted of the whole flow from new development of undeveloped mining areas in the northwest of Sumatra, Indonesia to bringing by ships to Japan of products reformed by LFC process of the US SGI`s low-temperature carbonization technology. Clean coal prepared after mining is produceable at a little higher than $12. At processing ability of 10,000 tons/day of raw coal, production is expected of approximately 5,700 tons/day of solid products of more than 6,500 kcal/kg and approximately 1,000 tons/day of low sulfur C heavy oil class oil. The finished cost of solid products is about $25/ton, which becomes about $40/ton at the harbor price in Japan. In conclusion, the project to enhance the quality of subbituminous coal by the low-temperature carbonization is promising as a total system. 10 refs., 54 figs., 30 tabs.

  3. Fiscal 1999 report on basic research for promotion of joint implementation programs. Research on potential for higher energy efficiency through instrumentation, control, and energy saving equipment (Research report); 1999 nendo keisoku seigyo oyobi sho energy kiki ni yoru sho energy potential chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    As part of the 'clean development mechanism (CDM)' activities to be conducted by advanced nations jointly with developing nations, a survey is conducted of potential for higher energy efficiency, the effect of greenhouse gas reduction, and the effect of related investments in Egypt's textile (dyeing) industry. As the result, it is found that the Egyptian textile (dyeing) industry is rich in potential for higher energy efficiency and that intensification of energy management with importance attached to instrumentation will be quite effective. Private plants, though small in scale, enjoy a high operating rate and are full of life. As for their energy management, however, though management oriented instrumentation is found to stay without being scattered or lost in case of newly introduced equipment, normal operation is impeded by damaged parts which are not duly repaired or replaced. As for state operated plants, they are large in scale and are provided with some leading-edge facilities. Many of them are obsolete, however, and a privatization plan is under consideration, these discouraging investors and reducing vitality. Operation control or quality control are not sufficiently practiced in the administration of plants, and they need improvement. (NEDO)

  4. Development of new supervisory system with ITV. ITV ni yoru kanshi system ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Shimonaga, S; Matsunaga, R; Ono, H [The Kyushu Electric Power Co. Inc., Fukuoka (Japan)

    1994-02-28

    This paper describes an automatic trespassing supervisory system with ITV and picture processing (PP). The paper details an integrated control system and automatic supervision. The system functions to automatically detect a trespassing by means of PP, transfers items of information collected by sensors to a remote control center, and records relevant data. The operation principle consists of measurement of change in two or more images of moving bodies with binary value at a certain interval, determination on acceptability of the moving bodies represented by human characteristics, and identification of a trespasser. The system consists of an automatic supervisory device using PP and an automatic patrolling and searching device by means of sensor measurements. The supervisory device has images outputted from ITV and VTR processed by PP, host computer, and HD, and linked to an indication mechanism. According to the result of a site test at wireless transmission station of Kyushu Electric Power Company, the difference between measurement values collected by the searching device and those by the supervisory device was [plus minus]3% or less (other than EG output current), which is a useful value for verification. Although the basic technique has been established, practical use of the system still has some problems including performance improvement in picture processing. 37 refs., 38 figs., 18 tabs.

  5. Fiscal 1999 basic survey report for promotion of joint implementation. Basic survey for promotion of joint implementation (Feasibility study about CO2 emission reduction by introducing energy-efficient facilities into three leading paper and pulp plants in the Philippines); 1999 nendo Philippines kami pulp shuyo 3 kojo eno sho energy setsubi donyu ni yoru CO{sub 2} haishutsu sakugen ni kansuru FS chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    A feasibility study is conducted on the assumption of introducing Japan's energy-saving technology into three leading paper and pulp plants in the Philippines for a reduction in greenhouse gas emissions. In the future, the effort will be associated with the clean development mechanism (CDM). The three target plants are TIPCO (Trust International Paper Corporation), UPPC (United Pulp and Paper Co., Inc.), and CCP (Container Corporation of the Philippines). The energy-saving facilities to be installed involve energy-efficient screens, variable-speed motors, conversion of winder unwinding sections into rheostatic brakes, hermetic design for dryer hoods, exhaust heat recovery facilities, etc. A study of the plant and equipment investment standards of the respective corporations indicates that energy-saving alone will not realize a full payback. It will be necessary, therefore, to have the project implemented as a CDM activity for a transfer from the Philippines of some CO2 emission reduced amount credit for Japan to bear a part of the necessary funds. Since the CDM framework and the value of reduced amount credit are not clear at the current stage, negotiations will have to be furthered about Japan's share of funds etc. as soon as the situation becomes clear. Since the Philippine Government is not well-disposed towards CDM, there is no possibility that this project will be approved as a CDM effort. (NEDO)

  6. Achievement report for 1st phase (fiscal 1974-80) Sunshine Program research and development - Hydrogen energy. Research on transportation of hydrogen in the form of metallic hydride; 1974-1980 nendo kinzoku suisokabutsu ni yoru suiso no yuso gijutsu no kenkyu seika hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1981-03-01

    This report concerns the transportation and storage of hydrogen using metallic hydrides that perform absorption and desorption of hydrogen. Alloys useable for this purpose have to be capable of reversibly absorbing and desorbing hydrogen within a certain temperature range. In the absence of guidelines to follow in the quest for such alloys, the efforts at discovering them turned out to be a continual series of trials and errors. Researches were conducted into the hydrogenation reaction of Mg and Mg-based alloys and into hydrides of V-based alloys, and into Zr-based alloy hydrides such as the ZrMn{sub 2} hydride, ZrNiMn hydride, Zr(Fe{sub x}Mn{sub 1-x}){sub 2} hydrides, TiZrFe{sub 2} hydride, Zr{sub x}Ti{sub 1-x}(Fe{sub y}Mn{sub 1-y}) hydrides, etc. Also studied were the electronics of hydrogen in metallic hydrides, rates of reaction between Mg-Ni-based alloys and hydrogen systems, endurance tests for hydrides of Mg-Ni-based alloys, effects exerted by absorbed gas molecules during the storage of hydrogen in Mg-Ni-based alloys, effective thermal conductivity in a layer filled with a metallic hydride, metallic hydride-aided hydrogen transportation systems, chemical boosters, etc. (NEDO)

  7. Achievement report on research and development in the Sunshine Project in fiscal 1980. Research on a hydrogen manufacturing technology by using thermo-chemical method. (Research on equipment materials for iodine system cycle); 1980 nendo netsukagakuho ni yoru suiso seizo gijutsu no kenkyu seika hokokusho. Yosokei cycle no sochi zairyo no kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1981-03-01

    This paper describes research on materials of equipment for the second stage reaction in relation with development on a hydrogen manufacturing technology by using the iodine system cycle in the thermo-chemical method. The second stage reaction produces MgO, I{sub 2} and O{sub 2} by decomposition of Mg(IO{sub 3}){sub 2} at 600 to 650 degrees C. Corrosion tests were carried out by using 25Cr-20Ni steel and Ni-50Cr alloy having shown relatively high corrosion resistance in the researches to date, which were added with trace amount of different alloy elements. The tests were performed in gas mixture of I{sub 2}, O{sub 2} and H{sub 2}O at 600 to 700 degrees C for 48 to 192 hours. The average corrosion rate of 25Cr-20Ni steel was reduced by adding Y(0.2%), Ca (0.2%) or Si+Al (1%Si+1%Al), by which relatively uniform corrosion pattern was shown, and the corrosion resistance was improved remarkably. The average corrosion rate of 25Cr-20Ni steel showed a trend of increasing by adding Si and Nb, and non-uniform corrosion like pitting has occurred, revealing that it is not preferable from the aspect of corrosion resistance. The average corrosion rates of the tested materials tended to become somewhat greater under heat insulated condition than under continuously heating condition. Effect of Mg(IO{sub 3}){sub 2} deposition is very small. (NEDO)

  8. Achievement report on research and development in the Sunshine Project in fiscal 1979. Research on hydrogen manufacturing technologies (Research on equipment materials for iodine system cycle); 1979 nendo netsukagakuho ni yoru suiso seizo gijutsu no kenkyu seika hokokusho. Yosokei cycle no sochi zairyo no kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1980-03-01

    From among researches on hydrogen manufacturing technologies using thermo-chemistry in the Sunshine Project, discussions were given on equipment materials, with the second-stage reaction in the iodine system cycle as the object. This paper describes achievements in fiscal 1979. The reaction produces MgO, I{sub 2} and O{sub 2} from Mg(IO{sub 3}){sub 2}. Corrosion tests were performed by using test pieces made of Ni alloy, iron-Ni-Cr alloy, Ti alloy, Zr alloy, Nb and Ta. These materials are thought to have excellent corrosion resistance in high temperature gaseous phase composed of iodine, oxygen and water. Corrosion tests were carried out also by using sheet formed test pieces of 24 kinds of alloys and six kinds of commercially available non-ferrous metallic materials in different temperatures and atmospheres, mainly the iodine plus oxygen plus H{sub 2}O mixed gas atmosphere at 600 degrees C. The corrosion resistance of the tested materials can be divided into three ranks. Materials having relatively good resistance were Ni-50Cr alloy and Co group alloy. Materials having good corrosion resistance are very little affected by water content. The higher the temperature, the more the metal corrosivity has increased. Preliminary discussions were given on pipe formability in materials having good corrosion resistance as the equipment piping materials. Their mechanical properties were also tested. This paper also describes corrosion resistance tests under heat transferring condition by using pipe-formed test pieces. (NEDO)

  9. Detection of seismic phases by wavelet transform. Dependence of its performance on wavelet functions; Wavelet henkan ni yoru jishinha no iso kenshutsu. Wavelet ni yoru sai

    Energy Technology Data Exchange (ETDEWEB)

    Zeng, X; Yamazaki, K [Tokyo Gakugei University, Tokyo (Japan); Oguchi, Y [Hosei University, Tokyo (Japan)

    1997-10-22

    A study has been performed on wavelet analysis of seismic waves. In the wavelet analysis of seismic waves, there is a possibility that the results according to different wavelet functions may come out with great difference. The study has carried out the following analyses: an analysis of amplitude and phase using wavelet transform which uses wavelet function of Morlet on P- and S-waves generated by natural earthquakes and P-wave generated by an artificial earthquake, and an analysis using continuous wavelet transform, which uses a constitution of complex wavelet function constructed by a completely diagonal scaling function of Daubechies and the wavelet function. As a result, the following matters were made clear: the result of detection of abnormal components or discontinuity depends on the wavelet function; if the Morlet wavelet function is used to properly select angular frequency and scale, equiphase lines in a phase scalogram concentrate on the discontinuity; and the result of applying the complex wavelet function is superior to that of applying the wavelet function of Morlet. 2 refs., 5 figs.

  10. Achievement report for 1st phase (fiscal 1974-80) Sunshine Program research and development - Hydrogen energy. Research on hydrogen production technology using thermochemical method (Research on iodine-based cycle etc.); 1974-1980 nendo netsukagakuho ni yoru suiso seizo gijutsu no kenkyu seika hokokusho. Yosokei cycle nado no kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1981-03-01

    Iodine-alkaline earth metal (Mg, Ca) cycles are discovered, and the one with Mg is found excellent. The reaction consists of four stages, that is, Stage (1) where 1/5Mg(IO{sub 3}){sub 2}+MgI{sub 2}(aq) is obtained from 6/5MgO+6/5I{sub 2}, Stage (2) where 1/5MgO+1/5I{sub 2}+1/2O{sub 2} is obtained from 1/5Mg(IO{sub 3}){sub 2}, Stage (3) where MgO+2HI is obtained from MgI{sub 2}+H{sub 2}O, and Stage (4) where H{sub 2}+I{sub 2} is obtained from 2HI. Since there is much iodine and water at Stage (1), MgO thrice MgI{sub 2} in mol is added for reforming and concentration. At Stage (4), where the decomposition rate is as low as 17-27% with the equilibrium dissociation reaction proceeding at 300-700 degrees C, hydrogen is selectively separated by permeation through a porous diaphragm for the acceleration of the reaction. As for materials for the device, they are narrowed down to high-priced ones, that is, Ta and Nb for Stage (1), Ni-50Cr for Stage (2), and Mo etc. for Stages (3) and (4). Under the circumstances, a study is started for the development of a chemical vapor plating process which is high in corrosion resistance. Other cycles such as sulfur-based cycles and hybrid cycles are also investigated. (NEDO)

  11. Fiscal 1993 international research cooperation project. Feasibility study of finding out the seeds of international joint research (technology for environmental preservation using biotechnology, technology for effective use of unused hydrocarbon resource, technology for development of environmental harmony type catalyst); 1995 nendo kokusai kyoryoku jigyo. Kokusai kyodo kenkyu seeds hakkutsu no tame no FS chosa (biotechnology ni yoru kankyo taisaku gijutsu, miriyo tanka suiso shigen no yuko riyo gijutsu, kankyo chowagata shokubai kaihatsu gijutsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    This project is aimed at internationally cooperating in the R and D of industrial technology and improving industrial technology of Japan. For it, the following three technologies were investigated: 1) environmental preservation technology using biotechnology, 2) technology for effective use of unused hydrocarbon resource, 3) technology for development of environmental harmony type catalyst. In 1), a survey was conducted of applicability of biological surfactant to prevention measures of pollution by heavy distillate. It showed that part of the biological surfactants is reaching a stage of its being industrially produced by gene recombination bacteria, but as a whole, biosynthetic genes have hardly been elucidated. In 2), a survey of high-grade treatment technology of petroleum coke was made. It pointed out that it is necessary to develop a technology which makes the most of features of petroleum coke and allows defects. In 3), scientists and engineers of Japan and Europe searched for themes on which they can jointly study in the fields of NOx removal catalyst, up-grading of fuel, and development of catalyst combustion of fuel. 287 refs., 136 figs., 128 tabs.

  12. Fiscal 1993 international research cooperation project. Feasibility study of finding out the seeds of international joint research (technology for environmental preservation using biotechnology, technology for effective use unused hydrocarbon resource, technology of solid electrolyte fuel cells for high-efficient electric vehicles); 1993 nendo kokusai kenkyu kyoryoku jigyo. Kokusai kyodo kenkyu seeds hakkutsu no tame no FS chosa (biotechnology ni yoru kankyo taisaku gijutsu, miriyo tanka suiso shigen no yuko riyo gijutsu, kokoritsu denki jidosha no kotai denkaishitsu nenryo denchi gijutsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1994-03-01

    This project is aimed at internationally cooperating in the R and D of industrial technology and improving industrial technology of Japan. For it, the following three technologies were investigated: 1) environmental preservation technology using biotechnology, 2) technology for effective use of unused hydrocarbon resource, 3) solid electrolyte fuel cell (SOFC) technology for high-efficient electric vehicles. In 1), bio-remediation is a choice as the result of trially using technologies for remediation of the environment polluted by pollutant, but it is not a technically completed one, but one which will be improved by trial and error. By the application of gene engineering, the use of gene recombination enables wide spread of decomposition genes. In 2), technical subjects were studied such as superheavy distillate, oil shale, coalhead methane and methane hydrate. In 3), designed were cylinder type and planar type SOFC of 850degC operation and 10kW output. Accumulation and weight of a total SOFC system are 81 liters and 100 kg in cylinder type and 136 liters and 200 kg in planar type. The vehicle can be equipped with the SOFC. 171 refs., 72 figs., 54 tabs.

  13. Air environment purification using photocatalyst. Hikari shokubai ni yoru taiki kankyo joka

    Energy Technology Data Exchange (ETDEWEB)

    Takeuchi, K [National Institute for Resources and Environment, Tsukuba (Japan)

    1993-12-02

    Noticing that metal oxides have photocatalysis for reduction in NOx concentration and examining effects of the TiO2 selected on removal of pollutant, the paper proposes a direct purification method for the air environment. Since TiO2 causes electron excitation meeting near ultraviolet irradiation, it manifests a catalytic function for various oxidation/reduction reactions. Details of the reaction mechanism are unknown, various active oxygen species generated on the surface of TiO2 under light irradiation oxidize NOx and acquire it as nitric acid on the surface. It is found that mixture of activated carbon of low hygroscopicity with TiO2 is effective to prevent a tendency of NO to desorb before NO becomes nitric acid. What 40% of the catalyst with fluorine resin is formed into like a sheet shows a high removal rate even in the amount of ultraviolet irradiation in a winter cloudy day in the wide range of 0.5 - 95.0% of NOx and SO2, and if the photocatalyst is applied to the side wall of city buildings, the NOx concentration is estimated to be reduced by as much as 20%. 5 refs., 3 figs.

  14. Foods hygiene management according to HACCP.; HACCP ni yoru shokuhin eisei kanri

    Energy Technology Data Exchange (ETDEWEB)

    Seki, T [Niigata Enginering Co., Ltd., Tokyo (Japan)

    2000-11-01

    New foods hygiene management system HACCP(Hazard Analysis and Critical Control Point) was explained, which prevents food poisoning. Followings are described; (1) Outline of HACCP, (2) History of HAPPC, (3) Process to perform HACCP, (4) Infrastructure for HACCP, (5) How to promote HACCP, (6) Certification system in Japan. HACCP secures the safety in foods hygiene by making rules of Critical Control Points (CCP) on foods hygiene and by administrating strictly their performance. Details of works, frequency and person in charge of the work and methods to confirm and record the work are prescribed in PP (Prerequisite Program) and SSOP (Sanitation Standard Operation Procedure). (NEDO)

  15. Archaeological prospecting by DEF method; Denkai zansaho ni yoru iseki tansa

    Energy Technology Data Exchange (ETDEWEB)

    Kishikawa, H; Aono, T; Tanaka, T; Mizunaga, H [Kyushu University, Fukuoka (Japan). Faculty of Engineering

    1996-05-01

    A study is made of a newly-developed differential electric field (DEF) method, wherein potentials between potential electrodes equidistant from a current electrode is measured for directly detecting the secondary potential attributable to an anomalous-resistivity body. In this method, a current is fed into the ground from a point source C1, and four potential electrodes, two each on the X-axis and Y-axis, are provided equidistant from the point source C1 for the measurement of the potentials in the directions of X and Y. Numerical experiments and field experiments in a playground were conducted for this DEF method, and it was found that this method is effective in detecting an anomalous-resistivity bodies (ruins, etc.) situated in a homogeneous medium or in a horizontal multi-layer structure, is capable of displaying anomalous vectors enabling the estimation of the direction from the observation point of the anomalous-resistivity body, improves on work efficiency over the conventional mapping method, enables the estimation of the boundary of the anomalous-resistivity body on the basis of the peak of the anomalous electric field residue on the display, and that the obtained data can be easily processed by use of a personal computer on the site. 3 refs., 9 figs.

  16. Characterization of earthquake fault by borehole experiments; Koseinai sokutei ni yoru jishin danso no kenshutsu

    Energy Technology Data Exchange (ETDEWEB)

    Ito, H; Miyazaki, T; Nishizawa, O; Kuwahara, Y; Kiguchi, T [Geological Survey of Japan, Tsukuba (Japan)

    1996-05-01

    A borehole was excavated to penetrate the Nojima fault at the Hirabayashi area, to investigate the underground structures of the fault by observation of the cores and well logging. The borehole was excavated from 74.6m east of the fault surface. Soil is of granodiorite from the surface, and fault clay at a depth in a range from 624.1 to 625.1m. Observation of the cores, collected almost continuously, indicates that the fault fracture zone expands in a depth range from 557 to 713.05m. The well logging experiments are natural potential, resistivity, density, gamma ray, neutron, borehole diameter, microresistivity and temperature. They are also for DSI- and FMI-observation, after expansion of the borehole. The well logging results indicate that resistivity, density and elastic wave velocity decrease as distance from fault clay increases, which well corresponds to the soil conditions. The BHTV and FMI analyses clearly detect the fault clay demarcations, and show that elastic wave velocity and BHTV results differ at above and below the fault. 3 refs., 3 figs.

  17. Seismic traveltime tomography by use of gridpoints discritization; Koshitenho ni yoru danseiha tomography kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Hirai, T; Watanabe, T; Sassa, K [Kyoto University, Kyoto (Japan). Faculty of Engineering

    1996-05-01

    Efforts were made to enhance analytical precision and stabilize the results in seismic traveltime tomography by use of a method wherein the velocity distribution is expressed as a continuous function interpolated by parameters respectively assigned to the gridpoints. In this method, the slowness data are regarded as the parameters respectively assigned to the gridpoints, and the slowness value at a given point is determined after interpolation by the gridpoints surrounding the said point. A method based on the variation principle was used for ray tracing. As the result, it was confirmed that this method determines the ray path and traveltime with high precision. A method of least squares using Lagrange`s multiplier was applied for inversion. Comparison was made between the use of cells and the use of gridpoints in the results of inversions performed for an inclined 4-layer structure model, when it was found that the values involving the boundaries between layers, inclinations of the layers, and velocities of seismic waves are ambiguous with the cells while those with the gridpoints are reconstructed roughly correctly. 5 refs., 7 figs., 1 tab.

  18. Sewage disposal using anaerobic membrane reactor. Kenkiseimaku reactor ni yoru gesui shori

    Energy Technology Data Exchange (ETDEWEB)

    Fujita, Y. (Dic-Degremont Co. Ltd., Tokyo (Japan))

    1991-11-01

    Discussions were given on a small-scale sewage disposal of about bod 200 mg/l, for which no many examples of use have been hitherto available, using a system combining an anaerobic reactor and membrane modules. Experiments had been carried out from 1988 through 1990 as a part of the Aqua-Renaissance Project. The test equipment wza installed in the premises of the Chigasaki Coastal Research Facilities operated by the Ministry of International Trade and Industry, which used sewage flowing from the adjoining sewage treatment plant for the southern area of the Fujisawa City. The test facility consisted of a system comprising a pretreatment facility, SS decomposing reactor, fluid-bed reactor, separation membrane modules, nitrogen removing facility and micro-organism activity measurement. The test facility was constucted assuming a treatment of 10 m{sup 3} a day. The system was divided into a composite system, A system and B system to operate the system in simplified flows. As a result of comparing the composite system, A system and B system, it was found that B system can deal with wider range of disposal for a small-scale sewage treatment of about 1000 m{sup 3} a day. 6 refs., 14 figs., 3 tabs.

  19. Evaluation of environmental impact by LCA method. LCA shuho ni yoru kankyo fuka hyoka

    Energy Technology Data Exchange (ETDEWEB)

    Sakamura, H.; Utsuno, F.; Yasui, I. (The University of Tokyo, Tokyo (Japan). Institute of Industrial Science)

    1994-06-01

    This paper explains the concept, history, and analytic methods of life cycle assessment (LCA), showing its application to beer bottles and cement factories as specific examples. The LCA is a method to calculate substances and energies put into the whole process of production of a product from raw material mining to product wasting and environmental loads emitted therefrom. It also evaluates the result collectively and quantitatively. A first case of the research is reportedly the one performed at Coca-Cola Co., Ltd. in 1969. Full-scale researches have gone forward in European countries in the recent several years, and are progressing to international networks. The analytic methods can be divided largely into an accumulation method to analyze data in each process and add them up, and a method to use an industrial association table. The former method is the most generally used method currently in overseas countries if referred to the LCA. Because the LCA can cause the analytic result and evaluation to vary depending on the purpose, it is important to define the goal, and set the scope. The LCA must develop in the future although it has a number of problems. 10 refs., 5 figs., 2 tabs.

  20. Laser material purification of neodymium. Hikari reiki seiseiho ni yoru neodymium no kojundoka

    Energy Technology Data Exchange (ETDEWEB)

    Ogawa, Y.; Ozaki, T.; Yoshimatsu, S. (National Research Institute for Metals, Tokyo (Japan)); Chiba, K.; Umeda, H.; Saeki, M. (Nippon Steel Corp., Tokyo (Japan))

    1991-05-20

    Selective photoexcitation and photoionization of neodymium atoms were studied basically by using laser. Also, using their properties, feasibility of laser material purification (LPM) technology in gaseous phase was presented. In the selective 3-step ionization, laser beam with two kinds of proper wave length causes resonance exitation of the target element, which goes up to the excitation level of the first step, and the element is ionized by the second laser beam and the third laser beam. The 3-step ionization scheme by a single wave length laser beam of 577.612nm was used for the ionization of Nd. Nd ionized selectively by laser beam was recovered as thin layer at the negative potential side of plane electrodes placed at both sides of the laser irradiation area. In the layer formed by the TPD technology with this scheme, it is possible to decrease impuritis such as Pr by 1/16 and to form highly purified thin layer. 13 refs., 12 figs., 1 tab.

  1. Surface photo reaction processes using synchrotron radiation; Hoshako reiki ni yoru hyomenko hanno process

    Energy Technology Data Exchange (ETDEWEB)

    Imaizumi, Y. [Tohoku University, Sendai (Japan). Institute for Materials Research; Yoshigoe, A. [Toyohashi University of Technology, Aichi (Japan); Urisu, T. [Toyohashi University of Technology, Aichi (Japan). Institute for Molecular Science

    1997-08-20

    This paper introduces the surface photo reaction processes using synchrotron radiation, and its application. A synchrotron radiation process using soft X-rays contained in electron synchrotron radiated light as an excited light source has a possibility of high-resolution processing because of its short wave length. The radiated light can excite efficiently the electronic state of a substance, and can induce a variety of photochemical reactions. In addition, it can excite inner shell electrons efficiently. In the aspect of its application, it has been found that, if radiated light is irradiated on surfaces of solids under fluorine-based reaction gas or Cl2, the surfaces can be etched. This technology is utilized practically. With regard to radiated light excited CVD process, it may be said that anything that can be deposited by the ordinary plasma CVD process can be deposited. Its application to epitaxial crystal growth may be said a nano processing application in thickness direction, such as forming an ultra-lattice structure, the application being subjected to expectation. In micromachine fabricating technologies, a possibility is searched on application of a photo reaction process of the radiated light. 5 refs., 6 figs.

  2. Analysis of bending process using forming simulation; Seikei simulation ni yoru press niji seikei kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Hamaguchi, T; Ogawa, T; Tamai, H [Mazda Motor Corp., Hiroshima (Japan)

    1997-10-01

    FEM simulation system is becoming an effective tool in the production engineering, especially in the evaluation of press formability. We have been applying it to the evaluation of defect phenomena, such as breakage and wrinkling, which occur in the drawing process to produce auto body parts. We tried a new application which treat dimensional precision and the other defect in the flanging or bending process after trimming. In this paper, we introduced the result of development and an example applied in the analysis. 1 refs., 8 figs.

  3. Synthesizing aspartyl-phenylalanine methyl precursor by enzymatic method. Kosoho ni yoru asuparutemu zenkutai no gosei

    Energy Technology Data Exchange (ETDEWEB)

    Hirata, M. (Waseda University, Tokyo (Japan)); Hirata, A. (Waseda University, Tokyo (Japan). School of Science and Engineering)

    1991-10-01

    Demand for aspartyl-phenylalanine methyl, an amino acid based artificial sweetener, is increasing for use by people on diet. The material is manufactured by making a precursor through dehydrating and condensing N-protective{sub L}-asparagine acid and {sub L}-phenylalanine methyl ester, and then removing the protective group. While the manufacturing methods include chemical process and enzymatic process, this paper introduces various researches done mainly by the latter process. The enzymatic process is simpler and safer than the chemical process, allowing experiments to be carried out easily. However, since the reaction equilibrium is biased more on the decomposition side than the synthesis side, it should be shifted to the synthesis side. Such operations may be carried out as separating the products simultaneously with the reaction, adding organic solvents, and operating the reaction in an organic solvent. The last operation, for example, reduces the concentration of liquid produced by the reaction by use of either water soluble or slightly soluble organic solvent, and improves the yield. It also has an advantage that relatively stable fixing enzymes can be adjusted by use of hydrophilic carriers. 68 refs., 8 figs.

  4. Heightening in efficiency of biological treatment by additives. Tenkazai ni yoru seibutsu shori no koritsuka

    Energy Technology Data Exchange (ETDEWEB)

    Ishikawa, M. (Fukui Institute of Technology, Fukui (Japan))

    1991-11-01

    The activated sludge process and other biological treatments, though utilized for most sewerage and drainage water disposals, often necessitate the maintenance to be managed with a professional knowledge so that confrontation is oftem impossible with trouble in management. In the present report, different basic studies are to be introduced of microbial activation by an addition with saponin. Saponin'', etymologically identical with savon'' and soap'', has been being used as natural cleaner, emulsifier and foamer in South America and Europe since olden times, and is used also for the processed food and potable water in the USA. The present experiment concluded that, in case of using it as microbial activator, the activated sludge can be considerably increased in load quantity of disposal by the heightening in oxygen-supplying power, high concentration microbial maintenance, microbial activation, etc. In the future, there will remain many problems unsolved such as what is the optimized condition for the addition depending upon the condition of base material. 3 refs., 6 figs., 1 tab.

  5. Long distance energy transfer via electromagnetic waves. Denjiha keitai ni yoru energy no chokyori yuso

    Energy Technology Data Exchange (ETDEWEB)

    Matsumoto, H. (Kyoto University, Kyoto (Japan))

    1992-11-05

    This paper describes the following matters on electric power transportation using microwaves: the world's first microwave power transmission experiment, MINIX, was carried out in Japan in 1986; power transportation using microwaves requires developing high-efficiency amplifiers, power receiving systems, and high-accuracy microwave controlling techniques; the transportation system has problems discussed on effects of microwave beams on living organisms and the existing communication networks, and atmosphere-plasma interactions on transmission paths; and a MILAX experiment was carried out in Japan in 1992, which transmitted power using a microwave of about 2.4 GHz and succeeded in flying a model airplane at an altitude of about 10 meters for about 40% seconds. The technology developed from this experiment is scheduled to be used for an ISY-METS rocket experiment in January 1993. This experiment is an extension of the MINIX experiment to transmit power using microwaves in ionosphere plasma. 30 refs., 7 figs.

  6. Development of position measuring technology by GPS; GPS ni yoru sokui gijutsu no kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    Ishizaki, T [Ministry of Transportation, Tokyo (Japan)

    1994-07-25

    With regard to the GPS (global positioning system) which uses the satellites launched and administered by the U.S.A. and has been utilized worldwide for ships, automobiles and geodetic surveys in recent years, Ministry of Transport started investigation and research on the application of its position measuring system from FY 1989. In this fiscal year, a study on position measuring methods and selection of the position measuring system to be developed were made, in FY 1991, the real-time functioning and track display were developed, in FY 1992, the initialization aboard the ship, the measure to prevent cycle slip, and the radio data communication technology were developed, and in FY 1993, a long term demonstration experiment presuming its practical use was conducted attaining the expected purpose. In this article, the developed real-time kinematic position measuring system is introduced. Regarding the position measuring methods by the GPS, there are the one point position measuring method and the relative position measuring method. Regarding this newly developed position measuring device, its application to work ships and structures can be considered in various ways. 4 figs.

  7. Measurement of crack in rock using transmitted elastic wave; Toka danseiha ni yoru ganbannai kiretsu keisoku

    Energy Technology Data Exchange (ETDEWEB)

    Tomishima, Y [National Institute for Resources and Environment, Tsukuba (Japan)

    1997-10-22

    With an objective to measure at high accuracy the positions and sizes of cracks existing in rocks, a theoretical study has been carried out on a method which utilizes initial movement characteristics of P-wave. The P-wave which diffracts and propagates at a crack tip has a characteristic that its phase may reverse according to the positional relationship between vibration transmitting and receiving points. This positional relationship is decided by the Poisson ratio of media alone. Therefore, when the P-wave is measured while the vibration transmitting and receiving points are moved sandwiching a crack, the polarity of received waveform is changed from negative to positive at a certain position as a boundary. In order to measure this change at high accuracy, an elastic wave of high frequency is required, but it is not easy to obtain the wave in situ. In contrast, utilizing the initial movement polarity can not only identify the change in the polarity, but also perform measurement at high accuracy. The present study discussed a case where cracks are parallel with a free surface and a case where the cracks have angles with the free surface, whereas it was shown that positions of the upper and lower tips of a crack, and length of the crack can be measured accurately. 4 refs., 5 figs.

  8. Point-to-point microwave power transmission experiment; Maikuroha ni yoru denryoku yuso no kiso kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Shimokura, N.; Kirihara, T. [Kansai Electric Power Co. Inc., Osaka (Japan)

    1997-09-30

    In order to demonstrate the power transmission using microwave and arrange advantages and problems in the wireless power transmission, field tests of point-to-point power transmission were conducted. Microwave frequency of 2.45 GHz was used, which is assigned as the industrial, scientific and medical frequency. The transmission system is composed of generator, director tube, primary radiator, and transmission antenna. The maximum 5 kW of microwave power can be transmitted by combining a 3 m-diameter parabolic antenna and a magnetron. The receiving system is composed of devices called as RECTENNA (rectifying antenna). A large capacity and high efficiency RECTENNA was developed, by which the maximum 2.5 W of input power per single device can be provided. As a result of the experiments, efficiency at the transmission side was over 70%, and RF-DC efficiency at the receiving side was about 51%. At the open-air test site, however, the total efficiency of only 14.8% could be obtained. 8 refs., 12 figs.

  9. Energy transmission using microwaves and its possibility. Maikuroha ni yoru energy yuso to sono kanosei

    Energy Technology Data Exchange (ETDEWEB)

    Matsumoto, H.; Shinohara, N. (Kyoto University, Kyoto (Japan))

    1993-09-01

    Transmitting of electric energy in the form of electromagnetic waves is a century-old idea, which has reached its final step of realization at last. This paper describes a review and future prospects on electric power transmitting technologies using microwaves (a wavelength of 12 cm is thought as the most promising candidate). Electric power was transmitted successfully to a flying helicopter in the U.S.A. in 1964. Transmission of 30-kW power was performed in 1975 to a power receiving rectenna (an antenna with microwave receiving rectification circuit) placed 1.6 tm away using a parabola as a transmitting antenna. These studies were carried over to the investigative studies on space power stations (SPS). This is a conception to install a static satellite equipped with a huge solar cell array in the sky of about 36,000 km high to generate power, convert the power to microwaves, and transmit the power of ten million kilowatt class to the ground. A number of results of advanced experiments have been obtained in Japan using rockets or aircraft. 26 refs., 5 figs.

  10. Depolymerization of coal by oxidation and alkylation; Sanka bunkai to alkyl ka ni yoru sekitan kaijugo

    Energy Technology Data Exchange (ETDEWEB)

    Tomita, H.; Isoda, T.; Kusakabe, K.; Morooka, S. [Kyushu University, Fukuoka (Japan). Faculty of Engineering; Hayashi, J. [Hokkaido University, Sapporo (Japan). Center for Advanced Research of Energy Technology

    1996-10-28

    Change in depolymerization degree and coal structure was studied for depolymerization treatment of coal in various alcohol containing aqueous hydrogen peroxide. In experiment, the mixture of Yallourn coal, alcohol and aqueous hydrogen peroxide was agitated in nitrogen atmosphere of normal pressure at 70{degree}C for 12 hours. As the experimental result, the methanol solubility of only 5% of raw coal increased up to 35.2% by hydrogen peroxide treatment, while the yield of insoluble matters also decreased from 94% to 62%. Most of the gas produced during treatment was composed of inorganic gases such as CO and CO2, and its carbon loss was extremely decreased by adding alcohol. From the analytical result of carbon loss in hydrogen peroxide treatment, it was clarified that alkylation advances with introduction of alkyl group derived from alcohol into coal by hydrogen peroxide treatment under a coexistence of alcohol, and depolymerization reaction of coal itself is thus promoted by alcohol. 4 refs., 7 figs., 1 tab.

  11. Development of plastic pulley by injection molding; Shashutsu keisei ni yoru jushi pulley no kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    Yoshizumi, F; Funatsu, A; Yazawa, H [Sumitomo Bakelite Co. Ltd., Tokyo (Japan)

    1997-10-01

    We developed plastic pulley for automobile manufactured by injection molding which will reduce manufacturing cost. We have developed product design, injection molding technology especially to improve mechanical strength and phenolic molding compound with good wear resistance and high mechanical strength. We have established `Injection Compression molding` technology to improve mechanical strength of weld portion. We also developed phenolic molding compound which is composed of one step resin and long organic fiber to obtain good wear resistance and high mechanical strength. Manufacturing cost will be reduced by using injection molding combined with lower material cost of the newly developed compound. 12 figs., 2 tabs.

  12. Fault structure analysis by means of large deformation simulator; Daihenkei simulator ni yoru danso kozo kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Murakami, Y.; Shi, B. [Geological Survey of Japan, Tsukuba (Japan); Matsushima, J. [The University of Tokyo, Tokyo (Japan). Faculty of Engineering

    1997-05-27

    Large deformation of the crust is generated by relatively large displacement of the mediums on both sides along a fault. In the conventional finite element method, faults are dealt with by special elements which are called joint elements, but joint elements, elements microscopic in width, generate numerical instability if large shear displacement is given. Therefore, by introducing the master slave (MO) method used for contact analysis in the metal processing field, developed was a large deformation simulator for analyzing diastrophism including large displacement along the fault. Analysis examples were shown in case the upper basement and lower basement were relatively dislocated with the fault as a boundary. The bottom surface and right end boundary of the lower basement are fixed boundaries. The left end boundary of the lower basement is fixed, and to the left end boundary of the upper basement, the horizontal speed, 3{times}10{sup -7}m/s, was given. In accordance with the horizontal movement of the upper basement, the boundary surface largely deformed. Stress is almost at right angles at the boundary surface. As to the analysis of faults by the MO method, it has been used for a single simple fault, but should be spread to lots of faults in the future. 13 refs., 2 figs.

  13. Weight reduction of automobile parts using light metals. Keikinzoku shiyo ni yoru jidosha buhin no keiryoka

    Energy Technology Data Exchange (ETDEWEB)

    Hayashi, S [Toyota Motor Corp., Aichi (Japan)

    1992-12-25

    Weight reduction of automobiles is required from the viewpoint of reduction of CO2 emission and energy conservation. Comparing a car with another one of almost the same size and performance with 1% reduced weight, combustion efficiency of the latter can be improved by 0.5-0.8%. This report introduces several examples, in which steel parts are replaced with light alloy parts to reduce car weight, and describes the future perspective. Concerning a cylinder block which is the heaviest part among engine parts, a block made of aluminum alloy with no cast liner has been developed. There is also an example of an oil pan adopting aluminum die-cast for a part of it. A valve lifter made of aluminum alloy has been developed for valve system parts and has contributed to friction loss, noise reduction, and improvement of fuel consumption. As for steering system parts, a steering bracket made of Mg alloy die-cast has been developed. The use of light alloy parts, in general, increases material cost. Therefore it is now required to build up closer connection between designs and production techniques and to improve reliability of casting and forging technologies. 5 refs., 20 figs.

  14. Biomodification of edible fats and oils by yeasts; Kobo ni yoru shokuyo yushi no seibutsugakuteki kaishitsu

    Energy Technology Data Exchange (ETDEWEB)

    Fujimoto, K.; Endo, Y. [Tohoku University, Sendai (Japan). Faculty of Agriculture

    1995-10-20

    Lipid-biomodification ability was examined for yeasts isolated from soil using culture medium containing beef tallow (2%). Some yeasts, e.g. Candida, Trichosporon and Rhodotorula species were able to grow on fats and oils. Fatty acid and triacylglycerol compositions were modified in lipids of some strains. Candida sp. MIS-1 and YM1-1 preferentially produced oleic acid. Candida sp. MIS-1 had high level of triacylglycerol with a melting point like olive oil. Fatty acid composition of lipids in Candida lipolytica IAM4948 and Rhodotorula sp. AO3-5 was similar to that of cacao butter. Yeast oils obtained from C. lipolytica provided the melting characterization different from beef tallow. 30 refs., 3 figs., 7 tabs.

  15. Continuous gravity monitoring of geothermal activity; Renzoku juryoku sokutei ni yoru chinetsu katsudo no monitoring

    Energy Technology Data Exchange (ETDEWEB)

    Sugihara, M [Geological Survey of Japan, Tsukuba (Japan)

    1997-05-27

    To clarify the geothermal activity in the geothermal fields in New Zealand, gravity monitoring was conducted using SCINTREX automatic gravimeter. The measurements were conducted between the end of January and the beginning of March, 1996. Firstly, continuous monitoring was conducted at the standard point for about ten days, and the tidal components were estimated from the records. After that, continuous monitoring was conducted at Waimangu area for several days. Continuous monitoring was repeated at the standard point, again. At the Waimangu area, three times of changes in the pulse-shape amplitude of 0.01 mgal having a width of several hours were observed. For the SCINTREX gravimeter, the inclination of gravimeter is also recorded in addition to the change of gravity. During the monitoring, the gravimeter was also inclined with the changes of gravity. This inclination was useful not only for the correction of gravity measured, but also for evaluating the ground fluctuation due to the underground pressure source. It is likely that the continuous gravity monitoring is the relatively conventional technique which is effective for prospecting the change of geothermal reservoir. 2 figs.

  16. Three dimensional wavefield modeling using the pseudospectral method; Pseudospectral ho ni yoru sanjigen hadoba modeling

    Energy Technology Data Exchange (ETDEWEB)

    Sato, T; Matsuoka, T [Japan Petroleum Exploration Corp., Tokyo (Japan); Saeki, T [Japan National Oil Corp., Tokyo (Japan). Technology Research Center

    1997-05-27

    Discussed in this report is a wavefield simulation in the 3-dimensional seismic survey. With the level of the object of exploration growing deeper and the object more complicated in structure, the survey method is now turning 3-dimensional. There are several modelling methods for numerical calculation of 3-dimensional wavefields, such as the difference method, pseudospectral method, and the like, all of which demand an exorbitantly large memory and long calculation time, and are costly. Such methods have of late become feasible, however, thanks to the advent of the parallel computer. As compared with the difference method, the pseudospectral method requires a smaller computer memory and shorter computation time, and is more flexible in accepting models. It outputs the result in fullwave just like the difference method, and does not cause wavefield numerical variance. As the computation platform, the parallel computer nCUBE-2S is used. The object domain is divided into the number of the processors, and each of the processors takes care only of its share so that parallel computation as a whole may realize a very high-speed computation. By the use of the pseudospectral method, a 3-dimensional simulation is completed within a tolerable computation time length. 7 refs., 3 figs., 1 tab.

  17. Groundwater exploration by self-potential method; Shizen den`iho ni yoru chikasui tansa

    Energy Technology Data Exchange (ETDEWEB)

    Onaru, I; Irie, S; Mizunaga, H; Ushijima, K [Kyushu University, Fukuoka (Japan). Faculty of Engineering

    1997-05-27

    This paper describes results measured from the field experiments and data analysis of the groundwater exploration by self-potential method. The field survey was conducted in the vicinity of spring water source in the suburbs of Fukuoka City. For the field experiments, potential differences from the standard potential electrode set at the distance about 200 m were measured at multi-points, simultaneously. For the laboratory experiments, assuming that the groundwater flows in a permeable layer, streaming potential change was observed against the changes of flow rate and electrical conductivity. Thus, the generation of streaming potential was investigated. For the experiment using specimens obtained at the spring water source, the potential changed to negative and was stabilized in around -80 mV after 15 minutes. Numerical simulation was conducted by means of the three-dimensional finite difference method using parameters obtained from the laboratory experiments. From these results, the groundwater flow image could be obtained. It was also confirmed that the self-potential observed in the spring water source area was caused by the streaming potential. 11 refs., 9 figs.

  18. 3D pre-stack time migration; Kiruhihoffuho ni yoru sanjigen jugo mae jikan migration shori

    Energy Technology Data Exchange (ETDEWEB)

    Nakajima, Y; Matsuoka, T [Japan Petroleum Exploration Corp., Tokyo (Japan); Tsuru, T [Japan National Oil Corp., Tokyo (Japan)

    1997-05-27

    This paper reports pre-stack migration in elastic wave exploration as to its algorithm and examples of processed data. The time migration processing hypothesizes that seismic waves propagate linearly. It calculates travel time by dividing the sum of the straight distance from a vibration transmitting point to an image point and the straight distance from the image point to a vibration receiving point with RMS velocity given as a parameter. To maintain the relative relation of amplitude sizes, the signal on an elliptic body is made smaller in inverse proportion to the size of that elliptic body. With regard to apparent interval of input trace as seen from the reflection surface, or with regard to density, the signal is made smaller by cos{theta} times. While this program deals with three-dimensional migration, its output turns out as an arbitrary two-dimensional plane. The program requires a huge amount of data processing, whereas a method is used, that the input trace is divided, each group is processed by using separate computers, and the results are summed up. 3 refs., 4 figs.

  19. Countermeasures for increasing sequence continuous casting; Renchu kinosei taikabutsu zaishitsu, kozo kaizen ni yoru renrenchusu kojosaku

    Energy Technology Data Exchange (ETDEWEB)

    Tsuda, Masato; Shinagawa, Hiroaki; Kamada, Ryuji; Hiraga, Yutaka; Hara, Takayasu [Nippon Steel Corp., Tokyo (Japan)

    1999-06-01

    In the second continuous casting line of Kure Iron Works, Nisshin Steel Co., Ltd. improvement of the continuous casting counts per tundish was attempted for a target of max. 20. The results are as follows: (1) Non-SiO{sub 2} conversion of material for the long nozzle immersed part: About 20% improvement of durability compared with a conventional material to clear 0.059 mm/min of the targeted erosion speed when 20 CCC/TD is realized, (2) Durability improvement of SN plate: About 20% durability improvement was attained compared with a conventional material by the adoption of a non-SiO{sub 2} material, (3) Erosion resistance improvement of the immersed nozzle slug line part: Castable period was extended to 1 ch life improvement by increasing zirconia content, (4) Rise of stopper full open position: The rise of the full open position produced less variation of melt level than the conventional structure without increase of the SN opening, enabling plugging prevention between the stopper head and the upper nozzle which was an objective of this improvement, (5) Structure improvement of the upper nozzle: This improvement successfully prevented leaks from damage of the casting stop nozzle metal case and enabled casting under low gas flow even in TD nozzle plugging. These improvements gave a possibility to achieve max. 20 CCC/TD. (NEDO)

  20. Regeneration of furfural on activated carbon with methanol; Furufuraru kyuchakutan no metanoru ni yoru saisei

    Energy Technology Data Exchange (ETDEWEB)

    Sudo, Y. [Tokyo National College of Technology, Tokyo (Japan); Suzuki, M. [Tokyo Univ. (Japan). Inst. of Industrial Science

    1998-03-01

    Experiments of regenerating solvent from activated carbon are performed using furfural (1-phenyl-2-propane) as the absorbent and methanol as the solvent for regeneration. In 5 repeated adsorption-desorption cycles, the solvent becomes in dynamic stationary state after the second cycle with about 10% not desorption yet, and it is found that considerable number of repetition of furfural adsorbed carbon regeneration is possible by the use of methanol. The overall mass transfer coefficient of furfural and methanol in desorption is calculated. In addition, an experiment is carried out changing the adsorption ratio of furfural and the flow velocity of methanol to investigate desorption mechanism of furfural adsorbed carbon. Larger difference of adsorption equilibrium of furfural in aqueous solution and in methanol is efficient in desorption of furfural adsorbed carbon by methanol, but it is found that desorption rate is affected by mixed diffusion in the column and the surface diffusion is dominant in particles. 17 refs., 10 figs.

  1. High power YAG laser cutting; Koshutsuryoku YAG laser ni yoru setsudan gijutsu

    Energy Technology Data Exchange (ETDEWEB)

    Owaki, K. [Ishikawajima-Harima Heavy Industries Co. Ltd., Tokyo (Japan)

    1998-08-01

    This paper describes features of high power YAG cutting. The optical fiber transmission YAG laser machining system has some advantages in which optical path length compensation unit is not required and measures for low power loss and dust are not required, when compared with the CO2 laser system. Its application to the cutting of stainless steel plates has attracted attention. Cutting tests of SUS304 were conducted using high power YAG laser. Cutting of SUS304 plate with a thickness of 40 mm could be successfully done at the power of 3.5 kW. Cutting tests of SUS304 pipes with a thickness of 8 mm in water under the depth of 20 m were also conducted using air as assist gas at the power of 2.5 kW. Excellent results were obtained without scale deposition. For the tests by the composite beam using 3 kW and 4 kW systems, SUS304 plate with a thickness of 50 mm could be cut at the cutting speed of 0.1 m/min. Laser cutting of pipes from the internal surface was conducted using a newly developed small machining head which can rotate in the peripheral direction. Excellent quality for welding was confirmed. Cutting speed and plate thickness were improved by combining water jet cutter and YAG laser unit. 6 refs., 10 figs.

  2. Car audio using DSP for active sound control. DSP ni yoru active seigyo wo mochiita audio

    Energy Technology Data Exchange (ETDEWEB)

    Yamada, K.; Asano, S.; Furukawa, N. (Mitsubishi Motor Corp., Tokyo (Japan))

    1993-06-01

    In the automobile cabin, there are some unique problems which spoil the quality of sound reproduction from audio equipment, such as the narrow space and/or the background noise. The audio signal processing by using DSP (digital signal processor) makes enable a solution to these problems. A car audio with a high amenity has been successfully made by the active sound control using DSP. The DSP consists of an adder, coefficient multiplier, delay unit, and connections. For the actual processing by DSP, are used functions, such as sound field correction, response and processing of noises during driving, surround reproduction, graphic equalizer processing, etc. High effectiveness of the method was confirmed through the actual driving evaluation test. The present paper describes the actual method of sound control technology using DSP. Especially, the dynamic processing of the noise during driving is discussed in detail. 1 ref., 12 figs., 1 tab.

  3. Environmental pollution by dioxin and its biodegradation; Dioxin ni yoru kankyo osen to sono biseibutsu bunkai

    Energy Technology Data Exchange (ETDEWEB)

    Nojiri, H.; Yamane, H.; Omori, T. [Tokyo Univ. (Japan)

    1998-10-20

    Polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and coplanar polychlorinated biphenyls (Co-PCBs) exhibit similar chemical and biological properties. Because of their highly toxic activity, the pollution with these compounds, which are called dioxin-related compounds, is one of the most serious environmental problems. In this review, we described the analytical methods of dioxin-related compounds in environmental samples, especially in the exhaust gas from the incineration site of municipal solid waste. In addition, we described the present situation of environmental pollution by dioxin-related compounds, including pollution levels in environmental, human, and food samples, daily intakes, and risk assessment. On the other hand, a number of microorganisms have been reported which are able to degrade dioxin-related compounds including PCDDs and PCDFs. These microorganisms are classified into two groups, lignin-degrading white rot fungi and the dioxin-degrading bacteria. We also described the degradation pathways of dioxin-related compounds in these microorganisms, and their degradative enzymes. 47 refs., 5 figs., 4 tabs.

  4. Catalyst surface characterized by high magnetic field NMR; Kojiba NMR ni yoru shokubai hyomen no kansatsu

    Energy Technology Data Exchange (ETDEWEB)

    Sato, S. [Chiba University, Chiba (Japan). Faculty of Engineering

    1997-08-01

    This paper introduces studies performed by the authors on observation of surface of solid catalysts by means of solid NMR measurement using the high-speed MAS technology which uses a high magnetic field device. In the studies, a device with 14.1T (resonant frequency of proton at 600 MHz) was used to conduct CP-MAS NMR measurement on {sup 29}Si to identify bonding of silica carrier in a fixed aluminum chloride catalyst. As a result, it was verified that the surface structure of aluminum chloride species deposited on the silica carrier turns to a structure in which AlCl2 species of a monomeric substance is bonded with a surface hydroxyl group and fixed in four- or five-orientation. When adjusted at low temperatures, an Al2Cl5 structure is formed, which is fixed as a dimeric substance with AlCl3 oriented in the AlCl2 species. It is conceived that the Al2Cl5 species has higher electrophilicity than the AlCl2 species as a result of AlCl3 oriented in AlCl2, whereas the hydroxyl group on the silica surface oriented with the Al2Cl5 species dissociates, discharging protons, thus showing strong acidity. 18 refs., 8 figs., 2 tabs.

  5. CVT control and vehicle acceleration; CVT hensoku ni yoru shasoku otosei

    Energy Technology Data Exchange (ETDEWEB)

    Takiyama, T; Morita, S [Osaka City University, Osaka (Japan)

    1997-10-01

    For the drivetrain control, it becomes important for fuel economy or AHS to control the throttle valve of the engine and the gear ratio of CVT simultaneously by DBW when CVT is equipped with the automobile. In this paper, LQI control theory was applied to control the drivetrain as 2-I/O system to satisfy the commanded speed and better fuel economy. And modification of the weight parameter of LQI was investigated to obtain the desired performance for fuel economy or vehicle acceleration. Relatively good expected results were obtained. 5 refs., 7 figs., 1 tab.

  6. Treatment of hexavalent chrome by bacteria. Saikin ni yoru rokka kuromu no shori

    Energy Technology Data Exchange (ETDEWEB)

    Otake, H [Hiroshima University, Hiroshima (Japan). Faculty of Engineering

    1993-08-01

    A biological reduction method in which hazardous hexavalent chrome is reduced by bacteria is explained as one of the bioremediation technologies. Those bacteria are separated from active sludge in the urban sewage treatment plant. The hexavalent chrome-reducing bacteria were isolated by cultivating the sludge. They were Enterobacter cloacae which are intestinal bacteria. Then, they were named HO1 stock. As a result of analyzing the reduction mechanism, it was made clear that the function is localized in the cellular endosporium and that the reduction is made by utilizing the electronic transfer system of endosporium. Under both aerobic and anaerobic conditions, they convert the hexavalent chrome into the trivalent chrome outside the cells. As a result of test, it was known that 5mM hexavalent chrome can be treated in one day. A quick reduction was confirmed also through an experiment in which carbon source was added to the industrial wastewater. If used for the treatment of sludge/water contaminated by hexavalent chrome, the present reduction by bacteria has the following advantages: The highest reduction rate is given near pH=7 at ordinary temperatures. It is not necessary to add chemicals. Energy is not needed. It is a disadvantageous fact that the present bacteria, if exposed to oxygen, become inactive. 18 refs., 5 figs.

  7. FY1995 community support by mobile agents; 1995 nendo mobile agent ni yoru community keisei shien

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    The purpose is to develop fundamental technologies for navigation systems and mobile computing systems in museums, theme parks and cities. Concretely, we implement software agents into the mobile computing environment which consists of PHS, mobile computers and mobile robots, and realize various functions to access regional information. We have studied on Communityware which supports human activities and communities by using mobile agents implemented into mobile computers and town robots. The mobile agents, which intelligently process information obtained in physical and virtual worlds, access regional information which is omnipresent in the environment. With respect to the approach using mobile computers, we have provided one hundred mobile computers in the international conference on multiagent systems 1996 and carried out the first experimentation of mobile computing in the world. The mobile computer has two functions: Community Viewer which displays interactions between members of communities and Social Matchmaker which supports to hold meetings by searching for people who have common interests. With respect to the approach using town robots, we have developed a robot system which can robustly behave in a complex outdoor environment by using vision agents embedded in the environment. The system aims at support of people in streets. (NEDO)

  8. Fixation of carbon dioxide by coral reef. Sangosho ni yoru CO2 no kotei

    Energy Technology Data Exchange (ETDEWEB)

    Yamamuro, M [Geological Survey of Japan, Tsukuba, Ibaraki (Japan)

    1993-08-01

    The methods for fixation of carbon dioxide in the atmosphere in order to control the greenhouse effect, are groped. Carbon is fixed through two ways such as the production of organic compounds by photosynthesis and formation of calcium carbonate by calcification. Among them, the photosynthesis fixes carbon dioxide in the air, and calcification, on thinking of only chemical equilibrium in the sea water, is a process to exhaust carbon dioxide from ocean to the atmosphere. It is, therefore, uneven in opinions of researchers if the coral reef is an absorbing source or an exhausting one of carbon dioxide. A conventional discussion on this theme, did not carry out based on the actual search or measurement, but preceded on modelling. In order, therefore, to introduce a scientific decision on a play of the coral reef for the global carbon circulation, it seems to take more time. In this paper, an opinion that the coral reef is an absorbing source of carbon dioxide in the air according to some measuring results of carbon dioxide fixation velocity and organic compounds volume in sediments in the coral reefs, are described. 11 refs., 4 figs.

  9. CO2 fixation by coral reefs. Sangosho ni yoru nisanka tanso no kotei

    Energy Technology Data Exchange (ETDEWEB)

    Kayane, H [Geological Survey of Japan, Tsukuba (Japan)

    1993-05-01

    In order for a coral reef to be a CO2 absorbing source, a condition would have to be satisfied that, with respect to production of organic carbon through photosynthesis, a total production by coral reef organism association is large, and the ratio of the total production to a total consumption is more than one. A requirement that the ratio of inorganic carbon production through calcification be 1.5 or more must also be met. Measurements have been carried out at coral fields off the Ishigaki Island by the Geological Research Center. The measurement results revealed that production is high for both of organic carbon and inorganic carbon, surplus organic carbon is produced, and CO2 is absorbed into the coral reefs. It was also found by measuring the stable isotope ratio of nitrogen in coral reef organisms that nitrogen required for the production in the coral reefs is supplied from the atmosphere through nitrogen fixation. The paper adds a description that CaCO3 deposition in the coral reefs has peaked in 5000 years to 6000 years ago, and it is in a ceiling-hit condition now. 25 refs., 3 figs.

  10. Biological fixation of carbon dioxide. Seibutsu ni yoru nisanka tanso no kotei

    Energy Technology Data Exchange (ETDEWEB)

    Someya, J [Fermentaion Research Institute, Tsukuba (Japan)

    1991-10-20

    Bulks of photosynthetic product to reduce the carbon dioxide by the light energy are forests, represented by the tropical rain forests, on the land, and marine algae and coral reefs in the ocean. For the purpose of effectively utilizing the fixation power of carbon dioxide through the photosynthesis by higher plants and algae, it is necessary to make many further researches, starting with a conditional selection of species, excellent in both absorption and fixation of carbon dioxide. The Japan Technology Transfer Association has recently issued a design to build a large scale closed type farm in the vicinity of factory, exhausting the carbon dioxide, and supply it to structure a system of producing vegetable and other food. What largely contributes to the calcification in the ocean is the coral reefs, where coral is symbiotic with brown algae., called dinoflagellatae. Those algae are judged to accelerate the formation of calcium carbonate by the photosynthesis. To estimate the absorption power of oceanic carbon dioxide, it is important to quantitatively know the calcification by the coral. 4 figs., 1 tab.

  11. Coral reefs as fixers of CO2. Sangosho ni yoru nisanka tanso no kotei

    Energy Technology Data Exchange (ETDEWEB)

    Yamamuro, M [Geological Survey of Japan, Tsukuba (Japan)

    1992-07-25

    This paper explains CO2 fixing mechanisms in coral reefs and technologies to construct coral reef eco-factories. A coral reef fists CO2 through two routes of photosynthesis and calcification, with both processes proceeding conjugately. Calcification is driven by the photosynthesis that proceeds at a rate more than ten times faster than the calcification. The Geological Survey of Japan is working on elucidating CO2 fixing mechanisms in coral reefs and studying coral reef eco-factory structuring technologies to utilize the capability of the mechanisms at a possible maximum extent. This study is directed to optimizing site conditions for coral reefs, optimal arrangements and environmental conditions for clusters, and production process determining factors. The structuring technologies may include controlling water temperatures, water flows, nutritious salts, and suspended substances that match optimal CO2 fixing conditions in coral reefs; seeding technologies for coral reef organisms; aquaculture techniques utilizing fixed CO2; combination with cultivating techniques; and combination with new energy technologies including sea water temperature difference power generation to control water flows and maintain facilities. 4 refs., 5 figs.

  12. Chlorofluorocarbons (CFCs) destruction technology by induction coupled plasma; Koshuha purazuma ni yoru tokutei furon hakai gijutsu ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Kobayashi, A. [Nippon Steel Corp., Tokyo (Japan)

    1999-09-05

    Abolishing flon in which the reuse by pollution and degradation is difficult by recovery flon and recovery and recycling process which do not rotate for the middle reuse that the recovery system is constructed is arising. And, the specific flon recovery quantity increases with the progress of development of the recent CFC substitute and renewal to the CFC substitute correspondence machine. Specific flon collapse technique using rf plasma introduced in this paper cultivated the basic technology in Agency of Industrial Science and Technology, resources environment integrated research place. The demonstrated operation research was carried out under Ministry of International Trade and Industry, New Energy and Industrial Technology Development Organization since December 1994. (NEDO)

  13. High-accuracy measurement of ship velocities by DGPS; DGPS ni yoru sensoku keisoku no koseidoka ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Yamaguchi, S; Koterayama, W [Kyushu Univ., Fukuoka (Japan). Research Inst. for Applied Mechanics

    1996-04-10

    The differential global positioning system (DGPS) can eliminate most of errors in ship velocity measurement by GPS positioning alone. Through two rounds of marine observations by towing an observation robot in summer 1995, the authors attempted high-accuracy measurement of ship velocities by DGPS, and also carried out both positioning by GPS alone and measurement using the bottom track of ADCP (acoustic Doppler current profiler). In this paper, the results obtained by these measurement methods were examined through comparison among them, and the accuracy of the measured ship velocities was considered. In DGPS measurement, both translocation method and interference positioning method were used. ADCP mounted on the observation robot allowed measurement of the velocity of current meter itself by its bottom track in shallow sea areas less than 350m. As the result of these marine observations, it was confirmed that the accuracy equivalent to that of direct measurement by bottom track is possible to be obtained by DGPS. 3 refs., 5 figs., 1 tab.

  14. Research on crystal growth by using pressure as a control parameter; Atsuryoku seigyo ni yoru kessho seicho ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-10-31

    This research project aims to establish a technique for crystal growth using pressure as a principal control parameter, and combining it with a microgravity condition, to develop a novel process material fabrication. Since the solubility of materials depends on pressure, it is possible to control a supersaturated condition for crystal growth by changing pressure. The growth condition can be controlled precisely, which is not possible by conventional methods that vary temperature and other factors. On the other hand, because a concentration diffusing field is formed autonomically around crystals in association with their growth, density convection is generated under gravity as a result of difference in the concentrations, making the growth conditions severely complex and uncontrollable. Ideal crystal growth condition control may be possible if the pressure control is performed under micro-gravity by which generation of the density convection can be suppressed. Realization has been achieved on in-situ observation by using high-magnification microscope which uses a diamond anvil cell, development of a hydraulic type optic pressure cell, and a high- speed crystal growing technology by means of pressure control utilizing the cell. New findings were also obtained on effects of pressure on crystal forms, and the pressure induced solid phase transfer mechanism. 67 refs., 49 figs., 3 tabs.

  15. Test results of cultivation of vegetables with fish breeding water; Yogyosui riyo ni yoru yasai saibai shiken kekka ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Nishida, S. [Hokuriku Electric Power Co. Inc., Toyama (Japan)

    1997-10-28

    Entrails of fish, fowls and domestic animals are mostly incinerated at large expenses, although partly used as foods. This study is to test `possibility of vegetable cultivation with fish breeding water,` where the entrail wastes are used as baits for fish breeding, and fish excretions are used as the fertilizer for vegetable cultivation to purify water for fish breeding. The cultivation bed consists of two sections, one for fish breeding/vegetable cultivation and the other for vegetable cultivation by the normal method. Vegetable grow notably less in the former than in the latter, 54.6 to 79.5 versus 100. Spinach contains slightly higher contents of vitamins A and C by 6 and 13%, when cultivated in the former than in the latter. Quantities of total nitrogen, phosphorus and potassium as the fertilizer components in the former are 49, 49 and 1.7% of those in the latter. It is predicted, judging from growth of the vegetables, that the former gives a harvest comparable with that by the latter, when given a 6 to 13 days longer cultivation period. 3 figs., 2 tabs.

  16. Test results on vegetable cultivation using fish breeding water; Yogyosui riyo ni yoru yasai saibai shikenkekka ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Nishida, S. [Hokuriku Electric Power Co. Inc., Toyama (Japan)

    1997-10-30

    Although a part of the entrails of fishes, birds and livestock is used for food, most of them are treated by costly combustion because of their bad odor and looking, and International Environment and Welfare Laboratory, Toyama prefecture in Japan is studying their profitable treatment. As a part of such study, possibility of hydroponic cultivation of vegetable was tested using fish breeding water including excretions of fishes and residual feeds after use of waste as feed, and the growth condition, safety and effectiveness of cultured vegetable were verified. Three-hundred and fifty viviparous Oryzias were released into a breeding water area with no controlled pH and EC (electric conductivity). For comparison a culture solution area of 6.0 in pH and 1.2ms/cm in EC was prepared. The result on cultivation of 6 kinds of vegetable in culture beds supported by circulation of these water showed that hydroponic cultivation of vegetable using fish breeding water is possible, and average growth of 68% is obtained although difference in growth for every vegetable is found. 8 figs., 5 tabs.

  17. Flat plate approximation in the three-dimensional slamming; Heiban kinji ni yoru sanjigen suimen shogeki keisanho ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Toyama, Y. [Mitsui Engineering and Shipbuilding Co. Ltd., Tokyo (Japan)

    1996-12-31

    A slamming load generated by interactive motions between a ship body and water face is an important load in ensuring safety of the ship. A flat plate approximation developed by Wagner is used as a two-dimensional slamming theory, but it has a drawback in handling edges of a flat plate. Therefore, an attempt was made to expand the two-dimensional Wagner`s theory to three dimensions. This paper first shows a method to calculate water face slamming of an arbitrary axisymmetric body by using circular plate approximation. The paper then proposes a method to calculate slamming pressure distribution and slamming force for the case when shape of the water contacting surface may be approximated by an elliptic shape. Expansion to the three dimensions made clear to some extent the characteristics of the three-dimensional slamming. In the case of two dimensions or a circular column for example, the water contacting area increases rapidly in the initial stage generating large slamming force. However, in the case of three dimensions, since the water contacting area expands longitudinally and laterally, the slamming force tends to increase gradually. Maximum slamming pressure was found proportional to square of moving velocity in a water contacting boundary in the case of three dimensions, and similar to stagnation pressure on a gliding plate. 12 refs., 17 figs., 1 tab.

  18. Consideration on local blast vibration control by delay blasting; Danpatsu happa ni yoru kyokuchiteki shindo seigyo ni kansuru ichikosatsu

    Energy Technology Data Exchange (ETDEWEB)

    Mogi, Gento; Adachi, Tsuyoshi; Yamatomi, Jiro [The University of Tokyo School of Engineering Department of Geosystem Engineering, Tokyo (Japan); Hoshino, Tatsuya [Mitsui Mining and Smelting Corp., Tokyo (Japan)

    1999-10-31

    In this research, local blast vibration control based on the theory of superposition of waves was investigated. Firstly, the influence of delay time errors of conventional electric detonators upon the level of local blast vibration was examined. Secondly, for a further effective local blast vibration control, a new delay blasting design concept 'combined delay blasting' that postulates the use of electronic detonators, which virtually have no delay time errors, is proposed. For a delay blasting with uniform detonation time intervals, an optimum time interval to minimize the local PPV (Peak Particle Velocity) is obtained based on the relationship between the PPV and the time interval, which is derived by superposing identical vibration time histories of each single hole shot. However, due to the scattering of the actual delay time caused by errors, PPV of a production blast seldom coincides with the estimated one. Since the expected value and the variance of PPV mainly depend on sensitivity of PPV around the nominal delay time, it is proposed that not only the optimum but also several sub-optimum candidates of delay time should be examined taking error into consideration. Concerning the 'combined delay blasting', its concept and some simulation results are presented. The estimated reduction effect of blast vibration of a delay blast based on this concept was quite favorable, indicating a possibility for further effective local blast vibration control. (author)

  19. Flat plate approximation in the three-dimensional slamming; Heiban kinji ni yoru sanjigen suimen shogeki keisanho ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Toyama, Y [Mitsui Engineering and Shipbuilding Co. Ltd., Tokyo (Japan)

    1997-12-31

    A slamming load generated by interactive motions between a ship body and water face is an important load in ensuring safety of the ship. A flat plate approximation developed by Wagner is used as a two-dimensional slamming theory, but it has a drawback in handling edges of a flat plate. Therefore, an attempt was made to expand the two-dimensional Wagner`s theory to three dimensions. This paper first shows a method to calculate water face slamming of an arbitrary axisymmetric body by using circular plate approximation. The paper then proposes a method to calculate slamming pressure distribution and slamming force for the case when shape of the water contacting surface may be approximated by an elliptic shape. Expansion to the three dimensions made clear to some extent the characteristics of the three-dimensional slamming. In the case of two dimensions or a circular column for example, the water contacting area increases rapidly in the initial stage generating large slamming force. However, in the case of three dimensions, since the water contacting area expands longitudinally and laterally, the slamming force tends to increase gradually. Maximum slamming pressure was found proportional to square of moving velocity in a water contacting boundary in the case of three dimensions, and similar to stagnation pressure on a gliding plate. 12 refs., 17 figs., 1 tab.

  20. Research report of fiscal 1997. Study on total energy and material control (feasibility study on circulating society); 1997 nendo chosa hokokusho. Total energy and material control ni kansuru chosa (junkangata shakai kochiku kanosei chosa) chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    In order to construct real sustainable global environment and human society in the 21st century called the century of environment, not only the innovation of manufacturing processes technically supporting such the construction but also the conception including the innovation of the whole society from a wide viewpoint are essential. As a total energy and material control system (TEMCOS) concept, the view of an energy-saving circulating society is attempted which minimizes a total energy and material flow in Japan, and the role and issue of manufacturing industry, in particular, material industry are extracted. As one of the targets of such a concept, the conception of an eco-town is also described. Paying attention on some important material industries including a mass material flow and consuming a large amount of energy such as metal, plastics and automobile industries, the study result on a material flow for every industry is arranged, and some effective issues contributing to minimize a material flow and control energy consumption and CO2 emission are extracted. 80 refs., 67 figs., 30 tabs.

  1. FY 2000 report on the survey of the project to promote and support the formation of the environmentally friendly energy community. Study of the industrialization of the gasification power generation business by the pressurized two-stage gasification process using organic waste such as waste plastic as raw materials; 2000 nendo kankyo chowagata energy community keisei sokushin hojo jigyo chosa hokokusho. Kaatsu nidan gas ka process ni yoru hai plastic nado yuki haikibutsu wo genryo to suru gas ka hatsuden jigyo no jigyoka kento

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    Viability was studied of the power generation business using plastic waste as fuel and the methanol production business. In the project, the container packing waste plastic which was sorted/collected is supplied by tender, and the organic waste such as shredder dust is mixed. And the electric power is supplied to the gasification power generation facilities by the pressurized two-stage gasification process, neighboring plants, etc. As an alternative, the methanol production was also studied. As a result of the study, if the total amount of the waste plastic needed at the supply price assumed at present can be supplied, the business can be viable economically even without subsidy, but if the supply risk in supposing tender is considered, a subsidy of approximately 10% of the equipment/plant investment is needed. As to the methanol production as an alternative, it was indicated that the economical efficiency is almost the same, but the profitability gets fast worse due to the waste plastic supply cost since there is not much income and expenses are high despite of the smaller investment size than that in the case of the power generation. (NEDO)

  2. Investigation on food sanitation controlling technologies; Shokuhin eisei kanri gijutsu ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    Doi, Y [Hokkaido Electric Power Co. Inc., Sapporo (Japan); Nishioka, J

    2000-03-24

    Investigation has been made on the current status of food sanitation controlling technologies. Eighty percent of food poisoning is caused by bacte such as Salmonera, enteritis vibrio, staphylococcus, and pathogenic colibacillus. Putrefaction as the cause for food poisoning occurs from proliferation of different microorganisms. Heating sterilization is the main method being performed, but non-heating method may include sterilization by flash and high voltage pulse discharge in addition to ultra-high pressure and ultraviolet ray sterilization. As a result of the questionnaire survey, what is extracted as the problems in the food sanitation controlling technologies is to establish a rinsing and sterilizing method with large sterilization effect, an effective sterilizing method and thawing of processed marine products, and a cooling method in food processing. Increasingly demanded for the future is to develop a foodstuff sanitation control system using as the core the hazard analysis critical control point (HACCP, a quality control program developed by the U.S. NASA to ensure safety in manufacturing space food), and micro-organism control and sterilizing technologies to support the above system. The flash pulse and high-voltage pulse sterilizing technologies as the non-heating sterilizing technology are more effective than the conventional heating sterilization methods also from the aspect of quality retention after sterilization. More active development thereof is desired. (NEDO)

  3. Survey of technological trends in functional membrane materials; Kinosei makuzai ni kansuru gijutsu doko chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1979-03-01

    Materials for membranes with novel functions are surveyed. The survey is focused on 10 subjects, which are high-performance RO (reverse osmosis)/UF (ultrafiltration) membranes; development of an energy-efficient secondary treatment system for urban wastewater using pollution-free membranes; high-performance ion exchange membranes; artificial lung membranes; hydrogen separation membranes (hydrogen as energy); development of an energy-efficient combustion system using gas separation membranes (oxygen-enriched membranes); organic matter separation membranes; enzyme-aided chemical reaction membranes and their application; development of a distilling ship; and functional membranes making use of photosynthesis. Discussed in this connection are the outlines of the technologies, the need of their development, methods and contents of the development efforts, and the effects and impacts of their development. The survey further concerns the particulars of the trends in novel technologies about functional membrane materials development, covering gas separation and liquid separation technologies; chemical reaction membranes; and enzyme-aided chemical reaction membranes and their application systems. As for their application, the survey covers the field of application of desalinated or ultrapure water; field of application of food fermentation technologies; industrial wastewater, valuable materials recovery, and urban wastewater treatment; and application to medical systems. (NEDO)

  4. Survey of advanced composite material technology; Senshin fukugo zairyo gijutsu ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    Results of functions and examples are investigated and described for more than 190 fiber reinforced composite materials. There should be a new viewpoint for even the same material when changing the point to observe it, and new industries will be expected if the viewpoint is adequate. This report has proposed a new concept of `composite functions.` The development works based on non-strength functions which will differentiate the other materials have been stressed. After describing the brief history of the advanced composite materials and significance of composite functions, the present situations and future possibilities of such functions as heat resistance, electricity-electromagnetism, chemicals-proof, adsorption, vibration-proof and resistance, tribology, erosion, sound, adaptability to living bodies and etc. have been examined based on the practical examples. As the future important subjects, adapting possibility of materials having composite functions to marine structures, and possibility of water cleaning system are described. 59 refs., 4 figs., 10 tabs.

  5. Survey and research on applications of parallel compiler; Heiretsu compiler tekiyorei ni kansuru chosa kenkyu hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-31

    An urgent proposition is made that an advanced computing software program development and maintenance system be set up, and activities are conducted in search of strategies and guidelines for the establishment of such a system. Out of recognition that it is important to develop software programs such as operation systems for supercomputers, a survey is conducted of software technology development strategies especially involving application software programs. It is proposed that efforts be positively exerted to develop strategic software developing programs for advanced computing for concentratedly enhancing the development now under way of strategic software programs. In concrete terms, named as strategic software programs to be developed are a next-generation semiconductor TCAD (technology computer-aided design) system, protein structure/function analysis system, fatigue simulation system, next-generation fluid analysis system, chemical reaction simulator, grid computing, and a nanodevice surface analysis system. (NEDO)

  6. Report of 'Survey on Asian environmental information networks'; 'Asia kankyo joho network chosa' ni kansuru hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1994-03-01

    This project is implemented to survey the current statuses and future trends of the Asian district environment-related information networks, for the (research cooperation project for development of environmental condition measuring laser radar systems), being promoted by NEDO. First, current statuses of the network names, managing organizations, user numbers, conditions of use, protocols for use, service conditions, major domestic nodes and internationally connected conditions are surveyed mainly for internet-connected networks, for surveying the current statuses and future trends of the research networks in Asian countries. Second, current statuses in Indonesia of the network names, managing organizations, user numbers, conditions of use, protocols for use, service conditions, domestic node sites and managing organizations, charge systems and institutions, types/reliability/ stability of the circuits, and conditions of restriction of use, if any, for surveying the current statuses and future trends in Indonesia. Third, conditions of and needs for network utilization by researchers for Asian district environments. (NEDO)

  7. Investigation into the emission of greenhouse effect gases; Onshitsu koka gas no haishutsu ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    The paper grasped the situation of greenhouse effect gas emissions of advanced countries based on the reports from them. The advanced countries which concluded the U.N. Framework Convention on Climate Change (OECD member countries, the former U.S.S.R., and East European countries) are to be reported to the office concerned with work for the framework the situation of their greenhouse effect gas emissions according to the obligation of the framework. In and after April 1997, they made the second report. The paper summarized changes in emission amount, the future trend, and the policies/measures mainly taken of nine countries which have already presented the second report (the U.S., the U.K., Germany, Holland, Italy, Norway, Sweden, Finland, and New Zealand) and one country (Russia) which has made only the first report. Moreover, the literature was collected and summed up concerning the mechanism and coefficients of the emission of nitrous oxide and methane. The collected literature was classified into all fields/plural number of fields, energy relation, industrial process relation, relation with the use of organic solvent and other products, agricultural relation, relation with changes in land use and forests, and waste relation. 4 figs., 228 tabs.

  8. Advanced technology trend survey of micromachines in Europe; Oshu ni okeru micromachine sentan gijutsu doko chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-02-01

    In this research survey, the development trend of micromachine technology in Europe was surveyed, development level of micromachine technology of European companies was grasped, and practical application fields of their target were investigated. Technology development level of private companies in Japan`s national projects and practical application fields of Japan`s target were arranged. Trends of micromachine technology development are compared between Japanese companies and European companies. Among micromachine technology development projects in Europe, ``8520 MUST`` is a part of the ESPRIT Project. About 40,000 companies among about 170,000 companies in whole Europe are relating to the MUST Project. The main fields include the manufacturing technology, process control of machines, technology of safety, sensor technology in environmental fields, and automotive technology. The marketing fields of application include the automobile, military technology, home automation, industrial process, medical technology, environmental technology, and games. The results can be compared with the direction of research and development in Japan. 22 figs., 8 tabs.

  9. Investigation research on autonomous responsive materials; Jiritsu oto zairyo ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    A survey was made on autonomous responsive materials as a new material which reversibly change molecular structures and the aggregation state according to external stimuli. Autonomous responsive materials imitate environmental responsibility in the living organism system and have sensing, control and active functions for external stimuli. The materials are highly efficient and environmentally friendly. In biomimetic materials for soft actuators, drastic changes by temperature of elastic modulus of water-swollen hydrogel are used to the motion. In order to molecularly design stimulus-responsible polymer gel, studied are the relation between the micro structure and stimulus responsibility, dynamic correlation between the micro structure and the macro structure, etc. In the biomedical field, new cure and diagnosis using innovative materials are expected, and the application of autonomous responsive materials to the field is studied. For example, using hydrogel responding the temperature and the surface and controlling by temperature the interaction with components of the organism such as protein and cells, drug delivery in the organism is optimized. Also studied is the application of hydrophilic/hydrophobic changes by temperature to the chromatography. 215 refs., 47 figs., 11 tabs.

  10. Survey on commercial use of fuel cells; Nenryo denchi ni kansuru jitsuyoka no tame no chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    The basic survey was carried out for the future approach to R & D of fuel cells. Phosphoric acid fuel cell (PAFC) is in the stage of demonstration research and field test supported by subsidy after the end of Sunshine project. Its reliability and durability problems are being solved, and its cost reduction is only one problem for practical use. Distributed systems or on-site systems will be used utilizing its excellent environmental characteristics. Molten carbonate fuel cell (MCFC), solid oxide one (SOFC) and polymer electrolyte one (PEFC) under development were thus surveyed. The following are surveyed: (1) Contribution to a human society such as improvement of energy demand/supply structure and environmental protection, (2) Technological items such as outlook for R & D, validity of developmental issues, comparison between various R & D and significance in industrial promotion, (3) Economic items such as profitability and feasible period, and (4) Social items such as sociability, compatibility to needs, possibility of locations, international meaning, market scale and promotion scenario. 90 refs., 67 figs., 96 tabs.

  11. Survey on development of brown coal liquefaction techniques; Kattan ekika gijutsu ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1980-09-01

    Described herein are results of literature survey on brown coal liquefaction reactions and elementary techniques. Liquefaction of brown coal in the presence of CO and steam, or CO, H{sub 2} and steam has been investigated. It is not clear by the literature survey whether it is superior to the normal process which uses hydrogen. Brown coal contains moisture at high contents, and the drying techniques are necessary to be developed for its liquefaction. The future coal liquefaction plant will be much larger than the past one, and there are a number of problems to be solved, such as those involved in the designs of large-sized high-pressure slurry pumps, heat exchangers and preheaters. It is also necessary to develop the materials of and production techniques for large reactors which are serviceable under severe conditions. The solid-liquid separation for liquefaction products involves a number of the elementary techniques characteristic of coal liquefaction processes, and needs many technological developments. The one-stage brown coal liquefaction process is compared with the two-stage process for the secondary hydrogenation of SCR, but no clear conclusions are reached. (NEDO)

  12. Survey of Joint Implementation activities in China; Chugoku ni okeru kyodo jisshi katsudo kanren chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    It is a large task for Japan to positively promote the Joint Implementation activities related to the United Nations Framework Convention on Climate Change. Rapid increase in the emission of greenhouse-effect gases, especially CO2, is predicted in China with remarkable economic growth and population of 1.2 billion. It is essential to promote the Joint Implementation activities in China. In this survey, framework, organization, problems and tasks were investigated to effectively promote the Joint Implementation activities in China. Construction of framework for the real Joint Implementation activities has been proposed. Current problems for promoting the Joint Implementation activities in China are that the distinct guideline for the Joint Implementation is not established in the government, that the receiving system including receiving, planning and arranging sections is not established, and that the burden problems for the costs of project evaluation, data acquisition, monitoring, and verification are not solved. 5 refs., 21 figs., 6 tabs.

  13. Study of the O2/CO2 combustion technology; Sanso nensho gijutsu ni kakawaru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Kato, M [Center for Coal Utilization, Japan, Tokyo (Japan); Kiga, T; Yamada, T [Ishikawajima-Harima Heavy Industries Co. Ltd., Tokyo (Japan); Arai, K [Nippon Sanso K.K., Tokyo (Japan); Mori, T [Inst. of Research and Innovation, Tokyo (Japan); Kimura, N; Okawa, M [Electric Power Development Co. Ltd., Tokyo (Japan)

    1996-09-01

    This study is being progressed during a period from 1992 to 1999 as part of the NEDO`s clean coal technology program. This paper describes what has been discussed to date. The absorption method and the adsorption method may be used to recover CO2 as means to deal with the problem of global warming resulted from burning coals. These methods, however, have problems in economy caused from concentration of CO2 in flue gas being low. The present study is intended to raise the CO2 concentration in flue gas by using oxygen plus circulated flue gas in the place of combustion air, so that CO2 may be recovered as it is without being separated from the flue gas. Therefore, an oxygen-blown pulverized coal fired power generation plant having a cryogenic oxygen manufacturing equipment was designed to discuss the plant operability and economy, and the pulverized coal combustion technology by using a dynamic simulation. A large number of findings have been obtained already, and the study has reached a level at which grasping the whole image is now possible. 13 figs.

  14. Research for a database of alternative energy technologies; Miriyo energy ni kansuru data shu sakusei chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    The paper collects and arranges data on the unused energy in terms of examples of the introduction in Japan and other countries, policies, laws and rules, subsidy systems, etc. In the overview of the system, described was typical heat supply systems utilizing unused energy. As to concrete examples of the introduction in Japan, the examples were arranged by unused energy source, by temperature level, and by region, and a detailed data book of the typical introduction examples was made. As to examples overseas, data were arranged on the introduction mainly in Europe and the U.S. With relation to policies, laws and rules, and subsidy systems in Japan and overseas, investigated were policies, laws and rules, and subsidy systems concerning unused energy mostly in Japan, Europe and the U.S. As to the production quantity, the actual amount of introduction, and the predicted amount of introduction, survey on the effect and arrangement of the data were conducted in terms of typical two heat supply facilities utilizing unused energy. The paper adds information pertaining to the cost, main related companies and groups, the distribution cost, etc.

  15. Survey of energy load leveling system in Europe; Energy fuka heijunka taisaku ni kansuru Europe chosa

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, Y. [Setsunan University, Osaka (Japan). Faculty of Engineering

    1998-05-05

    This paper describes the survey of energy load leveling systems in Europe. In Denmark, especially regional heating is remarkably diffused, and they have 350 plants. With extending the service areas, the energy load leveling has been promoted. For the cogeneration plants of SK Power, the largest electric power company, they have hot water heat storage tanks for regional heat supply with a total capacity 2,200 MWh. The regional heating system in Goeteborg City of Sweden supplies 80% of the total heat demand of the city. Unused energy sources derived from petroleum refining, sewage treatment, and garbage burning are utilized. In Uppsala, they have seasonal heat storage systems using solar heat. The Vienna Regional Heat Supply Corporation supplies heat equivalent to 5,000 GWh a year. Cogeneration plants and garbage burning plants are used as heat sources, and 25% of the total heating in the city is supplied. In Austria, they have an electric power demand with a peak in winter, and they have a pumped-storage power station in Kaprun for the annual load leveling using dump power in summer. This paper also introduces a compressed air storage gas turbine plant at Huntorf of Germany, and a large-scale underground natural gas storage of Gaz de France. 6 figs.

  16. Research report for establishment of NEDO vision; NEDO vision no sakutei ni muketa chosa kenkyu hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    Because of an increase in energy demand due to economic growth and industrial structure change in the Asian area and its effect on global environment, the economic evolution harmonizing with energy and environment (3E) of the Asian area is required. The role of Japan, in particular, NEDO for achieving such 3E was studied from an international viewpoint. The following are thus surveyed: The history of energy demands, economic growth, an increase in energy consumption and their effect on global environment in the Asian area, and the policies, measures and future plans of Asian countries corresponding to the above situations. The role of NEDO is first of all R & D of biomass toward practical use, and development of effective use technology of biomass energy. Positive approach to control of CO2 emission and immobilization of CO2 is also required in industrial and traffic fields. As technology transfer from Japan, promotion of joint researches and establishment of an economic support scheme are expected together with transfer of the basement technology and training. 79 figs., 13 tabs.

  17. Research on harmonized molecular materials; Bunshi kyocho zairyo ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    Harmonized molecular materials (HMM) were researched to create functional materials adaptable to needs such as environmental harmony and high-efficient conversion in post-industrial society and aging society. Superior mechanisms function efficiently in organisms for perception, transmission and processing of information, and transport and conversion of substances. These functions are caused by harmonization between organic molecules, or organic molecule and metal or inorganic substance. HMM is a key substance to realize these functions similar to those of organisms artificially. It is the purpose of this research to develop HMMs, reform production process by innovating separation and conversion technologies, and finally realize molecular chemical plants. This research also develops high-efficient devices to contribute to the information society, and progresses the industry of bio-functional materials such as high-sensitive bio-sensor. The functions, applications and creation technologies of three kinds of HMM such as assembly, mesophase and microporous materials were researched in fiscal 1995. 956 refs., 128 figs., 13 tabs.

  18. Research study on harmonized molecular materials (HMM); Bunshi kyocho zairyo ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    As functional material to satisfy various needs for environmental harmonization and efficient conversion for information-oriented and aging societies, HMM were surveyed. Living bodies effectively carry out transmission/processing of information, and transport/conversion of substances, and these functions are based on harmonization between organic molecules, and between those and metal or inorganic ones. HMM is a key substance to artificially realize these bio-related functions. Its R & D aims at (1) Making a breakthrough in production process based on innovation of material separation/conversion technology, (2) Contribution to an information-oriented society by high-efficiency devices, and (3) Growth of a functional bio-material industry. HMM is classified into three categories: (1) Assembly materials such as organic ultra-thin films (LB film, self-organizing film), and organic/inorganic hybrid materials for optoelectronics, sensors and devices, (2) Mesophase materials such as functional separation membrane and photo-conductive material, and (3) Microporous materials such as synthetic catalyst using guest/host materials. 571 refs., 88 figs., 21 tabs.

  19. Survey and research on precision polymerization polymeric materials; Seimitsu jugo kobunshi zairyo ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    Survey and research on the precision control of primary structure of polymeric materials and the precision evaluation technology have been conducted to develop advanced polymeric materials. It is proposed that the three basic processes of polymer synthesis, i.e., addition, condensation, and biomimesis, in forming the precision polymerization skeleton are to be covered through a centralized joint research effort with participation of industry, academia, and the government institute and under the leadership of researchers from academic institutions as the team leaders. For the study of technology trends, international conferences held in UK, Germany, and Hawaii are introduced, and domestic meetings, i.e., Annual Polymer Congress and Polymer Conference, are summarized. In addition, Precision Polymerization Forum and International Workshop on Precision Polymerization were held. The basic studies include a quantum-chemical elucidation of the elementary process in polymerization reaction, time-resolved analysis of polymerization process and polymer properties, synthesis of polymers with controlled microstructures by coordination polymerization using metal complexes, synthesis of polymer with controlled microstructures by precision polycondensation, molecular recognition in catalyst-reaction site, and synthesis of imprinting polymers. 246 refs., 117 figs., 14 tabs.

  20. Recent surveys and researches on pollinosis in Japan; Kafunsho ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Shido, T. [The Inst. of Public Health, Tokyo (Japan)

    1998-05-31

    In this paper, recent investigations and researches on pollinosis are summarized as centering on the investigation entrusted by the Ministry of Health and Welfare and executed since 1992, and especially the surveys on Japanese cedar pollinosis during 1995 to 1996. The quantity of pollen surveyed in 1995 is the greatest in the survey history of nationwide flying pollen. Particularly, the quantity of cedar and hinoki pollen is 10 to 40 times as many as that in the year before. Consequently, since the sensitization and onset due to the cedar pollen increased greatly, the objects of the surveys and the researches were mainly in respect to the analysis of onset factors of pollinosis, clarification of its natural process, evaluation on the effectiveness of desensitization therapy, the clinical subjects including the confirmation of pharynx symptom and asthma symptom, and the discovery of naturally sensitizing dog. A fact that the quantity of flying pollen concerns the occurrence and degree of the clinical symptom has already been indicated by a clinical observation carried out for a long period of time. In respect to specific prophylaxis and therapy, for the first time the pollen masks and glasses sold on the market are investigated, and the necessity of the verification thereof is described. 27 refs., 7 figs., 5 tabs.

  1. Investigations on steel slag re-utilization in developing countries; Hatten tojokoku ni okeru tekko slag sairiyo ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    In order to promote steel slag re-utilization in developing countries, a possibility was presented for technical cooperation to India, Indonesia and Thailand upon putting the status of slag utilization in Japan into order. Blast furnace slag produced in Japan (having a re-utilization rate of 95%) is re-utilized and processed as cement aggregates and road beds, and converter slag as civil engineering materials and ores. Steel making slag (having a re-utilization rate of 80%) is re-utilized as road, processing and civil engineering materials. Since the steel making slag faces intensifying competition with ash made by incinerating construction and general wastes, it is important to improve its price competitiveness or mixed utilization with other materials. Re-utilization has not advanced to a recognizable level in developing countries because of having no difficulty for availability of lands for wastes. However, growth of full-scale steel industries and elevation in tendency of environment preservation now urge increase in the slag re-utilization rate. Required to achieve the goal would include wider use of re-utilization technologies, quality control on slag, joint use of facilities to produce re-utilization products, and governmental assistance on burdens of transportation cost. Assistance from Japan is expected to help meet these requirements. 25 figs., 31 tabs.

  2. Measurement of Activity Coefficients of Solvents in Poly ( ethylene oxide ) Using Gas-Chromatographic Method and Correlation by Polymer-ASOG; Poriechirenokishido chu no yobai katsuryo keisu no gasukuromatogurafu ho ni yoru sokutei to Polymer-ASOG ni yoru sokan

    Energy Technology Data Exchange (ETDEWEB)

    Tochigi, K.; Kurita, S.; Ohashi, M. [Yuki Gosei Kogyo Co. LTd., (Japan); Kojima, K. [Nihon University, Tokyo (Japan). Department of Industrial Chemistry

    1997-09-01

    Infinite dilution activity coefficients (353.15-393.15 K) of six solvents (benzene, toluene, p-xylene, cyclohexane, acetone and methylethylketone) and activity coefficient at finite concentrations (353.15 K, 373.15 K) of these solvents in poly (ethylene oxide) are measured using gas-chromatographic method. The experimental data are then correlated by a polymer-ASOG model. 18 refs., 2 figs., 3 tabs.

  3. Distribution of strong ground motion from uppermost crustal structure. Comparison with disaster from the Hyogo-ken Nanbu Earthquake; Yaya fukai chika kozo no henka ni yoru kyoshindo bunpu. Hyogoken nanbu jishin ni yoru higai bunpu tono hikaku

    Energy Technology Data Exchange (ETDEWEB)

    Zhao, Z; Okubo, R [Kawasaki Geological Engineering Co. Ltd., Tokyo (Japan)

    1997-10-22

    It was intended to elucidate characteristics of distribution of damages caused by an earthquake which occurs directly below an urban area. Therefore, numerical simulation using the pseudo-spectral method was performed on characteristics of seismic wave propagation in non-homogenous media composed of rock beds and sediment beds, and of seismic wave amplitudes on ground surface. The simulation has utilized information on underground structures disclosed by using the latest physical exploration method. The underground structure model assumed a two-dimensional model hypothesizing presence of upper, middle and lower beds in the Osaka bed group on granite, using as reference the information on S-wave velocity underground structure revealed by the microtremor exploration method. With an objective to elucidate characteristics of distribution of collapse ratio in the area from 8-chome, Okamoto, Higashinada Ward, Kobe City to 2-chome of Sakanasaki Minamicho, as damages suffered from the Hyogo-ken Nanbu Earthquake, a simulation has been performed varying the structure model based on the results derived by the microtremor exploration method and the reflection method. As a result, it was shown that the characteristics of the maximum amplitude distribution of displacement of ground surface, velocity and acceleration agree well with those of the collapse ratio distribution, and that the simulation using the pseudo-spectral method is an effective means to analyze the ground surface collapse ratio distribution. 5 refs., 3 figs.

  4. Surface flaw detection by means of infrared radiometer. Part 3. ; Detection limit influenced by an environment temperature. Sekigai hoshakei ni yoru hyomen kekkan no kenshutsu. 3. ; Shuhen ondo ni yoru kenshutsu genkai no eikyo

    Energy Technology Data Exchange (ETDEWEB)

    Okamoto, U; Kaminaga, F [Ibaraki University, Ibaraki (Japan). Faculty of Engineering; Ishii, T [Ibaraki University, Ibaraki (Japan); Eto, M; Ooka, N; Kanaya, K; Eto, Y [Japan Atomic Energy Research Institute, Ibaraki (Japan); Kurokawa, T [Nippon Denki Sanei Ltd. Co., Tokyo (Japan)

    1990-12-20

    Measuring a radiation energy distribution around surface flaw by means of a infrared rediometer can detect fine flaw on the surface. The characteristics were examined using a light quantum type radiation thermometer consisted of Hg-Cd-Te as a sensor. A surrounding wall consisted of a black body wall was installed between the sensor and test piece, and by thus maintaining the surrounding wall temperature constant, reflection energy from the test piece surface was maintained constant for stabilized measurement. The measurement values are the sum of energies from emission and reflection, or the so-called radiosity values. To avoid effects from the reflection to reduce variance in the emissivity, it is necessary to keep the surrounding wall temperatures lower by more than 20 {degree}C than the test piece radiation temperatures. Emissivity can be calculated from the rediositivity (sum of the radiation and the reflection), the surrounding wall temperatures, and the test piece radiation temperatures. If the surface is rough, variance in the measurements increases. The larger the difference in the test piece and surrounding wall temperatures, the thermo image of the defects on the test piece surface becomes more distinctive, thus the detection limit can be enhanced. 7 refs., 13 figs.

  5. Wavefield analysis in inhomogeneous media by wavelet transform; Wavelet henkan ni yoru fukinshitsu baitai no hadoba kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Matsushima, J; Rokugawa, S; Kato, Y [The University of Tokyo, Tokyo (Japan). Faculty of Engineering; Yokota, T; Miyazaki, T [Geological Survey of Japan, Tsukuba (Japan); Ichie, Y [The University of Tokyo, Tokyo (Japan)

    1996-10-01

    Data processing techniques have been investigated for clarifying structures and physical properties of geothermal reservoirs in the deep underground by seismic exploration using multiple wells. They include the initial motion time-distance tomography, amplitude tomography, diffracted wave tomography, and structure imaging using reflected wave or scattered wave. When applying these data processing methods to observed records, weak and minor signals essentially required are canceled due to averaging the analytical fields. In this study, influence of inhomogeneous media on the wavefield was evaluated. Data were analyzed considering frequency by using wavelet transform by which time-frequency can be easily analyzed. From the time-frequency analysis using wavelet transform, it was illustrated that high frequency scattered waves, generated by scatterer like cracks or by irregularity on the reflection surface, arrive behind direct P-wave and direct S-wave. 5 refs., 8 figs.

  6. Causality analysis of alpha activities by multidimensional directed coherence; Tajigen yuko coherence ni yoru {alpha}ritsudo no ingasei kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Sakata, O.; Shimada, N.; Shiina, T. [University of Tsukuba, Tsukuba (Japan); Saito, Y.; Imanishi, N.

    1998-07-01

    Alpha activities as a basic component of EEG (electroencephalogram) are mainly observed with eye-closed and reported state, and indicates rhythmic and diffused pattern on the scalp. Therefore analysis of the relation among many sequences of alpha activities measured at different positions on the scalp is expected to be useful not only for diagnosing psychiatric but also for investigating mechanism of brain information processing by means of causality analysis that is, macroscopic estimation of flow pattern within brain. Although coherence analysis has been proposed as a method for estimating the direction and magnitude of information flow between two sequences, superposition of results for each pair of sequences can not represent true relation among the whole sequences. In this paper, we proposed the multidimensional directed coherence analysis by modifying two-channel formula in order to apply it to the analysis of multi-channel sequence of alpha activities. Results of simulation revealed that multidimensional directed coherence can indicate more quantitatively the relation among the multi-channel sequences compared with conventional two-channel formula. Moreover, the proposed method was applied to the analysis of EEG data of normal volunteer and patient. Results show the method can provide a useful diagnostic information by assessment of the signal flow pattern within brain. 16 refs., 10 figs.

  7. Synthesis of Monodispersed Spherical Single Crystalline Silver Particles by Wet Chemical Process; Shisshiki kagakuho ni yoru tanbunsankyujo tankesshoginryushi no gose

    Energy Technology Data Exchange (ETDEWEB)

    Ueyama, Ryousuke.; Harada, Masahiro.; Ueyama, Tamotsu.; Harada, Akio. [Daiken Chemistry Industry Corporation, Osaka (Japan); Yamamoto, Takashi. [National Defence Academy, Kanagawa (Japan). Dept. of Electrical Engineering; Shiosaki, Tadashi. [Nara Institute of Science and Technology, Nara (Japan). Graduate School of Materials Science; Kuribayashi, Kiyoshi. [Teikyo University of Science and Technology, Yamanashi (Japan). Dept. of Materials

    1999-01-01

    Ultrafine silver monodispersed particle were prepared by wet chemical process. To decrease the reduction speed, an important factor in generating monodispersed particles is to control the following three factors: synthesis temperature, concentration of aggregation-relaxing agent added, and concentration of silver nitrate solution. Synthesis of monodispersed spherical Ag particles, used as metal powders for electrode, became possible using the nucleus grouwth reaction method. This process also allowed the control of the diameter of the powder particles. The silver particles were distributed in ta narrow particle diameter range with on average of 0.5 {mu}m. Transmission electron microscopy (TEM) revealed that single-crystalline silver particles were prepared by the present method. (author)

  8. Removal of chemical substances from the atmosphere by photocatalysis; Hikarishokubai ni yoru kiso kagaku busshitsu no jokyo

    Energy Technology Data Exchange (ETDEWEB)

    Takeuchi, K; Kutsuna, S [National Institute for Resources and Environment, Tsukuba (Japan)

    1996-01-25

    Suppression at a source is the principle of suppressing air pollution caused by vapor phase chemical substances. For the case of these substances with extremely low concentrations, discussions were given on decomposition by means of photocatalysts (that utilize solar light) to directly purify them in the atmospheric condition. Catalysis takes place in providing and receiving electrons, that is, oxidation and reduction of the electrons, under light irradiation by using photocatalysts in which light excites and causes internal electrons to migrate freely. Titanium oxide was found effective because it is high in catalytic activity, stable chemically, and harmless. Photodecomposition reaction of chlorinated organic compounds on TiO2 proceeds very fast except for fluorocarbons. In practical use, the catalyst must be fixed so that no catalyst powder will scatter around. Porous TiO2 sheets were, therefore, manufactured using fluorine resin as a binder. The sheets were used to have removed successfully NOx, SO2 and low-grade aldehyde with concentrations from 0.01 to 10 ppm (corresponding to gases discharged from a tunnel). Since the catalyst can function even under solar light, it can remove NOx during daytime, and can be regenerated by precipitation (passive environment purification). The catalyst was verified effective when used on roads in urban areas. 16 refs., 9 figs., 3 tabs.

  9. Acetaldehyde formation from ethanol over titanium dioxide photocatalyst. Nisanka titan hikarishokubai ni yoru ethanol kara no acetaldehyde no seisei

    Energy Technology Data Exchange (ETDEWEB)

    Iseda, K [Government Industrial Research Institute, Nagoya, Nagoya (Japan)

    1990-02-20

    The suspention of TiO {sub 2} (rutile structure, 99.9%, 300 mesh) photocatalyst in ethanol was irradiated under ultraviolet light in an argon atmosphere at 25 centigrade. Acetaldehyde, methane and hydrogen were detected as products. When the photocatalysis of TiO {sub 2} itself was examined comparing with the result of blank test without using catalyst, the activity of TiO {sub 2} was confirmed only for the formation of acetaldehyde among the products. The yields of acetaldehyde increased with increasing addition of catalyst. The increasing rate of methane yields was rather small and the methane yields were lower than those in the blank tests. The hydrogen yields were almost same as in the blank tests. Acetal was formed in the blank test but was not formed with addition of TiO {sub 2}. It was provided that TiO {sub 2} was an effective catalyst for the formation of acetaldehyde. 6 ref., 5 figs.

  10. Three dimensional reflection velocity analysis based on velocity model scan; Model scan ni yoru sanjigen hanshaha sokudo kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Minegishi, M; Tsuru, T [Japan National Oil Corp., Tokyo (Japan); Matsuoka, T [Japan Petroleum Exploration Corp., Tokyo (Japan)

    1996-05-01

    Introduced herein is a reflection wave velocity analysis method using model scanning as a method for velocity estimation across a section, the estimation being useful in the construction of a velocity structure model in seismic exploration. In this method, a stripping type analysis is carried out, wherein optimum structure parameters are determined for reflection waves one after the other beginning with those from shallower parts. During this process, the velocity structures previously determined for the shallower parts are fixed and only the lowest of the layers undergoing analysis at the time is subjected to model scanning. To consider the bending of ray paths at each velocity boundaries involving shallower parts, the ray path tracing method is utilized for the calculation of the reflection travel time curve for the reflection surface being analyzed. Out of the reflection wave travel time curves calculated using various velocity structure models, one that suits best the actual reflection travel time is detected. The degree of matching between the calculated result and actual result is measured by use of data semblance in a time window provided centering about the calculated reflective wave travel time. The structure parameter is estimated on the basis of conditions for the maximum semblance. 1 ref., 4 figs.

  11. Evaluation of permeability of Nojima fault by hydrophone VSP; Hydrophone VSP ni yoru Nojima danso no tosuisei hyoka

    Energy Technology Data Exchange (ETDEWEB)

    Kiguchi, T; Ito, H; Kuwahara, Y; Miyazaki, T [Geological Survey of Japan, Tsukuba (Japan)

    1996-05-01

    The multi-offset hydrophone VSP experiments were carried out using a 750m deep borehole as the oscillation receiver, which penetrates the Nojima fault, to detect water-permeable cracks and evaluate their characteristics. Soil around the borehole is of granodiorite, and fault clay is found at a depth in a range from 623 to 624m. A total of 4 dynamite tunnels were provided around the borehole as the focus. The VSP results show that the tube waves are generated at 22 depths, including the depth at which fault clay is found. However, these waves are generated at only 6 depths in an approximately 150m long fracture zone, suggesting that the cracks in the zone are not necessarily permeable. It is also found that crack angle determined by the analysis of tube waves almost coincides with that of fault clay determined by the core, BHTV and FMI, and that permeability is of the order of 100md at a depth of fault clay or shallower. 3 refs., 2 figs., 2 tabs.

  12. Suppression of 3D coherent noise by areal geophone array; Menteki jushinki array ni yoru sanjigen coherent noise no yokusei

    Energy Technology Data Exchange (ETDEWEB)

    Murayama, R; Nakagami, K; Tanaka, H [Japan National Oil Corp., Tokyo (Japan). Technology Research Center

    1996-05-01

    For improving the quality of data collected by reflection seismic exploration, a lattice was deployed at one point of a traverse line, and the data therefrom were used to study the 3D coherent noise suppression effect of the areal array. The test was conducted at a Japan National Oil Corporation test field in Kashiwazaki City, Niigata Prefecture. The deployed lattice had 144 vibration receiving points arrayed at intervals of 8m composing an areal array, and 187 vibration generating points arrayed at intervals of 20m extending over 6.5km. Data was collected at the vibration receiving points in the lattice, each point acting independently from the others, and processed for the composition of a large areal array, with the said data from plural vibration receiving points added up therein. As the result of analysis of the records covering the data collected at the receiving points in the lattice, it is noted that an enlarged areal array leads to a higher S/N ratio and that different reflection waves are emphasized when the array direction is changed. 1 ref., 6 figs.

  13. Velocity structure of Nojima-fault by VSP method; VSP ho ni yoru Nojima danso no sokudo kozo

    Energy Technology Data Exchange (ETDEWEB)

    Kuwahara, Y; Ito, H; Kiguchi, T; Miyazaki, T [Geological Survey of Japan, Tsukuba (Japan)

    1996-05-01

    In order to investigate in detail structures of the fractured fault band, the VSP tests were conducted using a 750m deep borehole penetrating the Nojima fault in Awaji Island. The borehole penetrates the fault clay band at a depth of 624m in the Hirabayashi area. The offset VSP survey, conducted by the aid of hydrophone through the naked borehole, detects many characteristic phenomena resulting from the fault fracture. Largely fractured lithofacies are found by the core observation at a depth in a range from 557 to 673m. P-waves propagate at 4.6 and 5.1km/s above and below the fractured band, respectively. The fractured band is subdivided into 2 sections, both being of low speed of 4.5 and 3.1km/s. The X1 and X2 phases resulting from the fault fracture are also observed, above and below the fractured band. The causes for these wave phases are now under investigation. 4 figs.

  14. Three-dimensional TDEM modeling using integral equation method. 2; Sekibun hoteishikiho ni yoru TDEM no sanjigen modeling. 2

    Energy Technology Data Exchange (ETDEWEB)

    Noguchi, K; Endo, M [Waseda University, Tokyo (Japan). School of Science and Engineering

    1996-05-01

    A study was made about integral equation-assisted numerical calculation in a time domain electromagnetic (TDEM) 3D modeling. The total number of cells should be minimized now that the time required for calculation depends a great deal upon the total number of cells. On the assumption of a thin plate-like layer of anomaly in presence, with its center positioned just below the receiving point and with its entirety buried in a homogeneous 100 Ohm m medium, the correlation between the distance and the maximum cell length in the horizontal direction and the method of dividing were examined. As the result, it was found that a dividing method respecting the exponential function shortens the calculation time and that, for obtaining a true response and for minimizing the calculation time, the length of the horizontal side of the cell nearest to the transmission source needs be set to be not more than 1/2 of the distance. It was also found that the length of the side in the direction of depth of the topmost cell needs be set to be not more than approximately 1/3 of the depth of the upper surface of the plate-shaped anomaly. 2 refs., 10 figs., 2 tabs

  15. Manufacture of lightweight aggregates utilizing coal fly ash. Sekitan bai riyo ni yoru jinko keiryo kotsuzai seizo

    Energy Technology Data Exchange (ETDEWEB)

    Ishii, K [Kyushu Electric Power Co. Inc., Fukuoka (Japan)

    1990-11-20

    Processing of a large amount of coal ash is a serious problem in considering the locational conditions of coal firing power generation plants. 46% of the coal ash was effectively used in 1985, and the remaining 54% was disposed at landfills on land and sea. Positive promotion of the effective use of coal ash is the necessity. A production method for an artificial lightweight aggregate utilizing coal ash was established by a joint research. The history of the research and development of this artificial lightweight aggregate (brand name: FA-lIGHT), outline of the manufacturing facilities, physical properties and result of use are introduced. The lightweight aggregates are used not only for the construction of multistoried buildings but also used as most suitable aggregates for making lightweight large scale panels and concrete secondary products such as lightweight blocks. FA-LIGHT is most suitable for use in the production of concrete lightweight aggregates, and can be used for hydroponic agriculture and for the improvement of drainage of land. Spread of its use is expected. 5 figs., 5 tabs.

  16. Structural study of synthetic polymers by MALDI-TOFMS; MALDI-TOFMS ni yoru gosei kobunshi no kozo kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Noguchi, K.; Hirayama, K. [Ajinomoto Co. Inc., Tokyo (Japan)

    1998-08-01

    As observation results on the time-dependent change in the ring-opening reaction of novolac epoxy resin with acetic acid by MALDI-TOFMS, the epoxy ring was opened with reaction time, the hydroxy group formed by the ring-opening reaction was acetylated, those components were measured. In the case of the FABMS/MS observation of materials and the reaction products, the estimation structure could be confirmed from the measured results of MALDI-TOFMS. In the polymerization of bisphenol A epoxy resin with N, N`-dimethylethylenediamine, it was observed by MALDI-TOFMS that many kinds of polymers with high molecular weight were formed with an increase of reaction time. In this case, the LSIMS/MS observation of materials and the reaction products was carried out, the estimation structure could be confirmed from the measured results of MALDI-TOFMS. 19 refs., 8 figs.

  17. Upgrading of brown coal by slurry-dewatering; Kattan no yuchu dassui ni yoru clean kotai nenryo no seizo

    Energy Technology Data Exchange (ETDEWEB)

    Okuma, O.; Shimizu, T.; Inoue, T.; Shigehisa, T.; Deguchi, T.; Katsushima, S. [Kobe Steel, Ltd., Kobe (Japan)

    1996-10-28

    This paper describes an outline of solid fuel production process from brown coal and the investigation results of its elemental techniques. Dried coal is produced by this process which consists of a dewatering of crushed brown coal in oil-based solvent, a solid and liquid separation of slurry, and a remained oil recovery by heating. This process is characterized by the higher thermal efficiency compared with usual drying and the restraint of spontaneous combustion of product coal. It was revealed that solid fuel with low moisture, low ash, low sulfur, and suppressed spontaneous combustion property can be produced from Australian brown coal through this process. From the comparison between kerosene and fuel oil A, it was confirmed that the oil content during dewatering was smaller and the oil recovery by heating was easier by using a solvent with lower boiling point. It was also confirmed that the spontaneous combustion property can be suppressed using small amount of asphalt by solving asphalt in the solvent and adsorbing asphalt on the surface of brown coal. From these results, low rank coals including brown coal, which are difficult to use, are expected to be used as clean coal with low ash and low sulfur through this process. 2 refs., 7 figs., 2 tabs.

  18. Method for analyzing electromagnetic-force-induced vibration and noise analysis; Denjiryoku reiki ni yoru dendoki no shindo hoshaon kaisekiho

    Energy Technology Data Exchange (ETDEWEB)

    Shiohata, K.; Nemoto, K.; Nagawa, Y.; Sakamoto, S.; Kobayashi, T.; Ito, M.; Koharagi, H. [Hitachi, Ltd, Tokyo (Japan)

    1998-11-01

    In this analysis method, electromagnetic force calculated by 2-dimensional analysis is transformed into external force for 3-dimensional structural-vibration analysis. And a modeling procedure for a vibrating structure is developed. Further, a space-modal-resonance criteria which relates electromagnetic force to structural-vibration or noise is introduced. In the structural-vibration analysis, the finite element method is used; and in the noise analysis, the boundary element method is used. Finally, vibration and noise of an induction motor are calculated using this criteria. Consequently, high-accuracy modeling is achieved and noise the calculated by the simulation almost coincides with that obtained by experiments. And it is clarified that the-space-modal resonance criteria is effective in numerical simulation. 11 refs., 9 figs., 3 tabs.

  19. Glass marking with diode-pumped Nd:YLF laser; Handotai reiki Nd:YLF laser ni yoru glass marking

    Energy Technology Data Exchange (ETDEWEB)

    Sakai, F.; Hayashi, K. [Sumitomo Heavy Industries, Ltd., Tokyo (Japan)

    1996-08-20

    The compact marking system based on a beam scanning system in which the fourth harmonic (FHG: 262 nm in wavelength) of a diode-pumped Nd:YLF (Nd:LiYf4) laser is used for the source of ultraviolet light is described. The result of application to the glass marking that caused a problem due to the generation of cracks is also explained. The machining characteristics significantly vary depending on the type of glass. During actual marking, sample processing must be beforehand carried out to optimize the processing conditions after confirming that there is no problem in practical use. For marking on the glass used for liquid-crystal board, it is valid to improve the density of a dot and increase the number of shots per dot for obtaining high visibility. However, cracks may occur in the clearance of each dot because of the thermal effect. Therefore, the processing conditions must be optimized according to the glass type and crack generation state. The generation of cracks can be suppressed by setting the processing conditions to the optimum level. As a result, satisfactory marking is obtained. 8 refs., 6 figs.

  20. Adaptation of topology optimization on truck-structure; Kinshitsukaho ni yoru iso saitekika shuho no truck kozo eno tekiyo

    Energy Technology Data Exchange (ETDEWEB)

    Tachibana, H; Kojima, A; Chiba, S [Mitsubishi Motors Corp., Tokyo (Japan)

    1997-10-01

    An optimization using the homogenization method has been applied to a truck-structure on the concept design stage. A truck-structure is grouped into 3 classes (thin plate structure , thick plate structure and solid structure), then example, effectiveness and method for the application for the purpose of weight reduction , high rigidity and high eigen-frequency are introduced. 3 refs., 24 figs., 1 tab.

  1. Modeling of power train by applying the virtual prototype concept; Kaso genkei ni yoru power train no model ka

    Energy Technology Data Exchange (ETDEWEB)

    Hiramatsu, S; Harada, Y; Arakawa, H; Komori, S [Mazda Motor Corp., Hiroshima (Japan); Sumida, S [U-Shin Corp., Tokyo (Japan)

    1997-10-01

    This paper describes the simulation of power train that includes the model developed by applying the virtual prototype concept. By this concept, subsystem models which consist of functional model and mechanism models are integrated into a total system model. This peculiarity in architecture of model, which is called the hierarchical structure, enables us to model a system of large scale with many units, systems and parts easily. Two kinds of computer simulations are performed. One is engine revolution fluctuation by accessory load input, and the other is changing gears by automatic transmission. They are verified to have sufficient accuracy. 2 refs., 12 figs.

  2. Emission and combustion characteristics of multiple stage diesel combustion; Nidan nensho ni yoru diesel kikan no nensho to haishutsubutsu tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Hashizume, T; Miyamoto, T; Tsujimura, K [New A.C.E. Institute Co. Ltd., Tokyo (Japan); Kobayashi, S; Shimizu, K [Japan Automobile Research Institute, Tsukuba (Japan)

    1997-10-01

    A new concept of multiple stage diesel combustion was studied by means of engine test, combustion observation and numerical simulation, in order to reduce NOx emissions at high load conditions. With this concept, the premixed combustion occurs under the fuel lean conditions and the diffusion combustion occurs under the high temperature conditions. As seen in the result of combustion observation, a first stage combustion occurs with no luminous flame. A second stage combustion occurs with a luminous flame after very short ignition delay period. However the luminous flame is disappeared immediately. Because cylinder temperature is high, and hence soot oxidizes immediately. 5 refs., 11 figs., 1 tab.

  3. Investigation of iron current measurement to detect combustion quality; Ion denryu ni yoru nensho jotai kenshutsu no kento

    Energy Technology Data Exchange (ETDEWEB)

    Nakata, K; Mogi, K [Toyota Motor Corp., Aichi (Japan)

    1997-10-01

    The possibility and problems were investigated in detecting the combustion quality by means of ion current measured at the spark plug. The ion current has two peaks during one combustion stroke; first peak is generated by flame around the spark plug just after ignition and second one appears with the rise in temperature of burned gases. As the result of investigations, it was confirmed that the first ion peak might be useful to forecast the combustion quality, but it would be hard to practice owing to the spark duration. And the second peak offered the information of combustion chamber pressure. 4 refs., 12 figs., 1 tab.

  4. Defect detection of elevator wire rope by using wavelet analysis; Wavelet kaiseki ni yoru elevator rope no sonsho kenshutsu

    Energy Technology Data Exchange (ETDEWEB)

    Kaneda, M.; Kawata, A.; Hayashi, S. [Kansai University, Osaka (Japan). Faculty of Engineering; Tokui, K. [Mitsubishi Electric Building Techno-Service Co. Ltd., Tokyo (Japan)

    1998-10-31

    Detecting strand breakage and local wear of elevator wire rope uses currently a method using a rope tester. This method magnetizes a rope with electric magnet and detects defected part as leakage flux. Pulsed signals are issued from the defected part, variation in magnetic flux leakage due to rope swinging produces noise, and both get mixed together. Therefore, the detection is performed finally by visual check and palpation. This paper discusses a method that analyzes measurement data derived by the rope tester by using wavelet conversion, and detects the defected part automatically without being confused by noise. The pulsed signals generated from the defected part can be detected from noise by decomposing multiplex resolution using the Haar basis. As a result of the experiment, cases that may be overlooked in visual check because of S/N ratio being too small or the pulsed signals being too weak were all detected. 11 refs., 14 figs.

  5. High-speed conversion of carbon dioxide into methanol using catalyst. Shokubai ni yoru nisanka tanso no kosoku methanol ka

    Energy Technology Data Exchange (ETDEWEB)

    Inui, T. (Kyoto University, Kyoto (Japan). Faculty of Enineering)

    1993-02-01

    This paper describes high-speed conversion of CO2 into methanol. When a Cu-Zn-Cr-Al oxide-based catalyst (MSCp catalyst) prepared by using a sedimentation process used for synthesizing methanol from CO is applied to converting CO2 into methanol, the methanol yield decreases down to a several fraction of CO to methanol conversion, with a possibility of greater catalytic deactivation. If this catalyst prepared by using a homogeneous gelation process (MSCg catalyst) is used, the yield of methanol from CO2 increases by 240 plus percent over the case of using the MSCp catalyst, and no catalytic deactivation occurs at all during a use for ten and odd hours. Further, when La2O3 is added to the MSCg catalyst at 4% by weight, the methanol yield increases by about two times as much as the case without addition, and the temperature at which the maximum yield is achieved shifts to a lower temperature side by about 20[degree]C. Combining Ag or Pd with the MSCg catalyst provides the same effects. The paper touches on an attempt of high-speed CO2 conversion using this catalyst loaded with ceramic fibers. 15 refs., 5 figs., 2 tabs.

  6. Baking of the multi-itemed clinker by the large kiln; Ogata kirun ni yoru tahinshu kurinka no shosei

    Energy Technology Data Exchange (ETDEWEB)

    Kihara, Yasuhiro [Ube Industies, Ltd., Yamaguchi (Japan)

    1998-10-10

    In the Ube cement plant, it had 5 DB kilns, and it became a base of the special cement manufacture. However, the productivity difference with the special cement manufacture by the large kiln recently spread, and in the DB cairn, it was judged with the limit. Therefore, the rationalization which put together DB kiln of 5 in NSP kiln of 1 was carried out, while the role of the special cement manufacture base was maintained. In this paper, the outline of variety switching technology in large and single kiln of 1 for the multi-itemed and multi-itemed clinker production is introduced in this. (NEDO)

  7. Synthesis and chemical recycling of high polymers using C1 compounds; C1 kagobutsu ni yoru kobunshi no chemical recycle

    Energy Technology Data Exchange (ETDEWEB)

    Masuda, T. [National Institute of Materials and Chemical Research, Tsukuba (Japan)

    1997-09-01

    The paper outlined a study of the synthesis of high polymers using C1 compounds which are continuously usable chemical materials and the related compounds such as the derivatives, and also the chemical recycle. In the case of waste plastics mixed in urban refuse, effective is the chemical recycle where C1 compounds obtained by gasifying the mixed waste are used as high polymer material. For the synthesis and recycle of high polymers using C1 compounds, there are three routes: Route A (recycle via high polymer materials), Route B (recycle via C1 compounds and high polymer materials), and Route C including global-scale carbon recycle (recycle via carbon dioxide from biodegradable plastics using microorganism). Among high polymers, those that can be synthesized from C1 compounds, for example, polymethylene, polyacetal and polyketone can be chemically recycled by Route B. 30 refs., 2 figs., 1 tab.

  8. PWM pulse pattern optimization method using carrier frequency modulation. Carrier shuhasu hencho ni yoru PWM pulse pattern saitekikaho

    Energy Technology Data Exchange (ETDEWEB)

    Iwaji, Y.; Fukuda, S. (Hokkaido University, Sapporo (Japan))

    1991-07-15

    Sinusoidal inverters are getting more widely used keeping pace with the development of semiconductor switching elements. This paper discusses optimizing a PWM pulse pattern at an inverter output to drive an induction motor, proposes methods for improving distortion and torque ripples using a carrier frequency modulation (CFM), and describes a method for realizing the improvement through use of a single-chip microcomputer. The method defines evaluation parameters corresponding to the distortion and torque ripples, and optimizes the CFM depth to the parameters. The PWM pulse pattern has its voltage vector and time width so selected that the time integrated space vector of a three-phase voltage approaches a circular locus. Furthermore, the carrier frequency, that is the sampling frequency of the inverter, is also adjusted so that the above evaluation parameters are minimized. The addition of a new variable called the frequency modulation provides freedom in selecting an output characteristic as called for by the purpose. 12 refs., 18 figs.

  9. Toughened cyanate ester alloys via reaction-induced phase separation; Hanno yuhatsugataso bunkai ni yoru taishogekisei cyanate ester alloy

    Energy Technology Data Exchange (ETDEWEB)

    Hirohata, T.; Kuroda, M.; Nishimura, A. [Sumitomo Electric Industries, Ltd., Osaka (Japan); Inoue, T. [Tokyo Institute of Technology, Tokyo (Japan)

    1998-03-15

    For the purpose of toughening the matrices of fiber-reinforced plastics (FRPs), the effect of thermosetting/thermoplastic polymer alloys based on cyanate ester alloys is investigated. In the experiment, materials are heated and then allowed to set, which are mixtures of 87.0-43.5wt% of cyanate ester resin, 0-43.5wt% of epoxy resin, and 13.0wt% of soluble polyimide. FRP properties are examined by measuring the after-shock compressive strength, flexural elasticity and flaxural strength, and by performing morphology observation. It is then found that a cyanate ester/soluble polyimide system forms a polymer alloy with phase separation, that its glass transition temperature does not drop, and that the rupture strength is increased approximately twice. A carbon fiber-reinforced plastic (CFRP) incorporating this system is twice higher in after-shock compression strength than a CFRP incorporating a cyanate ester. The system withstands high temperatures, retaining at 200degC approximately 90% of the elastic modulus it exhibits at room temperature. 15 refs., 16 figs.

  10. Development of materials of `bekko work` using horn; Gyukaku riyo ni yoru bekko daitai zairyo no kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    Mori, S.; Nagata, S. [Technology Center of Nagasaki, Nagasaki (Japan); Sakoguchi, A. [Kumamoto Institute of Technology, Kumamoto (Japan)

    1996-11-10

    The technical art `Bekko` is one of the traditional technologies in Japan, and the materials of `Bekko` are shells of hawksbills. However, the industry of `Bekko Work` has been facing a crisis recently, because the import of turtleshell is restricted. We have therefore tried to develop new materials as substitutes for the turtleshell by utilization of horn. The noteworthy aspects in this study are as follows: (a) It has been clearly established that the horn could be reformed with amber color similar to that of turtleshell by chemical treatment using hydrogen peroxide (H2O2). (b) It is also of interest that we produced new materials like `Bekko` by mixing horn powder and turtleshell powder at the appropriate ratio and molding them in the temperature range of 110-120{degree}C. 1 ref., 6 figs., 3 tabs.

  11. Visual communication system among underwater robots and divers. Kaichu robot ya diver kan no shikaku ni yoru tsushin

    Energy Technology Data Exchange (ETDEWEB)

    Chiba, H. (East Japan Railway Co., Tokyo (Japan)); Ura, T.; Fujii, T. (The University of Tokyo, Tokyo (Japan). Institute of Industrial Science)

    1993-07-01

    Performing coordinated works between underwater robots and divers, often called undersea agents, requires communication means to promote mutual understanding. This paper describes a system to make visual communications as a communication means used under sea, and discusses elementary technologies to realize mutual communications between the agents. The visual communication system comprises a device to indicate command patterns that correspond to intentions to be communicated using five electroluminescence (EL) panels, a CCD camera, and a transponder. Discussions were given on image processing to recognize the command patterns, EL panel positions, and communication protocols. As a result of experiments assuming underwater communications between divers and robots, using a water tank, it was found that the command patterns can be recognized if illuminance in the water tank is 100 lux or lower. Validity of the system was verified in the experiments. 4 refs., 9 figs., 1 tab.

  12. Estimation of the charge quantity from solar cell to battery; Taiyo denchi ni yoru chikudenchi eno juden yosoku

    Energy Technology Data Exchange (ETDEWEB)

    Tsutsumi, K; Nishitani, M [Daiichi University, College of Technology, Kagoshima (Japan)

    1996-10-27

    In performing an experiment of running a small electric vehicle by installing solar cells in it and by charging the storage battery at a specific voltage, an estimation was made on the charge quantity to the battery for each solar altitude and inclination of a module at different hours. The solar altitude was determined at Daiichi University, College of Technology, according to the month and the time of day from a formula using day-declination and time equation of a chronological table of science. The quantity of global solar radiation was determined by resolving the solar radiation into its direct and diffuse components on the basis of the extra-terrestrial solar radiation quantity with the change in radius vector taken into consideration; and then, the global solar radiation on the inclined face was obtained from the angle of inclination and incidence. On the roof of a Daiichi University building, solar cell modules were installed facing north and south at 0{degree}, 30{degree}, 45{degree}, 60{degree} and 90{degree} each, so that a short-circuit current was measured for each differently inclined angle. As a result of the experiment, shown in an regression formula is a relation between the temperature conversion value of the maximum output of the solar cell at the standard temperature of 25{degree}C and the quantity of solar radiation on the inclined surface. Consequently, it enabled the prediction of a charging quantity, in the case of running a small vehicle with solar cells installed, from the quantity of solar radiation on the inclined surface in the clear weather. 2 refs., 4 figs., 2 tabs.

  13. Application of cytotoxicity test for toxic micropollutants. Saibo dokusei shiken ni yoru yugai kagaku busshitsu osen no hyoka

    Energy Technology Data Exchange (ETDEWEB)

    Utsumi, H; Hamada, A [Showa University, Tokyo (Japan). School of Pharmaceutical Science; Ono, Y [National Institute of Hygienic Sciences, Tokyo (Japan)

    1992-10-01

    Considerations were given from a viewpoint of assessing toxicity to human bodies on methods of assessing water pollutants and organisms, and applicability of cytotoxity test using cultured cells to water quality assessment. Biological assessment systems used for water environment may use tests using multicellular organisms, cells, or organelles in cells. The organism assessment method is intended mainly for assessing ecological effects, and a suitable method must be selected upon extrapolating it to human bodies. A toxicity parameter used most frequently in a cytotoxity test is the cell revival rate, and life and death are determined from liberation of enzymes in cells, or with color rejection tests and incorporation tests. There are a number of test specimens of raw tap water and its chlorine treatment condensate that show no mutagenicity but cytotoxity. Efficiencies of removal by means of mild chlorine treatment, fast filtration, and activated carbon adsorption vary greatly with cytotoxity and mutagenicity. Introducing the cytotoxity test is expected of further contributing to improving safety in water quality. 24 refs., 1 fig., 7 tabs.

  14. Electromagnetic analysis of HTSC by advanced fluxoid dynamics method; Kairyogata jisoku ryoshi doryokugakuho ni yoru koon chodendotai no denji kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Demachi, K.; Nakano, M.; Miya, K. [The Univ. of Tokyo, Tokyo (Japan). Graduate School of Engineering

    2000-05-29

    In this study, the improved fluxoid quantum dynamics method which applied the handling of the lattice in the lattice gas automaton method into the fluxoid quantum dynamics was developed. The saving of a memory capacity and the speedup of the calculation were carried out. Using a BSCCO single crystal which introduced a pinning center by the heavy ion irradiation as an analysis object, the validity of this technique was shown by the comparison with the experimental result. By the improved fluxoid quantum dynamics method, the space was made discrete by the triangular lattice in the two-dimensional system. The fluxoid quantum exists only on the lattice point, and received the force from the fluxoid quantum, the Meissner magnetic field and the pinning center in the circumference, and then moved to the 6 neighboring lattice points. Since the pattern of the positional relation of the fluxoid quantum was limited by the use of triangular lattice, the high-speed computation became possible by storing the interaction force into a database. The dependence for the radiation value of the torque in the axial type super-conductive magnet bearings was analyzed, and the possibility of the rotational loss control by the heavy ion irradiation was shown. (NEDO)

  15. Next-generation mass standard using the superconducting magnetic levitation method; Chodendo jiki fujoho ni yoru jisedai shitsuryo hyojun

    Energy Technology Data Exchange (ETDEWEB)

    Miki, Yukinobu; Shiota, Fuyuhiko; Fujii, Yusaku [National Research Laboratory of Metrology, Tsukuba (Japan)

    1999-10-25

    The Present mass standard based on the prototype of the kilogram has some serious problems such as surface contamination and unrecoverablity in the case of damage or loss. Research on monitoring and finally replacing the present mass standard are therefore encouraged and some approaches have been proposed. In this article, the superconducting magnetic levitation method, which is one of the approaches that also makes use of the unique properties of superconductivity, is reviewed together with a brief description about mass and electric standards. (author)

  16. Three-dimensional TDEM modeling using finite-difference method; Sabunho ni yoru TDEM ho no sanjigen modeling

    Energy Technology Data Exchange (ETDEWEB)

    Noguchi, K; Endo, M [Waseda University, Tokyo (Japan). School of Science and Engineering

    1997-10-22

    Study is made on the theory of three-dimensional modelling of TDEM (Time Domain Electromagnetic) method based on the theory of Wang and Hohmann. A difference scheme is built and investigation is conducted about calculation accuracy with attention paid especially to space and time division, and the obtained optimum value is compared with the analytical solution for a homogeneous medium. As the result, it becomes possible to have a high-accuracy TDEM response thanks to the obtained optimum parameter. In an example, a response is determined in the case of a high-resistivity body in presence near the ground surface. Calculation is performed under the given conditions of a medium 100 ohm/m in resistivity, anomalous bodies 200, 500, 1000, 2000,5000, and 10,000 ohm/m in resistivity, respectively, and a distance in the direction of depth of 20m. The result indicates that it is possible to estimate the effect of the ground surface terrain on a TDEM response. Since the effect of the ground surface terrain emerges at the initial part of a response, it is inferred that consideration of terrain is mandatory in building a model if it is for interpreting the subsurface structure in detail. 5 refs., 7 figs.

  17. Accuracy of parameters of permeable fractures by hydrophone VSP; Hydrophone VSP ni yoru tosuisei kiretsu no tokusei hyoka no seido

    Energy Technology Data Exchange (ETDEWEB)

    Kiguchi, T; Ito, H; Kuwahara, Y; Miyazaki, T [Geological Survey of Japan, Tsukuba (Japan); Yabuuchi, S; Hasegawa, K [Power Reactor and Nuclear Fuel Development Corp., Tokyo (Japan)

    1997-10-22

    Hydrophone VSP (vertical seismic profiling) experiment is under way as a technique for detecting subsurface water-permeable cracks by use of boreholes and for evaluating their characteristics (permeability index, crack direction, dip angle). In this report, tube waves observed by hydrophone VSP are subjected to analysis for the determination of water-permeable crack characteristics, the impact caused by errors in the value inputted for analysis is estimated, and a model calculation is performed in case there is no agreement between data from the borehole and data from VSP, all for examining the VSP records for accuracy. When an error rate of 15% is given to the tube wave/P-wave amplitude ratio, a change of 40% or lower results in the permeability index, and a change of 10deg or less in the dip angle, which means that an error in the amplitude ratio does not affect the analysis very much. Changes in the amplitude ratio resulting from changes in crack direction and dip angle differ, dependent on the offset rate. When angular differences among plural crack directions are within 90deg and dip angles within 60deg, the result of analysis represents the average characteristics of the plural cracks. 7 refs., 5 figs., 2 tabs.

  18. Reflector imaging by diffraction stacking with stacking velocity analysis; Jugo sokudo kaiseki wo tomonau sanran jugoho ni yoru hanshamen imaging

    Energy Technology Data Exchange (ETDEWEB)

    Matsushima, J; Rokugawa, S; Kato, Y [The University of Tokyo, Tokyo (Japan). Faculty of Engineering; Yokota, T [Japan National Oil Corp., Tokyo (Japan); Miyazaki, T [Geological Survey of Japan, Tsukuba (Japan)

    1997-10-22

    Concerning seismic reflection survey for geometrical arrangement between pits, the scattering stacking method with stacking velocity analysis is compared with the CDP (common depth point horizontal stacking method). The advantages of the CDP supposedly include the following. Since it presumes an average velocity field, it can determine velocities having stacking effects. The method presumes stratification and, since such enables the division of huge quantities of observed data into smaller groups, more data can be calculated in a shorter time period. The method has disadvantages, attributable to its presuming an average velocity field, that accuracy in processing is lower when the velocity field contrast is higher, that accuracy in processing is low unless stratification is employed, and that velocities obtained from stacking velocity analysis are affected by dipped structures. Such shortcomings may be remedied in the scattering stacking method with stacking velocity analysis. Possibilities are that, as far as the horizontal reflection plane is concerned, it may yield stack records higher in S/N ratio than the CDP. Findings relative to dipped reflection planes will be introduced at the presentation. 6 refs., 12 figs.

  19. Calculation of lobe mixer flow with reynolds stress model. Oryoku hoteishiki model ni yoru lobe mixer ryu no suchi keisan

    Energy Technology Data Exchange (ETDEWEB)

    Yamamoto, Makoto; Arakawa, Chuichi; Tagori, Tetsuo [Ishikawajima-Harima Heavy Industries, Co., Ltd., Tokyo (Japan) Univ. of Tokyo, Tokyo (Japan). Faculty of Engineering Univ. of Tsukuba, Tsukuba (Japan)

    1990-02-25

    It is considered that exhaust gas energy of turbofan engine is partly collected to realize the improvement of propulsion efficiency together with the reduction of noise appeared by the change in velocity distribution of exhaust gas flow. Then Lobe mixer was studied and its effectiveness was widely recognized, however the development of more realistic prediction method of exhaust nozzle system including Lobe mixer, is not completed yet. The stress equation model with low Reynolds Number which is easily used by the expansion of Launder Reece Rodi model in three dimension coordinate system was newly constructed. Applicability of the stress equation in more complicated flow field was greatly improved. While the above model was applied to Lobe mixer system, then the qualitative reproduction of mixing process accompanied with flow around Lobe and longitudinal eddy of core or bi-pass flow, was realized. There is room for improvement of pressure strain correlation term and behavior of Reynolds stress very close by wall surface in this model. 16 refs., 9 figs., 1 tab.

  20. Design and model experiments on thruster assisted mooring system; Futaishiki kaiyo kozobutsu no thruster ni yoru choshuki doyo seigyo

    Energy Technology Data Exchange (ETDEWEB)

    Nakamura, M; Koterayama, W [Kyushu Univ., Fukuoka (Japan). Research Inst. for Applied Mechanics; Kajiwara, H [Kyushu Institute of Technology, Kitakyushu (Japan). Faculty of Computer Science and System Engineering; Hyakudome, T [Kyushu University, Fukuoka (Japan)

    1997-12-31

    Described herein are dynamics and model experiments of the system in which positioning of a floating marine structure by mooring is combined with thruster-controlled positioning. Coefficients of dynamic forces acting on a floating structure model are determined experimentally and by the three-dimensional singularity distribution method, and the controller is designed by the PID, LQI and H{infinity} control theories. A model having a scale ratio of 1/100 was used for the experiments, where 2 thrusters were arranged in a diagonal line, one on the X-axis. It is found that the LQI and H{infinity} controllers of the thruster can control long-cycle rolling of the floating structure. They allow thruster control which is insensitive to wave cycle motion, and efficiently reduce positioning energy. The H{infinity} control regulates frequency characteristics of a closed loop more finely than the LQI control, and exhibits better controllability. 25 refs., 25 figs.

  1. Structural changes in deashed coals induced by heat treatment; Kanetsu shori ni yoru dakkaitan no kozo henka

    Energy Technology Data Exchange (ETDEWEB)

    Sugano, M.; Sekita, M.; Muramatsu, Y.; Mashimo, K.; Wainai, T. [Nihon University, Tokyo (Japan). College of Science and Technology

    1996-10-28

    Change in structures of 3 kinds of coals with different coal ranks and their deashed coals was studied by heat treatment below 200{degree}C. In experiment, crushed Adaro, Taiheiyo and Huaibei coals below 200mesh and their deashed coals were used as specimens. The coal and deashed coal specimens dried in vacuum at 110{degree}C for 3 hours were filled into an autoclave, and the heat-treated coal specimens were prepared by holding them under initial nitrogen pressure of 2kg/cm{sup 2} at a fixed temperature for 30min. Extraction using pyridine as solvent, volumetric swelling using methanol or benzene as solvent, and measurement of the amount of carboxyl and phenolic hydroxyl functional groups were conducted for these coal specimens. The experimental results are as follows. Huaibei coal has developed aromatic ring structure, and its structure is hardly affected by heat treatment. The oxygen containing functional groups decrease by heat treatment over 100{degree}C in Adaro coal and 150{degree}C in Taiheiyo coal, and PS, MQ and BQ also decrease due to aggregation between molecules. 5 refs., 2 figs.

  2. Prediction of DI diesel engine emissions by multidimensional simulation; Tajigen simulation ni yoru DI diesel engine no seino yosoku

    Energy Technology Data Exchange (ETDEWEB)

    Ishii, Y; Zhang, L; Hamaguchi, K; Minami, T; Yokota, K [Isuzu Advanced Engineering Center, Tokyo (Japan)

    1997-10-01

    To achieve the goal of using multidimensional simulation as a useful tool for predicting engine emissions in the stage of design or choice chamber shape and nozzle specifications, much work is needed to improve and modify calculation models. In this study , the spray model of KIVA-II have been modified using experimentally measured penetration of spray liquid phase. The modified KIVA-II was applied to a HSDI engine with different chambers and injectors. As a result of comparing with experiments, it was found that the KIVA-II using the modified spray model could relatively predict the change of emissions. 6 refs., 12 figs., 2 tabs.

  3. Effect and limitation of tuning accelerator pedal sensitivity by DBW; DBW ni yoru akuseru kando settei no koka to genkai

    Energy Technology Data Exchange (ETDEWEB)

    Takada, Y; Morita, S [Osaka City University, Osaka (Japan)

    1997-10-01

    DBW (Drive By Wire) system makes the constraint of direct connection between an accelerator pedal and the throttle valve free, so that optionally turning of throttle valve sensitivity becomes possible in automobiles driving. Reported here is the discussion of the effect and the limitation of this optionally tuning. As the former result, it became clear that the tuning method using torque signal and speed signal of the drive shaft, was easier than the method using only speed signal by PD control action. And as the latter result, upper limit was bound by the low gear ratio and tire spin. 2 refs., 11 figs.

  4. Confinement of solar thermal energy by Nesa film; Nesa maku ni yoru taiyo netsu energy no fujikome

    Energy Technology Data Exchange (ETDEWEB)

    Shimizu, A; Yano, K; Kasuga, M; Daigo, Y [Yamanashi University, Yamanashi (Japan). Faculty of Engineering

    1997-11-25

    This paper reports a Nesa (SnO2) film as selective transmissive film for effective confinement of solar thermal energy. Solar light spectrum ranges from 0.3 to 2.0{mu}m, while thermal radiation from bodies at 100-200degC is infrared ray more than 2{mu}m. Consequently, a solar water heater using the film which can pass rays below 2.0{mu}m while reflect rays over 2.0{mu}m for windows is very efficient. The Nesa film reflects rays with wavelengths more than plasma wavelengths (controllable from 1 to several {mu}m) by plasma action of free electrons. The Nesa films with different carrier densities were fabricated by spraying deposition method at dopant rates (Sb/Sn) from 0 to 2mol%. The solar water heaters were prepared using normal glass and specific glass coated with the Nesa film as selective transmissive film. The heater using the glass coated with the Nesa film of 2{mu}m plasma wavelength for windows could efficiently confine solar heat. The Nesa film of 700nm plasma wavelength which can pass visible light while reflect infrared ray was effective to reduce cooling/heating losses. 3 refs., 6 figs.

  5. Realization of an accelerator for environmental refreshment in case of soil; Fukyugata kasokuki ni yoru kankyo sosei eno koka

    Energy Technology Data Exchange (ETDEWEB)

    Isogai, H [Electrotechnical Laboratory, Tsukuba (Japan)

    1997-11-25

    Learning from a history of the earth of ancient times, the paper studies effects of refreshing environment and soil or making them natural and harmless mostly using primitive bacteria, and develops element technology which is industrially accelerating. The spread type accelerator working only by solar energy was installed and operated for experiment. As indices of refreshment effects, a study was comparatively made between a sugar degree of sweet potato and a yield shown in the number of potatotimesunit weight. An EM propagation garbage layer is formed, and the two sections were installed of a site of the actual installation of the spread type accelerator and a site naturally left alone. Other effects of weather, temperature and humidity which are external factors and general fertilization are offset as common modes, and a consideration was so made that only refreshment effects of primitive bacteria can be relatively compared. Acceleration effects in using accelerator for growing sweet potato could be quantitatively confirmed. As to sugar degree, because the last study was made in the beginning of summer, the underground temperature was high enough. Even only EM effects were fully effective. This time, the weather was much colder, and it was found to be a must to use accelerator. 2 figs.

  6. Monitoring of EOR operations by electrical prospecting. 2; Denki tansaho ni yoru sekiyu kyosei kaishuho no monitoring. 2

    Energy Technology Data Exchange (ETDEWEB)

    Ushijima, K; Mizunaga, H; Tanaka, T; Masuda, K [Kyushu University, Fukuoka (Japan). Faculty of Engineering; Tamagawa, T [Japex Jeoscience Institute, Tokyo (Japan)

    1996-10-01

    Fluid flow tomography (FFT) was applied to monitor the behavior of underground fluid in steam enhanced oil recovery (EOR) for oil sand reservoirs. FFT uses electrode arrangement of a mise-a-la-masse method, and continuously measures time variation in charged and spontaneous potential at various surface points to obtain realtime the images of underground seepage flow. It continuously measures ground surface potentials of 120 channels at intervals of 2s by applying alternative DC between a casing pipe and distant current electrode. It separates charged and spontaneous potential components, and converts them into time series data. It estimates the time and spacial distributions of seepage flow from time variation in spontaneous potential. It determines the change rate distribution of time-sliced apparent resistivity from charged potential to estimate the scale and area of seepage flow. As the experimental result, positive and negative electrodes in the change rate distribution were observed, and the direction connecting each electrode agreed with that of resistivity anomaly. FFT could observe realtime time variation in apparent resistivity due to steam injection. 9 refs., 7 figs.

  7. Monitoring of IOR/EOR operations by electrical prospecting; Denki tansaho ni yoru IOR/EOR monitoring

    Energy Technology Data Exchange (ETDEWEB)

    Ushijima, K; Mizunaga, H; Ikeda, H; Masuda, K [Kyushu University, Fukuoka (Japan). Faculty of Engineering

    1996-10-01

    Fluid flow tomography (FFT) was developed to monitor enhanced oil recovery IOR/EOR operations. This method uses a casing pipe as linear current source by connecting a current electrode with a well inlet, and the other electrode is grounded at a point far different from the well. Potentials are rapidly measured at the same time by multi-channel receiving electrodes installed on the ground to obtain time series data composed of charged potential and superimposed spontaneous potential. After separation of both potentials, the charged potential data are processed by the conventional mise-a-la-masse method to extract local anomaly, determine the residual distribution and relative change distribution of time-sliced apparent resistivity, and obtain the 3-D profile of fluid. The spontaneous potential is also processed to obtain the deflection distribution of time-sliced potential at a specific time. Quantitative 3-D interpretation is conducted focusing attention on the generation mechanism of spontaneous potential. Behavior of underground permeated flow is determined as time series animation images to image fluid direction. This method was effective in real fields. 8 refs., 4 figs.

  8. Resistivity structures imaging using time-domain electromagnetic data; TDEM ho ni yoru chika hiteiko kozo no imaging

    Energy Technology Data Exchange (ETDEWEB)

    Noguchi, K [Waseda University, Tokyo (Japan). School of Science and Engineering; Endo, M [Waseda University, Tokyo (Japan)

    1996-10-01

    The kernel function for transient vertical magnetic dipole was defined for semi-infinite uniform medium, and the 1-D imaging algorithm by TDEM (time-domain electromagnetic) method was developed for underground resistivity structure. Electromagnetic migration method directly images sectional resistivity profiles from the data observed by frequency-domain MT method, and determines underground resistivity profiles by integral equation of MT field using the concept of return travel time in reflection seismic exploration. The method reported in this paper is also one of the EM migration methods. The imaging algorithm of 2-D resistivity structure was developed by correcting 1-D imaging in consideration of the effect of 2-D anomaly on 1-D imaging (the resistivity of anomaly can be obtained from the resistivity contrast between anomaly and medium). The conventional methods require enormous forward computation, while this method can obtain underground resistivity structure in extremely short computation time, resulting in superior practicability. 12 refs., 7 figs.

  9. Development of low rank coals upgrading and their CWM producing technology; Teihin`itan kaishitsu ni yoru CWM seizo gijutsu

    Energy Technology Data Exchange (ETDEWEB)

    Sugiyama, T [Center for Coal Utilization, Japan, Tokyo (Japan); Tsurui, M; Suto, Y; Asakura, M [JGC Corp., Tokyo (Japan); Ogawa, J; Yui, M; Takano, S [Japan COM Co. Ltd., Japan, Tokyo (Japan)

    1996-09-01

    A CWM manufacturing technology was developed by means of upgrading low rank coals. Even though some low rank coals have such advantages as low ash, low sulfur and high volatile matter content, many of them are merely used on a small scale in areas near the mine-mouths because of high moisture content, low calorification and high ignitability. Therefore, discussions were given on a coal fuel manufacturing technology by which coal will be irreversibly dehydrated with as much volatile matters as possible remaining in the coal, and the coal is made high-concentration CWM, thus the coal can be safely transported and stored. The technology uses a method to treat coal with hot water under high pressure and dry it with hot water. The method performs not only removal of water, but also irreversible dehydration without losing volatile matters by decomposing hydrophilic groups on surface and blocking micro pores with volatile matters in the coal (wax and tar). The upgrading effect was verified by processing coals in a pilot plant, which derived greater calorification and higher concentration CWM than with the conventional processes. A CWM combustion test proved lower NOx, lower SOx and higher combustion rate than for bituminous coal. The ash content was also found lower. This process suits a Texaco-type gasification furnace. For a production scale of three million tons a year, the production cost is lower by 2 yen per 10 {sup 3} kcal than for heavy oil with the same sulfur content. 11 figs., 15 tabs.

  10. Fracture mapping in rock slope using geophysical instruments; Butsuri tansa ni yoru ganban shamennai no kiretsu bunpu hyoka

    Energy Technology Data Exchange (ETDEWEB)

    Kurahashi, T; Inazaki, T [Public Works Research Institute, Tsukuba (Japan); Watanabe, S [Geological Survey of Japan, Tsukuba (Japan)

    1997-05-27

    An attempt was made to visualize distribution of cracks in a rock slope by applying geophysical survey onto a rock slope. Geophysical logging and seismic survey using the reflection method were used as the methods for the geophysical survey. The rock slope subjected to the survey is located in a gorge along the Yoshino river in Yamashiro Town, Tokushima Prefecture. The slope has a width of 25 m and a height of 30 m. Its overhang in a nose form may has a possibility of causing collapse due to sliding. Cracks developed by horizontal schistosity were detected by performing geophysical logging on VSP, calipers, natural gamma-ray spectra, temperature and borehole in a borehole drilled vertically from the top of the slope. The seismic survey using the reflection method detected the cracks by emphasizing joints in the perpendicular direction. A possibility was shown to visualize the crack distribution with high resolution by using the above geophysical survey on the rock slope. In order to detect the crack distribution with still higher resolution, development into a three-dimensional exploration in the future is desired, not to speak of improvement in signal receivers, and discussions on geometry. 1 ref., 6 figs.

  11. Application of vector CSAMT for the imaging of an active fault; CSAMT ho ni yoru danso no imaging

    Energy Technology Data Exchange (ETDEWEB)

    Kobayashi, T; Fukuoka, K [Oyo Corp., Tokyo (Japan)

    1997-05-27

    With an objective to identify three-dimensionally resistivity in deep fault in the Mizunawa fault in Fukuoka Prefecture, a measurement was carried out by using the CSAMT method. The measurement was conducted by arranging seven traverse lines, each line having observation points installed at intervals of about 500 m. Among the 68 observation points in total, 33 points performed the vector measurement, and the remaining points the scaler measurement. For observation points having performed the vector measurement, polarized wave eclipses were depicted in the electric field to discuss which direction the current will prevail in. For analyses, a one-dimensional analysis was performed by using an inversion with smoothing restriction, and a two-dimensional analysis was conducted by using the finite element method based on the result of the former analysis. The vector measurement revealed that the structure in the vicinity of a fault was estimated to have become complex, and the two-dimensional analysis discovered that the Mizunawa fault is located on a relatively clear resistivity boundary. In addition, it was made clear that the high resistivity band may even be divided into two regions of about 200 ohm-m and about 1000 ohm-m. 2 refs., 7 figs.

  12. Detection of multiple AE signal by triaxial hodogram analysis; Sanjiku hodogram ho ni yoru taju acoustic emission no kenshutsu

    Energy Technology Data Exchange (ETDEWEB)

    Nagano, K; Yamashita, T [Muroran Institute of Technology, Hokkaido (Japan)

    1997-05-27

    In order to evaluate dynamic behavior of underground cracks, analysis and detection were attempted on multiple acoustic emission (AE) events. The multiple AE is a phenomenon in which multiple AE signals generated by underground cracks developed in an extremely short time interval are superimposed, and observed as one AE event. The multiple AE signal consists of two AE signals, whereas the second P-wave is supposed to have been inputted before the first S-wave is inputted. The first P-wave is inputted first, where linear three-dimensional particle movements are observed, but the movements are made random due to scattering and sensor characteristics. When the second P-wave is inputted, the linear particle movements are observed again, but are superimposed with the existing input signals and become multiple AE, which creates poor S/N ratio. The multiple AE detection determines it a multiple AE event when three conditions are met, i. e. a condition of equivalent time interval of a maximum value in a scalogram analysis, a condition of P-wave vibrating direction, and a condition of the linear particle movement. Seventy AE signals observed in the Kakkonda geothermal field were analyzed and AE signals that satisfy the multiple AE were detected. However, further development is required on an analysis method with high resolution for the time. 4 refs., 4 figs.

  13. Design and model experiments on thruster assisted mooring system; Futaishiki kaiyo kozobutsu no thruster ni yoru choshuki doyo seigyo

    Energy Technology Data Exchange (ETDEWEB)

    Nakamura, M.; Koterayama, W. [Kyushu Univ., Fukuoka (Japan). Research Inst. for Applied Mechanics; Kajiwara, H. [Kyushu Institute of Technology, Kitakyushu (Japan). Faculty of Computer Science and System Engineering; Hyakudome, T. [Kyushu University, Fukuoka (Japan)

    1996-12-31

    Described herein are dynamics and model experiments of the system in which positioning of a floating marine structure by mooring is combined with thruster-controlled positioning. Coefficients of dynamic forces acting on a floating structure model are determined experimentally and by the three-dimensional singularity distribution method, and the controller is designed by the PID, LQI and H{infinity} control theories. A model having a scale ratio of 1/100 was used for the experiments, where 2 thrusters were arranged in a diagonal line, one on the X-axis. It is found that the LQI and H{infinity} controllers of the thruster can control long-cycle rolling of the floating structure. They allow thruster control which is insensitive to wave cycle motion, and efficiently reduce positioning energy. The H{infinity} control regulates frequency characteristics of a closed loop more finely than the LQI control, and exhibits better controllability. 25 refs., 25 figs.

  14. Distributed scheduling for autonomous vehicles by reinforcement learning; Kyoka gakushu ni yoru mujin hansosha no bunsangata scheduling

    Energy Technology Data Exchange (ETDEWEB)

    Unoki, T.; Suetake, N. [Oki Electric Industry Co. Ltd., Tokyo (Japan)

    1997-08-20

    In this paper, we propose an autonomous vehicle scheduling schema in large physical distribution terminals publicly used as the next generation wide area physical distribution bases. This schema uses Learning Automaton for vehicles scheduling based on Contract Net Protocol, in order to obtain useful emergent behaviors of agents in the system based on the local decision-making of each agent. The state of the automaton is updated at each instant on the basis of new information that includes the arrival estimation time of vehicles. Each agent estimates the arrival time of vehicles by using Bayesian learning process. Using traffic simulation, we evaluate the schema in various simulated environments. The result shows the advantage of the schema over when each agent provides the same criteria from the top down, and each agent voluntarily generates criteria via interactions with the environment, playing an individual role in tie system. 22 refs., 5 figs., 2 tabs.

  15. Function analysis of working integrated circuit with scanning laser microscope. Laser kenbikyo ni yoru IC no dosa kansatsu

    Energy Technology Data Exchange (ETDEWEB)

    Ode, T. (Lasertec Corp., Kanagawa (Japan))

    1992-10-20

    By scanning a laser light, the reaction of a specimen against the light is detected in some means. The optical effect can be visualized by displaying that on the CRT or the like in synchronism with the scanning. Among these, an image formed and visualized by internal photoelectric effect by light is called OBIC image, and chiefly used for evaluating and analyzing semiconductor devices. Observing this OBIC image by a high speed scanning laser microscope has been spotlighted these days as an effective means for observing the state of p-n junction of an IC in operation. This paper descries the principle, the observing method, the detecting circuit, etc. of the semiconductor observing method using a laser microscope. Further, actual examples of detecting defects of an IC by means of OBIC image are shown. As for the problem, since leak parts are displayed as negative contrast in the OBIC image to affect finding work of leak part, the necessity of improvement is pointed out. 39 refs., 11 figs.

  16. Improvement of residual stress in stainless steel by cavitating jet; Cavitation funryu ni yoru stainless ko no zanryu oryoku kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Soyama, H.; Saka, M. [Tohoku Univ., Sendai (Japan)] Park, J. [Kyung Nam Junior College, Pusan (Korea, Republic of). Dept. Vehicle Eng.] Abe, H. [Tohoku Univ., Sendai (Japan)

    1998-08-15

    In order to strengthen materials, the improvement of residual stress in stainless steel by using a cavitating jet was investigated. In case of cavitating jet, the cavitation intensity can be controlled by hydraulic parameters such as upstream pressure and downstream pressure. In general, cavitation produces damage on hydraulic machinery. However, at the initial stage of cavitation erosion process, plastic deformation takes place on the material surface, then it is possible to do peening without damage considering the cavitation intensity and the exposure time. In order to evidence the suitable condition on the improvement of residual stress by the cavitating jet, the residual stress in SUS304 and SUS316 was examined. The three normal stresses in different directions were measured by X-ray diffraction method, then the principal stresses were calculated. Both principal stresses were changed from tension to compression within 10 seconds by the cavitating jet. The compressive stress resulted by the cavitating jet was saturated after a certain time. It was concluded that the cavitating jet improved the residual stress in stainless steel SUS316 as well as SUS304. 24 refs., 9 figs.

  17. Tidal energy conversion. Renewable energy; 3-3 choseki / choryu hatsuden. II. saisei kano energy ni yoru hatsuden

    Energy Technology Data Exchange (ETDEWEB)

    Makino, T. [Tobishima Corp., Tokyo (Japan)

    1998-10-15

    There are not much examples applying tidal energy conversion, but tide and tidal current phenomena can be forecasted so correctly regardless of weather that the applying tidal energy is to be expected in the future. The largest tidal power plant is at Reims in France and install 24 Kaplan turbines each of which outlet power is 10,000kW (rotational direction is reversible) on the breakwater (750m is length). Tidal range at this place being 8.5m on an average, during the period of flowing seawater into the reservoir and on the contrary during the period of discharging seawater to the sea generation is both performed. Though there is no actual result of tidal power plant in Japan, in tidal current power system experimental generators have been installed at Kurushima channel and Naruto channel. Nihon University carried out various kinds of experiment using a Darius turbine (1.6m in dia.) at Kurushima channel and got outlet power of 3kW at the maximum (1983-`88). There are few coasts which have sufficient tide range in Japan, but there are so good many applicable coasts in China and Southeast Asia that the tidal power generation is to be expectatively. 12 refs., 5 figs., 1 tab.

  18. Smoke reduction using multiple stage diesel combustion; Nidan nensho ni yoru diesel kikan no smoke teigen koka

    Energy Technology Data Exchange (ETDEWEB)

    Tsujimura, K. [Chiba Institute of Technology, Chiba (Japan); Hashizume, T.; Miyamoto, T.; Akagawa, H.

    1999-09-25

    A new diesel combustion concept termed MULDIC (MULtiple stage Diesel Combustion), which can reduce NO{sub x} emissions at high load conditions, was studied by means of engine test, combustion observation and numerical simulation. The engine test showed that simultaneous reduction of NO{sub x} and smoke could be obtained with MULDIC operation. In-cylinder combustion observation was carried out in order to clarify the cause of the smoke reduction of the MULDIC. In these photographs, a first stage combustion sins observed with nonluminous flame. In a second stage combustion, a highly sooting luminous flame was observed because the ignition delay was short. However this luminous flame disappeared quickly. Computational results showed that, oxygen is distributed evenly in the cylinder in later portion of the second stage combustion. Moreover, since cylinder temperature was very high, most of the soot oxidized rapidly. Thus, low smoke combustion was obtained. (author)

  19. Developing chiral technologies. Optical division by liquid chromatography; Hattensuru kiraru technology. Ekitai chromatography ni yoru kogaku bunkatsu

    Energy Technology Data Exchange (ETDEWEB)

    Onishi, a. [Daicel Chemical Industries, Ltd., Osaka (Japan)

    1998-05-01

    Optical division using chiral fixing phase for polysaccharide derivative based HPLC has been exhibiting superior capability as an analysis means. It now has transcended the framework of analysis as a result of the encounter with the SMB process, and is completing itself as an optically active body manufacturing means. This paper introduces the following examples of applying the chiral fixing phase for HPLC using polysaccharide derivatives as an unconformity identifier to the unconformity identifying mechanism and mass synthesis: 1) aromatic groups and carbamate groups as substitution groups are arranged regularly along a polysaccharide main chain having a regular and unconformable stereostructure, and a certain `unconformity identification field` is formed: 2) hydrogen bonding and dipole-to-dipole interactions take place between solutes in the ester groups and carbamate groups, and such an interaction act as stacking of aromatic rings among those having aromatic rings; and as a result, interactions in 2) occur in the `unconformity identification field` in 1), where the unconformity identification is executed. This paper describes the pseudo migration bed (SMB) process developed by UOP Corporation as a method for mass-synthesizing fillers for the polysaccharide derivative based HPLC. 6 refs., 3 figs.

  20. 6kW class laser cutting equipment; 6kW daishutsuryoku laser setsudanki ni yoru atsuita setsudan

    Energy Technology Data Exchange (ETDEWEB)

    Nagata, Y.; Nagahori, M. [Tanaka Engineering Works Ltd., Saitama (Japan)

    1994-11-01

    Application of the laser cutting machine to the area of cutting steel plates of 5 mm thick or more was first enabled in 1990 by the 2 kW oscillator that was introduced in that year. The thick plate cutting industry has a short history. This paper describes the features and performance of the 6 kW laser cutting machine that was announced in April, 1994. The machine uses a newly developed high-speed axial flow type carbon dioxide laser oscillater with the rated output of 6 kW. As the discharge excitation method, the machine adopted the RF (radio frequency) method that causes low contamination in the discharge tube. The 6 kW laser cutting machine has a number of features such as a large cutting area provided by the oscillator contained in the cutting machine, cutting quality stabilized by the optical path length fixing unit, and automatic functions such as automatic setting of the cutting conditions and scheduled operation. The machine can cut mild steel plates of up to 40 mm thick (or up to 16 mm for stainless steel plates) at the cutting speed of 1600 mm/min for a 16 mm thick plate and 2200 mm/min for a 12 mm thick plate, with the good cut sectional surface. 5 figs., 1 tab.

  1. Biological wastewater treatment technology with application of multihole glasses. Takoshitsu glass wo riyoshita biseibutsu ni yoru haisui shoriho no kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Honda, S; Murayama, Y; Tanaka, H; Yazawa, T; Eguchi, K [Government Industrial Research Institute, Osaka (Japan)

    1991-11-25

    This paper describes efficiency improvement in wastewater treatment to separate SS component using anaerobic fermentation with fixable microorganisms and multihole glass separation films. Measurement of microorganism deposition on microporous PVF resin in a fermentation tank revealed that hydrophilic resins with smooth surface have better deposition, and the suitable carrier hole diameters were from 300[mu]m to 500[mu]m. Adding slightly-soluble carbonate when bacteria are fixed collectively is effective in preserving the entire methane fermentation reaction system and stabilizing the carriers. A composite film comprising SiO2-ZrO2-based porous glass made by using a sol-gel process and porous ceramics had the maximum desalination rate reaching 90%. The permeation rate at a film thickness of 2[mu]m was 46 times as much of that for 500-[mu]m single-layer porous glass. As a result of reforming the pore surface by introducing -Si(CH3)3, the film has turned affinitive to non-polar solvent, repelling water to permeate. In an experiment for fermentation liquid permeation of separation film composite bioreactor using digestive sludge, the higher the SS particle concentration, the more the initial clogging was difficult to occur. The film permeating flow velocity showed a maximum value at hole diameters of about 0.2[mu]m. 3 refs., 6 figs., 2 tabs.

  2. Detection of buried pipes by polarimetric borehole radar; Polarimetric borehole radar ni yoru maisetsukan no kenshutsu jikken

    Energy Technology Data Exchange (ETDEWEB)

    Sato, M.; Niitsuma, H. [Tohoku University, Sendai (Japan); Nakauchi, T. [Osaka Gas Co. Ltd., Osaka (Japan)

    1997-05-27

    If the borehole radar is utilized for detection of buried pipes, the underground radar measurement becomes possible even in the situation where the mesurement on the earth surface is difficult, for example, such a place as under the road where there is much traffic. However, since buried pipes are horizontally installed and the existing borehole radar can send/receive only vertical polarization, the measurement conducted comes to be poor in efficiency from a viewpoint of the polarization utilization. Therefore, by introducing the polarimetric borehole radar to the detection of buried pipes, a basic experiment was conducted for the effective detection of horizontal buried pipes. Proposing the use of a slot antenna which can send/receive horizontal polarization in borehole in addition to a dipole antenna which sends/receives vertical polarization, developed was a step frequency type continuous wave radar of a network analyzer basis. As a result of the experiment, it was confirmed that reflection from buried pipes is largely dependent on polarization. Especially, it was found that in the slot dipole cross polarization mesurement, reflection from buried pipes can be emphasized. 4 refs., 5 figs.

  3. Free convective heat loss from cavity-type solar furnace; Solar receiver kara no shizen tairyu ni yoru netsusonshitsu

    Energy Technology Data Exchange (ETDEWEB)

    Fujii, I; Ito, N [Meiji University, Tokyo (Japan)

    1996-10-27

    Free convective heat loss from solar heat receivers was studied, using three laboratory model receivers (different in depth L and aperture diameter d) heated by electric heaters. Most of the heat produced by heaters was transmitted to the air inside. The cylindrical vessel walls were fully insulated against heat. Heat loss being supposed to result mainly from transfer by free convection, the experiment results were edited by use of Nusselt number Nu and Rayley number Ra. Relations between Nu(D/d){sup m1} and Ra(L/D){sup m2} were plotted in a chart. Here, D is the receiver inner diameter, and m1 and m2 are constants that can be determined by computation. Tests points were provided approximately lineally, irrespective of D, L, or receiver inclination. Air currents were found to produce one or more swirls inside, thanks to the current visualization technique, when the receiver inclination was not sharper than 120{degree} (except 0{degree}). The number of swirls increased as the inner wall temperature rose. This kind of behavior of air currents directly affects the degree of heat loss. 9 refs., 4 figs.

  4. Study of removing a peat-layer from surface active agents; Deitanso ni yoru kaimen kasseizai no jokyo

    Energy Technology Data Exchange (ETDEWEB)

    Umemiya, H; Kitamura, K [Yamagata University, Yamagata (Japan)

    1996-10-27

    An experiment was performed on a system for recycling water resources by using a peat-layer. A laboratory device was also made in order to examine the effects of a peat-layer on surface active agents. In the experiment, a water examination was carried out in which a mixture of water and kitchen detergent at the rate of 15,000 to 1 was filtered through a peat-layer of 2-3cm thick, as was a mixture of water, kitchen detergent and oil at the rate of 15,000 to 1 to 2. In the water examination, various measurements were done such as the measurement of COD by potassium permanganate acid process, measurement of pH by a pH meter with glass electrodes and measurement of coefficient of permeability by a variable water level permeability test. As a result of the experiment, it was revealed that a peat-layer had ability to remove surface active agents, that injection water tended to increase acidity in a peat-layer and that a peat-layer had ability to remove foaming of surface active agents. The COD of domestic waste water decreased from 12mg/l to 0.16mg/l in the system for recycling water resources using a peat-layer. 3 refs., 10 figs., 1 tab.

  5. Cooling effects of artificial water facilities by using a moving type turbulence promoter; Kudo ranryu sokushintai ni yoru suireikyaku jikkenho

    Energy Technology Data Exchange (ETDEWEB)

    Miyake, K; Nomura, T; Nishimura, N; Iyota, H [Osaka City University, Osaka (Japan)

    1996-10-27

    Artificial water facilities present an effective means to alleviate trying micrometeorological phenomena such as warming of the urban space. For the reproduction of such an alleviating means by use of a model in a wind tunnel, a moving disturbance promoter (moving spire) was developed so as to render disturbances in a wind tunnel current similar in scale to ones in the real atmosphere, and an air current cooling experiment was conducted using a model fountain. The effort was intended for a small-size wind tunnel without a space large enough for disturbance promoter installation, and a moving type spire was developed for promoting disturbance effectively. The new spire is driven by a driving unit consisting of a motor and cam and can change its angle relative to the main current by 140{degree} at a rotation cycle of 1.7Hz., and this changes the flow direction of the main current periodically. As compared with the generally used combination of a roughness block and stationery spire, this new spire produced a disturbance intensity two times greater and a disturbance scale three times larger. When the disturbance intensity and scale were increased, the cooling characteristics of the air current changed in response to changes in the state of flow. 8 refs., 7 figs., 1 tab.

  6. Shift operation control of automatic transmission by {mu}-synthesis; {mu} synthesis ni yoru jido hensokuki no hensoku seigyo

    Energy Technology Data Exchange (ETDEWEB)

    Nagaoka, M; Nishiyama, Y; Nakayama, Y; Kamada, S [Mazda Motor Corp., Hiroshima (Japan)

    1997-10-01

    We have developed a control technology, which the robust control theory is applied, to improve a shift quality of automatic transmission for a passenger car. When applying the robust control theory to the transmission control, many issue arise such as difficulty in system identification and/or the capability of ECU for computing. Recently, We have obtained an exact performance that allows the transmission to be robust controlled with an onboard ECU by improving the system identification process and reducing the model dimensions after the controller design finalized. 6 refs., 7 figs.

  7. Microfiltration of soy sauce sediment with rotating disk membrane module; Kaitengata enbanmaku module ni yoru shoyuori no roka

    Energy Technology Data Exchange (ETDEWEB)

    Matsushita, K.; Kanekuni, N.; Nogaki, H.; Itakura, I.; Shimizu, Y.; Watanabe, A. [TOTO Ltd., Kitakyushu (Japan)

    1995-01-15

    Soy sauce sediment is formed in pasteurization of raw soy sauce. It is treated as industrial waste, though its main component is soy sauce, because of difficulty in perfect clarification of the suspension. In this paper, we decided a suitable range of pore size of microfiltration and a cut-off level of ultrafiltration to clarify soy sauce sediment and we developed a rotating disk membrane module (RD Module) and compared performance with conventional a multi-tubular membrane module (MT Module). The optimum range to obtain soy sauce of quality was less than a pore size of O.2{mu}m for microfiltration, while ultrafiltration was not suitable for soy sauce sediment. Ultrafiltration was restricted by rejection of colors and nucleic acids and related compounds in soy sauce sediment, rather than rejection of bacteria and ethanol. An RD Module could recover soy sauce of quality and was superior to an MT Module for concentration ratio, but the permeate fluxes of the RD Module decreased under conditions of high revolution as centrifugal forces were exerted on the permeate in the disk membrane. The power consumption of the RD Module was proportional to the cube of number of revolutions and to the fifth power of the radius, so it was found that one of methods for the scale up is to increase the number of disk membranes than increase the radius. 15 refs., 8 figs., 1 tab.

  8. Improved practical formulas for estimation of cable tension by vibration method; Shindoho ni yoru cable choryoku jitsuyo santeishiki no hosei

    Energy Technology Data Exchange (ETDEWEB)

    Zui, H. [Setsunan University, Osaka (Japan). Faculty of Engineering; Shinke, T. [Kobe Technical College, Kobe, Kobe (Japan); Hamazaki, Y. [Kobe Steel, Ltd., Kobe (Japan)

    1995-10-21

    The vibration method is usually utilized on the measurement of cable tension during construction of cable bridge such as Nielsen bridges or cable stayed bridges. Practical formula for the vibration method previously proposed by authors is often used where bending rigidity is taken into account. These formula, however, have a certain limit of application and do not yield good results when the cable is not slender or not enough mentioned. The practical formula is modified to improve the accuracy and new formulas are made. The new practical formulas are applicable to any cables, regardless of its length and tension in it. The accuracy is confirmed through comparison of the value obtained by practical formulas with measured values and calculated value by F.E.M. 2 refs., 4 figs., 1 tab.

  9. Large-diameter boring of rock bed by a reveres circulation drill; Ribasu sakyureshon doriru ni yoru daikokei ganban sakko

    Energy Technology Data Exchange (ETDEWEB)

    Sakae, S.; Torii, K. [Kajima Corp., Tokyo (Japan); Hoshino, S.; Motoyama, M.

    1995-09-25

    The Itojima Large Bridge is a road bridge of 675 m in the total length connecting together the Nagashima Island and the Itojima Island in the northwest district of Kagoshima Prefecture, having a central span of 260 m and comprising a 5-span-continuous PC cable stayed bridges and PC box girder bridges. The foundation of this bridge employs a multi-pillar type pile structure. The piling work was started in July, 1991 by a hole inset method in a severe working environment where the depth of water is 20 m, the range of the tides is 4 m, the speed of tidal current is 2 kt, the rock bed structure is complicated and the steep seabed is steeply inclined. This report describes the results of the execution of the reverse circulation drilling, which has a high general versatility in rock bed boring, using self-lifting barges and large working boats during the rock bed boring for the foundation piling for the construction of the Itojima Large Bridge. The report, especially, also introduces the details of the work that casing pipes were driven into a stable rock bed by a vibrojet method for the measure against the collapse of a bore wall which occurred during the boring work. 24 figs., 14 tabs.

  10. Leveling of battery load and extension of battery life by serial connection of electric double layer capacitors with batteries for electric vehicles. Experimental results on the small model; Denki jidoshayo denchi to denki nijuso capacitor no chokuretsu setsuzoku ni yoru denchi futan no heijunka oyobi denchijumyo no enshinka. (kogata model ni yoru jikken seika). Kogata model ni yoru jikken seika

    Energy Technology Data Exchange (ETDEWEB)

    Takehara, J.; Okubo, N.; Miyaoka, K. [Chugoku Electric Power Co. Inc., Hiroshima (Japan)

    1996-10-25

    The load leveling method of batteries for electric vehicles was studied for extension of a battery life and mileage every charging. Under large load fluctuation conditions such as deceleration and acceleration, use of electric power sources other than battery for peek load at acceleration can improve a battery life, output power capacity and mileage every charging. Combination of effective recovery of regenerative power at deceleration with its discharge at acceleration is one of the effective methods. The electric double layer capacitors are serially connected with the batteries, regenerative power is charged only into the capacitors, and both voltages of the battery and capacitor are applied to a power circuit. Battery load is reduced by load on the capacitor. Until the capacitor is re-charged by regenerative power after full discharge, power is supplied only by battery through a diode. Capacitor power is used as effectively as possible until approaching considerably low voltage. As peak load of the battery is reduced by 30%, the mileage increases by 5.7%, and the battery cycle life becomes 1.5 times longer. 7 refs., 5 figs., 3 tabs.

  11. Research report of fiscal 1997. Basic research on the commercialization of innovative energy technologies; 1997 nendo chosa hokokusho. Kakushinteki energy gijutsu no jitsuyoka ni kansuru kiso chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    This paper summarizes the research result in fiscal 1997 from the basic research results on the commercialization of innovative energy technologies. The target of a photovoltaic power generation market includes isolated power sources (several kWp) for distant places or developing countries, and those (several tens kWp) for personal residences or public facilities. Although the former is mainly promoted in the West, while the latter over the world, their profitability is unsolved. Power plants over several hundreds kWp are in demonstration test. Solar heat power generation of several tens to hundreds MWp is most profitable, however, small-scale one is poor in feasibility. Australia takes an interest in distributed photovoltaic power generation directly connected with actual lives of residents, and has a dominant opinion that desert is useless as large-scale site. This country lays emphasis on protection and maintenance rather than positive use of desert based on a basic cognition that desert is easily changed and broken. The Australian government announced power company`s obligation to use renewable energy by 2%, and a strong organization is scheduled to be newly established. 59 figs., 57 tabs.

  12. Fiscal 1992 report. Overseas surveys out of surveys for coal hydrogasification technology development; 1992 nendo sekitan suiten gaska gijutsu kaihatsu chosa ni okeru kaigai chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1992-12-01

    As part of the coal hydrogasification technology development survey project, overseas surveys were carried out as in the preceding fiscal year. With an emphasis placed on the process materials and resources, and on product utilization technologies, surveys and studies were conducted about the trends of development of coal and natural gas resources, and information was collected on energy-related matters in Indonesia and Australia. The need of hydrogasification technology was investigated from the viewpoint of natural resources. Moreover, Japanese engineers were dispatched to APEC (Asia-Pacific Economic Cooperation Conference) New Energy Seminar, Indonesia. Visits were made for information on the natural gas resources at an LNG base in East Kalimantan, Indonesia; coal gasification, energy, and others at CSIRO (Commonwealth Scientific and Industrial Research Organization), Australia; coal bed and methane resources at Warren Center, University of Sydney, Australia; coal bed and methane resources at the Brisbane office, Mitsubishi Gas Chemical Company, Inc.; and coal resources at coal mines of Idemitsu South Queensland Coal Pty Ltd. (NEDO)

  13. Fiscal 1998 research report. Feasibility study on international cooperation for technology transfer; 1998 nendo chosa hokokusho. Gijutsu iten ni kakawaru kokusai kanosei chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    CTI (Climate Technology Initiative) is a framework for use by developed countries in international cooperation and voluntary promotion of the development and diffusion of technologies contributory to reduction of greenhouse gas emissions. The CTI's activity goal is to accelerate the transfer and diffusion of technologies for climate change control. As the first step toward personnel development programs relating to energy efficiency, CTI organized its workshop on that theme. The results of the workshop have been examined, and its achievements were reported at COP4 meeting, while responses by participatory countries were studied to evaluate the potential of international cooperation with regard to personnel development for reducing greenhouse gas emissions. In fiscal 1998, the CTI workshop 'Energy Efficiency' was held. The participants from developing countries understood the necessity and importance of energy saving enough through discussions in the workshop, and announced their message toward the world at COP4 meeting. (NEDO)

  14. Fiscal 1990 report. Overseas surveys out of surveys for coal hydrogasification technology development; 1990 nendo sekitan suiten gaska gijutsu kaihatsu chosa ni okeru kaigai chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1990-12-01

    For the selection and evaluation of coal gasification processes suitable for substitute natural gas (SNG) production, visits were made to overseas business corporations, research institutes, etc., engaged in the development of coal gasification technology, surveys were conducted of the status of development abroad, and information was collected. Visited were Westfield Development Center, British Gas plc; Midlands Research Station, British Gas plc; IEA Coal Research; IFP (Institut Francais de Petrole); and DMT-FP (DMT-Gesellschaft fur Forschung und Prufung mbH). The Westfield Development Center uses coal from near-by open cut mines and supplies town gas to the Scottish region. The slagging Lurgi process, etc., were investigated. At Midlands Research Station, where a coal hydrogasification process is under development, the history of development and the cold model test were summarized, a test plan using a 5 tons/day pilot plant and the modification of test facilities were explained, and the 5 tons/day pilot plant was visited for study. (NEDO)

  15. Fiscal 1998 research report. Research on energy conversion technology using biomass resources; 1998 nendo chosa hokokusho. Biomass shigen wo genryo to suru energy henkan gijutsu ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    Feasibility study was made on construction of the new energy production system by thermochemical conversion or combination of thermochemical and biological conversions of agricultural, fishery and organic waste system biomass resources. This report first outlines types and characteristics of biomass over the world, proposes the classification method of biomass from the viewpoint of biomass energy use, and shows the introduction scenario of biomass energy. The energy potential is calculated of agricultural waste, forestry waste and animal waste as the most promising biomass energy resources, and the biomass energy potential of energy plantation is estimated. The present and future of biochemical energy conversion technologies are viewed. The present and future of thermochemical energy conversion technologies are also viewed. Through evaluation of every conversion technology, the difference in feature between each conversion technology was clarified, and the major issues for further R and D were showed. (NEDO)

  16. Fiscal 1998 research report. Feasibility survey on offshore wind power generation in Japan; 1998 nendo chosa hokokusho. Nippon ni okeru yojo furyoku hatsuden no donyu kanosei chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    This survey studied the feasibility of large-scale offshore wind power generation in Japan. Attempt was also made on preparation of outline maps of offshore wind around Japan. The cost of future offshore wind power generation systems is roughly dependent on technical issues and environmental issues. As technical issues, 'installation site,' 'foundation,' 'system interconnection' and 'maintenance/management' were summarized based on applications in Europe. As a result, it was clarified that technical issues can be solved with existing technologies to a certain extent, however, those relate to economical problems closely. The previous environment impact assessments say that wind power generation has no problems on the environmental issues. As relatively strong wind coastal areas, the outline maps of offshore wind point out Western Hokkaido area, Japan Sea area of Tohoku district, Pacific ocean area of the central part of Honshu, Genkai Nada area, Western Kyushu area and Southwest islands area, and suggest that these areas are promising for offshore wind power generation. (NEDO)

  17. Fiscal 1991 report. Overseas surveys out of surveys for coal hydrogasification technology development; 1991 nendo sekitan suiten gaska gijutsu kaihatsu chosa ni okeru kaigai chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1991-11-01

    For the selection and evaluation of coal gasification processes suitable for substitute natural gas (SNG) production, visits were made to business corporations, research institutes, etc., engaged in the development of coal gasification technology abroad, and surveys were conducted of the development status overseas and information was collected. Visits were made and information was collected on the Lurgi process, a commercial SNG plant, and others at Dakota Gasification Company, U.S.; U-gas process and others at Institute of Gas Technology; energy-related matters at U.S. Department of Energy; coal hydrogasification process and others at Midlands Station, British Gas plc; Shell coal gasification process and others at Amsterdam Research Institute, Royal Dutch Shell; coal gasification, high-temperature desulfurization, and others at KEMA, Holland; and IGCC (integrated gasification combined cycle) verification plant with the Shell coal gasification process incorporated thereinto, now under construction at Demkolec. (NEDO)

  18. Fiscal 2000 survey report. Survey and study of constellation satellites technology; 2000 nendo chosa hokokusho. Konsutereshon eisei gijutsu ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    Demands for constellation satellites were surveyed and satellite systems were studied for extracting basic technical tasks relative to constellation satellite systems and for drafting space verification plans. For a constellation satellite system to accomplish its missions, two or more satellites have to be simultaneously navigated. It is assumed that its field of application will cover earth observation, information communication, risk management, disaster prevention, and the like. With such applications taken into consideration, surveys and studies were conducted about the need and marketability of constellation satellites, need of state-level involvement, and requests for missions to be imposed on a constellation system. For plural satellites to satisfy mission requests by coordinating with each other, it will be necessary to develop basic technologies, such as navigational guidance, communications control, system autonomous management, and operation on the ground. Functions and performance that a constellation satellite system are requested to have and basic technologies to be studied and developed were extracted, and space verification plans were drafted. (NEDO)

  19. Fiscal 1998 research report. Feasibility study on international cooperation for technology transfer; 1998 nendo chosa hokokusho. Gijutsu iten ni kakawaru kokusai kanosei chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    CTI (Climate Technology Initiative) is a framework for use by developed countries in international cooperation and voluntary promotion of the development and diffusion of technologies contributory to reduction of greenhouse gas emissions. The CTI's activity goal is to accelerate the transfer and diffusion of technologies for climate change control. As the first step toward personnel development programs relating to energy efficiency, CTI organized its workshop on that theme. The results of the workshop have been examined, and its achievements were reported at COP4 meeting, while responses by participatory countries were studied to evaluate the potential of international cooperation with regard to personnel development for reducing greenhouse gas emissions. In fiscal 1998, the CTI workshop 'Energy Efficiency' was held. The participants from developing countries understood the necessity and importance of energy saving enough through discussions in the workshop, and announced their message toward the world at COP4 meeting. (NEDO)

  20. Report on survey of promotion of activities implemented jointly in China in FY 1997; 1997 nendo chosa hokokusho (Chugoku ni okeru kyodo jisshi katsudo no suishin chosa)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    Rapid economy growth has been observed in Asia including Japan. On the other hand, problems of population and environment grew even worse with the economic growth. Especially, China is the second CO2 emission country in the world. Large energy demand is still forecasted with its economic growth in the future. It is well-known that the energy consumption per unit GDP is very large. Therefore, it is very significant to promote the activities implemented jointly with China for mitigating the emission of greenhouse gases including CO2, which provides a significant meaning for solving global environmental issues as well as for improving regional environmental issues. It is necessary for the above to recognize the appropriate current situations and to promote the activities implemented jointly suitable for the country. Based on the discussions and information exchanges about environmental issues with staffs concerning environmental policies and scientists as well as the field surveys, methods for the activities implemented jointly were investigated to provide some proposals. 4 figs., 8 tabs.

  1. FY 2000 report on the survey of energy conservation technology in Japan; 2000 nendo chosa hokoku. Nihon kokunai no sho energy gijutsu ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    For the purpose of supporting self-help efforts to deal with energy environmental problems in developing countries in the Asian region, etc. and making the transfer of the energy conservation technology and petroleum substituting energy technology that are at a practical stage and are owned by Japan, evaluation of each technology was conducted in terms mainly of applicability for a model project. The existing survey data were supplemented/deleted. As the model project supposing the application to developing countries in Asia, types of industry for survey were selected as follows: iron/steel, nonferrous metal, chemical industry, oil refining, ceramics/earthware, paper/pulp, foodstuffs, textile/spinning, electricity (power generation)/gas, technologies common to all industry types. Technologies for survey were energy saving production facilities and energy saving equipment at plant with a regular scale to which the applicability as the model project was supposed. The energy saving effect was all calculated in TOE, and the method to calculate the effect was also described. The paper further described possibilities of introduction/spread of the said technologies to developing countries in Asia, introduction limitation/preconditions, cost vs. effect, etc. (NEDO)

  2. Fiscal 1997 survey report. Survey on the innovative well drilling technology; 1997 nendo chosa hokokusho. Kakushinteki kosei kussaku gijutsu ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    In the geothermal drilling, reduction of the cost of well drilling is an important subject for technical development. The geothermal resource development tends to be made at higher temperatures and at deeper wells. In the present drilling technology, the cost is rising with the exponentially increasing depth and temperature, and there is also occurring the technical limit. Accordingly, the survey clarified the limit of the present drilling technology/cost to point out the research trend of the drilling technology as substitute for the present one, possibilities of the introduction, and the R and D target and subjects. As to latest drilling systems abroad and in Japan, the following were surveyed to study and extract promising technologies and systems: improvement/application of drilling equipment/materials (enhancement of heat resistance of the main drilling equipment, etc., cooling effects of top drive, heat resistance verification of MWD tools, PDM, tricone bits, multi-stage cementing tools, etc.), heightening of drilling rates, trend surveys of slim hole drilling, control drilling, well maintenance/workover, and well design technology. 68 refs., 73 figs., 40 tabs.

  3. Fiscal 1998 research report. Feasibility survey on offshore wind power generation in Japan; 1998 nendo chosa hokokusho. Nippon ni okeru yojo furyoku hatsuden no donyu kanosei chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    This survey studied the feasibility of large-scale offshore wind power generation in Japan. Attempt was also made on preparation of outline maps of offshore wind around Japan. The cost of future offshore wind power generation systems is roughly dependent on technical issues and environmental issues. As technical issues, 'installation site,' 'foundation,' 'system interconnection' and 'maintenance/management' were summarized based on applications in Europe. As a result, it was clarified that technical issues can be solved with existing technologies to a certain extent, however, those relate to economical problems closely. The previous environment impact assessments say that wind power generation has no problems on the environmental issues. As relatively strong wind coastal areas, the outline maps of offshore wind point out Western Hokkaido area, Japan Sea area of Tohoku district, Pacific ocean area of the central part of Honshu, Genkai Nada area, Western Kyushu area and Southwest islands area, and suggest that these areas are promising for offshore wind power generation. (NEDO)

  4. FY 1998 survey report. Examinational research on the construction of body function database; 1998 nendo chosa hokokusho. Shintai kino database no kochiku ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    The body function database is aimed at supplying and supporting products and environment friendly to aged people by supplying the data on body function of aged people in case of planning, designing and production when companies supply the products and environment. As a method for survey, group measuring was made for measurement of visual characteristics. For the measurement of action characteristics, the moving action including posture change was studied, the experimental plan was carried out, and items of group measurement and measuring methods were finally proposed. The database structure was made public at the end of this fiscal year, through the pre-publication/evaluation after the trial evaluation conducted using pilot database. In the study of the measurement of action characteristics, the verification test was conducted for a small-size group. By this, the measurement of action characteristics was finally proposed. In the body function database system, subjects on operation were extracted/bettered by trially evaluating pilot database, and also adjustment of right relations toward publication and preparation of management methods were made. An evaluation version was made supposing its publication. (NEDO)

  5. Evaluation for characteristics of around the Nojima fault; Butsuri tansa ni yoru `Nojima jishin danso` shuhen no jiban bussei ni kansuru ichihyoka

    Energy Technology Data Exchange (ETDEWEB)

    Shimizu, K; Tsuji, T [Newjec Inc., Osaka (Japan); Tsuji, M [OYO Corp., Tokyo (Japan)

    1996-05-01

    Various surveys were conducted for the area around the Nojima fault, including ground surface, two-dimensional electrical and boring surveys and elastic wave tomography, in order to grasp properties of the ground around the `Nojima earthquake fault.` The resistivity image method as one of the two-dimensional electrical methods was used to grasp fault shapes over a wide range of the 1.6km long section extending between Esaki and Hirabayashi. The courses of traverse were set in the direction almost perpendicular to the fault. Boreholes were excavated and elastic wave tomography was conducted between the boreholes on the 9th and 17th courses of traverse, to confirm ground/mountain conditions and to compare the results with observed elastic wave velocities. Very low resistivities are observed at places where granite is distributed, suggesting that the fault-induced changes are not limited to the area around the fault. The zone in which elastic wave velocity decreases is narrow, 10m at the longest, at a velocity of 2.4km/s or lower, which is a low velocity for that propagating in granite. 5 refs., 4 figs.

  6. Interpretation of seismic section by acoustic modeling. Study of large amplitude events; Hadoba modeling ni yoru jishin tansa danmen no kaishaku. Kyoshinhaba event ni taisuru kosatsu

    Energy Technology Data Exchange (ETDEWEB)

    Tamagawa, T; Matsuoka, T; Sato, T [Japan Petroleum Exploration Corp., Tokyo (Japan); Minegishi, M; Tsuru, T [Japan National Oil Corp., Tokyo (Japan)

    1996-05-01

    A large amplitude event difficult to interpret was discovered in the overlap section in offset data beyond 10km targeting at deep structures, and the event was examined. A wave field modeling was carried out by use of a simplified synclinal structure model because it had been estimated that the large amplitude event had something to do with a synclinal structure. A pseudospectral program was used for modeling the wave field on the assumption that the synclinal structure model would be an acoustic body and that the surface would contain free boundaries and multiple reflection. It was found as the result that a discontinuous large amplitude event is mapped out in the synclinal part of the overlap section when a far trace is applied beyond the structure during a CMP overlap process. This can be attributed to the concentration of energy produced by multiple reflection in the synclinal part and by the reflection waves beyond the critical angle. Accordingly, it is possible that phenomena similar to those encountered in the modeling process are emerging during actual observation. 2 refs., 8 figs.

  7. Interpretation SP anomaly caused by subsurface fluid flow; Chika ryudokei ni yoru shizen den`i anomaly no kaishaku ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Yasukawa, K [Geological Survey of Japan, Tsukuba (Japan); Mogi, T; Kawahira, M [Kyushu University, Fukuoka (Japan). Faculty of Engineering

    1996-05-01

    A PTSP simulator, developed by combining a fluid flow simulator and a simulator for computing the spontaneous potential (SP) out of flow velocity distribution, was used to investigate the impact of the distribution of terrain, permeability, and resistivity upon the ground surface SP. SP computation using simple models such as highlands or cliffs indicated that the terrain-caused SP anomaly was negatively dependent upon elevation. It was also indicated, however, that, in some types of resistivity distribution, the SP profile changes, the peak goes out of place, and even the apparent polarity may reverse in extreme cases. In the study of the SP profile for the Takeyu hot spa, Oita Prefecture, PTSP-aided modeling was carried out. It was then found that fluid flows caused by the terrain were not enough to explain the peak at the middle of the mountain, which suggested the existence of a fluid flow caused by temperature distribution. 11 refs., 5 figs.

  8. Model experiments on imaging subsurface fracture permeability by pulsed Doppler borehole televiewer; Pulse doppler borehole televiewer ni yoru kiretsu tosuisei hyoka ni kansuru model jikken

    Energy Technology Data Exchange (ETDEWEB)

    Inagaki, Y; Niitsuma, H [Tohoku University, Sendai (Japan). Faculty of Engineering

    1996-05-01

    This paper reports model experiments to evaluate flow rates of fluids passing through a fracture by using a Doppler borehole televiewer (DBHTV). A supersonic transducer disposed on a well axis transmits transmission pulses, and a transducer receives scattered waves generated by particulates in water and waves reflected on a well wall. This signal is applied with time gating to extract only the scattered waves from particulates in the vicinity of the well wall. Deriving spectra in the recorded Doppler signal obtains flow velocity components in the direction of the well radius. A model was made with a polyvinylchloride pipe with a diameter of 14.6 cm to simulate a well, to which an aluminum pipe with an inner diameter of 2 mm is connected to be used as a simulated fracture, and mud water is circulated in the pipe. The result of deriving a passed flow volume in this model by integrating flow rate distribution derived by using the above method to a predetermined range in the vicinity of the fracture showed a good proportional relationship with actual flow rate in the simulated fracture. 1 ref., 7 figs.

  9. Evaluation stationariness of triaxial seismic while drilling and detection of reflected wave; Kosei kussaku ni tomonau danseiha no sanjiku kaiseki ni yoru hiteijo hyoka to hanshaha no kenshutsu

    Energy Technology Data Exchange (ETDEWEB)

    Yoshida, T; Asanuma, H; Niitsuma, H [Tohoku University, Sendai (Japan). Faculty of Engineering

    1996-05-01

    This paper reports a method to detect reflected wave components contained in an elastic wave caused in association with well drilling. Measurement was made on an elastic wave caused in association with well drilling in an experimental field by using a triaxial elastic wave detector disposed in a measurement well. Analyzing the particle motion tracks in the derived elastic wave signals (to derive the main axial direction of a three-dimensional hologram) revealed that oscillation direction of the signals changes non-steadily by time centering around the S-wave oscillation direction. In addition, a sound source position was estimated during the drilling. Existence probability of the S-wave signal in the non-steady continuous signals was estimated by handling the particle motion tracks stochastically. In addition, this existence probability was used as a weighting function for a correlative analysis to detect a reflected wave from directly reaching wave components in the non-steady continuous signals. Thus, improvement in reliability of reflected wave detection was attempted. Effectiveness of this method was endorsed by the field data. 3 refs., 7 figs.

  10. Study on heavy duty truck stability control by braking force control; Seidoryoku seigyo ni yoru truck no sharyo kyodo anteika ni taisuru ichikosatsu

    Energy Technology Data Exchange (ETDEWEB)

    Matsuda, K; Shinjo, H; Harada, M; Ohata, K; Sakata, K [Mitsubishi Motors Corp., Tokyo (Japan)

    1997-10-01

    Now a days we are discussing about the vehicle stability control system which freely controls the braking force of each wheel to apply the yaw t and decelerate the vehicle. The system drastically improve the vehicle cornering performance and stabilize the vehicle behavior in its critical area. This paper discusses a point to notice in case of applying this technique for heavy duty trucks, and describes the possibility of the stabilization for vehicle cornering behavior about heavy duty truck. 3 refs., 10 figs., 2 tabs.

  11. Estimation of performance of a high-speed boat by using the Rankine source method; Kosokutei no rankinsosuho ni yoru seino suitei ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Eguchi, T [Mitsui Engineering and Shipbuilding Co. Ltd., Tokyo (Japan)

    1997-10-01

    This paper describes estimation of performance of a high-speed boat by using the Rankine source method. An orthogonal coordinate system is considered, which uses the center of a hull as the zero point, and is made dimensionless by using the hull length. The catamaran boat or the single hull boat being the subject of the discussion is supposed to have a transom stern, and to be sailing at a constant speed in the -X direction. A governing equation and a border condition were formulated using disturbance speed potential and X-direction speed differentiation. An inverse specular image was employed as a specular image system upon considering attitude change in the high-speed boat. As to the division of hull surface, the portions protruded above the static water surface were cut off from among the panel data of boat CAD. Considering a high speed condition in which the water surface is completely separated at the transom section, the water level at the transom section was supposed to be at the same height as at the rear end of the hull. Blow-out intensity at the water surface was derived in such a way that a CAD panel of the rear end of the hull is searched and wave height agrees with the height of the transom in the Z direction. A resistance curve may be obtained easily by using a personal computer. 4 refs., 8 figs.

  12. Formation of secondary products in water purification. ; Charactarization of chlorination by-products. Josui shori ni okeru fukuseiseibutsu. ; Enso shori ni yoru shodoku fukuseiseibutsu no seisei tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Aizawa, T [The Inst. of Public Health, Tokyo (Japan)

    1993-12-10

    Chlorination of drinking water is an inevitable process for the purification of drinking water. It has been made clear that injected free chlorine reacts with organic matter in water to produce chlorinated by-products. Many of those compounds are toxic, and studies have been made on the international water quality standard. Water quality standard has been revised also in Japan. The sources of organic matter which is the cause for production of chlorinated by-products vary according to the kinds and conditions of the water source for drinking water. Removal of precursors in the original water, removal of by-products, and change in the disinfection system with alternate disinfectant for chlorine are among the measures for decreasing chlorinated by-products at water purification plants, but the first one is employed as the basis method. It is expected that more severe regulation may be imposed on the quality of the water source for drinking water, and more strict oxidation and disinfection systems is inevitable for water management based on the new water quality standard. 10 refs., 5 figs., 2 tabs.

  13. Estimated method of permeability in the granitic rocks by geophysical loggings; Butsuri kenso shuho ni yoru kakoganchu no tosuisei ni kansuru ichikosatsu

    Energy Technology Data Exchange (ETDEWEB)

    Matsuoka, K; Hashimoto, N. [Geophysical Surveying and Consulting Co. Ltd., Tokyo (Japan)]Ogata, N. [Power Reactor and Nuclear Fuel Development Corp., Tokyo (Japan)

    1997-10-22

    Water permeability in granite is estimated by performing geophysical investigation using a 500m-deep test hole drilled in granitic rocks in the vicinity of a Tono mine. The investigation consists of flowmeter logging and geophysical logging. In flowmeter logging, a probe is moved up and down in the hole at a constant speed by use of a cable, and the cable speed and impeller revolution are used to workout the relative speed of the fluid in the hole. In the geophysical logging, a probe attached to the leading end of a logging cable is replaced with other probes so as to acquire different geophysical data. In a hole drilled in a crack-abundant rockbed such as a granitic rockbed, the inflow and outflow of ground water is governed mainly by water-permeable crack zones, and the result of the flowmeter logging show that this hole has three highly water-permeable zones. Using the results of the loggings, a correlative equation is worked out between changes in flow speed and changes in permeability index obtained by hydraulics tests. Among the various results achieved by the geophysical logging, a fine correlationship is found between an equation relative to permeability obtained using electricity and density and water-permeability indexes obtained by hydraulic tests conducted in situ. 4 refs., 8 figs., 1 tab.

  14. Optimization of the ship type using waveform by means of Rankine source method; Rankine source ho ni yoru hakei wo mochiita funagata saitekika ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Hirayama, A; Eguchi, T [Mitsui Engineering and Shipbuilding Co. Ltd., Tokyo (Japan)

    1996-04-10

    Among the numerical calculation methods for steady-state wave-making problems, the panel shift Rankine source (PSRS) method has the advantages of rather precise determination of wave pattern of practical ship types, and short calculation period. The wave pattern around the hull was calculated by means of the PSRS method. The waveform analysis was carried out for the wave, to obtain an amplitude function of the original ship type. Based on the amplitude function, a ship type improvement method aiming at the optimization of ship type was provided using a conditional calculus of variation. A Series 60 (Cb=0.6) ship type was selected for the ship type improvement, to apply this technique. It was suggested that optimum design can be made for reducing the wave making resistance by means of this method. For the improvement of Series 60 ship type using this method, a great degree of reduction in the wave making resistance was recognized from the results of numerical waveform analysis. It was suggested that the ship type improvement aiming at the reduction of wave-making resistance can be made in shorter period and by smaller labor compared with the method using a waveform analysis of cistern tests. 5 refs., 9 figs.

  15. Fundamental study on leak detection of underground gas pipeline using passive acoustic method; Judogata onkyo keisoku ni yoru maisetsu gas dokan hason kasho no kenshutsu ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Jinguji, M; Imaizumi, H; Kunimatsu, S; Isei, T [National Institute for Resources and Environment, Tsukuba (Japan)

    1997-05-27

    With an objective to detect gas leaking from an underground gas pipeline, discussions have been given on a method which utilizes acoustic characteristics of leakage. On leaking sound generated from damaged portions, the form of damaging was hypothesized as pinholes, and spectra of leaking sounds from holes with different diameters were measured. The dominant frequency decreases as the hole diameter increases, while it is in a region of relatively high frequency of 1 kHz or higher. However, detection from the ground surface was impossible when cover soil has thickness from 0.5 to 1.5 m. In an experiment to measure leaking sound inside the pipe, pressure in the pipe was adjusted to 0.02 atm which is a standard pressure for a low-pressure pipe, and the sound was measured when the hole diameters were varied. In any of the results obtained by varying the hole diameter, spectra having the dominant frequency in the region of 1 kHz or higher were measured. In addition, it was found that sound pressure difference of as much as 50 dB at maximum is generated as compared with a case of no sound leakage. The above results verified that monitoring the high frequency of 1 kHz or higher is effective in detecting leakage from small damages. 2 refs., 4 figs.

  16. Study on load levelling by means of the control of air conditioner operation; Kuchoki kado seigyo ni yoru fuka heijunka ni kansuru ichikosatsu

    Energy Technology Data Exchange (ETDEWEB)

    Sasaki, H. [Hiroshima University, Hiroshima (Japan); Sadakuni, S. [Japan Broadcasting Corp., Tokyo (Japan)

    1995-04-20

    The recent drastic increase in the number of air conditioners has caused sharp and narrow peaks in summer seasons due to the inherent temperature sensitive characteristics. The authors proposed to reduce the peak power demand by controlling air conditioner operations, verifying its effectiveness on peak demand clipping. However, the former study has shortcomings in that any qualitative treatment of room temperatures or pleasant feeling was not attempted and it did not provide a way of assessing peak demand clipping in a power system as a whole. In this paper, we shall first propose a new control method that can compromise pleasant feeling and reduction in power demand. Although air conditioners are used to pursue `pleasant feeling`, this contradicts to reduce power consumption and further more the concept of `pleasant feeling` is very vague. Hence, `Weber-Fechner`s law` is utilized to quantify the pleasant feeling which is treated as fuzzy quantity. Fuzzy co-ordination method is used to compromise power demand curtailment and pleasantness. In the second part of this paper, we shall propose an approach of assessing the amount of peak load clipping when the newly proposed control strategy is adopted in a real size power system: A decrease in the required generation capacity is estimated provided that the Loss of Load Probability (LOLP) is maintained at the same level before and after the application of the new control strategy. The reduction can be regarded as a dividend of load management. 5 refs., 9 figs., 5 tabs.

  17. Tyre noise predictions from computed road surface texture induced contact pressure; Romen no outotsu ni kiinsuru sesshoku atsuryoku ni yoru tire soon no suitei

    Energy Technology Data Exchange (ETDEWEB)

    Mikami, T. [Japan Automobile Research Institute Inc., Tsukuba (Japan)

    1999-07-01

    A method for tire/road noise prediction is studied based on the result of road surface profile measurement (horizontal direction measurement interval 3mm, horizontal direction measurement accuracy 8{mu}m, distance measured 1655m, using a laser-aided profile meter). The obtained road surface profile is used for the calculation of contact pressure that occurs between the tire tread and road surface (using the 2-dimensional calculation model of Clapp et al.). For the examination of the relationship between the contact pressure and generated noise, tire noise is measured using a microphone array provided near the tire circumference. The frequency spectral ratio between the generated noise and contact pressure is determined as a transmission function. It may be said that the transmission function is unique to the tire, not dependent on the road surface profile. The road surface profile is determined by use of the transmission function, and this enables the prediction of the noise from the tire. Noises were measured on several kinds of road surfaces different in coarseness for a passenger car and truck, and the values from these actual measurements are compared with the predicted values, and then it is found that the prediction model is valid. (NEDO)

  18. Hydraulic mechanism of siltation in approach channels and harbors. Siltation ni yoru koroter dot hakuchi maibotsu no suiri kiko ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Irie, I [Kyushu Univ., Fukuoka (Japan). Faculty of Engineering; Murakami, K; Tsuruya, H [Ministry of Transportation, Tokyo (Japan). Port and Harbour Research Inst.

    1991-11-20

    The phenomena that clay or mud is carried away by waves or currents and deposited in approach channels and harbors are called siltation, and hinder often seriously the navigation of vessels and their arrival at as well as departure from wharves, etc.. In this paper, the hydraulic mechanism of siltation in harbors and approach channels in the sea area is chozen in particular, and waves and currents as the external force governing the travel of bottom mud, the properties of sunken mud, the supply source of sunken mud in approach channels, and grasping of the mud sinking mechanism as well as countermeasures against mud sinking are stated mainly centering around the results obtained from the in situ observations at Kumamoto Port and Banjarmasin Port and their mathematical calculations. The bottom mud traveling mechanism has been accepted as a study subject respectively from such wide viewpoints as river engineering, agriculture, environmental engineering, sanitary engineering, chemical engineering and mechanical engineering, and in addition, it has been under study by coastal engineering. Siltation under the wave actions is still in the state of research even in advanced countries in America and Europe. The siltation research in Japan has a short history, but this is the field which must be coped with positively. 19 refs., 17 figs.

  19. Disinfectants used in medal field and problems caused from their use. Igaku ryoiki ni okeru sakkinzai to sorera shiyo ni yoru mondaiten

    Energy Technology Data Exchange (ETDEWEB)

    Okuda, K; Watabe, S [Yokohama City University, Yokohama (Japan). School of Medicine

    1994-04-05

    This paper describes typical anti-microorganism chemicals used in hospitals, and touches on measures against intra-hospital infection. Killing microorganisms reliably by using a high-pressure steam sterilization method is the best means for medical devices and apparatuses. However, there are high-priced medical devices that cannot withstand such a method and require other processes according to the situations, such as gas sterilization and alcohol disinfection. In addition to such sterilization methods as using heat, alcohols, and gases, methods that have been developed recently may include the following: use of Bronopol (an antiseptic) and anti-mold agents that have electronphilic functional groups, disinfectants using metal ions from silver, zinc and copper, and other materials. The problem of intra-hospital infection is caused typically by MRSA, hepatitis virus and Pseudomonas aeruginosa. Preventive measures require good knowledge about their infection courses and disinfecting technologies, as well as an attention not to cause change in the ecology as a result of using excessively strong chemicals. 18 refs., 1 fig., 1 tab.

  20. Analysis of flow and turbulence in high pressure spray by image processing technique. Gazo shori ni yoru koatsu funmunai ni okeru ryudo to midare no kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Yamaguchi, I. (Japan Automobile Research Institute, Inc., Tsukuba (Japan)); Nishida, M.; Nakahira, T.; Komori, M.; Tsujimura, K.

    1992-07-01

    The image processing technique (reported previously) developed for analyzing combustion in a diesel engine was applied to measuring flow and turbulent intensity in a high pressure spray. Copper vapor laser beam in a sheet form with a thickness of 0.2 mm was injected into the cross section of a spray center in a container. Photographs of the scattered lights of the beam is converted into digital values and analyzed using an image processing equipment. With the laser light emitting frequency set to 20 KHz at a maximum, the flow velocity is measured from changes in photographic image density in two subsequent photographs, and the turbulence intensity from changes in brightness intensity. As a result, it was clarified that the flow velocity and the turbulence intensity in the spray cross section increase with raising the spray pressure. Further discussions are being made on the measuring method, including changes in the image brightness associated with entrance and exit of spray particulates into the laser beam sheet, and effects of the laser beam sheet thickness on the measurements of the turbulence intensity. 6 refs., 6 figs.

  1. Characteristics of radiation temperature and radiosity coefficient by means of infrared radiometer. Sekigai hoshakei ni yoru zairyo hyomen no hosha tokusei ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Okamoto, Y; Kaminaga, F [Ibaraki University, Ibaraki (Japan). Faculty of Engineering; Ishii, T; Sato, K [Ibaraki University, Ibaraki (Japan); Kurokawa, T [NEC San-ei Instrumentsu Ltd., Tokyo (Japan)

    1991-12-25

    A radiation thermometer was applied to the measurement and analysis of radiation temperature of the material surface. In this paper, the characteristics of the radiation temperature and the radiosity coefficient of gray body materials are investigatied. An infrared radiometer was used, which detects radiation energy in the region between 8 and 13{mu}m of wavelength. This infared radiometer has a Hg-Cd-Te photon radiation sensor. The variation of emissivity was measured for the four kinds of non-metalic materials, i.e., graphite, carbon fiber composite, Si-SiC ceramic, and black paint spread on an aluminum plate. As a result, the relationship between material temperature and radiation energy was made clear. Furthermore, the space-dependent variation of the radiation temperature and the radiosity coefficient was derived from the two-dimensional CRT image of the infrared radiometer. Consequently, the emmisivity variation gave a maximum for the carbon fiber composite surface rich in irregularity, and decreased in the order of graphite, Si-SiC, and black paint. 7 refs., 15 figs.

  2. Stability analyses of urban water supply systems with wastewater reuse; Toshi haisui no junkan riyo ni yoru mizu kyokyu anteika ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Watanabe, H.; Zhang, S. [Meijo Univ., Nagoya (Japan); Okada, N. [Kyoto Univ., Kyoto (Japan). Disaster Prevention Research Inst.

    1995-10-20

    Wastewater reuse can be considered as a type of water resource development which is expected to improve the aquatic environment, as well as the stability and reliability of municipal water supply systems. To this extent, wastewater reuse has been taken into account in the planning of water supply systems in several Japanese cities. However, to date the effect of wastewater reuse on water supply system stabilization has not been discussed quantitatively, and the relation between waster water reuse rate and water supply system stability has not been analyzed. In this study, a stochastic model has been presented to evaluate the stability of water supply systems with optimal wastewater reuse rate. Some theoretical analyses and numerical studies were performed, and all of the results have shown that the model is reliable for not only basic studies on water supply system stability, but also for practical use as well. 5 refs., 5 figs., 3 tabs.

  3. Development of multi-filter spectroradiometry; Filter hoshiki ni yoru bunka hosharyo no keisoku hoho to sono supekutoru no hyogen hoho ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Miyake, Y; Aoshima, T; Minoda, T; Kato, T; Kondo, S [Eiko Instruments Trading Co. Ltd., Tokyo (Japan)

    1996-10-27

    Described in this paper is a technique of solar radiation spectroradiometry in which high-resolution wavelength computation adds to a multi-filter method. The solar spectrum upon entering the atmosphere is scattered and absorbed by parameter-constituting elements such as gas, aerosol, cloud particles, etc., and its spectral contour is complicatedly deformed relative to wavelength. Taking advantage of the fact that the scattering and absorbing characteristics of some of the elements are constant relative to wavelength, a simple equation was constructed to enable high-resolution spectrum measurement wavelength-wise, and this compensates for the limit in measurable wavelength that the conventional multi-filter method suffers from. The new method discussed here is not so expensive as the grating method thanks to the employment of filters, is capable of determining spectral radiation quantities with a precision of {plus_minus}5%, and is reduced in terms of the capacity of memory for data storage. The new method enables data collection under various atmospheric conditions that the four seasons present, which the difficult-to-apply and expensive spectroradiometer fails. It is expected that this method will find its use in collecting basic data for the designing of photovoltaic power generation systems, in the study of photochemical reaction in agriculture, and in collecting basic data for daylight lighting. 1 ref., 6 figs., 2 tabs.

  4. Research on giving antibacteria activity of tailored dental materials; Gin ion ni yoru shikayo zairyo no kokinsei fuyo ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    The secondary dental caries easily occur by breeding of bacteria in cavities between living body and composite resin, false tooth or root of tailored tooth as tooth repairing materials. The antibacteria activity of tailored dental materials was thus studied by implanting Ag ion. The antibacteria effect with time after culture of caries bacteria was studied by implanting Ag ion into SiO2 powder, PMMA samples and Ti alloy samples at 20 and 200keV in energy of ion. In addition, the antibacteria activity of SiO2 powder as composite material was found at 25keV which was previously effective for the antibacteria activity. This SiO2 filler (Ag{sup +} filler) showed the antibacteria activity on every bacteria sample after 2h, and in particular, could kill all of 3 kinds of bacteria obtained from a composite resin surface after 12h. The number of living S. salivarius was reduced by half after 12h. The application of the composite resin filler implanted with Ag{sup +} is significant to prevent recurrence of caries. 5 refs., 27 figs., 7 tabs.

  5. Study on a new type variable valve lift timing mechanism with a three dimensional cam; Sanjigen cam ni yoru shinkahen valve lift timing kiko ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Ogura, M; Song, C [Nippon Institute of Technology, Saitama (Japan)

    1997-10-01

    The variable valve timing mechanism was invented to get a torque band at wide engine speed, and to reduce a compression job and pumping loss by a miler cycle at partial load. In this paper, the new type variable valve timing mechanism applying a three dimensional cam was proposed. Also, the feature of mechanism and the control system was done obviously. Further, about a miler cycle, a thermodynamics -like consideration was described. 5 refs., 8 figs.

  6. Ni hombres ni mujeres providenciales

    OpenAIRE

    Montaño Virreira, Sonia

    2000-01-01

    Debo advertir a la y el lector de este texto que lo que a continuación se presenta no es, ni de lejos, una propuesta realista, si por ella entendemos la traducción, enclave mujer, de las actuales tendencias de liderazgo político vigentes en la región. Por el contrario, intento argumentaren favor de un liderazgo que supere el caudillismo como estilo y se aproxime al máximo hacia el respeto de las formas, entendiendo que sin ellas no es posible construir la democracia. Para hacerlo reviso rápid...

  7. Fiscal 1997 survey report. Feasibility study of the environmentally friendly type coal utilization system (survey of the coal utilization in Pakistan); 1997 nendo chosa hokokusho. Kankyo chowagata sekitan riyo system kanosei chosa (Pakistan ni okeru sekitan riyo gaikyo chosa)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    This paper made a literature survey, hearing survey, site survey/study on the coal in Pakistan such as the coal utilization system and the environmental situation, etc., and aimed at pre-examination for the survey of the introduction of the environmentally friendly type coal utilization system to be planned in Pakistan in the future. The examination, data collection and preparation were conducted in terms of the following items: the structure of coal consumption in energy supply, structure of coal consumption, mainly of domestic brown coal consumption, the situation of coal utilization by industry and by region, environmental problems caused by coal utilization such as air pollution, the trend of policies of environmental regulation, etc. The literature on the following was obtained and surveyed: the situation of economy/energy in Pakistan, coal utilization technology by industrial field, and environmental protection technology. The hearing survey was made to institutions concerned, corporation groups and men of learning and experience. Site surveys were conducted for the typically selected coal utilization equipment and existing environmental protection equipment. 66 figs., 56 tabs.

  8. Research and survey report of FY 1997 on the CO2 balance for high-temperature CO2 fixation and utilization technology; 1997 nendo chosa hokokusho (nisanka tanso koon bunri gijutsu ni okeru CO2 balance ni kansuru chosa kenkyu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    The purpose of this research is to clarify the application condition and effectiveness of high-temperature CO2 fixation and utilization technology. To evaluate the present process, it was compared with others, such as separation using a polymer membrane, physico-chemical absorption process, adsorption process, hydrogen contact reduction process, and biological fixation. The development trends of absorption, membrane, adsorption, and cryogenic separation were investigated. The questionnaire was carried out about the separation technologies which are in the stage of performance test using actual gas, to arrange and compare the data and information. The current trends of chemical and biological CO2 fixation and utilization technology were also investigated for arranging the subjects. High-temperature CO2 disposal by the carbonation in concrete waste has been studied, to clarify its application conditions and effectiveness. In order to compare the separation technologies, treatment processes of CO2 in the exhaust gas from boilers of LNG power generation and coal fired power generation were simulated. These processes were simulated by ASPEN PLUS for the modeling. Trends of application of ASPEN PLUS and collection of information were surveyed by participating in the ASPEN WORLD. 103 refs., 51 figs., 55 tabs.

  9. Research report of fiscal 1997. Survey on creation of high-efficiency renewable resources, and bioconversion technology; 1997 nendo chosa hokokusho. Kokoritsu saisei kano shigen no sosei narabi ni bioconversion gijutsu ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    Survey was made on material production technology using creation technology of high-efficiency renewable resources (photosynthesis reaction of plants). Industrially usable plant resources in overseas countries and Japan were arranged, and plant resources unused for food were also surveyed. The present state of genetic engineering necessary for metabolic engineering of higher plants such as fit and high-expression technology of genes, plant cell cultivation, and control technology of plant cell multiplication is described, and elementary technologies required for future gene-recombined plants are predicted. Survey was also made on the trend of creation technology of industrial plants for fat and oil, biodegradable polyester, amino acid, cellulose, fiber (cotton) and forest wood. A patent list on plant biotechnology was prepared, and study on bioconversion of plant resources was also surveyed. Overseas R & D trends on conversion and effective use technologies of renewable bio- resources are reported, and process design and its profitability were evaluated through a case study. 414 refs., 87 figs., 55 tabs.

  10. FY 1997 report of survey on the intellectual property in international collaboration research project; 1997 nendo chosa hokokusho (kokusai kyodo kenkyu ni okeru chiteki zaisanken ni tsuite no chosa hokokusho)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    In promoting international collaboration research project, coordination of the patent system of each country which participants to the project belong to has broad implications in concluding the contract for the project. For example, in Japan, 100% of the patent belongs to the government for contrast or collaboration project with the government. While, in the USA, the patent developed by the private company belongs to the private company even for the contrast project. In Japan, the shared patent can not be transferred to the third party or implemented without agreement with the partner. While, in the USA, the shared patent can be transferred to the third party or implemented without agreement with the partner. Due to such a difference, some projects can not be established by ill coordination of intellectual property even when the meaning of the projects is well understood. In this survey, was investigated the outline of patent systems of major countries to study about what should well balanced treatment of intellectual property in international collaboration research project be in the future. 4 figs., 8 tabs.

  11. FY 1997 report on the research study for preparation of NEDO`s vision. Biomass energy; 1997 nendo chosa hokokusho (NEDO vision sakutei ni muketa chosa kenkyu). Biomass energy ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    Research study was made on the current usage, technological development and future subjects of biomass energy. The current use of biomass energy over the world estimated to be nearly a billion t/y oil equivalent. This value is estimated to be only a part of a pure primary biomass yield of 73 billion t/y oil equivalent showing a large supply potential. The evaluation result of a biomass energy potential in the world by GLUE (Global Land Use and Energy Model) considering worldwide biomass flow and competition of land use showed that no change of land use form in advanced areas is predicted, and no production of new biomass energy from forests in advancing areas is also expected. Production of biomass energy from farm products is promising in advanced areas, while the potential of biomass residue is high in advancing areas showing the possibility of energy development. Development of new biotechnologies such as molecular control of bio-production functions is expected to increase biomass resources. 76 refs., 26 figs., 30 tabs.

  12. Fiscal 1997 report on the survey of the actual state of various coal related industrial furnaces in China; 1997 nendo chosa hokokusho (Chugoku ni okeru sekitan ni kakawaru kakushu kogyoro no jittai chosa)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    It is thought that environmental prevention technologies related to boilers which are the largest coal use field in China have been almost all made model projects till now. Further, coal or coke is used in various industrial furnaces except boilers in every industrial sector in China. The amount of coal use there is large next to that in boilers, which is a cause of the country`s serious air pollution. Accordingly, an investigation was commenced in fiscal 1997 aiming at grasping the actual state of environmental pollution caused by various coal related industrial furnaces in China and studying the environmental improvement. This time, various industrial furnaces were examined in chemical and iron/steel industries. It could be inferred that both industries made efforts to enhance and rationalize production activities and then give consideration also to the environmental prevention. Generally, however, most plants still have old-fashioned production facilities, while the facilities are being modernized little by little. It was found that in China productivity was lower than Japan and the environmental pollution was in a serious condition. 16 refs., 28 figs., 69 tabs.

  13. Fiscal 1997 survey of the overseas coal import base preparation/improvement. Survey of a coal flow in China; 1997 nendo kaigaitan yunyu kiban seibi sokushin chosa. Chugoku ni okeru coal flow ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    The paper surveyed the preparation of the coal transportation infrastructure, status of its running, economical efficiency, etc. in terms mainly of the trend of coal production/consumption in China, and coal railroad/water transportation and electric power transportation by mine-mouth power generation. From the survey, the following conclusions were obtained. As to the coal which China uses as a main energy for maintaining the present high economic growth as targeted, there will remain the coal transportation problem between production site (north and west) and consumption site (east and south) still in the future (in 2000 and 2010). China is now facing with a big turning point in a socioeconomic aspect. The advancing opening market policy brought steep rises in energy prices such as coal and electric power, which is affecting various fields. Further, the energy related laws, which were unprepared, are abruptly being prepared, and the environment for the introduction of foreign investment, which is expected to be accelerated, is being prepared. In the future, attention should be paid to environmental problems such as air pollution, acid rain and global warming. 48 figs., 96 tabs.

  14. Survey on bio-chemical complex harmonized with global environment. 3; Kankyo chowagata seibutsu kagaku konbinato ni kansuru chosa. 3

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    A survey was conducted of bio-chemical complex harmonized with the global environment for the purpose of constructing the material production process harmonized with the environment by the process fusion between biological conversion and chemical reaction. Palm oil was taken up as renewable raw material plant resource. The process utilizing bio-chemical reaction advances at normal temperature and pressure and is high in reaction specificity and selectivity. This is a recycling, circulation and environmental harmony type production technology which brings high yield, energy conservation, resource conservation, and low environmental loads. Waste water treatment and production of useful substances from sludge were thought as elementary technology. A possibility was studied of enzyme production by culturing solid waste, and the enzyme was applied to the hydrolysis process. The paper indicated trace components in the palm oil and the extraction method and proposed the production process of new derivatives for adding value to hydrolysate. A study was also made of the overall process flow which integrated these new processes and the material balance. The comprehensive evaluation of this new process was made from the aspect of the product structure, the market, construction cost, economical efficiency, and the environment. 133 refs., 65 figs., 56 tabs.

  15. 1000m depth boring at Inagawa, Hyogo prefecture. 1. Overviews; Hyogoken Inagawamachi ni okeru 1000m boring chosa. 1. Gaiyo

    Energy Technology Data Exchange (ETDEWEB)

    Sato, T; Kusunose, K; Cho, A; Tosha, T [Geological Survey of Japan, Tsukuba (Japan); Kiyama, T; Yamada, F [Mitsui Construction Co. Ltd., Tokyo (Japan); Aizawa, T [Sancoh Consultants Co. Ltd., Tokyo (Japan)

    1996-05-01

    Various field experiments were carried out using a 1000m deep borehole at Inagawa town, about 10km north of the focus of the Hanshin-Awaji Great Earthquake and directly above the area where shallow earthquake activities have intermittently occurred. These experiments included stress measurement by hydraulic fracturing, hydrophone-aided VSP, permeability tests and observation of various types of logging. The laboratory experiments were also carried out, including measurement of various properties and stresses of the core samples. The stress-depth relationship, determined by the hydraulic fracturing method, shows that the stress gradient well coincides with the Western Japan standard at a depth up to 700m, whereas it is approximately twice as high as the standard at a depth of 946m, at which core disking and borehole break-out are clearly observed, and hence stresses conceivably concentrate locally. Orientation of the maximum horizontal compressive stress is E-W at a depth of around 600m, but greatly changes to NNW-SSE at a deeper position. 4 refs., 5 figs.

  16. Report on survey/research on energy-related elementary techniques; Energy kanren yoso gijutsu ni kansuru chosa kenkyu hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    The survey/research project is implemented for establishing environment-compatible energy systems in urban areas by constructing wide-area heat supply networks to exchange energy among cities. This project studies, taking Kanagawa Pref. as the model area, distributions of unutilized energy sources, and possibilities of their utilization for heat supply. There are large quantities of unutilized energy, including waste heat from power plants, general works and cleaning works, and low-temperature waste heat from, e.g., sewage and pumping systems. The district air conditioning promotion areas are selected from those consuming large quantities of heat energy in the prefecture, and their characteristics are grasped. The effects of the networks on total energy consumption of the entire prefecture are estimated for the cases of introducing the district air conditioning systems or wide-area heat supply networks in these selected areas. Introduction of optimum advanced heat utilization systems in stereotyped areas is also considered, in order to predict the effects of introduction of wide-area heat supply networks. (NEDO)

  17. Fiscal 2000 study on technology and marketability concerning phytoremediation; 2000 nendo phytoremediation ni kansuru gijutsu oyobi shijosei no chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    An investigative study was conducted on phytoremediation with the purpose of correcting soil contamination caused by heavy metals and the like. In Japan, in connection with the cadmium pollution along the Jintsugawa River region in Toyama Prefecture, a growth of botanical colony such as Athyrium ykoscense was confirmed having a high capacity in absorbing/accumulating heavy metals, with a possibility suggested that they may be utilized for phytoremediation. In a technological research for restoring the environment sustainingly in a wide area, feasibility has been proven to remove polluting agricultural chemicals in farmlands and toxic substance in old industrial sites by making forest trees like poplars, lawns and herbage function. In a project for the cleanup of oil contaminated soil after Gulf War, a demonstrative test of bioremediation for one hectare was performed and, after 15 month experiment, 80 to 90% of aliphatic compounds and 50 to 60% aromatic compounds were degraded. In EU Framework Program in Europe, phytoremediation projects have been implemented across the member countries. (NEDO)

  18. Investigation on structuring the human body function database; Shintai kino database no kochiku ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-03-01

    Based on the concept of human life engineering database, a study was made to know how to technically make such a database fittable to the old people in the age-advancing society. It was then proposed that the old people`s human life engineering database should be prepared to serve for the development and design of life technology to be applied into the age-advancing society. An executive method of structuring the database was established through the `bathing` and `going out` selected as an action to be casestudied in the daily life of old people. As a result of the study, the proposal was made that the old people`s human body function database should be prepared as a R and D base for the life technology in the aged society. Based on the above proposal, a master plan was mapped out to structure this database with the concrete method studied for putting it into action. At the first investigation stage of the above study, documentation was made through utilizing the existing documentary database. Enterprises were also interviewed for the investigation. Pertaining to the function of old people, about 500 documents were extracted with many vague points not clarified yet. The investigation will restart in the next fiscal year. 4 refs., 38 figs., 30 tabs.

  19. Trend of advanced technology of micromachines in the USA; Beikoku ni okeru micro machine sentan gijutsu doko chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    In this research, the data of advanced technology of micromachines in the USA have been searched, collected, and arranged from the US patent information, technical journal information, and newspaper and general journal information. According to demand, the main undertaking information was interviewed from well-informed persons. The data were compiled as advanced technology trend of micromachines in the USA. Sensors are remarkably predominant in the elemental technology. There are also important topics in the fields of actuators, motors, lenses, devices, and structures. On the other hand, materials, etchings, packages, motive powers, and softwares are also important elemental technology in spite of their less information. From the viewpoint of usage, detection systems are remarkably predominant. Then, robots, processing systems, optics, analysis systems, motive power systems, medical systems, and acoustic systems are also important. From the viewpoint of industrial sector, the environmental items are predominant. Automobiles, medical treatments, and information communications follow the above. When new relationships to the secondary usage and tertiary usage are not found, it would be rather hard to express such a technology development trend more clearly.

  20. Survey on peripheral techniques of brown coal liquefaction techniques; Kattan ekika gijutsu ni kansuru shuhen gijutsu no chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1980-09-01

    Described herein are results of survey on brown coal liquefaction techniques and peripheral techniques, centered by COSTEAM process under development in USA, solubilization by alcohol and liquefaction and cracking with the aid of tetrahydroquinoline as the hydrogen donor under development in Japan, and low-temperature carbonization and new promising techniques. The COSTEAM process shows higher reaction rates, conversions and oil yields for brown coal liquefaction than the one using hydrogen gas. Some of the problems involved in this process high viscosity and oxygenated compound content of the product oil. The product oil is acceptable as fuel for power generating plants and can be produced at a moderate cost, but may be unsuitable as vehicle fuel. Coal liquefaction and solubilization processes are mainly represented by those which use hydrogen. The hydrogen cost, which is high, determines the product price. The processes which use alcohol or tetrahydroquinoline are still in the experimental stage. (NEDO)

  1. Survey of regulations accompanied with isolation technology of carbon dioxide; Nisanka tanso no kakuri gijutsu ni tomonau hokisei no chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    Regulations, conventions and agreements relating to the discharging liquefied carbon dioxide (CO2) into the bathypelagic zone from a cruising ships are investigated. The ocean storage of CO2 is not specifically prohibited by law, but must be regulated on a global scale because such treatment may impact the marine environment. In principle, treatment with impact on the nature is prohibited. Laws of environmental conservation are completed in European, Asian, and Pacific countries, which join international conventions and committees with high interests. It is suggested that the engineering technique of the storage should be improved to observe regulations and that an impact assessment for the ocean storage should be carefully conducted in full understanding of the basic premise of the regulatory systems or organizations. Furthermore, it is significant to study on the possible effect of the ocean storage of CO2 on global warming and life-cycle assessment inventory analysis, namely the balance of the energy budget between the separation and the ocean storage of CO2. 23 refs., 7 figs., 6 tabs.

  2. Research trend survey on the stable isotope utilization technology; Antei doitai no riyo gijutsu ni kansuru kenkyu doko chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    This report reviews the activities and the trends in the area of the stable isotope use attracting attention recently. In the medicine and clinical treatment sector, the remarkable trends are the extension of {sup 13}C use. The breath test and the magnetic resonance spectroscopy (MRS) diagnosis have been developed as inspection methods. It is noted that investigation has been initiated on the magnetic resonance imaging (MRI) using {sup 3}He and {sup 129}Xe for the lung imaging. In the organic chemistry and biochemistry sector, the stable isotopes are used for analyzing the structures of complicated natural compounds and materials relating to life science and for analyzing the chemical reaction mechanism of organic compounds. In the nuclear energy sector, {sup 10}B and {sup 7}Li have been used as neutron absorption materials and pH neutralizing reagent, respectively. In the analysis and measurement sector, the process of isotopic dilution is used for the environmental analysis of trace elements including harmful substances. Among various separation methods of isotopes, well studied uranium enrichment processes and deuterium separation processes are described. Separation of {sup 15}N by ion exchange resin method and plasma ion cyclotron resonance (ICR) isotope separation have been studied, recently. 133 refs., 53 figs., 7 tabs.

  3. Surveys and researches on trends of technologies related to hydrogen; Suiso ni kansuru gijutsu doko chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1983-03-01

    This report covers surveys of the latest technological trends in relation to the production, storage, and transportation of hydrogen as energy. Also included in the report are surveys of hydrogen, fuel cells, and wind energy centering about Europe. At the 4th World Hydrogen Energy Conference (Pasadena, U.S., June 1982), a number of essays were presented concerning the utilization of hydrogen, production of hydrogen, thermochemical processes, hybrid processes, photochemical processes, photo/thermochemical processes, other processes, fuel cells, metallic hydrides, etc. This report particularly describes in detail the trends of technologies involving the production of hydrogen by the electrolysis of water and by thermochemical processes. As for the recent trend of the metallic hydride technology, reports are made on the International Symposium on the Properties and Applications of Metal Hydrides (Toba, Japan, June 1982) and on Japan's research on the application of metallic hydrides. Concerning the trends in Europe of technologies relative to hydrogen, fuel cells, and wind energy, the results of the research group's on-site investigations are reported. (NEDO)

  4. Water quality and water pollution sources in Poyang lake, China; Poyang ko ni okeru suishitsu chosa to odakugen kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Ito, M. [Shin-Nippon Meteorological and Oceanographical Consultant Co. Ltd., Tokyo (Japan)

    1996-01-10

    This paper summarizes the current status of water quality and pollution sources in Poyang Lake in China. The lake is located in Chianghsi Province of China, and a largest fresh water lake in China that flows out into the Yangtze river. The basin is surrounded by mountains on three sides and faces the Yangtze on one side, whereas the plains formed by the lake and the rivers flowing in extends in the center of the basin. The plains around the lake has the city of Nanchang, the capital of the province, the city of Jiujiang (both cities have a population of about 4 million, respectively), and four other cities with a size of one million people including Jingdezhen. Water supply system in the basin is used in a 37% area of the urban areas, and no sewage facilities of whatsoever are available as of 1991. The lake has COD of about 3 mg{times}1/l. No severe pollution by organic matters is seen. While the T-P concentration is at a high level, PO4-P is low. Majority of phosphorus flowing into the basin exists in the form trapped in soil particles. In order to maintain the current water quality in the future, waste water treatment is required in the basin. Construction of an oxidation pond in the vast land exposed during the drought period is a measure that can be tackled relatively easily. 1 fig., 4 tabs.

  5. Survey of an evaluation method for research and development projects; Kenkyu kaihatsu project no hyoka shuho ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    This report describes an interim evaluation method and a concrete evaluation method for projects promoted by the Agency of Industrial Science and Technology, and NEDO. As a result of the survey, a method of highly practical interim evaluation, concrete evaluation items, and evaluation criteria have been proposed by assuming that the projects are evaluated by the project evaluation department independent of the project promotion department. Long-term issues for constructing the evaluation system are also described. It is the most essential for the evaluation to fulfill the function of effective promotion of the following projects. It is also indispensable for the evaluation method and issues proposed in this report to communicate closely to project promoters and researchers, and to reassess the projects continuously. Continuous consideration for the feedback of evaluation process and the improvement of evaluation are significant for the long-term construction of system. 21 refs., 9 figs., 23 tabs.

  6. Investigations on international standardization of environmental management systems. 3; Kankyo kanri system no kokusai hyojunka ni kansuru chosa. 3

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    Japan as an ISO member country identifies the state of discussions in the environmental management standard deliberation committee at ISO. Investigations were performed on international standardization of environmental management systems for the purpose of participating and cooperating in preparing and establishing international standards related to environmental management, and playing part in working, solving and improving environmental problems. Under the circumstances that environmental problems are drawing worldwide interest, the International Organization for Standardization (ISO) has been carrying out since 1993 deliberations on environmental management standards to institutionalize environmental management rules to check effects of business activities on the environment. The International Organization for Standardization/Environmental Management Technical Committee (ISO/TC207) was installed, at which series number of 1400 order was allotted for environmental management related standards, and major standards have come to a final stage of standard formulation at the TC207 Oslo conference in June 1995. In Japan, the Ministry of International Trade and Industry has established an environmental management standard deliberation committee composed of people of experience or academic standing to advance discussions on how the environmental management should be in business entities through deliberations on ISO standards.

  7. Investigations on installation of the heat exchange system in geothermal wells; Chinetsu koseinai netsukokan system donyu ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    The heat exchange system in geothermal wells is a system that replaces the air source heat pump and uses underground beds or groundwater as a heat source to heat rooms by collecting underground heat in winter, and cool rooms in summer by operating a heat media circuit in reverse direction through the action of a reverse flow valve to discharge heat underground. This paper describes feasibility investigations on the system including its technical trend for introducing the system technology. Technological and economic discussions were given by classifying the intra-well heat exchange device in its installation direction (horizontal loop type and vertical installation type), underground heat exchange media (antifreeze solution/water cyclic system and direct expansion system), and underground heat transfer (heat conduction system and heat convection system). As a result of discussing each system, it was concluded that the following two systems are promising: A = vertical installation, antifreeze solution/water cyclic and heat conduction system, and B = vertical installation, antifreeze solution/water cyclic and heat convection system. Since the system B was found to have better efficiency and economy among both systems, it is necessary to verify an intra-well heat exchange system and operation methods that suit the system B effectively. 21 refs., 8 tabs.

  8. Indoor environment and allergy except housedust mite; Jukankyo to allergy ni kansuru dani igai no chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Nakao, F.; Nishima, S.

    1998-05-31

    Pathopoiesis factors of allergic diseases include immune antibody productivity sthenia reacting with antigens such as mite or the like in allergy reaction which is regarded as based on genetic fact (atopic diathesis), and environmental factors as external factors. The environmental factors are further classified into specific factors (antigens) and nonspecific factors. The former factors include the indoor factors such as mite, mould, animals bred indoor, etc., and outdoor factors such as pollen and so on. The latter factors include indoor factors such as passive smoking, carbon monoxide, nitrogen oxides, formaldehyde, etc., and outdoor factors such as sulfur oxides, nitrogen oxides, airborne particles and so on. In this paper, the environmental factors in relation to allergic diseases expect mite are introduced. Besides mould, cockroach/insect, fur dust and dandruff of animals, adjustment of room temperature/humidity, smoking, indoor and outdoor air pollution are mentioned as the environmental factors expect mite, and the cause-effect relations thereof are explained. 24 refs., 3 figs., 7 tabs.

  9. Investigation on development of advanced materials by solvothermal technique; Sorubo thermal hanno riyo senshin zairyo kaihatsu ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    Solvothermal reaction is reaction under high temperature and high pressure, which is expected to fabricate new functional materials. In this study, the materials are classified into two fields, i.e., inorganic materials, metals and their composites and organic materials and their composites. The current status of R and D of production and processing technology in each field is surveyed and the prospect of it is discussed. For the inorganic materials, metals and their composites, it is explained that very fine metal oxide particles, complex oxides, single crystals, whiskers, compounds with layer structure, metastable compounds, ion conductors and catalysts with high ability could be produced only by controlling the solvothermal reactions in atomic order. For the organic materials and their composites, surveyed results of the solvothermal technique using non-aqueous solutions are mainly provided. The necessity of a national project for researches on the solvothermal reactions is proposed from the viewpoint of resource, environment and energy. 777 refs., 38 figs., 26 tabs.

  10. Feasibility study on introducing new energy systems into Asian villages; Asia sonraku ni okeru shin energy donyu kanosei chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    For improvement of living standards in unelectrified areas of Asia, the feasibility of new energy power generation systems was surveyed. The degree of electrification of local areas is different every country, and Thailand is ahead of other countries, while Laos and Cambodia are most unelectrified. Power supply of 100W/house seems to be adequate for local areas because of weather condition, housing situation and life-style. Economic support and education on electricity are necessary for poor areas. Although needs for new energy is increasing, the priority is given to industrial and urbanized areas because of cost and investment effects, and remote areas are dependent on grant- in-aid. Resources of photovoltaic, wind power and micro- hydraulic energies are abundant, however, selection of energy and verification of its usability are important, and the local energy density maps were thus prepared. In introduction of new energy, after selection of energy suitable for an area concerned, such geographical and social conditions should be surveyed as road condition, water rights, land utilization, economic support system, policy and intention of inhabitants. 76 refs., 68 figs., 91 tabs.

  11. Outline and summary of research for a database of unused energy technologies; Miriyo energy ni kansuru data shu sakusei chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    For effective promotion of the new energy utilization project of NEDO and preparation of the future new energy vision, the data on unused energy were systematically arranged. The definition of heat supply systems using unused energy was clarified, and the kind and property of unused energy were arranged. Some typical systems of heat supply facilities using unused energy were presented. The data were classified by energy source, temperature level and region, and the detailed database was prepared for the typical systems. The overseas database was prepared, in particular, for European and American systems. Domestic and overseas policies, laws and subsidy systems were arranged. The introduction effect of two heat supply facilities using unused energy was surveyed, and their operation costs were analyzed. Basic terminology related to unused energy was compiled and explained. Related organizations, in particular, manufacturers were surveyed and arranged. The main manufacturers of a heat recovery refrigerator and waste heat boiler as typical equipment, and the number of these equipment shipped were arranged. 51 figs., 116 tabs.

  12. Fiscal 1993 investigational report on heat pump heat storage technology; 1993 nendo heat pump chikunetsu gijutsu ni kansuru chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1994-03-01

    This project is for an investigation into the heat pump (HP) use heat storage technology, with the aim of clarifying the present status of HP heat storage technology, the utilization status, and the developmental trend of technology and of contributing to the spread of heat energy effective use using HP heat storage technology and to the promotion of the technical development. Accordingly, the evaluation of the following was made: sensible heat (SH), latent heat (LH), chemical heat storage technology (CH), and heat storage technology (HS). Investigations were made on the sensible heat use heat storage technology of water, brine, stone, soil, etc. in terms of SH; the phase change sensible heat use heat storage technology of ice, hydrate salt, paraffins, etc. in terms of LH; hydration, hydroxide, 2-propanol pyrolysis, adsorption of silica gel, zeolite and water, and heat storage technology using metal hydride, etc. in terms of CH. In terms of HS, the following were studied and evaluated from the study results of the heat storage system in which HP is applied to the sensible heat and latent heat type heat storage technology: contribution to the power load levelling and the reduction of heat source capacity, heat recovery and the use of unused energy, improvement of the system efficiency by combining HP and heat storage technology. 24 refs., 242 figs., 56 tabs.

  13. Surveys and researches on trends of technologies related to hydrogen; Suiso ni kansuru gijutsu doko chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1983-03-01

    This report covers surveys of the latest technological trends in relation to the production, storage, and transportation of hydrogen as energy. Also included in the report are surveys of hydrogen, fuel cells, and wind energy centering about Europe. At the 4th World Hydrogen Energy Conference (Pasadena, U.S., June 1982), a number of essays were presented concerning the utilization of hydrogen, production of hydrogen, thermochemical processes, hybrid processes, photochemical processes, photo/thermochemical processes, other processes, fuel cells, metallic hydrides, etc. This report particularly describes in detail the trends of technologies involving the production of hydrogen by the electrolysis of water and by thermochemical processes. As for the recent trend of the metallic hydride technology, reports are made on the International Symposium on the Properties and Applications of Metal Hydrides (Toba, Japan, June 1982) and on Japan's research on the application of metallic hydrides. Concerning the trends in Europe of technologies relative to hydrogen, fuel cells, and wind energy, the results of the research group's on-site investigations are reported. (NEDO)

  14. Investigational study on construction of the physical function database; Shintai kino data base no kochiku ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    An investigational study was carried out on construction of the physical function database which can supply data useful for planning, design and production when companies provide products and barrier-free environment for the aged society. Up to now, the final image of database was studied as to the visual function. In addition, this study is aimed at constructing the physical function database. In the literature survey, basic data on physical characteristics of the aged which have lain scattered were collected and systematically sorted in relation to the exercise function in order to make an analysis of the data and measuring technology in terms of reliability, importance, and applied values. In the survey of corporate needs, an examination of concrete needs for the exercise function and auditory function was made for general companies and companies related to the medical and welfare apparatus field. As to the visual function, a study was conducted on selection of new items for visual measurement and measuring methods. In the study of the database structure, a pilot database was constructed and subjects were extracted. 529 refs., 57 figs., 15 tabs.

  15. Report on the actual situations of the commercially applied, industrial robots; Sangyoyo robot ni kansuru kigyo jittai chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1991-08-01

    Described herein are the actual situations of industrial robots as the FY 1991 questionnaire survey results. The questionnaires were sent to 541 factories, and 74% thereof were recovered. The major machine types fall into categories of manual manipulator, stationary sequence manipulator, remote controlling robot, sequence robot, playback robot, numerically controlling robot and intelligent robot. They are mainly driven by hydraulic, pneumatic, or electrical power. Their mechanism types cover polar coordinate, cylindrical coordinate, rectangular coordinate and articulation types, among others. They are mainly controlled by electronically, electrically (hydraulic or relay), or pneumatically. The major purposes for general works include casting, forging, resin processing, heat treatment, pressing, welding, coating, machining, cutting, assembling, reception/delivery of goods, and testing/inspection. The special works they are in service include those for power/gas/water services, construction works, and research and development. By work step, they are in service, e.g., for loading/unloading goods, palletising/packing goods, supporting, screening, welding, spraying/coating, grinding, clamping, assembling, and riveting. (NEDO)

  16. Fiscal 1995 investigation on biological fixation of carbon dioxide; 1995 nendo seibutsuteki CO2 kotei ni kansuru chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    To cope with the global warming caused by CO2, an investigation was conducted into biological fixation. It is necessary to make a many-sided and comprehensive study on the mechanism of CO2 fixation, the scale (area and carbon holding density), the rate and the environmental impact of the introduction of the technology and the technical problems, and to make a quantitative evaluation of each of the methods in order to make them practical proposals. The global ecosystem is classified into the land biota and ocean biota, and each typical ecosystem was surveyed in terms of the surface area, the carbon holding amount (presently existing amount), the net primary production amount, the required nutrient salt amount, the transpiration rate, etc. Next, a discussion was made on the increasing effect of the carbon fixation amount by changing the present ecosystem from the aspect of scale and rate. At the same time, a study was carried out of energy efficiency, economical efficiency and problems. Last, elementary technology was taken up which seems to be important for implementing measures for the biological carbon fixation. As to the ocean, it is necessary to obtain information, which is not sufficient to utilize marine biota for CO2 fixation, especially on the mechanism of depth-direction transfer of organism and its quantitative grasp. As to the land, one of the measures is conversion of the ecosystem where the amount of carbon fixed is small to the ecosystem where the amount is large. 249 refs., 58 figs., 51 tabs.

  17. Report on survey in fiscal 2000. Survey on introduction of external accreditation system in engineer education - iron and steel (Survey on education accreditation in material field); 2000 nendo chosa hokokusho. Gijutsusha kyoiku no gaibu ninteiseido donyu ni kansuru chosa (tekko) -Zairyo bunya ni okeru kyoiku nintei ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    In order to ensure international applicability of engineer education such as in universities and other organizations, and to improve the environment to supply human resources demanded by economic societies, a survey was performed on external accreditation systems for engineer education such as in universities and other organizations in the material field. In the survey, discussions were given on whether or not the education program accreditation system for the material field being structured has any problem in the actual operation of the accreditation through trials at Chiba Engineering University and Tokai University. As a result, it was revealed that the criteria are too general, requiring more detailed description on the guideline, and criteria should be so considered that assessment at higher levels can be given to the graduation research, which is a Japan's particular education system. In addition, it was made clear as a problem in the education programming side that a room for improvement remains in the education methods for the engineering ethics, communication skills, and the method for evaluating the students' achievements. In the survey on the methods for examination and accreditation in the U.S.A. it was found out that education organizations are perplexed with the new criteria of EC 2000. (NEDO)

  18. Development of hydroponic system using agricultural waste. 2. Utilization of ozone for sterilization of nutrient solution; Suiko saibai ni okeru haikibutsu riyo gijutsu no kaihatsu. 2. Ozone ni yoru baiyoeki sakkin ni kansuru kento

    Energy Technology Data Exchange (ETDEWEB)

    Terazoe, H; Yoshihara, T; Nakaya, K [Central Research Institute of Electric Power Industry, Tokyo (Japan)

    1995-08-01

    Discussions were given on a sterilizing effect of ozone on Fusarium bacteria in hydroponic culture, and its effect on components in the culture solution. In an experiment, dry air with O3 concentration of 3.5 ppm was sent into aqueous solution inoculated with Fusarium bacteria at a flow rate of 5 liters per minute. The Fusarium bacteria was sterilized nearly completely in about five minutes. No change was observed in pH, EC and dissolved oxygen concentration of the O3-treated culture solution. However, iron and manganese among the soluble components have been oxidized by O3 and precipitated, hence these components must be added after the O3 treatment. In spinach culture performed on a culture medium inoculated with Fusarium bacteria, ozone water containing dissolved O3 at 0.8 ppm was flown into a urethane foam medium and vegetable roots. This treatment has resulted in reduction of the number of strains occurred with a wilt symptom below that in the section flown with distilled water. The spinach has grown normally without showing an effect of the ozone water. 15 refs., 10 figs., 3 tabs.

  19. Numerical simulation of growth of flames formed in two-dimensional mixing layer. 2nd Report. Effect of dilution of fuel; Nijigen kongo sonai ni keiseisareta kaen no seicho ni kansuru suchi simulation. 2. Nenryo no kishaku ni yoru eikyo

    Energy Technology Data Exchange (ETDEWEB)

    Noda, S [Toyohashi University of Technology, Aichi (Japan); Hashimoto, K [Sumitomo Metal Industries, Ltd., Osaka (Japan); Nakajima, T [Kobe University, Kobe (Japan). Faculty of Engineering

    1994-07-25

    The effect of fuel dilution on growth of flames formed in 2-D mixing layers was studied by numerical simulation. The methane mass fraction of fuel was adjusted to 1.0, 0.3 and 0.2 through dilution by nitrogen, while the oxygen mass fraction of an oxidizer was fixed at 0.27. Flame structure was complicated due to the flows separated by flame at the leading edge of flames, and three peaks of the second Damkohler number were observed. Fuel dilution by nitrogen caused blow-off of flames, and the mixing ratio of the fuel and oxidizer at the leading edge of flames was essential to blow-off of diffused flames. In the case where vortices were observed in a flow field, the first Damkohler number was important which was determined by the hydrodynamic characteristic time of coherent vortices and the chemical characteristic time of flame propagation based on the mixing ratio of the fuel and oxidizer at the leading edge of flames. The diffused flames were elongated by shearing force, and an exothermic reaction was suppressed and a flame stabilization decreased with a decrease in second Damkohler number. 10 refs., 9 figs., 1 tab.

  20. Characteristic analysis of methane-gas generation by oxidizing heat of stored coal and hold ventilation control; Sekitan unpansen ni okeru sanka hatsunetsu ni yoru methane gas hassei to sonai kankyo seigyo ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Fukuchi, N; Nakashima, T [Kyushu Univ., Fukuoka (Japan); Kudo, S

    1999-12-31

    A demand of coal shows the tendency in the increase worldwide, with this, the marine transportation of the coal gradually increases, and the collier has also enlarged. The traffic pattern of coal is mainly the bulk transportation. In this transportation system, by the oxidation exothermic reaction of the coal, methane gas is produced, simultaneously the coal quality such as coking property or heat quantity is decreased and sometimes spontaneous ignition is caused. Therefore, it is necessary to equip with a ventilator to control the concentration of methane gas and to avoid the self heating of the coal. In this study, the quantity of methane-gas produced by heating coal using an electric furnace was measured and the experiment to investigate the temperature dependency of the methane-gas generated from the coal was conducted. By using the result of the measurement, the quantity of methane-gas produced from the coal stored in the hold of a coal cargo was estimated. And, the mathematical analyses on the changing degree depend on the times of a temperature in the hold under navigation, a concentration of oxygen and a concentration of methane-gas, were conducted. 11 refs., 19 figs., 2 tabs.

  1. Estimation of overprotection region on the painted steel plate under impressed-current cathodic protection. Gaibu dengenho ni yoru inkyoku boshoku ka no toso kohan ni okeru kaboshoku iki ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Iwata, M.; Huang, Y.; Fujimoto, Y. (Hiroshima Univ., hiroshima (Japan). Faculty of Engineering)

    1992-09-04

    Painting and cathodic protection are used in combination as a corrosion resisting measure for ship hull. n analytic method which uses the boundary element method for protection electric field by impressed-current method is proposed to show that rational determination is possible for the arrangement and current of the anode, and the arrangement and set voltage of the reference electrode used to control the current. However, repetitive calculation is necessary until overprotection voltage disappears from the surface of the painted steel plate while giving optional insulated area because the insulated area of adequate dimension is unknown. To decrease the number of this repetitive calculation, a study is made on a method of estimating the magnitude of the insulated area to be input as the initial value in the electric field analysis by the boundary element method. Although the insulated area has been empirically obtained, such formurization may be useful for automatic optimization using a computer of the location and number of anode, anode current, arrangement and set voltage of the reference electrode, magnitude of the insulated area, etc. in the impressed-current cathodic protection system. 2 refs., 10 figs., 1 tab.

  2. Few studies of the effect of diluents on extraction of cobalt with D2EHPA. D2EHPA ni yoru Co no chushutsu ni ataeru kishakuzai no eikyo ni kansuru jakkan no kento

    Energy Technology Data Exchange (ETDEWEB)

    Aranae, M.; Nakataka, Y.; Wakamatsu, T. (Kyoto Univ., Kyoto (Japan). Faculty of Engineering); Saito, I.; Sakamoto, H. (Environment Research Inst. Resources Technical Tsukuba (Japan))

    1991-12-27

    Study was made on extraction of cobalt from weak acid solution with di-(2-ethylhexyl) phosphoric acid (D2EHPA) using various polar diluents such as benzene, toluene, o-xylene, m-xylene, n-heptane, cyclohexane and n-hepatne-benzene mixtures. Extraction efficiency of cobalt has decreased in the order, n-heptane > cyclohexane > m-xylene > o-xylene > toluene > benzene and this order has been in good agreement with the decreasing order of solubility parameters of diluents,and has shown the possibility of application of regular solution theory. When n-heptane and cyclohexane as diluents, in low loading ratio(L),were used Co-D2EHPA polymer were formed compared to other diluents. On the other hand when mixture of n-heptane/benzene was used as diluent, the efficiency of extraction, salting-out effect and formation of Co-D2EHPA polymer has changed with the texture of mixture.This change may be due to the effect of L and it has been thought for the necessity of investigation of extraction of cobalt in low polar diluents. 13 refs., 5 figs., 2 tabs.

  3. Relationship between the electric resistivity and the rain fall in discontinuity zone of rock slope by the continuous measurement; Renzoku tokei ni yoru ganban shamen no furenzokutaibu ni okeru mikake hiteiko henka to kou tono kankei ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Kusumi, H; Nishida, K [Kansai University, Osaka (Japan). Faculty of Engineering; Nakamura, M [Newjec Inc., Osaka (Japan)

    1996-10-01

    The relationship between change in resistivity and rainfall was studied by continuously measuring resistivities of fracture zone and stratum boundary along the measuring line of 95m long from the top to bottom of rock slope. The measurement field was located on a hill of 150-200m high at the northern part of Arima-Takatsuki tectonic line. Electrodes of 30m in maximum measuring depth were arranged at 289 points by dipole-dipole method. Resistivity was continuously measured at time intervals of 6 hours. Apparent resistivity was hardly affected by rainfall at points with less infiltration of stormwater from the ground surface, while it decreased by rainfall at points on fracture zone, stratum boundary or bleeding channel. The change rate of apparent resistivity could be approximated with the exponential function of rainfall. In such case, the apparent resistivity under most dried condition at the concerned point should be used as reference maximum apparent resistivity. The change rate of apparent resistivity due to rainfall in fracture zone reflects infiltration of stormwater, suggesting to be useful for disaster prevention of slopes. 5 refs., 6 figs.

  4. Report on an investigation into heat pumps in China in fiscal 1995; 1995 nendo Chugoku ni okeru heat pump system ni kansuru chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    The paper surveyed the present status, the status of spread, and the technical development of the technology of heat pumps for residential and industrial uses in China. Main examples of installation of heat pumps are cited below: steam drive absorption type refrigerators in Beijing; sea water heat source turbo heat pumps in Qingdao; hot water drive absorption type refrigerators in Beijing; oil-fueled absorption type water cooling and heating appliances in Beijing; ice latent heat storage airconditioning systems using electrically-driven screw chiller in Beijing; temperature rising systems using electrically-driven heat pump of the solar energy utilization warm water swimming pool in Guangdong Province; cooling water supply using waste heat utilization absorption type refrigerator of the alcohol plant in Shandong Province; timber drying systems using electrically-driven heat pump, and marine product cultivation systems in Quangdong Province; distillation systems using steam turbine heat pump in Jiangxi Province. The demand for heat pumps is expected to be 20 million units under the 9th 5-year plan, and the development of equipment is thought to go toward promotion of energy conservation, low noise, multi-type or multi-functional air conditioning equipment, and computer use. 137 figs., 40 tabs.

  5. Fiscal 1999 survey report. Survey of leading countries' approaches to biomass energy development; 1999 nendo shuyokoku ni okeru biomass energy kaihatsu eno torikumi ni kansuru chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    The survey aims to help Japan deliberate its future biomass energy development strategy including the course Japan is to follow in its research and development of biomass energy by clarifying leading countries' approaches to the subject matter and trends of their research and development efforts in this connection. The states of biomass energy development in the U.S. and Europe are reported. In the U.S., President Clinton issued Executive Order 13134 on August 12, 1999, regarding bio-based products and bioenergy development. In this country, bioenergy and bio-based production technologies have developed to reach a stage where business pays, and commercial plants are in service. The U.S. Administration mentions as a strategy the efficient development of the bioenergy industry. In Europe, where resources are versatile and local, it is difficult to assess the economy of scale, and small-scale development efforts are being accumulated. Practical technologies under development mostly involve direct combustion. European measures are similar to U.S. measures in that such political goals as local development and employment promotion are firmly woven into them. (NEDO)

  6. Basic survey on the residence using hybrid energy in snowy cold regions; Sekisetsu kanreichi ni okeru hybrid energy katsuyogata jutaku nado ni kansuru kiso chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    The conceptual model and feasibility of the hybrid energy system for residences and public facilities in snowy cold regions were studied. Based on the existing data, the existing and available amounts of natural energy and unused energy in the target area, Sapporo were estimated. Based on the predicted energy demands of 4 kinds of building models, the energy systems for such models were studied. The use of the following energies was considered: photovoltaic power generation and solar heat for all the models, household sewage energy for the multiple-dwelling house model, and wind power generation for the public facility model. The annual energy balance was calculated to evaluate it. The use of additional commercial electricity was necessary, while surplus solar heat energy was found in summer which can push up the self-sufficiency rates of the residence and public facility models to 70% and 44%, respectively. The multiple- dwelling house model which can use a large amount of household sewage energy could utilize 80% of new energy, while the other 3 models utilized only 60-70% of that. 81 figs., 42 tabs.

  7. Study on recent research trends in the chemical fields; Kagaku bun`ya ni okeru saikin no kenkyu doko ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    This research is conducted to search study themes of chemistry expected towards the 21st century. The complex compound in the fundamental chemistry field and the bio-medical materials in the applied chemistry field are taken up. Bio-medical materials are used for the restoration, rehabilitation, and treatment of the organ and the improvement of its functions. For implants such as hearts, anti-thrombin and anti-calcium precipitation effects and high endurance are required. In this field, special copolymers and bio-membrane-emulating surfaces are studied. For artificial organs, hybrid type materials combining cells, and physiologically active and artificial materials are also studied. There are studies on the missile therapy of drugs and DDS (drug delivery system). The complex compounds contain metallic elements, such as Fe, Mn, Co and Cu, and groups known as ligands which combine these metal elements. They can have a variety of stereo-structures and physical properties. They also exhibit a diversity of functions including electron donor bonding, molecular recognition, chemical substitution, and pharmaceutical activity. These features open up a promising potential for their prospective use as physiologically active substances, cancerostats, new materials, artificial photosynthesis, memory elements, and complex catalysts. 88 refs., 35 figs., 6 tabs.

  8. Study on the impact assessment for the life cycle assessment (LCA); Kankyo fuka bunseki ni okeru impact assessment ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    This report describes the impact assessment which is an important step for LCA. For classification of the impact assessment, the existing literature was reviewed and a skeleton for the classification was proposed. The weighting factors for nine selected impact categories, which were used to calculate environmental load point (ELP) for the valuation, were obtained for two overseas groups, i.e., students of Amsterdam University and SETAC Europe members. It was found that the former provided the similar trends to general Japanese, however that the latter gave high weighting in the global warming and depletion of ozone layer. The ELP was proposed and applied to automatic washing machine, coffee maker, waste incineration power generation system, and co-generation system. As a result, its effectiveness was demonstrated. This report also describes problems for the LCA of thermal and material recycling of PS trays. 99 refs., 96 figs., 73 tabs.

  9. Questionnaire investigation for the earthquake in Honjo city and Yazawa city, Akita Prefecture; Jishin ni kansuru ishiki chosa (Akitaken Honjoshi oyobi Yuzawashi ni okeru anketo kara)

    Energy Technology Data Exchange (ETDEWEB)

    Nogoshi, M [Akita University, Akita (Japan). College of Education; Kabutoya, S

    1996-05-01

    Consciousness for the earthquake was investigated by questionnaire surveys made in Honjo City and Yuzawa City, Akita Pref. in October 1995 twelve years after the Nihonkai Chubu Earthquake (M=7.7) in May 1983. The survey was conducted in terms of 27 items including personality, memory, knowledge/interest, psychology/action, mental attitude/preparations, wishes for researchers and administration, etc. Also included were the items on the Great Hanshin-Awaji Earthquake and the earthquake blank areas. The number of distributed questionnaires and the recovery rate of them are 1500 and 79.2% in Honjo City, and 1700 and 84.7% in Yuzawa City. From the survey, it was found that people have a lot of knowledge of and high interest in the earthquake and well remember it, and a lot of people know of tsunami, liquefaction phenomena, and the earthquake blank area. Further, they are afraid of earthquakes and think of their actions to be taken in case of earthquake. However, most people are little prepared for earthquakes. Important future subjects were suggested for the study of disaster prevention measures. 13 figs.

  10. Survey on weather changes associated with large-scale tree-planting. 2; Daikibo ryokuka ni tomonau kiko henka ni kansuru chosa. 2

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    An investigational study was made for large-scale tree-planting aiming at CO2 fixation. Water resource and precipitation relating to tree-planting were determined from NASA data and arranged into the global distribution map. It was found that Australia and the Chinese continent are under the relatively favorable condition. As for the soil condition, nutrition resource is short in the desert and unused zone. From the vegetation data obtained from meteorological satellite NOAA, developed was a method for estimating net primary productivity of terrestrial ecosystem and obtained was a global distribution map for the amount of CO2 fixed under the present terrestrial vegetation. At the same time, areas which have great potentiality of tree-planting were selected from the map for estimating potentiality of the global tree-planting. To study the promotion of rainfall as a means of expanding the potential tree-planting area, the conventional meteorological and physical model was improved, and more realistic simulation was made possible. Also as to the water utilization technology, the modeling method was developed. As the area having a potentiality of expanding tree-planting, Australia (especially the west) was cited as the first candidate, and China the second candidate. 108 refs., 128 figs., 49 tabs.

  11. Investigations on an environment friendly chemical reaction process (eco-chemistry). 2; Kankyo ni yasashii kagaku hanno process (eko chemistry) ni kansuru chosa. 2

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    In order to structure a chemical reaction process that does not discharge a large amount of waste by-products or harmful chemical substances, or so-called environment friendly process, investigations and discussions were given based on the results derived in the previous fiscal year. A proposal was made to reduce environmental load on development of oxidized and dehydrogenated catalysts that can produce selectively ethylene, propylene and isobutylene in an oxidation process. In liquid phase oxidation, redox-based oxidation and solid catalyzation of automatic oxidation reaction were enumerated. In acid base catalyst reaction, development of ultra strong solid acid was described to structure no pollution discharging process. In the fine chemical and pharmaceutical fields, the optical active substance method and the position-selective aromatics displacement reaction were evaluated to reduce environmental load. A questionnaire survey performed on major chemical corporations inside and outside the country revealed the following processes as the ones that can cause hidden environmental problems: processes discharging large amount of wastes, processes treating dangerous materials, and processes consuming large amount of energy. Development of catalysts is important that can realize high yield, high selectivity and reactions under mild conditions as a future environment harmonizing chemical process. 117 refs., 23 figs., 22 tabs.

  12. Fiscal 1994 survey report. Survey of recent trends in CFC phaseout measures overseas; 1994 nendo shogaikoku ni okeru freon taisaku saishin doko ni kansuru chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-03-01

    Technical literature is referred to for the survey of recent trends in CFC (chlorofluorocarbon) phaseout in various countries overseas. The European Union will totally abolish CFC by the end of 1994 while other developed countries will totally abolish the same by the end of 1995 in compliance with the Montreal protocol. Many of the developing countries are actively striving to reduce CFC use with the help of the Multilateral Fund of Montreal. China and India have production facilities in themselves, and have not announced a phaseout program. There is a proposition for accelerating the regulation of HCFCs (hydrochlorofluorocarbons), but reliable substitutes for them are not yet available and their ozone layer restoring capability if used will be slight. It is feared that such will on the contrary retard CFC phaseout in developing countries. Accordingly, any abrupt acceleration of CFC phaseout implementation is inappropriate. Introduced in this report as fluorine-containing greenhouse gas-related information are a summary of the United Nations Framework Convention on Climate Change and the history of Intergovernmental Panel on Climate Change activities. According to an American survey, the aluminum industry emits 30,000 tons of CF{sub 4} and C{sub 2}F{sub 6}, and the semiconductor manufacturing industry 2,000-3,000 tons. As for SF{sub 6}, 5,000-8,000 tons are emitted mainly by the power industry. Measures for inhibiting them are being taken. (NEDO)

  13. Investigational study on the development, production and wide spread of welfare apparatus in north Europe; Hokuo ni okeru fukushi yogu no kaihatsu seisan fukyu ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    For the purpose of grasping the present situation of the development/production/spread of welfare apparatus in north Europe, an investigation was conducted paying visits to Sweden and Denmark. Basically in the Swedish policy for handicapped persons, disablement is defined not only as features which belong to each individual, but as problems arising when the environment surrounding each individual touches one another. Moreover, characteristics of their policies on welfare apparatus are that major welfare apparatus can be provided for the disabled free of charge, and that the government and public organs play a major role in each step of the development, evaluation, distribution and provision of welfare apparatus. Features of the market of welfare apparatus are that users and buyers of the apparatus are different persons, that a public corporation called SUB participates in determining selling prices, etc., and that the market reflects needs and requests from users comparatively naturally. The needs for welfare apparatus at the Research Institute of Handicapped Persons are grasped through opinion exchanges with groups of handicapped persons or information exchanges with the technical aid center. 3 refs., 11 figs., 10 tabs.

  14. Investigation into the analysis method of total ecobalance in chemical industry products. 3; Kagaku kogyo seihin ni okeru total eko balance no bunseki shuho ni kansuru chosa. 3

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    For the purpose of establishing a total life-cycle ecobalance analysis (LCA) method, the paper studied making of a general computer program for chemical industry products. The study has been made on general-purpose plastics (PET/PSP (polystyrene paper)) since fiscal 1993 aiming at making the CO2 emission computing program covering the entire process of production from extraction of raw materials through waste disposal. In fiscal 1995, the following were conducted for enhancement of generalization of the method: expansion of environmental load items and increase in validity of the concept, and expansion of database. Notice was taken of not only CO2 but SOx, NOx and water quality load items. The survey was made on the recycling situation in Japan and abroad and the PET recycling plant , and environmental load item data are collected to expand database. The program was verified by analyzing an example of reusing PET bottle to carpet, and one-step development can be made toward the establishment of the method. Moreover, an analysis was made for the environmental assessment of the related programs abroad, and a tentative original plan can be proposed for the standardization of environmental load analysis and the integrated assessment method. 39 refs., 130 figs., 76 tabs.

  15. Survey on a possibility of geothermal utilization in Tomakomai City; 1980 nendo Tomakomaishi ni okeru chinetsu riyo kanosei ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1980-11-01

    This paper describes a possibility of geothermal utilization in Tomakomai City. The Tomakomai area has an extremely great amount of hot water existing in deep layers, leading to a consideration that it is very highly possible to develop the hot water. As seen from the underground structure and ground temperature gradient in the Tomakomai sedimentary basin, the development depth would be considerably great, being assumed to be about 2,000 meters. The acquisition amount per well is estimated 100 m{sup 3}/hour or more at 65 degrees C. Rise in petroleum price in the future is an unavoidable fate, hence geothermal water utilization has a fully bright future. The water has relatively low temperature, and is effective for use in room heating, hot water supply, and agricultural and livestock industries. It is worth considering utilization as a local energy system. It has also large secondary effects. According to the latest trial calculation, the unit price for hot water for room heating and hot water supply would be 10 to 20 yen per 1,000 kilo-calories. If the same amount of hot water should be supplied from a boiler, fossil fuel of 20,470 kl/year would be required. If converted by using a kerosene price of 75 yen per liter, the cost would be 1.3 billion 35 million yen, comparatively higher than the geothermal water utilization. (NEDO)

  16. Investigational study of the CO2 balance in high temperature CO2 separation technology; Nisanka tanso koon bunri gijutsu ni okeru CO2 balance ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    An investigational study was conducted to clarify the adaptable environment and effectivity of technologies of high temperature separation/recovery/reutilization of CO2. In the study, data collection, arrangement and comparison were made of various separation technologies such as the membrane method, absorption method, adsorption method, and cryogenic separation method. With the LNG-fired power generation as an example, the adaptable environment and effectivity were made clear by making models by a process simulator, ASPEN PLUS. Moreover, using this simulator, effects of replacing the conventional steam reforming of hydrocarbon with the CO2 reforming were made clear with the methanol synthesis as an example. As to the rock fixation treatment of high temperature CO2, collection/arrangement were made of the data on the fixation treatment of the CO2 separated at high temperature into basic rocks such as peridotite and serpentinite in order to clarify the adaptable environment and effectivity of the treatment. Besides, a potentiality of the fixation to concrete waste was made clear. 57 refs., 57 figs., 93 tabs.

  17. Survey on the scrap iron and steel recycling in Thailand and Indonesia; Hatten tojokoku (Tai Indonesia) ni okeru tetsu scrap saiseiyo ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    This report describes the survey results of the scrap iron and steel recycling industries in Thailand and Indonesia. The purpose of this survey is to extract problems obstructing the scrap iron and steel recycling, to recognize the present situation and predict the future situation, and to examine the possibility of international cooperation. As a result of the survey, it was found that the quality of scrap collected in the domestic market is poor as it contains too many impurities for it to be utilized for the manufacture of many higher quality iron and steel products. The actual quantity of domestically collected scrap is too low to support the expected growth in demand in each nation. Current environmental management practices are largely concerned with the construction of wastewater treatment facilities and the extraction of furnace dust. However, the lack of enforcement of environmental regulations does not encourage companies to implement sound environmental practices. Neither government actively promotes and investigates iron and steel recycling in the domestic, commercial or industrial sectors. Collaboration with overseas nations having more advanced iron and steel industries could be helpful to the scrap recycling industry in both nations. 6 figs., 21 tabs.

  18. Survey of the trend of technical development and industrial policies in Asian countries; Asia shokoku ni okeru gijutsu kaihatsu no doko to sangyo gijutsu seisaku ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    A sharp rise in industrial productivity in Asia countries indicates a rising level of R and D technology. Since Japan has not clearly grasped the R and D ability in these countries, it has not given appropriate personnel/material R and D support to them. Therefore, for the purpose of exactly grasping the R and D ability of Asian countries (Korea, Taiwan, the Philippines, Indonesia and India) and studying an effective and appropriate method for R and D cooperation, a survey was conducted of R and D potentials in Asia and R and D support policies of the countries. As a result of the survey, the following are taken up as items to be considered: promotion of exchanges between Tsukuba, etc. in Japan and research/university towns and science parks being constructed in lots of countries, participation of private companies in high-tech joint work in cooperation with Japan, sending information from Japan using internet, etc. and exact grasp of needs at partner side, cooperation given to new comers without asking for research results (use of OB researchers, etc.) 25 refs., 39 figs., 59 tabs.

  19. Fiscal 1994 survey report. Survey of environmentally friendly chemical process (Ecochemistry); 1994 nendo kankyo ni yasashii kagaku hanno process (ecochemistry) ni kansuru chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-03-01

    Processes that contain latent environmental problems are the massive generation of wastes (inorganic salt, acid catalyst, base catalyst, and huge quantities of wastewater), handling of dangerous substances (use of hydrogen fluoride, use of phosgene, and use of substances whose discharge is legally controlled), processes which consume much energy (circulation of quantities of raw materials, use of quantities of solvents, separation of products with difficulties, use of high pressure, and multiple stage reaction), and processes which are expected to use resources now remaining unexploited. As an element technology for the solution of problems, there is the development of a solid redox catalyst for liquid phase oxidation. As compared with a liquid phase homogeneous catalyst, it discharges less inorganic wastes, facilitates the separation, recovery, and treatment of inorganic salts, corrodes structural materials less, and is thermally stable. An alkane partial oxidation catalyst when developed will achieve more energy conservation than an alkene oxidation catalyst. In relation to acid/base reaction, the zeolite catalyst will be improved and ultrastrong acids and ultrastrong bases will be developed, and these will reduce wastes, mitigate corrosion, and facilitate product separation. The development of a process is also expected which will avoid the use of toxic phosgene. (NEDO)

  20. Decay of 57Ni

    International Nuclear Information System (INIS)

    Santos Scardino, A.M. dos.

    1987-01-01

    The decay of 57 Ni to 57 Co was studied by gamma ray spectroscopy using both singles and coincidence spectra. The sources were obtained with the 58 Ni (Y,n) 57 Ni reaction. Natural metallic nickel was irradiated in the bremsstrahluhng beam of the linear accelerator of the Instituto de Fisica da Universidade de Sao Paulo with 30 MeV electrons. The singles espectra were taken with 104 cc HPGe detector and the coincidences espectra with 27 and 53cc Ge(Li) and 104 cc. HPGe detectors. The energies of transitions that follow the 57 Ni decay were measured using 56 Co as standard (which was obtained by (Y,np) reaction in 58 Ni) and taking into account the cascade cross-over relations. (author) [pt

  1. Natural convection heat transfer in an anisotropic porous cavity heated from the side. 2nd Report. experiment by hele-shaw cell; Tosuiritsu ni ihosei wo yusuru howa takoshitsu sonai no sokuho kanetsu ni yoru shizen tairyu netsu dentatsu. 2. Hele shaw cell ni yoru jikken

    Energy Technology Data Exchange (ETDEWEB)

    Kimura, S; Okajima, A; Kiwata, T [Kanazawa University, Ishikawa (Japan). Faculty of Engineering

    2000-11-25

    Natural convection heat transfer and flow structure in an anisotropic porous medium of square cavity saturated with Boussinesq fluid has been studied experimentally using a Hele-Shaw cell. The permeability ratio defined by K=K{sub y}/K{sub x} was put to three different values; 0.4, 1 and 2.5. The convection patterns at three different permeability ratios are visualized for several different Rayleigh numbers by the pH indicator method. When K is 0.25, the visualized flow is mainly in the vertical direction. On the contrary for K=4 the convecting flow is in the horizontal direction. The average heat transfer coefficients are also measured, and the corresponding Nusselt number are plotted as a function of K. It is found that the corresponding Nusselt numbers are scaled with (KRa){sup 1/2}. The experimental results of flow pattern and heat transfer are accord with those obtained by our previous theory. (author)

  2. Technology to prevent deposition of marine organisms by means of electrically conductive coating. Discussions on current and potential distribution by using experiments; Doden tomaku ni yoru kaiyo seibutsu fuchaku boshi gijutsu. Denryu den`i bunpu ni kansuru jikken ni yoru kento

    Energy Technology Data Exchange (ETDEWEB)

    Usami, M; Masaki, T [Mitsubishi Heavy Industries, Ltd., Tokyo (Japan); Ueda, K

    1996-04-10

    Steel structures in sea water and surface of hulls are deposited with such marine organisms as microorganisms, algae and shellfish. The deposition causes a large problem such as occurrence of abnormal local corrosion in the structures, and increase in cruising resistance in ocean vessels. The present study has introduced a simplified equation of estimation for current and potential distribution in parts coated with an electrically conductive film, and verified its reasonability by an experiment. The equation of estimation was introduced by following a model of current flow in the electrically conductive coating. The experiment has the conductive coating applied to the interior of a concrete water tank with a length of 10.8 m, a width of 5 m and a depth of 3 m to measure potential at different locations. The conductive coating was energized from copper foils attached on each applied face, whereas the current was applied to two faces between the conductive films as a pair among the four coating applied faces to measure potential in each location. A simulated calculation revealed that the potential range in the depth direction is made smaller if specific resistance of the conductive film is decreased, and made greater if increased. Effectiveness of the equation of estimation was verified by an experiment. This method has provided a prospect of achieving optimization of the specification for application of the conductive film. 2 refs., 7 figs.

  3. Technology for semi-endless use of lubricating oil, no waste oil, improvement of reliability and keeping high thermal efficiency in engines; Jinzo kino seijo gijutsu ni yoru engine oil no han`eikyu shiyo to haiyu zero, oyobi shinraisei kojo to netsukoritsu teika no boshi (joyosha ni yoru shiken oyobi truck ni okeru jitsuyoka)

    Energy Technology Data Exchange (ETDEWEB)

    Azuma, T [Teikyo University, Tokyo (Japan); Sumimoto, M; Kimura, I

    1997-10-01

    The authors have developed a new technology which enables it to use lubricating oil almost forever without any waste oil, only compensating lost oil and additives. The system has been working well in many marine and co-generation diesel engines. These engines have been also free from most of engine troubles. This paper reports the test results made on a car and some trucks. Besides above mentioned advantages, the results show that high thermal efficiency has been kept for more than ten years in the car tested and that the exhaust gas brake is much improved in the trucks. 8 refs., 4 figs.

  4. Bridging exchange bias effect in NiO and Ni(core)@NiO(shell) nanoparticles

    Energy Technology Data Exchange (ETDEWEB)

    Rinaldi-Montes, Natalia, E-mail: nataliarin@gmail.com [Departamento de Física, Universidad de Oviedo, E-33007 Oviedo (Spain); Gorria, Pedro [Departamento de Física & IUTA, EPI, Universidad de Oviedo, E-33203 Gijón (Spain); Martínez-Blanco, David [Servicios Científico-Técnicos, Universidad de Oviedo, E-33006 Oviedo (Spain); Fuertes, Antonio B. [Instituto Nacional del Carbón, CSIC, E-33080 Oviedo (Spain); Fernández Barquín, Luis [CITIMAC, Facultad de Ciencias, Universidad de Cantabria, E-39005 Santander (Spain); Puente-Orench, Inés [Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza and Institut Laue-Langevin, BP 156, F-38042 Grenoble Cedex 9 (France); Blanco, Jesús A. [Departamento de Física, Universidad de Oviedo, E-33007 Oviedo (Spain)

    2016-02-15

    Among all bi-magnetic core(transition metal)@shell(transition metal oxide) nanoparticles (NPs), Ni@NiO ones show an onset temperature for the exchange bias (EB) effect far below the Néel temperature of bulk antiferromagnetic NiO. In this framework, the role played by the magnetism of NiO at the nanoscale is investigated by comparing the microstructure and magnetic properties of NiO and Ni@NiO NPs. With the aim of bridging the two systems, the diameter of the NiO NPs (~4 nm) is chosen to be comparable to the shell thickness of Ni@NiO ones (~2 nm). The EB effect in Ni@NiO NPs is attributed to the exchange coupling between the core and the shell, with an interfacial exchange energy of ΔE~0.06 erg cm{sup −2}, thus comparable to previous reports on Ni/NiO interfaces both in thin film and NP morphologies. In contrast, the EB detected in NiO NPs is explained in a picture where uncompensated spins located on a magnetically disordered surface shell are exchange coupled to the antiferromagnetic core. In all the studied NPs, the variation of the EB field as a function of temperature is described according to a negative exponential law with a similar decay constant, yielding a vanishing EB effect around T~40–50 K. In addition, the onset temperature for the EB effect in both NiO and Ni@NiO NPs seems to follow a universal dependence with the NiO crystallite size. - Highlights: • Comparison of the exchange bias effect in NiO and Ni(core)@NiO(shell) nanoparticles. • Universal temperature dependence of the exchange bias effect. • Suggested similar physical origin of the effect in both systems. • Size and crystallinity of the NiO shell hold the key for exchange bias properties.

  5. Synthesis of calcium-deficient by hydroxyapatite-collage composite by the electrolytic deposition method; Denkai sekishutsu ho ni yoru karushiumu kesson hidorokishiapataito-coragen fukugotai no gosei

    Energy Technology Data Exchange (ETDEWEB)

    Okamura, H. [Niigata University, Niigata (Japan). Graduate School Of Science and Technology; Yasuda, M.; Oota, M. [Niigata University, Niigata (Japan)

    1997-07-05

    Hydroxyapatite is known as that it has a good joining property with teeth and bone, and a study on the application to the living body was conducted by using this property. Its application examples were given as the cement used in dentistry, the artificial tooth root, the artificial bone, the bone cement and the artificial joint. However, they were a sinter heated at more than 1000degC, and were put into use by means of reinforcement using a titanium alloy since their mechanical strength was low. In this study, synthesis of calcium-deficient hydroxyapatite (DAp) and collagen composite by the electrolytic deposition method was attempted in order to develop bionic materials, and the correlation of various physical properties of the obtained composite and the electrolytic deposition conditions were investigated. When the electrolytic voltage is more than 22.0V, a single phase of DAp could be obtained. It was clarified that a DAp and collagen composite was synthesized from results of IR and ESR. 16 refs., 5 figs.

  6. Fundamental principles of a new EM tool for in-situ resistivity measurement; Denji yudoho ni yoru den`ichi hiteiko sokutei sochi no kento

    Energy Technology Data Exchange (ETDEWEB)

    Noguchi, K; Aoki, H [Waseda University, Tokyo (Japan). School of Science and Engineering; Saito, A [Mitsui Mineral Development Engineering Co. Ltd., Tokyo (Japan)

    1996-05-01

    For the purpose of measuring in-situ resistivity without contact with the rock, a study was made about a measuring device using electromagnetic induction. This measuring device has two concentric transmission loops and a receiving point at the center of the loops, and performs focusing by canceling the primary magnetic field at the receiving point. Using this device, a trial was made to eliminate the influence of surface undulation. In the model calculation, response was calculated after the structure with a heavily undulated ground surface was replaced by a two-layer structure with the first layer provided with a higher resistivity. In the model, the first layer had a resistivity of 10000 Ohm m, and the second layer 1000 Ohm m. Using the ratio between the transmission loop radii as a parameter, relationship with the thickness of the first layer was studied, and it was found that the sensitivity to the second layer resistivity increases when the inner and outer loops are nearer to each other in terms of radius and that this eliminates the influence near the surface layer. A decision needs to fall within a scope assuring good reception because response intensity decreases as the ratio between the transmission loop radii approaches 1. 3 refs., 11 figs.

  7. Forward prediction of tunnel face by use of equi-traveltime planes; Tosojimen no riyo ni yoru tunnel kiriha zenpo tansa

    Energy Technology Data Exchange (ETDEWEB)

    Ashida, Y [Kyoto University, Kyoto (Japan). Faculty of Engineering; Hirano, T [Nishimatsu Construction Co. Ltd., Tokyo (Japan)

    1996-05-01

    The result is reported herein of a depth transform algorithm application utilizing equi-traveltime planes in reflection seismic exploration for the purpose of knowing the structure configuration in front of the tunnel face in a tunnel excavation process. A vibration producing hole was provided 0.5m above the ground surface while a vibration receiving hole was provided at 1.5m above the ground surface, and the excavated lengths were 1.5m and 0.5m, respectively. There were 24 recording channels, from which inline offset records were taken. The on-site records were subjected to 100-1000Hz band pass filtering. The elastic wave propagation rate in the rock used for depth conversion was set at 400m/s in consideration of the distance and direct wave travel time from the vibration source to the vibration receiving point. As the result of study, weak layers were found in the neighborhood of 230-240m, 260-270m, and 280-290m. This method requires less core memory for calculation and completes calculation in a shorter period of time, which enables a conclusion that it will be effective in grasping the 3-dimensional structure in front of the tunnel face in the working scene. 4 refs., 7 figs.

  8. Simulation on breakage of heterogeneous materials caused by detonative loading; Bakugo shogeki ni yoru fukinshitsu zairyo no hakai gensho no simulation

    Energy Technology Data Exchange (ETDEWEB)

    Sassa, K; Watanabe, T; Ashida, Y [Kyoto University, Kyoto (Japan). Faculty of Engineering

    1996-05-01

    Investigations were conducted by simulation of breakage of inhomogeneous materials (rock) attributable to detonative loading, which simulation used the Days-2 Code. During the simulation, one-free-face blastings were used for testing a homogeneous structure, horizontal 2-layer structure, and horizontal 3-layer structure. Property values were assigned to the rocks on the assumption that they were sedimentary rocks such as sandstone or mudstone or hard rocks such as granite. As the result, it was found that a detonative loading resulted in shear failure in a sphere near the focus that was followed by radially developed cracks due to tension breakage, that more area is damaged in a soft rock than in a hard rock, that cracks due to breakage are produced by the overlapping of waves directly from the focus and those reflected from the free face in case of one-free-face blastings, that such cracks propagated along the soft rock layer in case there is a soft rock layer in a hard rock, but that breakage does not extend beyond the soft rock layer. 6 refs., 6 figs., 1 tab.

  9. Estimation of subsurface-fracture orientation with the three-component crack-wave measurement; Kiretsuha sanjiku keisoku ni yoru chika kiretsumen no hoko suitei

    Energy Technology Data Exchange (ETDEWEB)

    Nagano, K; Sato, K [Muroran Institute of Technology, Hokkaido (Japan); Niitsuma, H [Tohoku University, Sendai (Japan)

    1996-05-01

    This paper reports experiments carried out to estimate subsurface-fracture orientation with the three-component crack-wave measurement. The experiments were performed by using existing subsurface cracks and two wells in the experimental field. An air gun as a sound source was installed directly above a subsurface crack intersection in one of the wells, and a three-component elastic wave detector was fixed in the vicinity of a subsurface crack intersection in the other well. Crack waves from the sound source were measured in a frequency bandwidth from 150 to 300 Hz. A coherence matrix was constituted relative to triaxial components of vibration in the crack waves; a coherent vector was sought that corresponds to a maximum coherent value of the matrix; and the direction of the longer axis in an ellipse (the direction being perpendicular to the crack face) was approximated in particle motions of the crack waves by using the vector. The normal line direction of the crack face estimated by using the above method was found to agree nearly well with the direction of the minimum crust compression stress measured in the normal line direction of the crack face existed in core samples collected from the wells, and measured at nearly the same position as the subsurface crack. 5 refs., 4 figs.

  10. Subsurface geology by shallow seismic reflection survey and microgravity survey in Kobe area; Senso hanshaho danseiha tansa oyobi seimitsu juryoku tansa ni yoru Kobe chiiki no chika chishitsu

    Energy Technology Data Exchange (ETDEWEB)

    Endo, H; Makino, M; Murata, Y; Watanabe, S [Geological Survey of Japan, Tsukuba (Japan)

    1996-05-01

    This paper reports discussions on subsurface structure of the Kobe area by means of microgravity survey. A Bouguer anomaly distribution graph was obtained (which is close to a near straight line) by measuring the gravity at measurement points with an interval of about 25 m along a traverse line (with a total length of about 1.7 km) in an approximately NNW-SSE direction crossing the downtown of the city of Kobe. Viewing the residuals to a straight line linking the values at both ends of the traverse line revealed that the gradient in the Bouguer anomaly distribution changes as if it is bent at a point near the center of the traverse line as a boundary. Deriving the residuals from fine changes seen in a distribution graph for the residuals made clear that this residual distribution has two discontinuous points. The paper indicates that the bending point in the former case corresponds to a reverse fault in a base bed of a flat land as compared with the result of model calculation on the base structure and gravity distribution. The discontinuous points in the latter case agree with positions of fault distribution derived by a reflection elastic wave survey. 6 refs., 4 figs.

  11. Development of the electromagnetic tomography system. Field test results using existing equipment; EM tomography system no kaihatsu. Kison sochi ni yoru test sokutei kekka

    Energy Technology Data Exchange (ETDEWEB)

    Kumekawa, Y; Miura, Y; Takasugi, S [Geothermal Energy Research and Development Co. Ltd., Tokyo (Japan); Arai, E [Metal Mining Agency of Japan, Tokyo (Japan)

    1996-05-01

    With the purpose of developing an electromagnetic tomography system, an observation was carried out with existing equipment combined, and the data was analyzed. The measuring equipment consisted of existing borehole vertical magnetic field sensors as the sensor part, MT method receivers as the receiving device, and existing CSMT method transmitters as the transmitting device. The measuring was performed at the Richmond Field Station which was abundant in existing data and which had a comparatively simple resistivity structure. The borehole vertical magnetic field sensors were lowered inside the borehole, and signal sources were arranged at 10m apart on the traverse line in the direction from northeast to southwest with the borehole as the center. The analysis of the data was made with the use of EM1D by three models, namely, 10 ohm{center_dot}m homogeneous earth model, 100 ohm{center_dot}m homogeneous earth model, and horizontal 7 layer model prepared on the basis of electric logging results; and a comparative examination was made against the measured data. As a result, it was demonstrated that the test measurement agreed very well with the model from the electric logging results and that it was the data reflecting a resistivity structure. 8 refs., 6 figs.

  12. Load leveling by a battery system in an electric power system with a photovoltaic system; Taiyoko hatsuden system ga donyusareta denryoku keito no chikudenchi ni yoru fuka heijunka

    Energy Technology Data Exchange (ETDEWEB)

    Kenmoku, Y.; Sakakibara, T. [Toyohashi University of Technology, Aichi (Japan); Nakagawa, S. [Maizuru College of Technology, Kyoto (Japan); Kawamoto, T. [Shizuoka University, Shizuoka (Japan)

    1997-11-25

    Storage battery-aided load leveling system is introduced into a power system having a photovoltaic power generation (PV) system, and the effect of the introduction is examined. For this purpose, the resultant improvement on the load factor and reduction in the annual cost are evaluated. Used as the load factor in the studies are the hourly records of power transmitted and received by Chubu Electric Power Co., Inc., in 1995. The output of the PV system is calculated using weather data collected in Nagoya City in the same year. Findings as the result of the studies are stated below. The maximum power is suppressed but a little if it is only the PV system that is introduced into the system. That is, a 2GW PV system introduced into the system suppresses the maximum power only by 0.5GW or less. The maximum power is suppressed more effectively when a storage battery is added, and it decreases linearly with an increase in the storage battery capacity. As for reduction in the cost, the reducing effect is higher when the rate of storage battery capacity/introduced PV capacity is higher in the presence of an introduced PV capacity of 0.8GW or more. 2 refs., 7 figs., 3 tabs.

  13. Economical effect of introducing a photovoltaic system on future electric power system; Shorai no denryoku keito eno taiyoko hatsuden system donyu ni yoru keizaiteki eikyo

    Energy Technology Data Exchange (ETDEWEB)

    Akata, N.; Kenmoku, Y.; Sakakibara, T. [Toyohashi University of Technology, Aichi (Japan); Kawamoto, T. [Shizuoka University, Shizuoka (Japan); Nakagawa, S. [Maizuru National College of Technology, Kyoto (Japan)

    1997-11-25

    Economic impact of introduction in the future of photovoltaic power generation (PV) systems into the commercial power system is discussed from the electric utilities` point of view. In the discussion, future demand for power is predicted from the demand for power in the base year, and the optimum power source configuration corresponding to the future demand and power generation curve are worked out by use of linear programming. Then, the fixed cost and variable cost are calculated for each of the power source components, and then the expected reduction in cost per unit of power generated is calculated. As the power sources, the hydroelectric, pumped storage, oil-fired, coal-fired, LNG-fired, combined cycle, and atomic technologies are considered. The conclusion is stated below. Upon introduction of PV power equivalent to 10% of the maximum demand power, the maximum power in the service area of Chubu Electric Power Co., Inc., will be reduced by 1.23GW in 2025, and the yearly demand power by 5472GWh. Since PV lowers the peak, an increased number of power sources low in variable cost will be used although such will be low in tracking capability. An increase in power demand will enhance the cost reducing effect of the PV system. 5 refs., 4 figs., 3 tabs.

  14. Photogrammetric measurement of two-dimensional small-amplitude waves; Hakuso suiryu no nijigen bisho shinpukuha no shashin sokuryoho ni yoru sokutei

    Energy Technology Data Exchange (ETDEWEB)

    Yoshino, F. [Tottori University, Tottori (Japan). Faculty of Engineering; Urata, K. [Hitachi Zosen Corp., Osaka (Japan); Kishi, H.

    1996-01-25

    A photogrammetric measurement method for two-dimensional small-amplitude waves were proposed where a diffuse reflection spot is used as an index point. An equation used to obtain the still water depth was introduced. This equation was confirmed experimentally by using a laser displacement sensor which is equivalent to a camera-index-point system in principle. To confirm the applicability of this method to waves form measurement, numerical simulations of measurement by this method were carried out for sinusoidal waves and a composed wave. The results of these simulations show that the small-amplitude waves can be measured with sufficient accuracy when the water surface inclination is small. 4 refs., 14 figs., 1 tab.

  15. Three component particle velocimetry using laser sheets for cycle-resolved, in-cylinder measurements; Laser sheet ho ni yoru cylinder nai nagare no sanjigen sokutei

    Energy Technology Data Exchange (ETDEWEB)

    Ishii, K.; Urata, Y.; Yoshida, K.; Ono, T. [Honda Motor Co. Ltd., Tokyo (Japan)

    1996-01-25

    Analysis of the cycle-by-cycle variation of combustion in an internal combustion engine can be aided by the cycle-resolved measurement of the in-cylinder gas velocity. This paper describes the principle and operation of, and results obtained from, a particle coded-pulse velocimeter (PCPV) which measured the three components of velocity within normal planes to the axis of cylinder. The PCPV was applied to a 1.5 litre lean-burn engine in order to record the flow pattern. The intake air was seeded with light microcapsules of approximately 50{mu}m diameter which scattered light from a system of up to two sets of three plane laser sheets, distinguished by colour and thickness and pulsed by acousto-optic modulators, illuminating planes in the bore of the engine. The magnitudes of the axial and cross bore components of the velocity vector were found from the measured lengths and the duration of the particle tracks. The results from the PCPV measurements are time-resolved and instantaneously three-dimensional and thus the PCPV is capable of identifying the transition from a disordered flow, such as the intake process, to well-ordered flows such as occur during a compression process. The derived swirl and tumble ratios were relatively in good agreement with those measured by an impulse swirl meter. 6 refs., 8 figs., 1 tabs.

  16. Ion exclusion chromatography for the purification of L-glutamine; Ion haijo chromatography ni yoru L-glutamine no seiseiho no kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Ito, H.; Nishi, A.; Naruse, M. [Ajinomoto Co. Inc., Kawasaki (Japan)

    1998-09-05

    Ion exclusion chromatography for the purification of L-glutamine is studied. L-glutamine is usually produced by fermentation and used in pharmaceuticals. By using a model solution of L-glutamine and L-glutamic acid, the optimum cation exchange resin is examined. As a result of the experiments, it is found that a cation exchange resin which has smaller crosslinkage and smaller diameter is better. Ammonium sulfate, L-glutamic acid and pyrrolidonecarboxylic acid, which are usually contained in fermentation broth as impurities, are effectively separated by this method. Moreover, the experimental data of the chromatography is expressed fairly well by the differential equations which express the mass transfer in the fixed bed. 8 refs., 5 figs., 2 tabs.

  17. On-line temperature control of fluidized bed incinerator using fuzzy algorithm; Fuzzu seigyo donyu ni yoru ryudosogata shokyakuro unten no jidoka

    Energy Technology Data Exchange (ETDEWEB)

    Okayasu, S.; Kuratani, T.; Imai, H. [Ajinomoto Co. Inc., Tokyo (Japan)

    1995-03-15

    Automatic control of incinerators for their stable operation has been desired for the preservation of the environment in the factory. An on-line fuzzy control system has been successfully introduced for temperature control of the fluidized bed of incinerator for industrial wastes. In this case, manual control can be applied to the plant instead of a PID control system, because of the complexity of the waste materials and the large delay in detection of the temperature change in the fluidized bed sand. On the basis of analyzing the dynamic performance of the process and the know-how of skilled operators, membership functions and fuzzy control rules are selected, then determined carefully for the system. Introduction of the system resulted in almost the same performance as manual control. Subsequently the operators are freed from manual operation in the control room for an hour. 6 refs., 5 figs., 4 tabs.

  18. Aerodynamic characteristics of a wing near its tip using panel method. Panel ho ni yoru tandokuyoku yokutan fukin no kuryoku tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Choi, J [Nagoya University, Nagoya (Japan); Sugiyama, Y [Nagoya University, Nagoya (Japan). Faculty of Engineering

    1992-01-05

    The study described in this paper is intended to evaluate the aerodynamic characteristics of a turbo machine wing or an aircraft wing near its tip, using the panel method. The paper describes the case of a rectangular wing with a large aspect ratio. The introduced linear simultaneous equation was solved using a computer, and compared with the experimental result. The result may be summarized as follows: The distribution of pressure on the wing near its tip using the panel method takes the same shape as that for the experimental result; the negative pressure calculated close to the wing's trailing edge near the wing tip is a result of a three-dimensional effect of the flow along the wing width; the calculation and the experiment showed an increase in local lift coefficient and locally induced resistance coefficient in the vicinity of wing tip; the speed component in the y'' direction explains the structure of the wing surface velocity forming wing backwash vortex given by the lift linearity theory; and the result of calculation on the pressure distribution in the wing chord direction near the wing tip is very close to the experimental result except for the wing flank in the close vicinity of the wing tip upstream of the wing chord middle point. 11 refs., 13 figs.

  19. Estimation for origin of coals on biomaker analysis; Jinko sekitan oyobi tennen sekitan no biomaker bunseki ni yoru sekitan kigen busshitsu no suitei

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, Y. [Geological Survey of Japan, Tsukuba (Japan); Sugimoto, Y. [National Institute of Materials and Chemical Research, Tsukuba (Japan); Okada, K. [Coal Mining Research Center, Tokyo (Japan)

    1996-10-28

    In order to study coal production processes, an estimation study was carried out on coal originating materials by using biomaker analysis. Test samples are original coals collected directly from a mine in Hokkaido (not having been subjected cleaning). Mixing and solvent extraction were performed after pulverization, and then tests were given on saturated hydrocarbon components divided by using a silicagel column chromatograph for the present study. It can be known from n-alkane distribution in the coal that low molecular alkane increases with increasing degree of coalification. Artificial coal made by wet-heating Metasequoia leaves contains only little n-alkane. Diterpenoid compound exists in the Taiheiyo and Akabira coals. Tetra-cyclic diterpernoid is contained abundantly in subtropical coniferous trees, serving as a parameter for warm environment. The compound is contained also in the Fushun coal, but not in Indonesian coals. Hopanoid constitution shows very high similarity, but H/C atomic ratio may vary largely even if the coalification is at the same degree. This is likely to be caused from difference in originating materials. Hopanoids are bacteria attributed substances, whose activities are not affected by the originating materials. 2 figs., 1 tab.

  20. Explosive treatment of Illinois No.6 coal with a mixed solvent of water and cyclohexanol; Mizu-cyclohexanol kongo yozai ni yoru Illinois tan no bakusai shori

    Energy Technology Data Exchange (ETDEWEB)

    Hashimoto, T.; Takada, H.; Asami, K.; Yano, M. [Osaka City University, Osaka (Japan). Faculty of Engineering

    1996-10-28

    Coal was treated at high temperature under high pressure in the binary system mixed solvent of water and organic solvent, and the solvent treated coal was liquefied. When the treated coal was treated again by the explosive method in which high temperature and pressure were released immediately, the oil yield was higher than that by the normal method in which high temperature and pressure were reduced gradually to room temperature and atmospheric pressure. In this study, an explosive treatment unit with increased scale of sample amount was newly fabricated. Illinois No.6 coal was treated by the explosive method in a mixed solvent of water and cyclohexanol using this unit. Changes in shape on the surface, specific surface area, and functional groups were analyzed. The explosively treated coal contained more amount of low boiling point components than the normally treated coal. It was suggested that the oil yield of explosively treated coal increased due to the liquefaction of these components during the successive hydrogenation process. For the explosively treated coal, micro pores were fractured by the rapid change in the volume of solvent molecules, and the specific surface area was smaller than that of the normally treated coal. When the treatment temperature was increased from 300{degree}C to 350{degree}C, specific surface areas of both the treated coals increased. 2 refs., 3 figs., 2 tabs.

  1. Characterization of interactions of coal surface with solvent by flow microcalorimetric measurement. 3; Netsuryo sokutei ni yoru sekitan hyomen to yozai tono sogo sayo no hyoka. 3

    Energy Technology Data Exchange (ETDEWEB)

    Wang, N.; Sasaki, M.; Yoshida, T. [Hokkaido National Industrial Research Institute, Sapporo (Japan); Kotanigawa, T. [Japan International Corporation Agency, Tokyo (Japan)

    1996-10-28

    An investigation was given on the relationship between methanol adsorbing behavior of reformed coal surface and oxygen containing functional groups in coal. Akabira bituminous coal was air-oxidized or Yallourn brown coal was decarbonated in oil as a reformation treatment. Both of the treated and untreated coals showed an adsorption heat curve of the Langmuir type. The Akabira coal had its oxygen content and the adsorption heat increased as a result of the air oxidizing reformation treatment. The Yallourn coal had its oxygen content and adsorption heat decreased as a result decarbonation reformation treatment. Oxygen containing functional groups act as strong adsorption sites for methanol, and the maximum adsorption amount depends on oxygen content in the coals. Since the coal surface is non-uniform in terms of energy, methanol is adsorbed first into sites with higher molar adsorption heat, and then into lower sites sequentially. Therefore, distribution of the molar adsorption heat can be derived from the relationship between adsorption amount and adsorption heat by changing methanol adsorption amount. The distribution of molar adsorption heat becomes broader when the oxygen content is high, and narrower when low. 2 refs., 2 figs.

  2. Depolymerization of coal by O2 oxidation followed by acid hydrolysis; Sanso sanka-kasui bunkai ni yoru sekitan no teionkai jugo

    Energy Technology Data Exchange (ETDEWEB)

    Aizawa, S.; Hayashi, J.; Kumagai, H.; Chiba, T. [Hokkaido University, Sapporo (Japan). Center for Advanced Research of Energy Technology; Morooka, S. [Kyushu University, Fukuoka (Japan). Faculty of Engineering

    1996-10-28

    With an objective to elucidate characteristics of oxygen addition to coal, and characteristics of solvent extraction by means of depolymerization, experiments were performed on oxygen oxidation and acid hydrolysis of brown coals. Coals used for the experiments are Morwell (MW), Yallourn (YL) , South Banko (SB) and Wyoming (WY) coals. Test samples were suspended in weak alkaline aqueous solution, and then oxygen was blown into them with pressure kept at atmospheric pressure. After a lapse of a predetermined time, the samples were cooled, and made as acidic as pH 1.3 in hydrochloric acid, followed by acid hydrolysis. Oxygen consumption increased with the reaction time, and with the MW coal, one mol oxygen reacted to 11 mols of coal. Spectral analysis on the YL and WY coal experiments revealed that aliphatic carbon combined with aromatic carbon or ether group has turned to peroxide, whose C-C or C-O bond was broken down as a result of acid hydrolysis of the peroxide, producing oxygen containing compounds. As a result of the depolymerization, the rate of extraction by using DMF, DMSO and methanol/THF mixed solvent increased to 90% or higher. Proportion of bond and cutting-off affects largely collapse of the cross-link structure. The carbon conversion to volatiles was at most 4%. 1 ref., 10 figs.

  3. ESR study on the interaction between carbon blacks and oxygen molecules; ESR ho ni yoru carbon black to sanso bunshi tono sogo sayo no kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Okazaki, M.; Toriyama, K.; Konishi, Y. [National Industrial Research Institute of Nagoya, Nagoya (Japan)

    2000-02-24

    Interaction between carbon blacks and oxygen molecules has been studied by means of electron spin resonance (ESR) spectroscopy. The ESR spectra of the carbon blacks appears at the g-value of free spin, which are contributed by both isolated electrons and conduction electrons. Upon introducing oxygen to the system the ESR linewidth was broadened in proportion to the partial pressure of oxygen. In case of lampblack (LB 101, Degussa) the interaction was not so strong that it took a tong time at 77K for the linewidth to reach the maxmum value. In case of gassblack (P 140 V, Degussa), on the other hand, the oxygen was easily adsorbed at 298K and the linewidth at 77K became its maximum immediately after cooling. The number of unpaired electrons decreased when the system was kept at 298 K and the decrease was prominent for the local spins. These phenomena have been explained with a simple band model for the electron. (author)

  4. Preparation of tazheranite powders by solid phase reaction and conductivity of sintered bodies. Kosoho ni yoru tazheranite no funmatsu gosei to dodensei

    Energy Technology Data Exchange (ETDEWEB)

    Kuramochi, H; Kobayashi, H; Mitamura, T [Saitama University, Saitama (Japan). Faculty of Enginering; Mori, T; Yamamura, H [Tosoh Co., Tokyo (Japan)

    1992-09-01

    Single phase powder of Ca0.2Zr(0.8-x)TixOy was synthesized by replacing a part of ZrO2 in tazheranite which belongs to cubic crystal mineral of 3 constituents of CaO/ZrO2/ TiO2 with TiO2 to study the conductivity. Predetermined powder amounts of CaCO3, ZrO2 and TiO2 were respectively weighed and mixed with wet condition, the carbonate was decomposed at 1,000 centigrade, and after mixed again with wet condition, the mixture was dried and calcined again at 1,200 to 1,300 centigrade for 2 to 20 hours to get the powder. This powder was crushed and classified to make molded items by uniaxial pressing and the items were fired at 1,400 to 1,600 centigrade for 1 to 10 hours. The conductivity of sintered bodies was measured by the complex impedance method. The following results could be obtained: The targeted powder could be synthesized at the composition range of x=0.04 to 0.10 and the apparent x of single phase area was widened to 0.15 at the firing temperature of 1,500 centigrade. The activation energies of the conductivity of sintered items were 120 to 130kJ/mol, indicating that the electric conductivity was dominated by the ion conduction and was not affected by TiO2 amount, and the formed phase. The grain resistance increased and the grain boundary resistance decreased with the increase of TiO2 amount. 17 refs., 9 figs.

  5. Surface wettability control by titanium dioxide photo-induced reaction. Super-hydrophilic properties; Sanka chitan ni yoru hikari reiki shinsuika gijutsu. Hikari shokubai chosinsuisei

    Energy Technology Data Exchange (ETDEWEB)

    Watanabe, T. [The University of Tokyo, Tokyo (Japan). Research Center for Advanced Science and Technology

    1999-05-01

    Hydrophilicity results when the surface of titanium dioxide is reduced for the specified oxygen to be replaced by hydroxyl groups. The ease with which such a structural change occurs is subject to variation between titanium dioxide crystal surfaces, and is dependent greatly on the atmosphere. No hydrophilic trend is observed in an atmosphere of oxygen only without moisture and, in darkness without light, hydrophobicity occurs early. Although the contacta angle titanium dioxide with water with stability is not known, yet it is presumed, on the analogy of the case of strontium titanate, that it is in the range of 20-40 degrees. A hydrophilic trend below the range is attrributed to structural changes. The control of surface wettability is one of the basic tasks to fulfill in various kinds of mechanisms and manufacturing processes. The technology of wettability control using a titanium dioxide coating which is quite durable will be applied not only to functions involving defogging, dripproof, and self-cleaning, but also to the control of heat transmission in the mechanism and to the bonding process. (NEDO)

  6. Numerical simulation of an excited round jet under helical disturbances by three-dimensional discrete vortex method; Helical kakuran ni yoru reiki enkei funryu no uzuho simulation

    Energy Technology Data Exchange (ETDEWEB)

    Izawa, S.; Kiya, M.; Mochizuki, O. [Hokkaido University, Sapporo (Japan)

    1998-09-25

    The evolution of vortical structure in an impulsively started round jet has been studied numerically by means of a three-dimensional vortex blob method. The viscous diffusion of vorticity is approximated by a core spreading model originally proposed by Leonard (1980). The jet is forced by axisymmetric, helical and multiple disturbances. The multiple disturbances are combinations of two helical disturbances of the same mode rotating in the opposite directions. The multiple disturbances are found to enhance both the generation of small-scale structures and the growth rate of the jet. The small-scale structures have highly organized spatial distributions. The core spreading method is effective in aquiring the core overlapping in regions of high extensional rate of strain. 21 refs., 12 figs.

  7. Control of population of excited nitrogen molecules by mixing hydrogen in low pressure discharge; Chisso jun`antei reiki bunshi mitsudo no quenching ni yoru seigyo no kento

    Energy Technology Data Exchange (ETDEWEB)

    Uematsu, K.; Yumoto, M.; Sakai, T. [Musashi Institute of Technology, Tokyo (Japan)

    1998-06-01

    The authors have studied on surface treatment of PTFE by a low pressure discharge. It is deduced that excited nitrogen molecules contribute to introduce polar components on the surface. To confirm the speculation, we tried to change population of metastable nitrogen N2 (A{sup 3}{Sigma}u{sup +}) by quenching precursor N2 (B{sup 3}{pi}g), with hydrogen molecule. The decrease of relaxation time which indicates a change of excited molecule and measured by emission spectroscopy using a time after glow method was obtained. As a result, the relaxation times of N2 (B{sup 3}{pi}g) and N2 (A{sup 3}{Sigma}u{sup +}) decreased to 55% and 20% respectively, when mixing ratio of hydrogen was 3%. It was also deduced that hydrogen atom may take a part in a quenching process of N2 (A{sup 3}{Sigma}u{sup +}). 14 refs., 11 figs., 1 tab.

  8. Surface wettability control by titanium dioxide photo-induced reaction. Super-hydrophilic properties. Sanka chitan ni yoru hikari reiki shinsuika gijutsu. Hikari shokubai chosinsuisei

    Energy Technology Data Exchange (ETDEWEB)

    Watanabe, T. (The University of Tokyo, Tokyo (Japan). Research Center for Advanced Science and Technology)

    1999-05-01

    Hydrophilicity results when the surface of titanium dioxide is reduced for the specified oxygen to be replaced by hydroxyl groups. The ease with which such a structural change occurs is subject to variation between titanium dioxide crystal surfaces, and is dependent greatly on the atmosphere. No hydrophilic trend is observed in an atmosphere of oxygen only without moisture and, in darkness without light, hydrophobicity occurs early. Although the contacta angle titanium dioxide with water with stability is not known, yet it is presumed, on the analogy of the case of strontium titanate, that it is in the range of 20-40 degrees. A hydrophilic trend below the range is attrributed to structural changes. The control of surface wettability is one of the basic tasks to fulfill in various kinds of mechanisms and manufacturing processes. The technology of wettability control using a titanium dioxide coating which is quite durable will be applied not only to functions involving defogging, dripproof, and self-cleaning, but also to the control of heat transmission in the mechanism and to the bonding process. (NEDO)

  9. Analysis of combustion in an ATAC engine with measurement of radical luminescence; Radical hakko keisoku ni yoru ATAC engine no nensho kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Park, Y; Oguma, H; Ueda, H; Iida, N [Keio University, Tokyo (Japan)

    1997-10-01

    In order to make clear of the combustion mechanism and the frame structure in two stake, so called, active thermo-atmosphere combustion (ATAC) engine fueled by gasoline and methanol, we measured the 2-demensional images of OH, CH and C2 radical band spectra in both ATAC and SI combustion mode. From the results of pressure data in the cylinder, the heat release rate was calculated. We evaluated the correlation of radical luminescence intensity and the rate of heat release. 3 refs., 4 figs., 2 tabs.

  10. Quantitative measurements of air-fuel mixture distribution in a cylinder using LIF; LIF ni yoru tonai kongoki nodo no teiryoteki keisoku

    Energy Technology Data Exchange (ETDEWEB)

    Kato, S; Kadoi, N [Subaru Research Center, Tokyo (Japan)

    1997-10-01

    It is necessary to understand the mechanisms of mixture formation in a cylinder to improve engine performance, especially for a gasoline direct injection engine. In this study, a quantitative air-fuel mixture measurement technique using PLIF was developed. Across a laser sheet, a transparent liner was placed between two calibration cells which increased the reliability of fuel concentration. This technique was applied to gasoline direct injection engine to clarify the effect of injection timing on stratified charged mixture. 4 refs., 6 figs., 3 tabs.

  11. Basic study on mass transportation systems in buildings by means of multiple-cage elevators; Junkangata erebeta ni yoru biru nai tairyo yuso sisutemu no kiso kento

    Energy Technology Data Exchange (ETDEWEB)

    Fujino, A.; Tobita, T. [Hitachi, Ltd., Tokyo (Japan); Nakagawa, K. [Shimizu Corporation, Tokyo (Japan)

    1997-06-20

    From the viewpoints of realization of mass transportation, improvement of space factor in buildings, transportation systems in buildings are surveyed to compare the characteristics. Then, a loop-type independently-driven multiple-cage elevator (circulating elevator) system is proposed to estimate its transportation capacity, and necessary data for realizing transportation capacity higher than twice that of the conventional elevator are presented. As regards operational control, a high efficient control method is proposed which can restrain needless stops particular to the multiple-cage system and improve the waiting time and round trip time, and the result of the investigation by simulation is reported. Basic operation method of the loop-type elevator is determined, and the transportation capacity is estimated by simulation. The application in which the loop-type elevator can exhibit the best performance is its use in 15 floor-class buildings or for local bank zones in large-scale buildings in a system combined with the shuttle system. 9 refs., 12 figs., 5 tabs.

  12. Insulation diagnosis of rotating machines for elevators by an expert system based on fuzzy inference. Fuzzy suiron wo donyushita expert system ni yoru shokokiyo kaitenki no zetsuen shindan

    Energy Technology Data Exchange (ETDEWEB)

    Kaneko, K.; Oshima, H. (Tokai Univ., Tokyo (Japan)); Yamada, N.; Iijima, T. (Mitsubishi Electric Building Techno-Service Co. Ltd., Tokyo (Japan))

    1992-11-20

    Using the data measured with the insulation deterioration diagnostic system for rotating machines for elevators, which is newly developed utilizing the past experience, an expert system which enables insulation deterioration diagnosis even by field maintenance engineers to some extent. In this system, the knowledge and experience of specialists are loaded in a personal computer as the rule for insulation deterioration diagnosis to perform insulation deterioration diagnosis by fuzzy inference and 'hypothesis-verification' type backward reasoning inference. The structured expert system is outlined. The result of insulation diagnosis by this system s compared with that made by specialists to evaluate the effectiveness of the diagnosed result of this system, and shows 84% agreement with the results obtained by specialists. It is, therefore, considered to be a highly practical expert system. 10 refs., 7 figs., 1 tab.

  13. Reinforcing method for reinforced concrete structures by using carbon fibers; Tanso sen`i ni yoru tekkin concrete kozobutsu no hokyo koho

    Energy Technology Data Exchange (ETDEWEB)

    Tanaka, T.; Taniki, K. [Mitsubishi Kasei Corp., Tokyo (Japan); Kojima, N.; Kimura, K.; Katsumata, H. [Obayashi Corp., Osaka (Japan)

    1994-08-15

    This paper describes the development of a reinforcing method for reinforced concrete (hereinafter RC) structures by using carbon fibers (hereinafter CF). This developed method attaches a light-weight CFUD prepreg material for reinforcement by laterally winding CF strand impregnated with epoxy resin, which is hardened under normal temperature. This method is economical because no skills and special tools are required. An RC pillar with circular cross section and a hollow RC test body assuming a chimney were used as models. The paper details the experiment. This method has been used in several ten existing RC stacks with effective reinforcing result. Resistance strengths of CF strands and UD prepregs were verified in an accelerated exposure test performed according to JIS A 1415, standard for plastic building materials. The effects of the anti-seismic reinforcement have resulted in improvement in shear resistance force in RC pillars by means of CF winding method, improvement in bending stress in RC structures as a result of CF attaching method, and effectiveness in repair of existing RC stacks. Sufficient exposure resistance has also been proved. A bending test by means of two-point concentrated loading has been performed as a weighted test. 4 figs.

  14. Corrosion prevention of the rail by thermal spray coating of Zn-Al alloy; Zn-Al gokin yosha hifuku ni yoru reru no boshoku

    Energy Technology Data Exchange (ETDEWEB)

    Mizoguchi, S. [Nippon Steel Corp., Kitakyushu (Japan)] Urashima, C. [Kyushu Techno Research Corp., Fukuoka (Japan); Itai, K. [Nippon Steel Corp., Kitakyushu, Fukuoka (Japan). Technical Research Inst. of Yawata Works; Ichiriki, T.; Nishiki, M. [Kyushu Rail way comdany, Fukuoka (Japan)

    1997-03-30

    Replacement of the rail in under-sea tunnel such as the Kammon Tunnel is carried out very five years because of the severe corrosion caused by the humid state due to the leakage of sea water or the mist of sea water swept up by the passing trains. In this study, salt water spraying or sea water spraying test is carried out using Zn-Al alloy with the corrosion resistance and thermal spray efficiency even higher than those of Zn or Al. A rail coated by thermal spray of Zn-15mass%Al alloy has been laid by trial in the practical rail road of Kammon Tunnel for 5 years and 3 months, the deterioration degree of the coating, pitting depth, actual fatigue strength, etc. are evaluated. Further, these factors of a rail re-coated by Zincrich Primer+Tar Epoxy and a bare rail laid at the same time are evaluated for comparison. It is presumed by the results of the examination about the service life of a rail coated by the thermal spray of Zn-Al alloy based on the pitting depth in the rail base that the service life of such coated rail is more than twice as that of the bare rails used currently. 5 refs., 14 figs., 3 tabs.

  15. Finite-volume simulation of the flow around a sailing boat with unsteady motion; Hiteijo undo wo okonau hansotei no yuten taisekiho ni yoru simulation

    Energy Technology Data Exchange (ETDEWEB)

    Akimoto, H. [Tottori University, Tottori (Japan). Faculty of Engineering

    1997-06-01

    A new simulation code WISDAM-7 is developed to simulate performance of a sailing boat moving three-dimensionally on a free surface. It adequately predicts forces acting on each element, such as hull, sail, keel and rudder, and use them as the inputs to solve equations of hull motion of 6 freedoms. Its major features are the grid system fit for both free and hull surfaces, generation of discrete space by the finite-volume method, handling of the velocity vectors directly as those in the Descartes system, velocity and pressure placed at the cell center, use of the moving grid system for free and object surfaces, and use of equations of hull motion of 6 freedoms. It is confirmed by comparing simulated motion of an IACC class yacht with the observed surface pressure distributions in the test tank that the new method satisfies the basic requirements for simulation of sailing boat motion and expands the applicable range of CFD to general motion conditions. 8 refs., 18 figs.

  16. Method for solving an inverse problem of wing type by using a simple panel method; Kanbenna panel ho ni yoru yokugata gyaku mondai no ichikaiho

    Energy Technology Data Exchange (ETDEWEB)

    Ando, J; Matsumoto, D; Maita, S; Nakatake, K [Kyushu University, Fukuoka (Japan). Faculty of Engineering

    1997-10-01

    This paper describes one method for solving an inverse problem of wing type based on the source and quasi continuous vortex lattice method (SQCM) in designing marine propellers and underwater wings. With the SQCM, vortices and control points are distributed on wing camber according to the QCM, and wing surface is divided into certain number of panels. This is the method to decide vortex intensity and blow-out intensity simultaneously from the condition that vertical speed on the camber and the wing surface is zero, upon having distributed blow-out with certain intensity inside the panel. The method solves the inverse problem with the following process: specific point distribution is so determined that the targeted velocity on the wing surface is satisfied when wing surface pressure distribution and uniform flow velocity are given; and then the panels are so rearranged as in parallel with direction of the flow on the surface of the wing calculated by using these specific points to derive the targeted wing shape. This paper describes the problem solving procedure in great detail. It also introduces examples of numerical calculations. It shows one method for solving the inverse problem in wing type using the SQCM as a simple panel method, whereas its good convergence and stability were verified. Considerations on effects of free surface and expansion of the method into three-dimensional problems will be implemented in the future. 11 refs., 8 figs.

  17. Method for calculating wave resistance in a catamaran by using a simple panel method; Kanbenna panel ho ni yoru katamaran no zoha teiko keisanho

    Energy Technology Data Exchange (ETDEWEB)

    Kataoka, K [Kyushu University, Fukuoka (Japan). Faculty of Engineering

    1997-10-01

    This paper describes a method for calculating wave resistance in a catamaran by using a simple panel method. Two Wigley models were put side by side to make a catamaran, speccular images were taken on a face symmetrical in the left and right sides, and only one side (the demi-hull) was used as a region to be calculated. Considering blow-out onto the demi-hull surface and still water surface, a model was constituted, in which discrete vortices were distributed on the demi-hull camber to flow the vortices out to an infinitely distance place from the stern. A free surface condition according to double model linearization by Dawson was derived for this model in terms of numerical analysis. The Kutta`s condition is incorporated when SQCM is used concurrently with the Rankine source method, but not incorporated when not used. Calculations were performed on both conditions. Wave resistance was derived by using pressure integral on the hull surface. It is better to consider the Kutta`s condition when the distance between the demi-hulls is small. However, if the distance is large, or speed is great for the boat length resulting in less interference between the demi-hulls, there is very little difference due to the Kutta`s condition. Difference in the wave shapes causes how waves are made to vary. 11 refs., 8 figs.

  18. FY1995 studies on saving energy by use of nitrogen- fixing bacteria; 1995 nendo chisso koteikin no katsuyo ni yoru sho energy no kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    To save energy by improving the ability of nitrogen-fixing bacteria (Kebsiella oxytoca, Azospirillum lipoferum and Sphingomonas paucimobilis) in the rhizosphere of rice, by means of genetic analysis and engineering of the nif genes. Analysis and improvement of the nif genes were performed in 3 species of nitrogen-fixing bacteria in the rhizoshere of rice. (1) In an facultative anaerobe, K. oxytoca, the repressor gene, nifL was destroyed, and the activator gene, nifA was fortified, to attain a novel mutant strain R16, which fixes nitrogen even in the presence of NH{sub 4}{sup +}. (2) In a microaerophilic nitrogen fixer, A. lipoferum, the regulatory genes draT and draG were cloned and analysed, and an improved strain TA1 was obtained by introduction of K. oxytoca nifA gene. (3) In an aerobic nitrogen-fixer S. paucimobilis, the nifA gene was cloned and sequenced, and the activity was expressed in E. coil to show that the product activates the nif promoters of Azospirillurn and Klebsiella. (4) The improved strains K. oxytoca R16 and A. lipoferun TA1 were inoculated to rice plant cultured in a pot without addition of nitrogen source. The inoculated plant showed twice as much dry weight as the noninoculated plant, showing that the improved strains are effective to stimulate the growth of rice. (NEDO)

  19. Optimal control of aerobic bacteria fermentaion by dynamic programming method. Doteki keikakuho ni yoru kokisei saikin hakko process no saiteki seigyo

    Energy Technology Data Exchange (ETDEWEB)

    Kidoushi, H; Murayama, S; Shiomi, S [Ishikawajima-Harima Heavy Industries Co. Ltd., Tokyo (Japan); Haneda, K; Yamada, Y [Asahi Chemical Industry Co. Ltd., Tokyo (Japan)

    1991-05-10

    A dynamic programing method was applied for maximizing a production yield in controlling the process of aerobic bacteria fermentation. An optimal control was carried out by air flow rate under a sufficient sugar supply condition, using the bacteria amount as a state variable and the air flow rate as an operation variable, under conditions where the sugar consuming rate is not a limiting factor. The growth and production were modelled, and the relationship of both the specific growth rate and the specific production rate to the specific respiration rate was was expressed as functional tables. A simulation was carried out, which provided an optimum air flow pattern. This relationship between the bacteria amount and the optimum air flow rate was mapped to perform a map control. Conditions other than the air flow pattern were made to agree with the previous empirical cultivation method, and experiments were conducted using a cultivation tank of 0.03 m {sup 3}. A yield increase of 13.6% over the conventional method was attained, thus the reasonability of the modelling was verified. It was found that there are portions where the width of the optimum air flow control is wide and narrow, and it is possible to reduce the number of maps if this this is taken into account. 4 refs., 8 figs., 2 tabs.

  20. Evaluation of water content in rock mass by electromagnetic and resistivity tomography. Denjiha, hiteiko tomography ni yoru ganban no gansui jotai hyoka

    Energy Technology Data Exchange (ETDEWEB)

    Inaba, T; Inoue, M; Matsumoto, K [Kajima Corp., Tokyo (Japan)

    1993-10-31

    As a method to evaluate the rock mass, electromagnetic tomography and resistivity tomography were tested on the original site. The electromagnetic tomography can tomographically analyze the propagation velocity and initial amplitude damping. The resistivity tomography uses a finite element method from the initial resistivity distribution model and finally gives a model which is nearly equal to the actual resistivity distribution. Both the above tomographic analyses can detect the crushed spot as a low velocity, high damping and low resistivity spot. However, the electromagnetic tomography could detect finer structure than the resistivity tomography. The water content of rock mass was evaluated from the damping coefficient which was given by the amplitude damping tomography of electromagnetic wave. If it is compared with the water content which is given by the dielectric constant of velocity tomography, there partially exists discrepancy between both, because the damping coefficient contains information on cracks which disperse and reflect the electromagnetic wave. Between the resistivity and porosity, there exists a known experimental formula, which was satisfied by the presently given resistivity. 9 refs., 10 figs.

  1. New computational and experimental stress analysis method for the design decision on optimum piston configuration. Piston oryoku no computer simulation to shinshikenho ni yoru keijo saitekika

    Energy Technology Data Exchange (ETDEWEB)

    Anno, N; Sugita, J [Honda R and D, Co. Ltd., Saitama (Japan)

    1993-03-01

    Piston troubles are mostly caused by cracks generating in each part of a piston. The finite element method (FEM) has been used for stress analysis of the piston, but has not been applied enough to design optimum configurations due to too much time for making models. In this study, stress analysis was carried out by the boundary element method (BEM), with which it is easy to make models and to change configurations, with various improvements. In addition, methods to execute a thermal load fatigue test and an actual running test to confirm analytical results were also improved. BEASY was used as basic software for analysis by BEM, and some improvements such as reduction of CPU time and optimization of memory using methods were carried out. It was easy to change configurations of the models by BEM, and the effect of the change in the piston boss configuration upon the stress agreed well with the actual test result. Design and evaluation of the optimum configuration has become easier by feedback of the results of the newly developed thermal load fatigue test to the analysis by BEM. 5 refs., 12 figs., 2 tabs.

  2. Fabrication of low cost high performance large size composite structures by electron beam curing (EBC); Denshisen koka (EBC) ni yoru tei cost koseino ogata fukugozai kozo no seizo

    Energy Technology Data Exchange (ETDEWEB)

    Kamimura, K.; Parrot, P.

    1996-03-15

    This article introduces the electron beam curing (EBC), which is high speed non-heating cure technique for the high performance resin for structures, conducted by Aerospacial Co., Ltd. In this technique, very strong electron beam and X-ray are used in response to the thickness of curing region of members, and the muzzle has energy of 10 MeV as permeation control energy and power of 20 kW as cure time control power. Advantages of fabrication of composite products by EBC is derived from the elimination of exoergic and heating curing processes and the local cure molding. For the EBC, the residual stress is not generated, the size is stable, the insertion of different materials is easy without mismatch of thermal expansion between the composites and metals, the homogeneous bridge can be obtained to stabilize the material quality, the processing time can be shortened, it is suitable to mass production, and the cure of products can be controlled. About 30% to 40% of the cost of products can be reduced. 1 ref., 6 figs., 1 tab.

  3. Mixing of two-component flow in a simplified stirred tank with cellular automaton method; Cellular automaton ho ni yoru kakuhan sonai no niseibunryu no kongo keisan

    Energy Technology Data Exchange (ETDEWEB)

    Watanabe, S; Takahashi, R [Tokyo Institute of Technology, Tokyo (Japan)

    1996-01-25

    The applicability of a cellular automaton technique to engineering problems will be examined by dealing with mixing in multicomponent flow. The quality and accumulation rate of the product depend on the mixing of raw materials basically. After thoroughly understanding the mixing process, we optimize the geometrical allocation of such elements as a propeller with casing, a chimney and a product output nozzle in a reactor. Usually mixing is formulated by partial differential equations of conservation laws and empirical formulae, and solved numerically by the finite difference technique. In order to evaluate the fine structure of time-dependent interfacial behavior in multicomponent flow, the cellular automaton technique is used, since this has an advantage of describing the pattern formation in detail. It will be demonstrated in the present paper that mixing of two-component immiscible flow is reasonably simulated mesoscopically. 13 refs., 17 figs.

  4. Efflux Performance of Submicron Particles in Packed Bed under Periodic Pressure Conditions; Shuki atsuho ni yoru juten sonai sabumikuron biryushi no ryushutsu tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Ping, Z; Iritani, E; Murase, T [Nagaya Univ. Nagoya (Japan). Department of Chemical Engineering

    1997-09-01

    Permeation experiments of ultrapure water were conducted under periodic pressure conditions using a packed bed obtained by dispersing submicron particles of polymethyl methacrylate (PMMA) uniformly into a packed bed of particles of White Alundum. It is clearly demonstrated that washing performance under periodic pressure conditions where the permeation pressure is applied periodically is improved dramatically, compared with that under constant pressure conditions. It is also shown that the effect of periodic pressure operation is especially noticeable in the initial stage of the pressurizing period, and that a pressurizing time smaller than 2 min is very effective under conditions examined in this study. 4 figs.

  5. Development of optical interference-type micro accelerometer for subsurface microseismic measurement; Micromachining ni yoru chika danseiha keisoku no tame no hikari kanshogata kasokudo sensor no kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    Hirata, K; Niitsuma, H; Esashi, M [Tohoku University, Sendai (Japan). Faculty of Engineering

    1997-10-22

    Manufacture is under way of an optical interference-type micro accelerometer making use of the micromachining technology and an optical fiber measuring system for detecting microseismic waves in the ground. The sensor is required to be capable of detecting acceleration 0.1-1gal in amplitude, to be flat in amplitude characteristic in a frequency range of 10Hz-several kHz, to be ensured of straight phase characteristics to enable the measurement of transient phenomena, to be low in cross sensitivity, and to be high in resistance to water, pressure, and heat. The sensor is constructed in the following way. In the process for treating silicon, anisotropic etching is performed for the formation of a gap between the fiber end face and oscillator, boron is diffused, a stopper is formed, and then the silicon is subjected to penetrating etching. In the process for the optical fiber section, an optical fiber is inserted into a glass tube and fixed by an adhesive agent, and then the glass tube end face is polished, this together with the fiber end. Indium-tin oxide is sputtered onto the glass tube end. Finally, the sensor is assembled. 5 refs., 4 figs., 1 tab.

  6. Development of micro capacitive accelerometer for subsurface microseismic measurement. Second Report; Micromachining ni yoru chika danseiha kenshutsu no tame no silicone yoryogata kasokudo sensor no seisaku. 2

    Energy Technology Data Exchange (ETDEWEB)

    Nishizawa, M; Lim, G; Niitsuma, H; Esashi, M [Tohoku University, Sendai (Japan)

    1997-10-22

    Micromachining-aided manufacture is under way of a silicon capacitive accelerator sensor, high in sensitivity and broad in bandwidth, for detecting subsurface microseismic waves. The sensor detects acceleration by use of changes in capacities of the top and bottom capacitors generated when a spring-supported weight experiences displacement upon application of acceleration to the said weight. A diode bridge circuit is employed as the circuit for detecting acceleration. As for sensitivity of the sensor, when the virtual noise inputted into the electronic circuit is presumed at 1{mu}V and the circuit driving voltage at 5V, the sensor minimum detectability will be 2.5mgal in the presence of a 3{mu}m gap between the weight and an electrode plate. The natural vibration frequency is set at 1kHz. Such specifications may be realized using the current micromachining technology, and possibilities are that the bandwidth will be further expanded when the sensor is used in a servo-type configuration. The effort is still at the stage of acceleration sensor manufacturing, with a stopper just formed for the silicon weight. 9 refs., 6 figs., 1 tab.

  7. Fundamental principles of a new EM tool for in-situ resistivity measurement. 2; Denji yudoho ni yoru gen`ichi hiteiko sokutei sochi no kento. 2

    Energy Technology Data Exchange (ETDEWEB)

    Noguchi, K; Aoki, H [Waseda University, Tokyo (Japan). School of Science and Engineering; Saito, A [Mitsui Mineral Development Engineering Co. Ltd., Tokyo (Japan)

    1997-10-22

    In-situ resistivity measuring devices are tested for performance in relation to the principle of focusing. After numerical calculation, it is shown that in the absence of focusing the primary magnetic field will prevail and that changes in the separate-mode component will be difficult to detect in actual measurement because the in-phase component assumes a value far larger than the out-of-phase component. Concerning the transmission loop radius, the study reveals that a larger radius will yield a stronger response and that such will remove the influence of near-surface layers. Two types of devices are constructed, one applying the principle of focusing and the other not, and both are activated to measure the response from a saline solution medium. The results are compared and it is found that focusing eliminates the influence of the primary magnetic field and that it enables the measurement of changes in resistivity of the medium which cannot be detected in the absence of focusing. 3 refs., 9 figs.

  8. Fault fracture zone evaluation using borehole geophysical logs; case study at Nojima fault, Awaji island; Kosei butsuri kenso ni yoru danso hasaitai no hyoka

    Energy Technology Data Exchange (ETDEWEB)

    Ikeda, R; Omura, K [National Research Institute for Disaster Prevention, Tsukuba (Japan); Yamamoto, T [Geophysical Surveying and Consulting Co. Ltd., Tokyo (Japan)

    1997-10-22

    Ikeda, et al., in their examination of log data obtained from a borehole (2000m deep) drilled at Ashio, Tochigi Prefecture, where micro-earthquakes swarm at very shallow levels, pay special attention to porosity. Using correlationship between the porosity and elastic wave velocity/resistivity, the authors endeavor to find the presence of secondary pores, dimensions of faults, composition of water in strata in faults, and difference in matrix between rocks, all these for the classification and evaluation of fault fracture zones. In the present report, log data from a borehole (1800m deep) drilled to penetrate the Nojima fault (Nojima-Hirabayashi, Awaji island) that emerged during the Great Hanshin-Himeji Earthquake are analyzed in the same way as the above-named Ashio data, and the results are compared with the Ashio results. Immediately below the Nojima-Hirabayashi fault fractured zone, stress is found remarkably reduced and the difference stress quite small in size. This is interpreted as indicating a state in which clay has already developed well in the fault fractured zone ready to allow the occurrence of shear fracture or a state in which such has already occurred for the release of stress. 4 refs., 5 figs.

  9. Simulation of fault-bend fold by incompressible Newtonian fluid; Hiasshukusei Newton ryutai ni yoru danso oremagari shukyoku kozo no simulation

    Energy Technology Data Exchange (ETDEWEB)

    Tamagawa, T; Matsuoka, T [Japan Petroleum Exploration Corp., Tokyo (Japan); Tsukui, R [Japan National Oil Corp., Tokyo (Japan). Technology Research Center

    1997-10-22

    Incompressible Newtonian fluid simulation is experimentally applied to faults typical of the compression and extension fields. A fault-bend folding structure of the flat-ramp flat fault in the compression field and a folding structure of a normal fault in the extension field are studied, and the results are compared with those obtained by the balanced cross section method. The result of calculation indicates that the velocity gradient with the ramp angle set at 30deg is correspondent to stress and that stress concentration is taking place at the ramp section of the fault. This solution is an approximation and does not necessary support the conservation of area but, when the ramp angle is allowed to change from 10 through 40deg, it is found that the conservation of area holds though roughly. It is found that the configuration of the folding structure formed by a flat-ramp flat fault is positioned between the anomalous-mode layer parallel shear typical of a balanced cross section and the folding structure formed by a vertical shear. 7 refs., 7 figs.

  10. Estimation of underground structures in Kyoto city by seismic-array observations of microtremors; Bido no array kansoku ni yoru Kyoto shinai no chika kozo tansa

    Energy Technology Data Exchange (ETDEWEB)

    Miyakoshi, K; Kagawa, T; Akazawa, T [Osaka Soil Test, Osaka (Japan); Ogawa, Y; Shimizu, K [Osaka Gas Corp., Osaka (Japan); Ejiri, J [Obayashi Corp., Tokyo (Japan)

    1997-10-22

    Observations of microtremors were carried out to estimate the S-wave velocity structure by using arrays of seismographs around the Kyoto Research Park. The observation points were so arranged that equilateral triangle arrays may be formed with maximum radii at 0.2 km, 0.4 km and 0.8 km respectively with the premises of the Kyoto Research Park as the center. The seismographs have used seven vertical movement components (PELS), and were adjusted to a period of eight seconds. In addition, high-cut filters of 4 Hz were used because the observation areas are located in urban areas with heavy traffic. The analysis has used the spatial self-correlation method as a means to estimate phase velocity of surface waves contained in microtremors. As a result, phase velocity estimation has become possible for frequencies from about 0.4 Hz to 2 Hz, whereas the S-wave velocity structure was estimated to a depth of down to about 900 m by using as reference the result of the reflection method exploration having been carried out in the present areas. In addition, it was suggested that microtremors with frequencies higher than 1 Hz are in unsteady state in terms of time or space. 4 refs., 7 figs., 1 tab.

  11. Applying flame colors to mixture strength measurement in laminar premixed flames. 2nd Report; Kaenshoku ni yoru soryu yokongo kaen no toryohi keisoku. 2

    Energy Technology Data Exchange (ETDEWEB)

    Tatsuta, S. [Asahikawa National College of Technology, Hokkaido (Japan); Fujita, O.; Ito, K. [Hokkaido University, Sapporo (Japan). Faculty of Engineering

    1998-09-25

    The flame color method to measure mixture strength in laminar premixed flames was investigated as a new combustion diagnostic technique. Flame colors were quantitatively determined by chromaticity coordinates (x, y) defined by the CIE 1931 standard colorimetric system. Using 12 types of hydrocarbons, the (x, y) of an inner cone in premixed laminar flames held on a circular tube burner were measured with a colorimeter, and the relationship between the (x, y) and the equivalence ratio {phi} of the mixture was examined in a range of {phi}=0.9 to 1.4. The experimental results indicated that the equivalence ratio could be measured with accuracy of 0.008-0.014 and error due to axial position in the inner cone was less than 0.02-0.05. Humidity of air had almost negligible effects on the accuracy of the measurement. Results also indicated that the effect of back-light could be corrected by introducing the concept of additive mixture of color stimuli. 21 refs., 8 figs., 2 tabs.

  12. Rapid production of metallurgical coke by a pressurized hot-briquetting method. Netsukan kaatsu seikei ni yoru cokes no jinsoku seizo no kokoromi

    Energy Technology Data Exchange (ETDEWEB)

    Miura, K.; Hayashi, J.; Noguchi, N. (Kyoto University, Kyoto (Japan). Research Laboratory of Carbonaceous Resources Conversion Technology); Hashimoto, K. (Kyoto University, Kyoto (Japan). Faculty of Engineering)

    1993-09-20

    Rapid production of metallurgical coke from non- and slightly coking coals was studied by pressurized hot-briquetting method. Coal specimens were filled into the mold after pulverizing, and heated at a constant temperature rise rate up to caking temperature under loading pressure to obtain caked coal specimens. Such specimens were then carbonized in nitrogen gas at 800[degree]C. As a result, the coke obtained was superior in compressive strength as compared with commercial cokes, however, its CO2 reactivity was very high requiring heating up to 1,000[degree]C to decrease it, while the reactivity was strongly dependent on coal kind. The optimum processing conditions for slightly coking coal were as follows; loading pressure: 10 [times] 10[sup 5] Pa or more, temperature range under loading pressure: 300-450[degree]C, temperature rise rate: 2-100[degree]C/min, and caking temperature: nearly 500[degree]C. No coke could be produced from coking coals because no volatile matter could be removed from it in a short time under pressure. 13 refs., 8 figs., 1 tab.

  13. Low-frequency noise reduction of fans using the acoustically treated duct; Kyuon duct ni yoru fan soon no teishuhaiki teigen

    Energy Technology Data Exchange (ETDEWEB)

    Kaneko, K; Fujii, S [University of Osaka Prefecture, Osaka (Japan). Faculty of Engineering; Shirasaya, H [Kawasaki Heavy Industries, Ltd., Tokyo (Japan)

    1994-12-25

    Reducing noise in a low frequency region of 1 kHz or less has become an important problem as a result of emergence of an ultra-high bypass engine in aircraft engines. Therefore, an attempt was made of experimenting and analyzing noise absorption characteristics in low-frequency noises. In the experiment, a low-frequency flow with an air volume of about 3 m{sup 3}/minute was made at a stable operating point of a fan device consisting of moving blades and static blades, with a sound absorbing duct disposed in the forward section. The duct is a 500-mm long steel box with an oblong cross section, in which the top and the bottom parts can move vertically, and a variable air layer was formed between a sound absorbing material (a sheet material made of microfine spherical resin powders solidified to a thickness of 6 mm) and a rigid wall made of iron plate. Noise waves and sound absorption amount were measured on different air layer thicknesses, and analyzed theoretically. As a result, such findings were obtained as: the sound absorption amount is affected by the main stream direction mode of sound pressures in cavity; valleys are formed where the sound absorption amount decreases remarkably in a specific cycle; and peaks are built where the sound absorption amount increases in other regions. 7 refs., 12 figs.

  14. Wind tunnel investigation of a USB-STOL transport semi-span model. 2; CAD sekkei ni yoru USB-STOL ki hansai mokei no fudo shiken. 2

    Energy Technology Data Exchange (ETDEWEB)

    Takahashi, H; Okuyama, M; Fujieda, H; Fujita, T; Iwasaki, A [National Aerospace Laboratory, Tokyo (Japan)

    1994-11-01

    The Quiet Short Take-Off and Landing (QSTOL) Experimental Aircraft `ASKA` has been researched and developed by the National Aerospace Laboratory (NAL). The `ASKA` was based upon the airframe of the home produced C-1 tactical transport which was modified into the Upper Surface Blowing (USB) -powered high- lift STOL aircraft. The wing configuration, however, was not changed. Therefore, this Experimental Aircraft does not always have the optimum configuration of a USB-type aircraft. So the authors tried to improve the aerodynamic characteristics of the STOL Aircraft. This paper describes the investigations which have been conducted to improve the aerodynamic characteristics of a subsonic jet transport semi-span model with an Upper Surface Blown Flap system which has been newly designed using the NAL STOL-CAD program. The model had an 8.2{degree} swept wing of aspect ratio 10.0 and four turbofan engines with short USB nozzles. The tests were conducted in the NAL 2{times}2m Gust Wind Tunnel with closed section and results were obtained for several flap and slat deflections at jet momentum coefficients from 0 to 1.85. Compared with the aerodynamic characteristics of the `ASKA` model, we determined that the airframe weight can be reduced and the aerodynamic characteristics can be improved significantly. 14 refs., 44 figs.

  15. Entrapment and degradation of particulate organics in anaerobic fluidized bed reactor. Kenkisei ryudosho ni yoru fuyusei yuki kokeibutsu no hosoku to bunkai

    Energy Technology Data Exchange (ETDEWEB)

    Araki, N. (Nagaoka National College of Technology, Niigata (Japan)); Harada, H.; Momonoi, K. (Nagaoka University of Technology, Niigata (Japan))

    1993-08-10

    A start-up experiment on an anaerobic fluidized bed reactor has been performed using simulated wastewater added with cellulose as a suspended substance to discuss behavior of suspended base materials and change in bacterial phases of biofilm constituting bacteria cluster. Cellulose removal efficiency of the reactor was 98% of a volumetric load of up to 2 g COD[center dot]1[sup -1][center dot]d[sup -1] performing efficient decomposition including methane. Cellulose content in the fluidized bed increased to 3% to 16% of the fluidized bed MLVSS with increase in a volumetric load from 3 to 10 g COD[center dot]1[sup -1][center dot]d[sup -1]. Bacteria, of which activity changes largely with growth of biofilms among other anaerobic bacteria clusters, are acid producing bacteria and acetic acid-selective methane bacteria, which have grown to 31 times and 70 times at maximum respectively as compared to their species sludge. Sludge resident time in the reactor has dropped rapidly from 80 days to 2.6 days as a result of accumulation of cellulose in the biofilms. The cellulose decomposing activity of the biofilms increases as the biofilms grow. The maximum value was 0.20 Cellulose[center dot]g[sup -1] VSS[center dot]d[sup -1]. 19 refs., 8 figs., 4 tabs.

  16. Fluidized pellet bed bioreactor system for SS, COD, nitrogen and phosphorus; Ryudoso zoryu bio reactor system ni yoru SS, COD, chisso oyobi rin jokyo

    Energy Technology Data Exchange (ETDEWEB)

    Shimizu, T.; Tanbo, N.; Kudo, K. [Hokkaido University, Sapporo (Japan). Faculty of Engineering; Hamaguchi, T.; Nakabayashi, A. [Tsukishima Kikai Co. Ltd., Tokyo (Japan)

    1995-02-10

    An examination was carried out on a treatment system which was constituted of an aerobic fluidized pellet bed (AFRB) bioreactor and the two steps comprising a contact aeration process and a sand filtration process for sewage/drainage treatment. The following data were obtained from the experiment by a pilot plant installed in a sewage plant. The removal ratios were the same as or above 95% in SS, 95% in total phosphorus, 85% in COD and 80% in total nitrogen. The highly dense sludge pellets formed in the AFPB bioreactor in summer contained aerobic filamentous bacteria that were capable of multiplying. The sludge retention time of this bioreactor was 2.2 to 8.1 days which were sufficient for the multiplication of denitrifiers, whose number and activity were also satisfactory for dinitrification. Further, other microorganisms existed in the bioreactor such as sulfate reducers and methanation bacteria. The role of a contact aeration tank was the oxidized decomposition and nitration of soluble BOD, and the biofilm had niterite and nitrate bacteria adhered to it. Assuming the retention time of the tank was two hours, the nitration ratio was 90% or more at the water temperature of 15{degree}C or higher. 29 refs., 12 figs., 2 tabs.

  17. Characterization of algae removal in a fluidized bed biofilm reactor system for lake water treatment; Kokisei ryudosho seibutsu rokaho ni yoru kosuichu no sorui jokyo tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Tanaka, T.; Tsuzuki, K.; Nishijima, N.; Takagi, T. [Hitachi, Ltd., Tokyo (Japan); Terazono, K. [Water Resources Environment Technology Center, Tokyo (Japan)

    1998-04-10

    This paper describes a pilot plant study on algae removal of a fluidized bed biofilm reactor system for lake water treatment. The system does not need backwashing because the fluidized bed suffers no clogging. Moreover, the system uses dissolved oxygen in influent water for aerobic biological treatment without aeration equipment. Thus, this system is a low energy and easy maintenance way to purify eutrophic lake water. The system was operated continuously at a flow rate of 1500 m{sup 3}/d{sup 1} for 9 months at Tsuchiura Port in Lake Kasumigaura. In this study, chlorophyll-a and dissolved oxygen in both influent and effluent water were monitored continuously. In summer (August to September) when water bloom occurred, the average removal efficiency of chlorophyll-a was 64% at the average influent chlorophyll-a concentration of 137.8 {mu}g/l{sup 1}. During the total experimental period (9 months), the average daily amount of removed chlorophyll-a was 40.3 g/d{sup 1} at the average influent chlorophyll-a concentration of 89.5 {mu}g/l{sup 1}. By analyzing the relationship between the removed chlorophyll-a and the consumption of dissolved oxygen, it was estimated that almost all of algae trapped in the reactor was degraded biologically. 20 refs., 12 figs., 2 tabs.

  18. Hydrophobization og the surface fo malachite with some fluorosurfactants. 2,3 no fussokei kaimen kasseizai ni yoru malachite hyomen no sosuika

    Energy Technology Data Exchange (ETDEWEB)

    Kobayashi, M [National Reserach Institute for Pollution and Resources, Tsukuba (Japan); Wakamatsu, T [Kyoto University, Kyoko (Japan). Faculty of Engineering

    1991-10-18

    The depleting trends of high-grade ores in recent years make it unavoidable to float ores in fine powder forms. To achieve this, research and development is important on such a recovering agent that can hydrophobize the surfaces of useful ores selectively and powerfully. This paper describes the discussion on three kinds of fluorosurfactant, namely perfluorooctanoic acid, Ftergent-100 and Ftergent-150, whic were used to hydrophobize the surface of malachite, and compared of its utilization possibility as a recovery agent with other surfactants. As a result, it was found that the Ftergent-100, which contains five CF{sub 3}{sup {minus}} in one molecule having extremely low critical surface tension, and the Ftergent-150 can hydrophobize sufficiently the malachite surface and provide good deposition. The region providing good deposition was at a weak-acidic to weak-alkali region in the case of the Ftergent-150. Therefore, both materials are thought they could be used as a recovering agent. 8 refs., 10 figs., 3 tabs.

  19. Selective extraction of palladium with caffeine from acidic chloride media; Sansei enkabutsu yoeki karano kafuein ni yoru parajiumu no sentakuteki chushutsu

    Energy Technology Data Exchange (ETDEWEB)

    Kaikake, K.; Baba, Y. [Miyazaki University, Miyazaki (Japan). Faculty of Engineering

    1999-06-10

    In order to examine the possibility of caffeine as an extractant, the extraction of metal ions from acidic chloride media was studied at 298 K using the mixture solvent of chloroform and 2-ethyl-1-hexanol. Caffeine has exhibited a high selectivity for palladium (2) over base metals such as copper (2), nickel (2), and iron (3), and over precious metal such as platinum (4). The stoichiometric relation in the extraction of palladium (2) with caffeine was elucidated by examining the effects of chloride ion, hydrogen ion, and caffeine concentrations on its extractability. In addition, palladium (2) was found to be extracted selectively with caffeine from the mixture containing a 25-fold amount of platinum (4) or copper (2). The stripping of palladium (2) was performed to an extent of 80% by a single batchwise treatment with an aqueous mixture solution of hydrochloric acid and thiourea. (author)

  20. Study on the inside gas flow visualization of oxygen sensor cover; Kashika ni yoru O2 sensor cover nai no gas nagare hyoka

    Energy Technology Data Exchange (ETDEWEB)

    Hocho, S; Mitsuishi, Y; Inagaki, M [Nippon Soken, Inc., Tokyo (Japan); Hamaguchi, S; Mizusawa, K [Toyota Motor Corp., Aichi (Japan)

    1997-10-01

    In order to make clear the difference of the response time between the oxygen sensors with different protection covers, we visualized gas flow inside of sensor covers by means of two experimental methods: One is `Smoke Suspension Method` using liquid paraffin vapor as the smoke. With smoke suspension method, we detected the streamlines inside of the covers. The other is `Color Reaction Method` using the reaction of phenolphthalein and NH3 gas. With color reaction method, we confirmed the streamline inside of the cover and furthermore detected the difference of the response time of each sensor. 3 refs., 7 figs., 1 tab.

  1. Estimation of tire characteristics by concerning test data of vehicles; Jidosha no senkai shiken data ni yoru dire tokusei no suisan

    Energy Technology Data Exchange (ETDEWEB)

    Nakamura, M; Sekine, T; Nagae, H [Nihon University, Tokyo (Japan)

    1997-10-01

    To study and/or develop the vehicle motion of a braking in turns theoretically, the cornering characteristics of the tire under the action of braking forces must be required. On the other hand, such data are very few to be published and also there be few tire testing machine to be able to use. The authors tried to derive such data from the vehicle behaviors in steady turns and braking in turns. Because each wheel loads are unknown factors, the two wheeled vehicle model are employed in analysis. The methodology of analysis and the reasonable results are presented in this paper. 5 refs., 10 figs., 2 tabs.

  2. Analysis of stress distribution of timing belts by FEM; Yugen yosoho ni yoru timing belt oryoku kaiseki (belt code oryoku bunpu kaiseki hokoku)

    Energy Technology Data Exchange (ETDEWEB)

    Furukawa, Y; Tomono, K; Takahashi, H; Uchida, T [Honda R and D Co. Ltd., Tokyo (Japan)

    1997-10-01

    A model of the belt analyzed by-ABAQUS (: a general nonlinear finite element program) successfully confirmed the mechanism that generates the belt cord stress. A quite good agreement between experimental and computed results for the stress distribution of the belt cord. It is found that maximum stress of the cords occurs near the root of the tooth by calculation, where the belt cords break off. 3 refs., 9 figs.

  3. Experimental analysis of the structure attenuation characteristics on engine noise by pseudo cylinder pressure excitation; Giji tonaiatsu kashin ni yoru engine kozo no soon tokusei hyoka

    Energy Technology Data Exchange (ETDEWEB)

    Ozawa, H; Nakada, T [Isuzu Advanced Engineering Center, Tokyo (Japan)

    1997-10-01

    The engine structure attenuation has been experimentally analyzed by the newly developed in-cylinder excitation system. It can reproduce the complete cylinder pressure in non-running engine conditions by adopting the hydraulic and the piezoelectric actuator. The structure attenuation measured in this system has a good coincidence with the ones measured in actually engine operating conditions, meanwhile the current method, which applied only high frequency components as the excitation pressure, was shown to have the unsatisfied agreement. As a result, the proposed system has been concluded to be very useful to estimate the engine noise characteristics in non-running conditions. 4 refs., 11 figs., 1 tab.

  4. Improvement of road noise by reduction of acoustic radiation from body panels; Panel no hoshaon teigen ni yoru road noise no kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Kamura, T; Utsunomiya, A; Sugihara, T; Tobita, K [Mazda Motor Corp., Hiroshima (Japan)

    1997-10-01

    This paper describes road noise reduction methods accomplished by reducing acoustic power radiated from body panels. Fundamental study of acoustic and dynamic characteristics with rectangular panels revealed following results: (1) The lower stiffness panel had lower radiation efficiency and made damping materials work more effective to reduce the acoustic power. (2) The acoustic power was also reduced by designing the panel so that it can generate the vibration of (2, 2) mode, which has the lowest radiation efficiency, in road noise frequency region. By applying these methods to a vehicle floor, we confirmed the improvement of road noise performance. 3 refs., 12 figs.

  5. Development of aluminium viscous damper by high speed MIG welding process; Kosoku MIG yosetsuho ni yoru aluminium sei viscous damper no kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    Hino, H; Hotta, M [Nippon Light Metal Co. Ltd., Tokyo (Japan); Maeda, Y; Shimizu, H [Fukoku Co. Ltd., Saitama (Japan)

    1997-10-01

    We have developed a welded aluminum viscous damper to improve the joining strength between the case and the cover of the conventional damper mechanically fastened by adhesion. The distortion of the welded damper was decreased to an acceptable level using the high speed MIG welding process. Sound quality and good appearance were obtained by optimizing the initial speed of the filler wire and by controlling the welding conditions at the starting part and in the lap part. The leakage load and the fatigue limit of the welded damper were 5 and 10 times those of the conventional damper, respectively. 3 refs., 15 figs.

  6. Degradation of organophosphoric acid triesters by the aquatic bacteria and toxicity to fish; Yuki rinsan toriester no suichu saikin ni yoru bunkai to dokusei

    Energy Technology Data Exchange (ETDEWEB)

    Kawai, S. [Kobe College, Hyogo (Japan)

    1996-09-10

    This paper describes biodegradation of organophosphoric acid triesters (OPEs) in water environment, in particular, by aquatic bacteria. In culture experiment using river water in Osaka, aryl system OPEs such as triphenyl phosphate (TPP) and tricresyl phosphate (TCP) are more easily degraded than alkyl system OPEs, and OPEs including Cl are hardly degraded. Properties of isolated TBP degradation bacteria and enzymes, and TCP degradation bacteria isolated from Mukogawa river water are examined. OPEs are toxic to fishes equivalently to or more than organophosphoric system pesticides. However, the cause of their toxicity can`t be interpreted only by cholinesterase activity hindrance of nervous system. Absorption, accumulation, metabolism and degradation of OPEs are dependent on fishes and kinds of OPEs. Although the toxicity evaluation using experimental animals is important, the evaluation using cultured bacteria is recognizing once again from various viewpoints. Direct toxicity of OPEs to fishes or aquatic organisms is yet unidentified, however, the influence of OPEs on human beings is rather important. 39 refs., 10 figs., 2 tabs.

  7. Soot and NOx simultaneous reduction by use of CO2 mixed fuel; Ekika CO2 yokai nenryo ni yoru diesel kikan no susu, NOx no doji teigen

    Energy Technology Data Exchange (ETDEWEB)

    Senda, J; Yokoyama, T; Ikeda, M; Fujimoto, H [Doshisha University, Kyoto (Japan); Ifuku, Y [Kubota Corp., Osaka (Japan)

    1997-10-01

    We propose the new fuel injection system by use of diesel fuel dissolved with CO2 to reduce both soot and NOx simultaneously. In this paper spray combustion characteristics of CO2 mixed fuel is reported. It is revealed that flame temperature and KL factor at the CO2 mixed fuel combustion are lower than at the only n-tridecane combustion due to separation or partly flashing of CO2component. And the result of exhaust gas measurement shows the capability that CO2 mixed fuel is able to reduce both soot and NOx simultaneously. 12 refs., 7 figs., 1 tab.

  8. Automobile simulation model and its identification. Behavior measuring by image processing; Jidosha simulation model to dotei jikken. Gazo kaiseki ni yoru undo no keisoku

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, H; Morita, S; Matsuura, Y [Osaka Sangyo University, Osaka (Japan)

    1997-10-01

    Model simulation technology is important for automobiles development. Especially, for the investigations concerning to ABS, TRC, VDC, and so on, the model should be the one which can simulates not only whole behaviors of the automobile, but also such internal information as torque, acceleration, and, velocity of each drive shafts, etc.. From this point of view, 4-wheels simulation model which can simulates almost over 50 items, was made. On the other hand, technique of 3-D image processing using 2 video cameras was adopted to identify the model. Considerably good coincidences were recognized between the simulated values and measured ones. 3 refs., 7 figs., 2 tabs.

  9. Identification of Fusarium oxysporum in the fluid of hydroponic culture using DNA analysis; DNA kaiseki ni yoru suiko saibai yoekichu no horenso ichobyokin

    Energy Technology Data Exchange (ETDEWEB)

    Oyama, K.; Kawabata, T. [Chugoku Electric Power Co. Inc., Hiroshima (Japan)

    1999-09-24

    In the case of circularly using a fluid of the hydroponic culture for crops such as vegetable, the destructive damage is caused when specified harmful germs multiply in the growing crop. therefore, it is necessary to find the germs in question out and deal with them as quickly as possible. In this paper, studies were made on a sure identification technology of F. oxysporum using DNA analysis and the measures to prevent crop damages caused by diseases. The results of the study are reported. (translated by NEDO)

  10. Character of photovoltaic/thermal hybrid collector. Character analysis by numerical calculation; Taiyoko netsu hybrid collector no tokusei. Suchi keisan ni yoru tokusei kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Morita, Y; Iwawaki, T; Fujisawa, T; Tani, T [Science University of Tokyo, Tokyo (Japan)

    1997-11-25

    In order to investigate characteristics of photovoltaic (PV)/thermal hybrid collectors (PV/T{sub s}) operating under varying conditions, energy equilibrium equations have been developed for numerical calculation, and the calculated results were compared with the observed ones. The calculated characteristics are close to the observed ones, both for photoelectric conversion and heat collecting characteristics, demonstrating validity of these energy equations. It is found, by comparing characteristics of PV/T{sub A} (covered with glass) with those of PV/T{sub B} (not covered with glass), that these characteristics are greatly affected by glass cover. Maximum overall excergy levels attained are 13.29% with PV/T{sub A} and 11.48% with PV/T{sub B} under the conditions of solar radiation intensity H: 800W/m{sup 2}, ambient temperature: 20degC and wind velocity: 0.5m/s, where flow rates of heat medium are 2.0times10{sup -3} and 4.0times10{sup -3}kg/s, respectively. Thus, the PV/T{sub A} system has a higher maximum excergy efficiency than the PV/T{sub B} system. The PV/T{sub A} gives water of higher temperature, demonstrating that covering the system with glass increases maximum excergy efficiency and optimum temperature. 6 refs., 5 figs., 2 tabs.

  11. Optimal operation by dynamic programming in a solar/electric hot-water system; Taiyonetsu/denryoku kyuto system no doteki keikakuho ni yoru saiteki un`yo

    Energy Technology Data Exchange (ETDEWEB)

    Edo, S; Kenmoku, Y; Sakakibara, T [Toyohashi University of Technology, Aichi (Japan); Nakagawa, S [Maizuru College of Technology, Kyoto (Japan); Kawamoto, T [Shizuoka University, Shizuoka (Japan)

    1997-11-25

    With regard to utilization of a solar/electric hot-water system, a discussion was given by using a dynamic programming method on operation of a system which minimizes power charge. The discussed system is an installation in a welfare facility accommodating 100 persons, where solar heat is stored in a heat storage tank from a heat collector, and utilized for hot water supply. If the solar heat is insufficient for required hot water quantity, the water is heated by using an electric heater. The discussion compared the system operation using the dynamic programming method with the following two systems: the operation method 1, which does not utilize insolation forecast and the operation method 2, in which insolation forecast is utilized and late-night electric power is utilized for heating water in shortage. As a result of the calculation, the operation using the dynamic programming method conducts heat storage by utilizing the late-night power even if insolation is sufficient in winter in order to suppress heating by utilizing late-night power for days with less insolation. Thus, suppression is given on excessive utilization of day-time power and on rise in annual maximum power demand. It was found that the present system reduces power consumption by 37.7% when compared with the operation method 1, and 22.7% when compared even with the operation method 2. 3 refs., 5 figs., 3 tabs.

  12. Estimation of clearness index using neural network with meteorological forecast; Kisho yoho wo nyuryoku toshita neural network ni yoru seiten shisu no yosoku

    Energy Technology Data Exchange (ETDEWEB)

    Nishimura, S; Kenmoku, Y; Sakakibara, T [Toyohashi University of Technology, Aichi (Japan); Nakagawa, S [Maizuru National College of Technology, Kyoto (Japan); Kawamoto, T [Shizuoka University, Shizuoka (Japan)

    1997-11-25

    Discussions were given on estimation of clearness index in order to operate stably a solar energy utilizing system. All-sky insolation amount varies not only by change in the climate, but also seasonal change in the sun`s altitude. Therefore, a clearness index (ratio of all-sky insolation to out-of-atmosphere insolation) was used. The larger the value, the higher the solar ray permeability. The all-sky insolation amount is a measured value, while the out-of-atmosphere insolation amount is a calculated value. Although the clearness index may be roughly estimated by weather forecast, the clearness index varies largely even on the same weather forecast, especially for cloudy days, if a weather forecast actually having error is used. Therefore, discussions were given on estimation of the clearness index by using a neural network which uses meteorological information such as air temperatures and precipitation probabilities as inputs. Using multiple number of meteorological forecast information simultaneously has reduced the average square error to 49% of that using only the weather forecast. The estimation accuracy depends on the accuracy of meteorological forecast, but using multiple number of forecast information can improve the accuracy. 6 refs., 7 figs., 1 tab.

  13. Simulation study on single family house with solar floor and domestic hot water heating system by EESLISM; EESLISM ni yoru taiyonetsu danbo kyuto jutaku no simulation

    Energy Technology Data Exchange (ETDEWEB)

    Roh, H; Udagawa, M [Kogakuin University, Tokyo (Japan)

    1997-11-25

    Indoor thermal conditions and energy performance were simulated, by the aid of EESLISM as a common simulation program for indoor thermal conditions and energy systems, for an actual two-storied single family house equipped with solar-heated floors and a domestic hot water (DHW) heating system, in order to investigate applicability of the simulation program. The house, built in Shibuya Ward in Tokyo, has a total floor area of 164m{sup 2}, with a living room, dining room and study heated by the solar system for a total floor area of 35m{sup 2}. A heat-storage tank is provided, dedicated to the DHW system. The solar collector is of flat type, with selectively light-absorbing planes, having a total collector area of 11.46m{sup 2}. The operating conditions of the floor-heating and DHW systems are almost reproduced. It is necessary to take surrounding conditions into consideration; solar radiation in daytime will be overestimated if adjacent buildings are neglected to give higher temperature in the space and on the wall on the south than the observed level. 6 refs., 5 figs., 1 tab.

  14. Assessment of global environmental impacts by utilizing methodology of LCA on solar water heater for dwellings; LCA shuho ni yoru taiyonetsu onsuiki no kankyo fuka hyoka

    Energy Technology Data Exchange (ETDEWEB)

    Kamoshida, J [Shibaura Institute of Technology, Tokyo (Japan); Asai, S [Yazaki Corp., Tokyo (Japan)

    1997-11-25

    CO2 emission was quantified through the life cycle of a solar water heater to assess its environment impact. Although LCA (life cycle assessment) originally sums up I/O of all materials and energy through the whole life cycle of a product to examine environment impact, this assessment was carried out for only CO2. Calculation of CO2 emission assumed a natural circulating solar water heater of 200 l in effective hot water capacity, 2.78m{sup 2} in effective collecting area, and 0.5 in average annual collecting efficiency of total solar radiation, and an auxiliary city gas heat source for compensating insufficient heat quantity. The total CO2 emission in the life cycle of a solar water heater was obtained from an industrial association table assuming the life cycles of 10 and 20 years. CO2 emission was estimated to be 5407.1kg-CO2 and 10665.2kg-CO2 for 10 and 20 years, respectively. CO2 emission due to city gas was largest in the total CO2 emission in the life cycle. As a result, for reduction of CO2 emission due to a solar water heater, improvement of equipment efficiency was most important. 6 refs., 5 figs., 3 tabs.

  15. Characteristic on photovoltaic/thermal hybrid collector. Evaluation of excergetic theory; Taiyoko netsu hybrid collector no tokusei. Exergy ni yoru hyoka

    Energy Technology Data Exchange (ETDEWEB)

    Iwawaki, H; Morita, Y; Fujisawa, T; Tani, T [Science University of Tokyo, Tokyo (Japan)

    1997-11-25

    Described herein are characteristics of photovoltaic (PV)/thermal hybrid collectors (PV/Ts), in which a PV module is combined with a plate-shape solar heat collector to simultaneously produce electric power and heat. Their efficiency is assessed by exergy. The test results indicate that the PV/T system gives a 1.07 times higher exergy than the PV system, 86.3 versus 80.7kWh. In terms of energy, the optimum values (OVs) are 5, 44 and 37% lower than the measuring values (MVs) for electrical energy, thermal energy and total exergy. In terms of exergy, on the other hand, OV is 5% lower than MV for electrical energy, but 893 times higher for thermal energy and 1.26 times higher for total exergy. As a result, the exergy level is 26% higher than that of a system which generates power as the main product and heat as the auxiliary product. 3 refs., 6 figs., 5 tabs.

  16. Inversion of Love wave phase velocity using smoothness-constrained least-squares technique; Heikatsuka seiyakutsuki saisho jijoho ni yoru love ha iso sokudo no inversion

    Energy Technology Data Exchange (ETDEWEB)

    Kawamura, S [Nippon Geophysical Prospecting Co. Ltd., Tokyo (Japan)

    1996-10-01

    Smoothness-constrained least-squares technique with ABIC minimization was applied to the inversion of phase velocity of surface waves during geophysical exploration, to confirm its usefulness. Since this study aimed mainly at the applicability of the technique, Love wave was used which is easier to treat theoretically than Rayleigh wave. Stable successive approximation solutions could be obtained by the repeated improvement of velocity model of S-wave, and an objective model with high reliability could be determined. While, for the inversion with simple minimization of the residuals squares sum, stable solutions could be obtained by the repeated improvement, but the judgment of convergence was very hard due to the smoothness-constraint, which might make the obtained model in a state of over-fitting. In this study, Love wave was used to examine the applicability of the smoothness-constrained least-squares technique with ABIC minimization. Applicability of this to Rayleigh wave will be investigated. 8 refs.

  17. Laboratory investigation on streaming potential for sandy soil and weathered rock; Shitsunai jikken ni yoru sashitsu jiban oyobi fuka ganban no ryudo den`i no kento

    Energy Technology Data Exchange (ETDEWEB)

    Sato, H; Shima, H [OYO Corp., Tokyo (Japan)

    1996-10-01

    Laboratory experiment on sandy soil and weathered rock was conducted to clarify the generation mechanism of streaming potential due to underground fluid. Streaming potential is caused by underground fluid flow, namely by fluid flow in porous substances as electrokinetic phenomenon. In experiment, Inagi sand, Toyoura sand and strongly decomposed weathered granite were used. In Inagi and Toyoura sands, positive streaming potential was observed downstream in fluid flow. Streaming potential could be nearly determined as primary function of fluid velocity, and generated streaming potential increased with fluid resistivity. Streaming potential was higher in Inagi sand than Toyoura sand, probably depending on hydraulic radius, size of bleeding channel, and conductivity of sand surface. In weathered granite, negative streaming potential was measured. In the case of positive {zeta} potential, negative streaming potential is theoretically generated downstream in fluid flow. This experiment suggested possible generation of negative streaming potential in some kinds of ground. 2 refs., 6 figs., 1 tab.

  18. Resistance test of high-speed ship by means of attitude control method. Part 2; Shisei seigyo hoshiki ni yoru kosokutei no teiko shiken. 2

    Energy Technology Data Exchange (ETDEWEB)

    Hayashida, S [Nagasaki Institute of Applied Science, Nagasaki (Japan)

    1996-04-10

    The previous paper has proposed a resistance test method by controlling the attitude of a high-speed model ship using a personal computer without making a data base. For this method, the fluid force acting on the hull of model ship is measured, to change its attitude based on the measurement, and then, the fluid force is measured again, to change the attitude again. The traveling attitude is created by repeating this, to measure the force acting on the hull. Since the attitude is changed by calculating using the fluid force measured, various factors can be considered in the calculation process. For example, a test with an arbitrary displacement in an arbitrary position of center of gravity can be conducted in spite of actual displacement and position of center of gravity of the model ship. A test for a high-speed ship was conducted through this method, to obtain nearly satisfactory results compared with a usual resistance test. Occasionally, a lot of repetitions were required to satisfy the balancing condition of the force. In this study, the improvement of testing efficiency has been planned by modifying the analyzing program. 5 refs., 7 figs., 1 tab.

  19. Computational study on full-wave inversion based on the acoustic wave-equation; Onkyoha hado hoteishiki full wave inversion no model keisan ni yoru kento

    Energy Technology Data Exchange (ETDEWEB)

    Watanabe, T; Sassa, K [Kyoto University, Kyoto (Japan); Uesaka, S [Kyoto University, Kyoto (Japan). Faculty of Engineering

    1996-10-01

    The effect of initial models on full-wave inversion (FWI) analysis based on acoustic wave-equation was studied for elastic wave tomography of underground structures. At present, travel time inversion using initial motion travel time is generally used, and inverse analysis is conducted using the concept `ray,` assuming very high wave frequency. Although this method can derive stable solutions relatively unaffected by initial model, it uses only the data of initial motion travel time. FWI calculates theoretical waveform at each receiver using all of observed waveforms as data by wave equation modeling where 2-D underground structure is calculated by difference calculus under the assumption that wave propagation is described by wave equation of P wave. Although it is a weak point that FWI is easily affected by noises in an initial model and data, it is featured by high resolution of solutions. This method offers very excellent convergence as a proper initial model is used, resulting in sufficient performance, however, it is strongly affected by initial model. 2 refs., 7 figs., 1 tab.

  20. Three dimensional numerical modeling for ground penetrating radar using finite difference time domain (FDTD) method; Jikan ryoiki yugen sabunho ni yoru chika radar no sanjigen suchi modeling

    Energy Technology Data Exchange (ETDEWEB)

    Sanada, Y; Ashida, Y; Sassa, K [Kyoto University, Kyoto (Japan)

    1996-10-01

    3-D numerical modeling by FDTD method was studied for ground penetrating radar. Radar radiates electromagnetic wave, and determines the existence and distance of objects by reflection wave. Ground penetrating radar uses the above functions for underground surveys, however, its resolution and velocity analysis accuracy are problems. In particular, propagation characteristics of electromagnetic wave in media such as heterogeneous and anisotropic soil and rock are essential. The behavior of electromagnetic wave in the ground could be precisely reproduced by 3-D numerical modeling using FDTD method. FDTD method makes precise analysis in time domain and electric and magnetic fields possible by sequentially calculating the difference equation of Maxwell`s equation. Because of the high calculation efficiency of FDTD method, more precise complicated analysis can be expected by using the latest advanced computers. The numerical model and calculation example are illustrated for surface type electromagnetic pulse ground penetrating radar assuming the survey of steel pipes of 1m deep. 4 refs., 3 figs., 1 tab.

  1. Three dimensional transient electromagnetic model study for fracture prediction from tunnel face; Sanjigen model keisan ni yoru TEM ho no tunnel zenpo tansa eno tekiyosei no kento

    Energy Technology Data Exchange (ETDEWEB)

    Wada, K; Tsutsui, T; Saito, A [Mitsui Mineral Development Engineering Co. Ltd., Tokyo (Japan); Hara, T [Toda Corp., Tokyo, (Japan); Zhdanov, M [University of Utah, UT (United States)

    1996-10-01

    In order to apply TEM model to fracture prediction at tunnel face, 3-D TEM model computation by FEM was conducted by installing a transmission loop on a tunnel face. MT field responses diffusing into the 3-D model were computed by time-domain difference calculus, and analytical precision was improved by introducing a staggered grid method. In the case where a low resistive zone exists before a tunnel face, time variance in diffused eddy current and induction current in the low resistive zone could be obtained. The difference in tunnel-axial transient curve (transient phenomenon curve in magnetic field) between uniform medium and low resistive zone models was based on the absorption process of diffused eddy current into the low resistive zone, and the expanding process of it toward the outside. Change in background condition could be predicted from the background and the ratio of transient curves every measurement. The detection limit of the low resistive zone was dependent on resistivity contrast, distance and geometry. Fluctuation in measurement due to noises and S/N ratio were also essential. 3 refs., 10 figs.

  2. Destratification efficiency by hypolimnitic water lifter with air bullets. Kihodan wo mochiita shinsosui yosui shisetsu ni yoru mitsudo seiso no kongo koritsu

    Energy Technology Data Exchange (ETDEWEB)

    Ikeda, H; Suga, K [Utsunomiya University, Tochigi (Japan). Faculty of Engineering; Asaeda, T [Saitama University, Saitama (Japan). Faculty of Engineering

    1994-02-21

    The intermittent aeration and circulation method is used frequently to destruct temperature stratification in a reservoir to prevent it from eutrophication. This method uses a cylinder erected in water, into which air bullets are shot out intermittently to circulate and mix heavier water mass upward. The present study has performed numerical analysis on the process to mix density stratifications by operating an intermittent water lifter cylinder for an extended period of time, and discussed responses of each factor to variation. The numerical computation has been carried out according to the equation of motion for water and air in the water lifter cylinder, and the numerical model that hypothesizes the double plume after air bubbles have departed from the water lifter cylinder. The result indicated that the amount of hypolimnitic water lifted against the amount of air injected can be expressed by an empirical formula that uses only the relative air bullet volumes. An evaluation formula for the water lifting efficiency has also been derived. It has been found for the stratification mixing that trends in the mixing efficiency can be identified by two parameters of dimensionless air bubble amount and stratification strength. 17 refs., 11 figs., 4 tabs.

  3. Development of the anomaly diagnosis system for transformers using trace constituents in oil; Yuchu biryo seibun ni yoru hen`atsuki ijo shindan hoho no kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    Ono, H.; Ono, S. [Chugoku Electric Power Co. Inc., Hiroshima (Japan)

    1997-03-21

    In order to complement an anomaly diagnosis system by analysis of gases in oil for transformers, the analysis/diagnosis method of trace constituents in oil was developed. Liquid-liquid solvent extraction using methanol aqueous solution as extract, and high-speed liquid chromatography were adopted to analyze decomposed products dissolved into oil by over heating as trace constituents. The relation between over heat temperature and the amount of decomposed products by over heating was studied by simulation experiment of over heat anomaly. The detectable duration of anomaly after its generation was also studied by examining the adsorption phenomenon of the thermal decomposed products onto insulating materials. As a result, the criterion of the analysis/diagnosis method was prepared by using 5-hydroxymethylfurfural as index constituent of over heating anomaly. Although furfural was also effective as index constituent, it was excluded from the index constituent because furfural is formed by deterioration of transformers even during normal operation. 2 refs., 19 figs., 7 tabs.

  4. Diagnosis by acetone for deterioration of breathing transformers containing an adsorbent in the insulating oil; Acetone ni yoru kyuchakuzai iri kaihogata hen`atsuki no keinen rekkado shindan

    Energy Technology Data Exchange (ETDEWEB)

    Awata, M.; Mizuno, K.; Ueda, T. [Chubu Electric Power Co. Ltd., Nagoya (Japan); Ota, N.; Ishii, T.; Tsukioka, H.

    1997-04-20

    The high-precision diagnosis for deterioration of a breathing transformer containing an adsorbent was investigated. An adsorbent (activated alumina) may be contained in oil to eliminate the deterioration product in insulating oil or the moisture. In this case, the deterioration component furfural in insulating paper is adsorbed. The concentration in furfural oil cannot be thus used for deterioration diagnosis. Acetone and furan with good relation between the adsorption characteristics for activated alumina and the insulating paper deterioration in an accelerated deterioration test can be effectively used as a new deterioration index component of insulating paper. The disassembly survey showed that acetone is valid as the index component of deterioration diagnosis. Furan is not detected in a breathing transformer, but effective in diaphragm-type and nitrogen-sealed transformers. The adsorption of acetone by activated alumina requires no correction for the change in oil temperature at about 10{degree}C. The solubility of acetone for insulating oil is 60 times at 20{degree}C as high as CO2, and the discharge rate from a breather is little (1/25). Therefore, acetone is much more excellent than CO2 as the precision of a deterioration index. 21 refs., 15 figs., 4 tabs.

  5. Cavity detection based on EM migration of TEM data; TEM ho data no denji migration ni yoru kudo kenshutsu no kokoromi

    Energy Technology Data Exchange (ETDEWEB)

    Shiga, N; Wada, K; Tsutsui, T [Mitsui Mineral Development Engineering Co. Ltd., Tokyo (Japan); Hara, T [Toda Corp., Tokyo (Japan)

    1997-05-27

    With an objective to discuss applicability of resistivity imaging using electromagnetic migration to detection of underground cavity, an applicability test was carried out on calculation of a numerical model and measurement data. By using the numerical model, a calculation was performed on a hypothetical case that a cubic cavity with sides each at 40 m exists in a homogenous medium of 200 ohm-m, with the cavity top located 20 m below the ground surface. As a result, it was possible to structure in a very short calculation time an image of the cavity which cannot be identified by one-dimensional inverse analysis. In the case of this cavity, a center of the image was structured on its lower face. It was shown that a location to indicate the image must be changed according to difference in the measurement locations. In a test on data measured in an underground cavity in the city of Utsunomiya, Tochigi Prefecture, it was found that the result may vary largely depending on structure of the background necessary for migration. Referring to a result of measurement performed in a location in which no target has been set can provide a good result. 5 refs., 7 figs., 1 tab.

  6. Geoelectrical structure by electrical logs and Schlumberger sounding at the Akinomiya geothermal field, Akita Prefecture; Denki kenso oyobi Schlumberger ho ni yoru Akinomiya chinetsu chiiki no hiteiko kozo

    Energy Technology Data Exchange (ETDEWEB)

    Kajiwara, T; Takemoto, S

    1997-05-27

    Based on the electrical logging data of the existed well and Schlumberger sounding data obtained in 1974, a two-dimensional inversion analysis of the specific resistance profile was conducted at the Akinomiya geothermal field, Akita Prefecture. From the electrical logging data, relationships between the geology and the specific resistance were illustrated. The specific resistance values of basement rocks showed more than 100 ohm-m, which were higher than those of the other seams. Intrusive rocks and tuffs in the basement rocks showed locally low values less than 100 ohm-m. Younger volcanic rocks showed low values around 10 ohm-m. As a result of the two-dimensional inversion analysis, the basement rocks could be detected as high specific resistance layers. Accordingly, it was considered that the basement rocks in this field can be detected as high specific resistance layers by analyzing the results of field survey sufficiently. Low specific resistance zones were observed in the shallow depth, which corresponded to the fumarolic gases. There were some layers with remarkably varied specific resistance values, which were considered to be related with alteration. 6 refs., 3 figs.

  7. Development of micro capacitive accelerometer for subsurface microseismic measurement; Micromachining ni yoru chika danseiha kenshutsu no tame no silicon yoryogata kasokudo sensor no seisaku

    Energy Technology Data Exchange (ETDEWEB)

    Nishizawa, M; Niitsuma, H; Esashi, M [Tohoku University, Sendai (Japan). Faculty of Engineering

    1997-05-27

    A silicon capacitive accelerometer was fabricated to detect subsurface elastic waves by using micromachining technology. Characteristics required for it call for capability of detecting acceleration with amplitudes from 0.1 to 1 gal and flat amplitude characteristics in frequency bands of 10 Hz to several kHz. For the purpose of measuring transition phenomena, linear phase characteristics in the required bands must be guaranteed, cross sensitivity must be small, and resistance to water, pressure and heat is demanded. Sensitivity of the sensor is determined finally by noise level in a detection circuit. The sensor`s minimum detection capability was 40 mgal in the case of the distance between a weight and an electrode being 3 {mu}m. This specification value is a value realizable by the current micromachining technology. Dimensions for the weight and other members were decided with the natural frequency to make band width 2 kHz set to 4 kHz. Completion of the product has not been achieved yet, however, because of a problem that the weight gets stuck on the electrode plate in anode bonding in the assembly process. 7 refs., 5 figs., 1 tab.

  8. Three dimensional numerical modeling for investigation of fracture zone filled with water by borehole radar; Borehole radar ni yoru gansui hasaitai kenshutsu no sanjigen suchi modeling

    Energy Technology Data Exchange (ETDEWEB)

    Sanada, Y; Watanabe, T; Ashida, Y [Kyoto University, Kyoto (Japan); Hasegawa, K; Yabuuchi, S [Power Reactor and Nuclear Fuel Development Corp., Tokyo (Japan)

    1997-05-27

    Water bearing fracture zones existing in rock mass largely influence the underground water flow and dynamic property of rock mass. The detailed survey of the location and size of water bearing fracture zones is an important task in the fields such as civil engineering, environment and disaster prevention. Electromagnetic waves of high frequency zones can be grasped as a wave phenomenon, and the record obtained in the actual measurement is wave forms of time series. In the exploration using borehole radar, this water bearing fracture zone becomes the reflection surface, and also becomes a factor of damping in the transmitted wave. By examining changes which these give to the observed wave forms, therefore, water bearing fracture zones can be detected. This study made three dimensional numerical modeling using the time domain finite difference method, and obtained the same output as the observed wave form obtained using borehole radar. By using this program and changing each of the parameters such as frequency and resistivity in the homogeneous medium, changes of the wave forms were observed. Further, examples were shown of modeling of detection of water bearing fracture zones. 5 refs., 16 figs., 1 tab.

  9. Archaeological prospecting using electrical resistivity method. Case history of Kaibukiyama ancient tomb; Denki tansaho ni yoru iseki tansa. Kaibukiyama kofun no chosarei

    Energy Technology Data Exchange (ETDEWEB)

    Mizunaga, H; Ushijima, K; Kishikawa, H [Kyushu University, Fukuoka (Japan). Faculty of Engineering

    1997-05-27

    To grasp the three-dimensional structure of ancient tomb during the archaeological prospecting of Kaibukiyama ancient tomb, various electrical resistivity methods were tried. For the survey, firstly, in order to clarify the electrical resistivity structure of rear circular part of ancient tomb, roughly, mapping was conducted by means of two-electrode method using a multi-channel measuring system. Then, the vertical prospecting was conducted densely with a mesh form having VES intervals of 2 m as a detailed survey by means of Schlumberger method. For the three-dimensional inverse analysis of apparent electrical resistivity data by the two-electrode method, a program with high calculation speed was developed by using algorithm where Jacobian with a homogeneous model is adopted for the Jacobian calculation. As a result of the analysis, an outline of underground 3-D resistivity structure was determined. The resistivity anomaly with high values obtained from the results of 2-D inverse analysis of VES curve by means of Schlumberger method agreed well with the central part of the ancient tomb, which was confirmed during the archaeological survey. 4 refs., 8 figs.

  10. Recognition and detection of seismic phases by artificial neural network detector; Jinko neural network ni yoru jishinha no ninshiki to kenshutsu

    Energy Technology Data Exchange (ETDEWEB)

    Yamazaki, K; Wang, W [Tokyo Gakugei University, Tokyo (Japan)

    1997-05-27

    Initial parts of P-waves, medium or high in intensity, are detected using an artificial neural network (ANN). The ANN is the generic name given to information processing systems of the non-Neumann type configured to human brain in point of information processing function, and is packaged into computers in the form of software capable of parallel processing, self-organizing, learning, etc. In this paper, a hierarchical ANN-assisted seismic motion recognition system is constructed on the basis of an error reverse propagation algorithm. It is reported here, with a remark that this study wants much more data from tests for the evaluation of the quality of the recognition, that P-wave recognition has been achieved. When this technique is applied to the S-wave, much more real-time information will become available. For the improvement of the system, a number of problems have to be solved, including the establishment of automatic refurbishment through adaptation-and-learning and configuration that incorporates frequency-related matters. It is found that this system is effective in seismic wave phase recognition but that it is not suitable for precision measurement. 7 refs., 4 figs.

  11. Laboratory study on streaming potential for exploring underground water flow; Shitsunai jikken ni yoru ryudo den`i wo mochiita mizu michi tansa no kanosei no kento

    Energy Technology Data Exchange (ETDEWEB)

    Sato, H; Shima, H [Oyo Corp., Tokyo (Japan)

    1997-05-27

    To investigate a possibility of exploration of underground water flow as well as to grasp the underground fluid flow by measuring streaming potential at the ground surface, some experiments were conducted using a model unit by considering the difference of permeability. For this experimental unit, water is driven by adding head difference between the polyethylene vessel filled with water and the experimental water tank. The size of water tank is 350{times}160 mm with a height of 160 mm. Twenty platinum electrodes are set on the cover of water tank. Toyoura standard sand and Kanto loam were used for the experiments. For the experiments, fluid was injected in various combined models by considering the permeability, to measure the streaming potential. As a result, it was explained by the streaming potential that the fluid flows in a form of laminar flow in the experimental water tank, and that the movement of fluid in the Kanto loam is quite slow. It was also confirmed that the streaming potential method is an effective technique for grasping the movement of fluid. 3 refs., 8 figs.

  12. Case study of geostructural prospect of a tunnel by using geophysical methods; Butsuri tansa ni yoru tunnel chisan yosoku to jissai

    Energy Technology Data Exchange (ETDEWEB)

    Ueda, H [Japan Railway Construction Public Corp., Tokyo (Japan); Kawakami, J [Taisei Construction Corp., Tokyo (Japan); Nagasue, I; Hiwatashi, S; Wakuno, M [Oyo Corp., Tokyo (Japan)

    1997-05-27

    A preliminary survey was carried out by combining elastic wave exploration (using a refraction method) and electrical exploration (using a resistivity imaging method) on a long tunnel planned in a granite distributed area. This paper describes a case of verifying geological condition in the area by using a trial survey well and horizontal boring. This tunnel goes through the Seburi mountainous area on the border of Fukuoka Prefecture and Saga Prefecture for a total distance of 12 km. The refraction method and the resistivity imaging method were selected from the necessity of identifying the weathering condition in natural ground, and distributions of fault crush zones and underground water in a section extending 560 m from the well entrance. As a result of comparing the natural ground condition interpreted from the geophysical survey results with the construction records, the fault was detected as a cracked or deformed section in the part where the resistivity value changes abruptly or where the resistivity is low. The tunnel natural ground classification showed a good correspondence with the elastic wave velocities. The largest flooding section showed a good agreement with the section where the resistivity changes suddenly to a lateral direction. Thus, the geological information interpreted from both surveys presented a good correspondence with the construction records, leading to a judgment that the prediction is possible. 3 refs., 4 figs., 5 tabs.

  13. Computational study on full-wave inversion based on the elastic wave-equation; Dansei hado hoteishiki full wave inversion no model keisan ni yoru kento

    Energy Technology Data Exchange (ETDEWEB)

    Uesaka, S [Kyoto University, Kyoto (Japan). Faculty of Engineering; Watanabe, T; Sassa, K [Kyoto University, Kyoto (Japan)

    1997-05-27

    Algorithm is constructed and a program developed for a full-wave inversion (FWI) method utilizing the elastic wave equation in seismic exploration. The FWI method is a method for obtaining a physical property distribution using the whole observed waveforms as the data. It is capable of high resolution which is several times smaller than the wavelength since it can handle such phenomena as wave reflection and dispersion. The method for determining the P-wave velocity structure by use of the acoustic wave equation does not provide information about the S-wave velocity since it does not consider S-waves or converted waves. In an analysis using the elastic wave equation, on the other hand, not only P-wave data but also S-wave data can be utilized. In this report, under such circumstances, an inverse analysis algorithm is constructed on the basis of the elastic wave equation, and a basic program is developed. On the basis of the methods of Mora and of Luo and Schuster, the correction factors for P-wave and S-wave velocities are formulated directly from the elastic wave equation. Computations are performed and the effects of the hypocenter frequency and vibration transmission direction are examined. 6 refs., 8 figs.

  14. Fault detection by Turam TEM survey. Numerical model studies and a case history; TEM ho Turam sokutei haichi ni yoru danso kenshutsu no kokoromi. Model keisan to jisshirei

    Energy Technology Data Exchange (ETDEWEB)

    Wada, K; Tsutsui, T [Mitsui Mineral Development Engineering Co. Ltd., Tokyo (Japan); Ito, T [Chiba Univ., Chiba (Japan). Faculty of Science; Takeuchi, A [Toyama University, Toyama (Japan). Faculty of Science; He, P [Power Reactor and Nuclear fuel Development Corp., Tokyo (Japan)

    1997-05-27

    With an objective to detect faults estimated to exist along the Shigesumi valley in the Kamioka mine, discussions were given by using electromagnetic survey, which uses the Turam measurement arrangement based on the TEM method, and three-dimensional model calculations. The Turam measurement arrangement, which installs transmission loop fixedly, is used to identify nature and distribution of electrically conductive objects upon noticing abnormal portions in magnetic fields in the measurement data. In the model calculation, the plate model calculation method and the FDTD method were used, and so was the calculation code TEM3DL. The result revealed that strong topographical influence is seen from steep V-shaped valley existing along the traverse line in the measurement data, but an abnormal resistivity band accompanying remarkable distortion in the curve was detected. According to the result of the model calculation, anomaly detection may be found difficult in locations where a low resistivity band has not grown enough locally. It was possible from these facts to assume a model in which the low resistivity band exists directly below the Shigesumi valley, suggesting existence of faults. 2 refs., 8 figs.

  15. Nodal head method with matric operation in analysis of mine ventilation networks. Matrics kaiho wo mochiita setten ho ni yoru tsuki mo kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Sasaki, K.; Miyakoshi, H. (Akita Univ., Akita (Japan). Mining College); Kinoshita, H.; Onozuka, T. (Hanaoka Mining Co. Ltd., Akita (Japan))

    1990-09-25

    In this report, the method of analyzing mine ventilation networks is explained in which the direct matric operation method is applied to the solution of the linear equation system introduced from the fundamental equation of the nodal head method. In other words, the fundamental equation was expressed by genelarized equation composition by using connecting functions between nodes and the algorism of a computer program was clarified. And the calculation method necessary for other ventilation netwrks analysis was shown in a concrete form. For solving the linear equation system, the matric operation method based on the modified Choleski's method was used in order to speed up the calculation and stabilize the convergence process of the solution. As examples, calculation was made on the ventilation networks of total numbers of the nodes of 8, 14, 51 and 141. From these ventilation network analyses, using a linear equation system concerning the nodal pressure correction, it was found that in the system with convergence acceleration coefficient of 1.4, the number of sequential repeating frequency of approximation Mc which was required for convergence was in the order of Mc {approx equal} 13 (cycle) for the condition that the fan pressure was constant and the convergence condition was {vert bar} AQi {vert bar}{sub max} {lt} 0.1m {sup 3}/min. 14 refs., 12 figs., 3 tabs.

  16. Evaluation of flux-trapping and magneto-resistibility of superconductors by ESR spectroscopy; ESR ho ni yoru chodendotai no jisoku hosoku to taijiba tokusei no hyoka

    Energy Technology Data Exchange (ETDEWEB)

    Kusumori, T; Matsuura, K; Muto, H [National Industrial Research Institute of Nagoya, Nagoya (Japan)

    1995-09-28

    The abnormal sisal, which was observed in the ESR measurement of superconductors, was confirmed to be a non-ESR (non resonant) signal, from an ESR experiment applying parallel and vertically polarized microwave fields and from the calculation of the ESR transition probabilities. The field modulation dependence of the spectra revealed that the signal was composed of two components. From the modulation-scheme analysis and a study of type I and II superconductors, two components were assigned to the microwave responses to magnetizations trapped in the crystalline portion and at intergranular Josephson junctions. The former B and the batter J components are observed in the first derivative and absorption a form, respectively, and their polarities differently behave for the field sweep reversal. Based on these results, we have improved an ESR spectrometer, which makes it possible to measure separately two kinds of magnetization and to study the trapping ability and quantum flux. 11 refs., 12 figs., 1 tab.

  17. Thermochemical recuperative combined cycle with methane-steam reforming combustion; Tennengasu kaishitsu nensho ni yoru konbaindo saikuru hatsuden no kokoritsuka oyobi denryoku fuka heijunka taio

    Energy Technology Data Exchange (ETDEWEB)

    Kikuchi, R.; Essaki, K.; Tsutsumi, A. [The University of Tokyo, Tokyo (Japan). Dept. of Chemical System Engineering; Kaganoi, S.; Kurimura, H. [Teikoku Sekiyu Co., Tokyo (Japan); Sasaki, T.; Ogawa, T. [Toshiba Co., Tokyo (Japan)

    2000-03-10

    Thermochemical recuperative combined cycles with methane-steam reforming are proposed for improving their thermal efficiency and for peak-load leveling. For targeting higher thermal efficiency, a cycle with methane-steam reforming reaction heated by gas turbine exhaust was analyzed. The inlet temperature of gas turbine was set at 1,350 degree C. Low-pressure steam extracted from a steam turbine is mixed with methane, and then this mixture is heated by part of the gas turbine exhaust to promote a reforming reaction. The rest of the exhaust heat is used to produce steam, which drives steam turbines to generate electricity. The effect of steam-to-methane ratio (S/C) on thermal efficiency of the cycle, as well as on methane conversion, is investigated by using the ASPEN Plus process simulator. The methane feed rate was fixed at constant and S/C ratio was varied from 2.25 to 4.75. Methane conversion shows an increasing trend toward the ratio and has a maximum value of 17.9 % at S/C=4.0. Thermal efficiency for the system is about 51 % higher than that calculated for a conventional 1,300 degree C class combined cycle under similar conditions. A thermochemical recuperative combined cycle is designed for peak-load leveling. In night-time operation from 20 : 00 to 8 : 00 it stores hydrogen produced by methane steam reforming at S/C=3.9 to save power generation. The gas turbine inlet temperature is 1,330 degree C. In daytime operation from 8 : 00 to 20 : 00 the chemically recuperated combined cycle operated at S/C=2.0 is driven by the mixture of a combined cycle operated at constant load with the same methane feed rate, whereas daytime operation generated power 1.26 times larger than that of the combined cycle. (author)

  18. FY1995 report on the analyses of functional living systems using magnetic stimulation and magnetic fields; 1995 nendo jiki shigeki oyobi kyojiba ni yoru seitai kino kaimei

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-05-01

    The purpose of the project is to widen the understanding of the biological effects o magnetic fields and to search potential applications of biomagnetics to medical diagnosis and treatments. We developed a method of localized magnetic stimulation of the brain. By concentrating induced eddy currents on a target with a pair of opposing pulsed magnetic fields produced by a figure-eight coil, they were able to stimulate the human cortex within a 5 mm resolution. We studied the properties of diamagnetic water in static magnetic fields. The phenomenon that the surface of the water was pushed back by magnetic fields of higher gradients was observed. The behavior of oxygen dissolved in an aqueous solution under magnetic fields of up to 8T with a gradient of 50T/m was studied. For oxygen concentrations greater than 11 mg/l, a clear redistribution of dissolved oxygen was observed. Effects of strong magnetic fields on a process of dissolution of fibrin clots was studied. Fibrin polymers in water magneto-phoresically drifted in the direction of increasing magnetic fields, and dissolution of fibrin polymers by plasmin was accelerated. (NEDO)

  19. Buckling collapse analysis of framed structures by using adaptively shifted integration technique. Junnogata shifted intergration ho ni yoru honegumi kozo no zakutsu hokai kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Toi, Y.; Isobe, D. (The University of Tokyo, Tokyo (Japan). Institute of Industrial Science)

    1993-09-01

    This paper describes the following matters on application of an adaptively shifted integration technique to a buckling collapse analysis of framed structures: This method is a method in a finite element analysis using three-dimensional girder elements to arrange value integration points at optimal locations in a linear analysis if the elements are in an elastic transform condition on the whole. The method then moves the value integration points so that plastic hinge will occur in these locations immediately after part of the elements has yielded. The method was applied to analyzing an elastic buckling problem in several loading patterns for either a both-end supported or a one-end fixed beam member. A result was obtained that a number of elements required for one member is four at minimum. In a buckling analysis of framed structures, a satisfactory result was obtained by using an automatic element segmenting algorithm, which begins the analysis with one element one member, and immediately after a member is determined with a possibility of generation of buckling, splits that member only into four elements. 6 refs., 5 figs.

  20. Improvement of D.I. diesel engine combustion using numerical simulation; Chokufun diesel kikan no nensho kaizen shuho. Suchi kaiseki ni yoru torikumi

    Energy Technology Data Exchange (ETDEWEB)

    Minami, T.; Adachi, T.; Isyii, Y. [Isuzu Motors Ltd., Tokyo (Japan)

    1999-04-01

    For the purpose of improving DI diesel engine combustion, it is important to predict air flow of intake and exhaust manifold, intake port flow, combustion chamber swirl and fuel spray combustion. This paper describes the application of numerical simulation to the engines, the analysis of phenomena and a problem of simulation model modification. (author)

  1. Application of monolithic lining to tundish and extension of tundish life with improvement of refractories; Tandeisshu futeiseika to taikabutsu kaizen ni yoru jumyo kojo

    Energy Technology Data Exchange (ETDEWEB)

    Mori, Eiichiro; Fujta, Takashi; Tanikawa, Kanji [Kobe Steel Corp., Hyogo (Japan)

    1999-06-01

    As a part of realization of monolithic liming of a tundish lining refractory, a study on 2CC and 3CC tundish monolithic refractories was carried out to improve placing efficiency and extend its life. Main inspection points were set on (1) casting facility specifications and (2) structure and material. A force feeding pump system with a high degree of freedom for placing layout was selected. It was judged preferable than a hopper dolly type ladle repair facility in the degree of freedom for a placing site and facility expenses, though little inferior at maintenance. A force feeding pump is combined with a boom to enable the facility to cast for plural objects. Low expansion and creep properties were given to the refractory by reviewing the addition of the expansive material and the structure was improved by setting anchor blocks at corner parts. The cost of refractories was reduced and labor saving of refractory placing workers was achieved by widely extending the life. (NEDO)

  2. Life prolongation and cost reduction of steel ladles with improving refractories and their structure; Taikabutsu zaishitsu to kozo kaizen ni yoru shuka taikabutsu no chojumyoka to kosuto teigen

    Energy Technology Data Exchange (ETDEWEB)

    Nakai, Masato; Kasahara, Hajime; Fukutani, Fujio; Imai, Hiroyuki [Nippon Steel Corp., Tokyo (Japan)

    1999-06-01

    Steel Making Plant, Hirohata Iron Works, Nippon Steel Corp. succeeded to reduce the cost of furnace materials by measures described below down to 49% compared to that in 1992. (1) For tuyre bricks, cleanability against oxygen was improved by compacting by vacuum cast forming. (2) For SL bricks, the cost was reduced by applying imported bricks and optimization of the range of use. (3) For alumina-magnesia amorphous refractories for side walls, low expansion and breaking resistance were improved by optimization of magnesia quantity and silica ultra fine powder quantity. (4) For side wall structure, improvement of tie-in between the ground part and the side wall and lining with efficient thickness were carried out. (NEDO)

  3. Improvement of efficiency by proportional and integral control for compact boiler; Shoyoryo boiler no renzoku seigyo (P.I seigyo) ni yoru seino kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Yanagida, T. [Kawasaki Thermal Engineering Co. Ltd., Shiga (Japan)

    1998-10-01

    Efficiency of a compact boiler is improved by the introduction of a continuous P.I. control. It is controlled by the following procedure. The proportional control, which controls magnitude of combustion in proportion to a load requirement, is combined with an integral control function which keeps steam pressure at a given level, in order to stabilize steam pressure at a level comparable to that of a large, water-tube type boiler. A stable steam pressure is realized by including control of make-up water supply, to minimize the effects of water supply on steam pressure. The effects of characteristics of the combustion valve on control are relaxed by programming. In addition to the above, rotational speed of the motor for the forced draft fan is controlled for each load level, to reduce power consumption. These bring improved quality of steam, i.e., stabilized steam pressure, improved follow-up characteristics of the steam and secured dryness of the steam. Energy-saving is also achieved, i.e., reduction of noise and power consumption at a low combustion load are achieved by improved real boiler efficiency and inverter-aided control of the forced draft fan. Low-NOx burners are adopted, to abate NOx content to 60ppm or less at any load. 16 figs.

  4. Adaptive feedforward control for improving output power response of CO2 laser; Tekiogata feedforward ni yoru laser shutsuryoku oto no kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Imai, Y.; Takahashi, t.; Morita, A. [Mitsubishi Electric Corp., Tokyo (Japan)

    1998-03-31

    Feedback control has been used to stabilize the steady-state output power of a CO2 laser to overcome the problems caused by the change in the temperature/deterioration of CO2 gas. The transient response, however, is as slow as a few hundred milliseconds because of the slow dynamics of a thermopile power sensor. When machining conditions of a CO2 laser are changed, this rather slow response requires an extra dwell time, resulting in low productivity of the machining. To cope with this problem, the authors have developed adaptive feedforward control for a CO2 laser in addition to conventional feedback control. The model of a CO2 laser is described as a gain, which is varied by the setting parameters; laser power, pulse frequency and duty factor, as well as gas conditions. In this paper, two new variables, effective discharge power and threshold discharge power, are introduced to obtain a compact and adjustable model. With the proposed control system, the step response time of a laser power is reduced to less than ten milliseconds without overshoot, and can be set to desired constant time. The effects of such a fast and stable response on the machining speed and machining quality are examined. The experimental results show that for thin metal line-cutting, neither the melt-off area nor dross is observed even in the no-dwell time case. For thin metal hole-cutting, the machining speed is improved by 30%. 11 refs., 14 figs., 3 tabs.

  5. Improvement of In2O3-based CO sensor by using surface modifiers; Hyomen shushokuzai ni yoru sanka injiumukei soshi no CO kenchi tokusei no kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Yamaura, H.; Miura, N.; Amaze, N. [Kyushu University, Fukuoka (Japan); Tamaki, J. [Ritsumeikan University, Kyoto (Japan); Moriya, K. [Osaka Gas Co. Ltd., Tokyo (Japan)

    1998-02-01

    Aiming at developing a semiconductor CO sensor applicable to the safety control of gas appliances, we carried out an extensive material search for promoters to In2O3-based elements. Among the elements added (0.5 wt%) with each of 12 transition metal oxides, the Co3O4-added one was outstanding in sensitivity and selectivity to CO at 200degC. Remarkably the sensing properties of this element could be improved further by the addition of Au (0.04 wt%). The doubly promoted element, Au(0.04 wt%)-Co(0.5 wt%)-In2O3, gave excellent characteristics in sensitivity to CO, selectivity to CO over H2 and other selected gases, and response rates at 250degC. The promoting effects of the additives were shown to originate from the proper enhancement of catalytic activity for CO oxidation. 11 refs., 9 figs.

  6. Improvement in mechanical properties of chromium-nickel sintered compacts by repeated rolling and annealing; Kuromu nickel shoketsuzai no kurikaeshi atsuen shodon ni yoru kikaiteki seishitsu no kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Harada, Y. [Toyohashi University of Technology, Aichi (Japan); Omori, M. [Hiroshima-Denki Institute of Technology, Hiroshima (Japan); Ando, H. [Nippon Steel Glass Co. Ltd., Tokyo (Japan); Matsui, H. [Tadano Ltd., Kagawa (Japan); Okita, T. [Honda R and D Co. Ltd., Tokyo (Japan)

    1998-09-20

    Chromium-nickel sintered compacts containing 50 and 80 mass%Cr were tried to improve their mechanical properties by means of a thermo-mechanical treatment, i.e., repeated rolling and annealing. Specimens from the as-sintered compacts showed no ductility at room temperature and small ductility at temperatures higher than 1000 K because of poor alloying of nickel with chromium. Tensile properties of the sheets repeatedly rolled with the intermediate annealing at 1173 K were very similar to those of the as-sintered specimen. While the sheets rolled with the annealing at 1573 K were excellently improved in their strength and ductility due to the considerable interdiffusion of chromium and nickel. The intermediate temperature embrittlement, that is, the ductility minimum well observed around 1000 K in a chromium-nickel alloy appeared also in the sheets rolled with the annealing at 1573 K. 15 refs., 13 figs., 1 tab.

  7. Improvement of lean combustion characteristics of heavy-hydrocarbon fuels with hydrogen addition; Suiso tenka ni yoru kokyu tanka suisokei nenryo no kihaku nensho no kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Sakai, Y. [Saitama Institute of Technology, Saitama (Japan); Ishizuka, S. [Hiroshima University, Hiroshima (Japan). Faculty of Engineering

    1999-09-25

    The Lewis numbers of lean heavy-hydrocarbon fuels are larger than unity, and hence, their flames are prone to extinction in a shear flow, which occurs in a turbulent combustion. Here, propane is used as a representative fuel of heavy-hydrocarbon fuels because the Lewis number of lean propane/air mixtures is larger than unity, and an attempt to improve its combustion characteristics by hydrogen addition has been made. A tubular flame burner is used to evaluate its improvement, since a rotating, stretched vortex flow is established in the burner. The results show that with' hydrogen addition, the fuel concentration, the flame diameter and the flame temperature at extinction are reduced and its combustion characteristics are improved. However, it is found that the effective equivalence ration at extinction cannot become so small as that of lean methane/air mixture, which has a Lewis number less than unity. (author)

  8. Improvement of wells turbine performance by means of 3D guide vanes; Sanjigen annai hane ni yoru wells turbine seino no kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Takao, M.; Kim, T.H. [Saga University, Saga (Japan); Setoguchi, T. [Saga University, Saga (Japan). Faculty of Science and Engineering; Inoue, M. [Kyushu University, Fukuoka (Japan). Faculty of Engineering

    2000-02-25

    Performance of a Wells turbine was improved by equipping 3D guide vanes before and behind a rotor. For further improvement, 3D guide vanes have been proposed in this paper. The performance of the Wells turbine with 2D and 3D guide vanes have been investigated experimentally by model testing under steady flow conditions. Then, the running and starting characteristics in irregular ocean waves have been obtained by a computer simulation. As a result, it is found that both of the running and starting characteristics of the Wells turbine with 3D guide vanes are superior to those of the turbine with 2D guide vanes. (author)

  9. Stall margin improvement of an axial flow fan with end wall injection and suction; Hekimen fukidashi suidashi ni yoru han'yo jikuryu sofuki no shissoku kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Nishioka, K.; Kuroda, H.; Obata, S.; Chimura, O. [National Defense Academy, Kanagawa (Japan)

    1999-06-25

    The experimental studies are conducted to reveal the mechanism of stall margin improvement of an axial flow fan by injection or suction from the end wall. In case of injection, the largest improvement is obtained by the injection at about 0. 14 {approx} 0 .21 times axial chord length downstream from leading edge. The reason for large improvement is that stall vortex, shed intermittent separation vortex and tip leakage vortex are dissipated by this injection, and also that this blowing suppresses the separation of boundary layer. In case of suction, the largest improvement is found for the suction from the end wall near leading edge. The amplitude of periodic static pressure after stall inception becomes smaller in comparison with injection cases. These effects are increased with the increase of suction flow rate, because the discharge of the vortex occurs more easily. On the other hand, the suction from the upstream of leading edge reduces the axial velocity near rotor tip, and then it induces stall. Also we tried to visualize the tip region flow, The suppression mechanism is discussed based on the visualization. The suppression of stall is successfully photographed. (author)

  10. Life prolongation of hot metal ladle by improved shape and material of the bricks; Renga keijo to zaishitsu kaizen ni yoru yosenka jumyo no encho

    Energy Technology Data Exchange (ETDEWEB)

    Miwa, Toru.; Mori, Hajime.; Fukushima, Hironori.; Iiyama, Makoto. [NKK Corp., Tokyo (Japan)

    1999-03-01

    Keihin Works, NKK, intended to extend life of a hot metal ladle and reduction of refractory cost by improving shapes and materials of bricks. The refractory composition of the ladle is a 4-layer structure constituted of a permanent lining comprising 3 layers of agalmatolite bricks and a 180 mm thick work lining. High alumina bricks are used for a free board part and Al{sub 2}O{sub 3}-SiC-C bricks for the slag line part to the ground part. Elevation of the pore rate was observed from the working face to the back face in a brick after use. The former is considered caused by densification of structure and the latter by embrittlement by oxidation. Cracks parallel to the working face are considered caused by structural spalling by the difference of the physical properties. Since cracks vertical to the working face are observed, the finite element method (FEM) thermal stress analysis is applied to inspect the possibility of cracks by thermal stress. A brick whose degree of sintering was suppressed was tri allyl manufactured. It brought wide extension of life and reduction of refractory cost. (NEDO)

  11. Stall margin improvements of conventional axial flow fans with the reformed casingtreatments; Casingtreatment ni yoru han`yo jikuryu sofuki no shissoku kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Nishioka, K.; Kuroda, H.; Obata, S.; Chimura, O. [National Defense Academy, Kanagawa (Japan); Takeishi, M.

    1998-09-25

    At the first part of this paper, the experiments and results to the blowing and suction on a fan are presented, and it is found that blowing toward the down stream direction are more effective and blowing location is suitable on the leading edge side of blades. On basis of these results, the reformed casingtreatments which the blowing air from the slots makes the large relative momentum for blade chord are build, and the experiments using the two conventional fans equipped with the reformed casingtreatment and conventional one are performed. So, the very large stall margin improvements (about 1.7 times) and about 0.5% efficiency penalty of 10% stall margin improvement at design flow rate are obtained for the reformed casingtreatment. 10 refs., 15 figs., 1 tab.

  12. Improvements of diesel combustion with pilot and main injections at different piston positions; Piston iso wo koryoshita pilot funsha ni yoru diesel nenshono kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Li, C.; Ogawa, H.; Miyamoto, N. [Hokkaido University, Sapporo (Japan); Sakai, A. [Nissan Motor Co. Ltd., Tokyo (Japan)

    2000-06-25

    The fuel spray distribution in a DI diesel engine with a pilot injection was actively controlled by pilot and main fuel injections at different piston positions to avoid the main fuel injection from hitting the pilot flame. A CFD analysis demonstrated that the movement of the piston with a cavity divided by a central lip along the center of the sidewall effectively separated the cores of the pilot and main fuel sprays. The experiments showed that more smoke was emitted with pilot injection in an ordinary cavity without the central lip while smokeless and low NO{sub x} operation was realized with pilot injection in a cavity divided by a central lip even at heavy loads where ordinary operation without pilot injection emitted smoke so much. The indicated specific energy consumption ISEC was a little bit higher with the pilot injection, mainly because of the reduction in the degree of constant volume combustion. With the advanced pilot injection, ISEC was improved more than that with the retarded pilot injection while the NO{sub x} is a little higher than the retarded pilot injection maintaining still much lower than in ordinary operation. (author)

  13. New method for 3-dimensional visualization of distributed gas using laser ultrasonic technique; Laser choonpaho ni yoru gas no 3 jigen kukan bunpu keisoku

    Energy Technology Data Exchange (ETDEWEB)

    Ochiai, M.; Kubo, K.; Kanemoto, S. [Toshiba Corp., Tokyo (Japan); Kokubo, T. [Tokyo Electric Power Co., Inc. (Japan)

    1998-11-30

    In case that detection of gas leak is performed applying gas sensors, not only sensing for extremely small amount of gas but also measurement of spatial distribution state from the viewpoint of identification of leaking places are important. Meanwhile, it is known that the methane, main component in fuel gas, has characters which absorbs ray having certain specific wavelength and in addition emits its absorbed energy acoustically. As to a photo-acoustic effect in an open space, it is newly found that the signal has a frequency of about 40 kHz and a propagation directivity which is perpendicular to the laser axis. In the feasibility test based on this property, methane molecules are excited by an optical parametric oscillator (OPO) type laser source which has a wavelength of 1330 micron and an output power of about 5 mJ/pulse. Array microphones and 2-dimensional laser scanning system are used for detecting the gas distribution. In the next place, owing to analyzing phase differences of sound wave on the basis of oscillation time of pulse laser, it was verified that the 3-dimensional distribution of gas was measurable. 8 refs., 9 figs., 2 tabs.

  14. Stereo-selective hydrolytic reaction of toxic compounds by enzyme immobilized on porous ceramics; Takoshitsu ceramics kotaika koso ni yoru dokusei kagobutsu no rittai sentakuteki kasui bunkai hanno

    Energy Technology Data Exchange (ETDEWEB)

    Kato, K.; Saito, T. [National Industrial Research Institute of Nagoya, Nagoya (Japan)

    2000-08-25

    Experiment was made on stereo-selective hydrolytic reaction of trifluoroethyl ester of ketoprophene by various kinds of lipase. In addition, study was made on the stability of lipase simply immobilized on porous ceramics under the existence of organic solvent. In the experiment, the hydrolytic activity of 8 kinds of lipase was studied for ketoprophene monochloroethyl ester (1a) and trifluoroethyl ester (1b). The experiment result showed that lipase M originating in mold (Mucor Javanicus) shows a high reactivity and stereo-selectivity for the compound (1a). The lipase immobilized on porous ceramics was easily obtained by a very simple method composed of only throwing carriers into enzyme suspension, agitation and refrigerated drying. The lipase immobilized on porous ceramics 'Toyonite 200-A' synthesized from kaolinite retained the residual activity of nearly 50%, original selectivity and considerable stability after 5 times of repetitive uses. This study result is useful for bio- reactors and bio-sensors for synthesis or decomposition of compounds. (NEDO)

  15. Flows around a moving flat plate simulated by the method of cellular automata. Seru outoman ho ni yoru ido heiban mawari no nagare

    Energy Technology Data Exchange (ETDEWEB)

    Tsutahara, M; Tomiyama, A; Kimura, T; Murata, H [Kobe University, Kobe (Japan). Faculty of Engineering

    1993-08-25

    In order to analyze the field of flow containing a moving boundary by the method of cellular automaton, the method of giving the boundary conditions in the case where a wall is moving at a constant velocity in the normal direction was examined. This method is used to simulate the movement of continuous fluid by statistically treating the movement of many discrete particles which repeat translation and collision. The collision law of particles at grid points is formulated so as to conserve mass(number of particles) and momentum for the purpose of satisfying the governing equation of flow. The object is the flow in the case where a flat plate moves in the normal direction inside the fluid enclosed by rectangular walls and the plate was assumed that it is first in a standing condition, then starts to move from left to right at a speed of V and stops in front of the right wall. Three boundary conditions, surrounding wall, plate in the standing condition and moving plate, were considered. Flow rates were calculated concerning the translation and collision and each divided mean-field-approximation region(space having a magnitude of capable of averaging operation of particles). Effectiveness of proposed boundary conditions was confirmed by a visualization experiment. 3 refs., 14 figs.

  16. Electrostatic settling of catalyst particles in hydrogenation of methyl benzoate. Denkai chinkoho ni yoru ansokukosan mechiru suisoka hannoeki kara no shokubai ryushi bunri

    Energy Technology Data Exchange (ETDEWEB)

    Kato, K. (Japan Energy Corp., Tokyo (Japan). Central Research Lab.)

    1994-03-01

    As benzyl alcohol (BA), which is one of the simplest alcohol having aromatic ring, has been used widely for the fields related to soap, perfume and chemicals industry, its usage has not always been so much because of its expensiveness. Authors developed previously a new process technique to produce cheaper and higher purity BA not through chlorination process using toluene as its raw materials. The BA can be obtained by hydrogenating methyl benzoate (MB) at a dispersion babble tower using cupper-chromium type powder catalyst in mixed solvent of methanol and toluene. The catalyst becomes much fine particles after the reaction. In this study, it is examined to separate MB hydrogenation reaction solution obtained by electrostatic settling into solid and liquid phases as an aim to improve the BA production process. Rate of electrostatic settling does not depend upon solid concentration, slurry forming conditions, electrode materials, specific resistance of slurry layer and others, but is in proportion to electric field intensity. Furthermore, process of the electrostatic settling is expressed by an equation. 9 refs., 9 figs., 3 tabs.

  17. Development of small-size transmission tower erection method; Kogata tetto kumitate koho no kaihatsu kenkyu (gaibushiki crane ni yoru kogata tetto kumitate koho no kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    Matsuishi, S.; Asano, J.; Koji, Y. [Kansai Electric Power Co. Inc., Osaka (Japan); Tsujimura, I.; Teramoto, A. [The Kanden Kogyo Incorporated, Osaka (Japan); Sasaki, T.; Mito, K. [AG Ajikawa Corp., Osaka (Japan); Tsuji, M.; Fukumoto, T.; Yamaguchi, N.

    1997-09-30

    To reduce the construction period and cost and to enhance the safety during 77 kV-class transmission tower election, a new method of small steel transmission tower erection using an external type crane has been developed. For the selection of cranes, a commercially available self-climbing crane was employed which has an operating radius of 11 m, a lifting load capacity of 1.5 t, and a lift of up to 60 m. For the space analysis using a model tower, various supporting methods with horizontal supporting members, stress analysis for each tower stub, and apparatuses were examined. For the demonstration tests of election using the model tower, strain gages were attached at each point of steel tower, crane and horizontal supporting members, to measure the stress of members at each stage of the election. It was confirmed that there were no problems. For the election of actual steel tower, the practicality of this method was compared with that of conventional methods. The construction period was reduced in 20%, and the cost was reduced in 4%. The safety of this method was drastically enhanced due to the lack of moving on the tower and less manual operation. 9 figs., 1 tab.

  18. Simultaneous reduction of NOx and smoke using stratified charge compression ignition; Sojo kongoki no asshuku chakka ni yoru NOx smoke no doji teige

    Energy Technology Data Exchange (ETDEWEB)

    Hashizume, T.; Miyamoto, T.; Akagawa, H. [New ACE Institute Co. Ltd., Ibaraki (Japan); Tsujimura, K. [Chiba Institute of Technology, Chiba (Japan)

    2000-12-25

    Simultaneous reduction of NO{sub x} and smoke under high load conditions could be obtained by MULDIC (MULtiple stage DIesel Combustion) where mixture was made stratified before ignition. In this investigation of the basic characteristics of MULDIC, gaseous fuels (DME, Propane) were charged into the intake air which led to the creation of homogeneous lean mixture, and liquid fuel was injected into the cylinder and made rich mixture. The results of the engine test showed that NO{sub x} emissions could be reduced to less than 100 ppm and smoke emissions were also maintained 0 FSN even at higher loads. Moreover, homogeneous rich mixture test results showed that low smoke combustion could be obtained under equivalence ratio of 1.6. In MULDIC, increasing the ignition delay period of injected fuel, soot formation rate was decreased, because over rich region was avoided. (author)

  19. Application of adaptive control to windmill power system by computer simulation. Simulation ni yoru tekio seigyo no furyoku hatsuden system eno oyo

    Energy Technology Data Exchange (ETDEWEB)

    Tomiya, T.; Matsuo, T. (Anan College of Technology, Tokushima (Japan)); Suzuki, T.; Kamano, T. (Tokushima University, Tokushima (Japan). Faculty of Engineering)

    1991-07-20

    A windmill power system using load DC generators having resistive load was subjected to discussions by simulation on development of a control method and its output characteristics to draw out the wind energy effectively even when the system characteristics are unknown. The control method used is a mountaineering method available among adaptive control methods. As a result of discussions, the effectiveness of the mountaineering method was confirmed in controlling the output either when the wind velocity is constant or variable. With respect to the control interval, which is a problem in carrying out a control, it was found that the control output stabilizes as the control interval is increased when the wind velocity is constant, but takes longer time before reaching a steady state output. When the wind velocity is variable, the increased control interval reduces the output slightly because of the load resistance change becoming coarser. It was also revealed that, on simulated natural winds, this control method can draw out more energy than by a fixed load resistance. 7 refs., 11 figs., 1 tab.

  20. Removal of minute amount of furfural in ethanol aqueous solution by use of batch-rectification; Kaibun seiryu ni yoru ethanol suiyoekichu no biryo furfural no jokyo

    Energy Technology Data Exchange (ETDEWEB)

    Nakano, K.; Shimoda, M.; Uemura, Y.; Hatate, Y. [Kagoshima University, Kagoshima (Japan). Faculty of Engineering

    1997-03-10

    Furfural is produced in the distillation stage of low-class distilled spirit manufacturing and badly influences the quality of products. The removal of minute amount of furfural in an ethanol aqueous solution was thus investigated by an Oldershow-type batch-rectifying column consisting of ten plates. Furfural of 50 ppm was added to an ethanol aqueous solution of 6.6 mole% as raw materials. If the ethanol concentration in the upper distillation plates is set high, furfural is forecast to be concentrated in the intermediate plate. In an experiment, side-cut was carried out at this plate. If side-cut is performed at the seventh-plate tray from the top, the total side-cut rate is 12%. In this case, 77% of furfural is removed. The side-cut rate of ethanol at that time was 11%. Moreover, 85% of furfural was removed when ethanol with high concentration was extracted from the top under total reflux conditions and when side-cut was carried out. Only 9% of ethanol was distilled in this case. It was confirmed that furfural can be separated using a multi-plate batch-distilling column. 2 refs., 4 figs., 1 tab.

  1. Dynamic stability analysis of circular arch subjected to follower forces with small disturbances; Judo kaju wo ukeru enkei arch no yuran ni yoru doteki kyodo to anteisei kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Fukuchi, N.; Okada, K. [Kyushu University, Fukuoka (Japan). Faculty of Engineering; Hirano, Y. [Sumitomo Heavy Industries, Ltd., Tokyo (Japan)

    1997-09-04

    This paper describes the deformation and dynamic stability of circular arch subjected to follower forces in a submerged membrane type marine structure reinforced by arch frames. Governing equations for finite deformations of the circular arch subjected to follower forces are introduced using an embedded curve coordinate, which are formulated by applying Galerkin method. In addition, equations of motion due to small disturbances under given condition of loading are introduced. Based on these equations, dynamic stability of the arch is analyzed by means of Runnge-Kutta-Gill method, to clarify the relationship between disturbances and instability regions and the resulting phenomena. Near the boundary regions of stability, both amplitude and cycle of deformation are greatly affected by the amplitude of disturbances. The dynamic instability is governed by the inverse symmetry primary mode with minimum characteristic frequency which is specific for the circular arch. The dynamic stability has high parameter dependency, and the instability regions have a complicated shapes. Although flattened arch has a smaller static critical load, it provides the dynamic stability against the disturbance. 5 refs., 10 figs.

  2. Development in high speed and high quality laser cutting process in fiber reinforced plastics; FRP no laser ni yoru kosoku, kohinshitsu setsudan gijutsu no kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    Ishide, T.; Shirota, H.; Matsumoto, O. [Mitsubishi Heavy Industries, Ltd., Tokyo (Japan)

    1996-06-01

    Trimming was performed and studied by cutting KFRP, an epoxy matrix with Kevlar fiber woven thereinto, using various laser beams. The CO2 laser is capable of high-speed cutting but the product is low in quality. The surface of a cut by the YAG laser is not high in quality even with its peak output elevated. The thermally affected area is smaller under the excimer laser but it is low in cutting speed. The ablation properties of the excimer laser were investigated and the beam was shaped into a linear beam for another experiment, but it failed to attain the target speed of cutting. Next, a combination of excimer laser and CO2 laser was used for cutting. It was so designed that the preceding CO2 laser cuts the KFRP at a high speed to leave behind a carbonized layer, which is followed by a linear beam which vaporizes the carbonized layer for removal. An optical system is adopted for reshaping the excimer oscillated beam into a tube-like beam. Optical conditions were determined for a fluence value required for the removal of the carbonized layer. When the CO2 laser was set at 160W and the excimer laser at 20W, a 1mm-thick sheet was successfully cut at a speed of 16.7mm/sec. 3 refs., 7 figs.

  3. Fundamental experiment for flash removal of aluminum alloy by CO2 laser beam cutting; CO2 laser beam setsudan ni yoru aluminium gokin no ibaritori no kiso jikken

    Energy Technology Data Exchange (ETDEWEB)

    Kataoka, Y.; Tokunaga, T. [University of Industrial Technology, Kanagawa (Japan); Miyazaki, T. [Chiba Institute of Technology, Chiba (Japan)

    1995-08-25

    CO2 laser beam has been applied to cut of the aluminum alloy. Average cut width, roughness of cut surface and average thickness of heat affected zone are investigated as functions of laser power, cutting speed and assist gas pressure. The average cut width increases with laser power, but it does not depend on the cutting speed. The narrowest average cut width obtained is 0.22mm under the conditions of laser power of 900W and cutting speeds from 600 to 1000mm/min. The roughness of cut surface decreases with decreasing cutting speed. The best smoothness of cut surface obtained is 17 {mu}m (Rmax) , when the conditions are 1100W and 600mm/min. The average thickness of heat affected zone decreases with increasing assist gas pressure. CO2 laser beam cutting is applicable to flash removal from aluminum alloy casting. This process is expected to reduce the need of physical labor and to improve the working conditions in the foundry industry. 32 refs., 10 figs., 2 tabs.

  4. Coal structure construction system with construction knowledge and partial energy evaluation; Kochiku chishiki to bubunteki energy hyoka ni yoru sekitan bunshi kozo kochiku system

    Energy Technology Data Exchange (ETDEWEB)

    Okawa, T.; Sasai, T.; Komoda, N. [Osaka University, Osaka (Japan). Faculty of Engineering

    1996-10-28

    The computer aided coal structure construction system is proposed, and a computational construction example is presented. The coal structure construction engine of this system fabricates molecular structure by connecting fragments sequentially inputted through a user interface. The best structure candidate is determined using construction knowledge and partial energy evaluation every addition of one fragment, and this process is subsequently repeated. The structure evaluation engine analyzes the 3-D conformation candidate by molecular dynamics, and evaluates the conformation by determining the energy value of an optimum structure. As an example, this system was applied to construction of coal molecular structure based on the actual data of partial structure composed of 26 structures from 2l kinds of aromatic cluster structures, 27 bonds from 2 kinds of bridged bonds, and 16 groups from 2 kinds of terminal substitutional groups. As a result, this system could construct a superior structure according to expert knowledge from the viewpoint of energy. 6 refs., 5 figs., 2 tabs.

  5. Separation of polyunsaturated fatty acid esters by flowing liquid membrane with porous partition.; Kakumaku gata ryudo ekimaku ni yoru kodo fuhowa shibosan esuteru no bunri

    Energy Technology Data Exchange (ETDEWEB)

    Yokosawa, R.; Nii, S.; Takahashi, K. [Nagoya Univ., Nagoya (Japan). Depertment of Chemical Engineering; Misawa, Y. [Harima Chemicals, Inc., Osaka (Japan)

    2000-07-10

    A laboratory-constructed flowing liquid membrane apparatus with porous partition (FLM) was applied to the separation of such polyunsaturated fatty acid esters (PUFA-Ets) as eicosapentaenoic acid ethylester (EPA-Et) and docosahexaenoic acid ethylester (DHA-Et) at 293 K. The hydrophilic porous membrane was used as a partition, and 2 M AgNO{sub 3} aqueous solution was used as a membrane liquid. By using dodecane as a feed diluent and m-xylene as a recovery solution, PUFA-Ets were successfully separated from mixture of fatty acid esters. The recovery fraction of PUFA-Ets and the separation degree between DHA-Et and EPA-Et were investigated ; it increases with the velocity of membrane liquid and the flow path length in the module, while it decreased with the velocity of feed and recovery solution. The recovery fraction of DHA-Et reachs 60% with only 8 s-retention time by the continuous operation. The concentrations of the DHA-Et at the outlet of the module were simulated based on the mass transfer model, which gave nearly 85% recovery fraction with 30 s-retention time. These results show that a stable operation, a high recovery and a high recovery and a high throughput are realized by the FLM. (author)

  6. Reduction of nitrogen in the excretion on Japanese flounder using Ulva and Capitellid; Anaaosa to itogokai ni yoru hirame haisetsubutsuchu no chisso shori

    Energy Technology Data Exchange (ETDEWEB)

    Honda, H.; Kikuchi, K.; Sakaguchi, I. [Central Research Institute of Electric Power Industry, Tokyo (Japan)

    1997-03-01

    To develop the culture residue treatment technique using aquatic organisms, the ammonia and nitrate uptake rates of seaweed Ulva and the nitrogen reduction rate of polychaeta annelid Captella sp. with organic sediment predaceous ability were examined in the excretion of Japanese flounder. Nitrogen uptake rate of Ulva was affected by water temperature. It was highest at 20degC, followed at 15degC and 25degC in the order. It was not affected by light intensity between 1500 and 6000 lux. Ammonia and nitrate uptake rates by Ulva were estimated to be 28.2 and 14.6 {mu}g-N/g/h at 20degC under 3000 lux, respectively. Proportion of feces excreted from Capitellid to ingested sediments was 0.38. At 25degC, Capitellid population of one thousand individuals ingested-N at the rate of 24 mg-N/day, and excreted the feces-N of Capitellid at the rate of 7 mg-N/day. About 70% of nitrogen in the sediment was reduced through this process. 15 refs., 9 figs., 13 tabs.

  7. Development of continuous mixer originated from an idea of udon noodle kneading; Udonneri no haso ni yoru renzokuneri mikisa no kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    Maeda, Matabe; Yamada, Ichiu [Maeda Corp., Tokyo (Japan)

    1999-06-10

    The titled idea was applied to solve a difficult mixing problem of concrete of high fine powder content. In mixing of powdery concrete, and there are disadvantages that long time is required and uniform mixing of water with material is difficult. To solve these disadvantages, a udon noodle kneading system in which an action of folding and extending was repeated to uniformly disperse material was adopted. This is a utilization case of theory of n powers of 2, the material is uniformly dispersed becoming 1,024 layers in 10 times, one million layers in 20 time, 1 billion layers in 30 times. A new model mixer M{center_dot}Y BOX was developed and compared with the conventional system. While an experiment is under way, this mixer seems to be applicable to food industry, pharmaceutical industry, pottery,chemical industry. (NEDO)

  8. Experiment for buried pipes by stepped FM-CW radar; Step shiki FM-CW radar ni yoru maisetsukan tansa jikken

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, K.; Ito, M. [Kawasaki Geological Engineering, Co. Ltd., Tokyo (Japan); Tanabe, K. [Central Research Institute of Electric Power Industry, Tokyo (Japan)

    1997-05-27

    The underground radar exploration is adopted to surveys of cavity under the road and buried pipes since the result of high resolution is obtained. However, the explorative depth of the radar is shallow, 2-3m in soil basement, and its applicable field has been limited. The continuous wave radar (FM-CW radar) was devised to get deeper explorative depth, but has been used for the geological structure survey such as the fault survey since it is lower in resolution as compared with the pulse radar. Therefore, to make use of characteristics of the continuous wave radar and enhance resolution in the shallow part, an experiment on buried pipes was conducted for the purpose of assessing and improving the FM-CW radar. In this processing, the wave form treatment used in the reflection method seismic survey was adopted for the radar survey. There are some problems, but it is effective to adopt the same algorithm to that used in the seismic survey to the radar exploration. The explorative depth was discussed from the damping rate of electromagnetic waves and dynamic range of facilities of the experimental site, and 7m was obtained. 5 figs., 1 tab.

  9. Polarimetric borehole radar measurement near Nojima fault and its application to subsurface crack characterization; Polarimetric borehole radar ni yoru Nojima danso shuhen no chika kiretsu keisoku jikken

    Energy Technology Data Exchange (ETDEWEB)

    Sato, M.; Taniguchi, Y.; Miwa, T.; Niitsuma, H. [Tohoku University, Sendai (Japan); Ikeda, R. [National Research Institute for Disaster Prevention, Tsukuba (Japan); Makino, K. [Geophysical Surveying and Consulting Co. Ltd., Tokyo (Japan)

    1997-05-27

    Practical application of subsurface crack characterization by the borehole radar measurement to which the radar polarimetric method was introduced was attempted to measuring objects for which the borehole radar has not been much used, for example, the inside of low loss rock mass or fracture zone where cracks tightly exist. A system was trially manufactured which makes the radar polarimetric measurement possible in the borehole at a 1000m depth and with a about 10cm diameter, and a field experiment was conducted for realizing the subsurface crack characterization near the Nojima fault. For the measuring experiment by the polarimetric borehole radar, used were Iwaya borehole and Hirabayashi borehole drilled in the north of Awaji-shima, Hyogo-ken. In a comparison of both polarization systems of Hirabayashi borehole, reflected waves at depths of 1038m and 1047m are relatively stronger in both polarization systems than those with the same polarization form and at different depths, whereas reflected waves around a 1017m depth are strong only as to the parallel polarization system. Characteristics of the polarization in this experiment indirectly reflect crack structures. 6 refs., 6 figs., 1 tab.

  10. Concurrent multidisciplinary mechanical design based on design task analysis and knowledge sharing; Sekkei task bunseki to joho kyoyu ni yoru mechatronics kyocho sekkei

    Energy Technology Data Exchange (ETDEWEB)

    Kondo, K.; Ozawa, M.; Mori, T. [Toshiba Corp., Tokyo (Japan)

    1999-09-01

    We have developed a systematic design task planning method based on a design structure matrix(DSM) and a lumped model- based framework for knowledge sharing in a concurrent design environment as key techniques for developing higher quality products in a shorter design time. The DSM facilitates systematic analysis of dependencies among design tasks and optimization of the design process. The framework based on a lumped model description of mechanical systems enables concurrent and cooperative work among multidisciplinary designers at an early stage of the design process. In this paper, we also discuss the relationships between these techniques and the product development flow from product definition to detailed design. (author)

  11. Improvement of diesel engine performance by hydraulically powered electronic control (mechatronics) system. Hakuyo diesel kikan no mechatronics system ni yoru seino kojo

    Energy Technology Data Exchange (ETDEWEB)

    Sonoda, K.; Nakamura, Y.; Kajima, T.; Sato, S.; Fujii, T.; Tobe, Y. (Kawasaki Heavy Industries, Ltd., Tokyo (Japan))

    1992-07-20

    This paper describes new hydraulically-actuated mechanisms for both fuel injection and inlet/exhaust valve operation of diesel engines through solenoid valves, which obviate the conventional cam-driven system. These mechanisms were integrated with an electronic control unit also developed in this study and they were mounted as a mechatronics system'' on a power-increased single-cylinder engine. This mechatronics system was mainly composed of an injection control. boost and accumulation component, an inlet and exhaust valve control component, a solenoid valve, an electronic control equipment, a hydraulic power unit, and a maneuvering unit. The verification test was carried out for the improvement of diesel engine performance by the hydraulically powered mechatronics system. As a result, it was proved not only that these mechanisms provide stable operating characteristics over a wide range of conditions, but also that the electronic control system allows accurate, smooth response. 3 refs., 23 figs., 2 tabs.

  12. Solution of combinatorial optimization problems by an accelerated hopfield neural network. Kobai kasokugata poppu firudo nyuraru netto ni yoru kumiawase saitekika mondai no kaiho

    Energy Technology Data Exchange (ETDEWEB)

    Ohori, T.; Yamamoto, H.; Setsu, Nenso; Watanabe, K. (Hokkaido Inst. of Technology, Hokkaido (Japan))

    1994-04-20

    The accelerated approximate solution of combinatorial optimization problems by symmetry integrating hopfield neural network (NN) has been applied to many combinatorial problems such as the traveling salesman problem, the network planning problem, etc. However, the hopfield NN converges to local minimum solutions very slowly. In this paper, a general inclination model composed by introducing an accelerated parameter to the hopfield model is proposed, and it has been shown that the acceleration parameter can make the model converge to the local minima more quickly. Moreover, simulation experiments for random quadratic combinatorial problems with two and twenty-five variables were carried out. The results show that the acceleration of convergence makes the attraction region of the local minimum change and the accuracy of solution worse. If an initial point is selected around the center of unit hyper cube, solutions with high accuracy not affected by the acceleration parameter can be obtained. 9 refs., 8 figs., 3 tabs.

  13. Method for the traveling salesman problem by controlling two parameters of the Hopfield neural network; Parameter seigyogata hop field net ni yoru junkai salesman mondai no kaiho

    Energy Technology Data Exchange (ETDEWEB)

    Setsu, N.; Murakami, K.; Ohori, T.; Watanabe, K. [Hokkaido Institute of Technology, Sapporo (Japan)

    1996-01-20

    For solving the traveling salesman problem (TSP) by using a continuous value outputting neural net (NN), an investigation was given on the accuracy of solution and the possibility on traveling routes by using the penalty coefficient and temperature as the parameters for energy functions. The parameter range to obtain high-quality traveling routes was shown by a numerical experiment. The experimental result revealed that, when the penalty coefficient `r` is large, the traveling route possibility tends to become higher, but the route length increases, and when the `r` is small, the traveling route possibility becomes lower, but the route length decreases, also in the continuous value outputting NN as in the two-value outputting NN. Noticing this fact, and in order to improve the traveling route possibility as well as the solution quality, a method was proposed to expand the penalty control method which was proposed previously by the authors on the two-value outputting NN, into the continuous value outputting NN. In addition, a proposal was also made on a method to derive an optimal temperature efficiently by using the golden section method. It was found that the relative error has been reduced by 48% on the average as compared with that in the conventional method in which the temperature is fixed. 6 refs., 5 figs.

  14. Changes of inflammatory cells in rat lungs exposed to diesel emissions; Diesel haiki bakuro ni yoru rat hai no ensho saibo no henka

    Energy Technology Data Exchange (ETDEWEB)

    Kato, A. [Japan Automobile Research Institute Inc., Tsukuba (Japan); Kagawa, J. [Tokyo Women`s Medical College, Tokyo (Japan)

    1998-05-01

    Study was made on the effect of exposure to diesel emissions on inflammatory cells in a rat lungs. Four kinds of exposure gases with different contents of NO2 and particulate were prepared by diluting diesel emissions. Rats were exposed to diluted diesel emissions for 24 months, and inflammatory cells were detected morphologically in light microscopic and TEM specimens. As a result, particle-laden- alveolar macrophages increased dose- and time-dependently into the submucosa of intrapulmonary bronchioles, alveolar spaces and interstitume of alveolar walls, and bronchoassociated lymphatic tissues. Mast cells infiltrated into the interspaces of epithelial cells in airways. In the submucosa of the terminal bronchioles and the interstitume of alveolar walls, some sorts of inflammatory cells such as mast cells, plasma cells, neutrophils and lymphocytes infiltrated, and some cells showed cell-to-cell contacts. However, the airways were rarely injured by infiltration of inflammatory cells except for a fibrotic change. 2 refs., 2 figs., 2 tabs.

  15. Numerical prediction with `DMDF` model of pack ice motion in the Okhotsk sea; DMDF model ni yoru Okhotsk kai ryuhyo undo no suchi yosoku

    Energy Technology Data Exchange (ETDEWEB)

    Matsuzawa, T.; Yamaguchi, H.; Suzuki, S.; Kato, H. [The University of Tokyo (Japan); Rheem, C. [The University of Tokyo, Tokyo (Japan). Institute of Industrial Science

    1996-12-31

    A simulation was performed on pack ice motion in the Okhotsk Sea in winter by using the distributed mass/discrete floe (DMDF) method that carries out a dynamic numerical calculation of pack ice motion. Several kinds of cases were compared and calculated. As a result, effectiveness was verified on a DMDF model with boundary conditions which are relatively large in range and complex in nature. At the same time, it was possible to estimate part of the characteristics of pack ice motion in this sea area. The numerical calculation used the floe distribution on February 1, 1994 as the initial condition, and performed calculations on conditions until February 8 giving considerations on meteorological and hydrographic data. As a result, the calculation result showed the same movements as those in the observed ice conditions. If an ocean current is hypothesized steady, the calculation is affected more than necessarily by the ocean current, and it derives a result departed from reality. From these findings, it was elucidated that floe motions are governed mainly by wind; and in making a numerical modeling, a consideration including composition with the ocean current is necessary. Shear stress of wind has its acting direction displaced from the wind direction because of effect of the Corioli`s force. 6 refs., 13 figs., 2 tabs.

  16. Simulation of tandem hydrofoils by finite volume method with moving grid system; Henkei koshi wo tsukatta yugen taisekiho ni yoru tandem suichuyoku no simulation

    Energy Technology Data Exchange (ETDEWEB)

    Kawashima, H. [Ship Research Inst., Tokyo (Japan); Miyata, H. [The University of Tokyo, Tokyo (Japan). Faculty of Engineering

    1996-12-31

    With an objective to clarify possibility of application of time-advancing calculated fluid dynamic (CFD) simulation by using a finite volume method with moving grid system, a simulation was performed on motion of a ship with hydrofoils including the control system therein. The simulation consists of a method that couples a moving grid system technology, an equation of motion, and the control system. Complex interactions between wings and with free surface may be considered automatically by directly deriving fluid force from a flow field by using the CFD. In addition, two-dimensional flows around tandem hydrofoils were calculated to solve the motion problem within a vertical plane. As a result, the following results were obtained: a finite volume method using a dynamic moving grid system method was applied to problems in non-steady tandem hydrofoils to show its usefulness; a method that couples the CFD with the equation of motion was applied to the control problems in the tandem hydrofoils to show possibility of a new technology for simulating motions; and a simulation that considers such wing interference as wave creation, discharged vortices, and associated flows was shown useful to understand characteristics of the tandem hydrofoils. 13 refs., 14 figs.

  17. Numerical simulation for submerged body fitted with hydrofoil by boundary element method; Kyokai yosoho ni yoru yokutsuki bossuitai mawari no nagare keisan

    Energy Technology Data Exchange (ETDEWEB)

    Masuda, S.; Kasahara, Y.; Ashidate, I. [NKK Corp., Tokyo (Japan)

    1996-12-31

    In a high-speed boat of a type using hydrofoils, lifting force increases in proportion to square of its length, while displacement is proportional to the third power. Therefore, an idea has come up that speed of a large boat may be increased by combining the hydrofoils with a submerged body. In other words, the idea is to levitate a ship by using composite support consisting of buoyancy of the submerged body and lifting force caused by the hydrofoils. Insufficiency of the lifting force may be complemented by the buoyancy of the submerged body which increases in an equivalent rate as that in the displacement. However, combining a submerged body with hydrofoils render a problem that lifting force for hydrofoils decreases because of interactions among the submerged body, hydrofoils, and free surface. Therefore, assuming a model of a submerged body with a length of 85 m cruising at 40 kt, analysis was given on decrease in lifting force for hydrofoils due to interactions between the submerged and lifting body and free surface by using the boundary element method. As a result, it was verified that the lifting force for the hydrofoils decreases as a result of creation of a flow that decreases effective angle of attach of the hydrofoils. It was also made clear that making the submerging depth greater reduces the decrease in the lifting force. 9 refs., 14 figs., 1 tab.

  18. Evaluation of building envelopes from the viewpoint of capability of controlling thermal environment; Onnetsu kankyo chosei noryoku ni yoru kenchiku gaihi no hyoka no kokoromi

    Energy Technology Data Exchange (ETDEWEB)

    Umeda, K; Ono, S [Taisei Corp., Tokyo (Japan); Shukuya, M [Musashi Institute of Technology, Tokyo (Japan)

    1996-10-27

    The ability that architectural space improves the thermal environment in comparison with outdoor environment is called the `capability of controlling thermal environment.` As the value becomes higher, the indoor thermal environment is more improved. In this paper, the controlling capability of six building envelopes with different window systems was compared. The heat transfer in the wall and window system is approximated using a lumped mass model of heat capacity to obtain a heat balance equation and combined with the heat balance equation in indoor air for backward difference. The wall surface temperature and indoor air temperature in a calculation model are then calculated. A radiation absorption coefficient is used for mutual radiation on each wall. In the model, the adjoining room or first- and second-floor rooms were made the same in conditions as the model on the assumption that the one-side lighted office in an RC reference floor is in the non-illumination and non-airconditioning state. In summer, the controlling capability remarkably varies depending on the window system. For the window facing the south, the annual capability is more advanced than in other directions and the indoor thermal environment is improved on the average. 7 refs., 12 figs., 1 tab.

  19. Clearness index in cloudy days estimated with meteorological information by multiple regression analysis; Kisho joho wo riyoshita kaiki bunseki ni yoru dontenbi no seiten shisu no suitei

    Energy Technology Data Exchange (ETDEWEB)

    Nakagawa, S [Maizuru National College of Technology, Kyoto (Japan); Kenmoku, Y; Sakakibara, T [Toyohashi University of Technology, Aichi (Japan); Kawamoto, T [Shizuoka University, Shizuoka (Japan). Faculty of Engineering

    1996-10-27

    Study is under way for a more accurate solar radiation quantity prediction for the enhancement of solar energy utilization efficiency. Utilizing the technique of roughly estimating the day`s clearness index from forecast weather, the forecast weather (constituted of weather conditions such as `clear,` `cloudy,` etc., and adverbs or adjectives such as `afterward,` `temporary,` and `intermittent`) has been quantified relative to the clearness index. This index is named the `weather index` for the purpose of this article. The error high in rate in the weather index relates to cloudy days, which means a weather index falling in 0.2-0.5. It has also been found that there is a high correlation between the clearness index and the north-south wind direction component. A multiple regression analysis has been carried out, under the circumstances, for the estimation of clearness index from the maximum temperature and the north-south wind direction component. As compared with estimation of the clearness index on the basis only of the weather index, estimation using the weather index and maximum temperature achieves a 3% improvement throughout the year. It has also been learned that estimation by use of the weather index and north-south wind direction component enables a 2% improvement for summer and a 5% or higher improvement for winter. 2 refs., 6 figs., 4 tabs.

  20. Characteristics on the heat storage and recovery by the underground spiral heat exchange pipe; Chichu maisetsu spiral kan ni yoru chikunetsu shunetsu tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Imai, I [Kure National College of Technology, Hiroshima (Japan); Taga, M [Kinki University, Osaka (Japan)

    1996-10-27

    The consistency between the experimental value of a soil temperature and the calculation value of a soil temperature given by a non-steady heat conduction equation was confirmed. The experimental value is obtained by laying a spiral heat exchange pipe in the heat-insulated soil box and circulating hot water forcibly in the pipe. The temperature conductivity in soil significantly influences the heat transfer in soil. The storage performance is improved when the temperature conductivity increases because of the contained moisture. As the difference between the initial soil temperature and circulating water temperature becomes greater, the heat storage and recovery values increase. A thermal core heat transfer is done in the spiral pipe. Therefore, the diameter of the pipe little influences the heat storage performance, and the pitch influences largely. About 50 hours after heat is stored, the storage performance is almost the same as for a straight pipe that uses the spiral diameter as a pipe diameter. To obtain the same heat storage value, the spiral pipe is made of fewer materials than the straight pipe and low in price. The spiral pipe is more advantageous than the straight pipe in the necessary motive power and supply heat of a pump. 1 ref., 11 figs., 1 tab.

  1. Dynamics of hydrogen induced blistering of a low carbon steel sheet by lamb waves analysis; Ramuha no teiryo kaiseki ni yoru hakubanteitansoko no suiso hare no dainamikkusu

    Energy Technology Data Exchange (ETDEWEB)

    Sato, Teruyoshi.; Takemoto, Mikio. [Aoyama Gakuin University, Tokyo (Japan). Faculty of Science and Engineering

    1999-06-15

    With the aim of studying the fracture dynamics of environmentally assisted fractures in thin plates, we developed a new source simulation method of the zeroth-order symmetric (or S{sub 0}-) Lamb wave using the experimental overall-transfer function of the system. The transfer function was determined by the time-domain deconvolution of detected S{sub 0}-Lamb component by the artificial fracture source of a compression -type PZT element whose vibration kinetics was estimated by the iteration so that the S{sub o}-waveform detected. Hydrogen induced blistering was found to be caused by the succession of fast Mode-I fracture with source rise times from 0.6 to 1.0{mu}s. The crack volume estimated by the source simulation corresponded to that of fine blistering with an opening displacement of 5{mu}m. As the estimated fracture kinetics of hydrogen blistering coincide with those of delayed fracture of high tension low alloy steel under tensile loading, the kinetics of first and micro-fractures and blistering induced by hydrogen gas precipitation appears to be independent on the hydrogen solubility and strength of steels, the applied stresses and the orientation of cracks. (author)

  2. Review of research on remote sensing with digital map. Remote sensing to suchi chizu no ketsugo ni yoru kenkyu no shokai

    Energy Technology Data Exchange (ETDEWEB)

    Tanaka, S; Sugimura, T [Remote Sensing Technology Center of Japan, Tokyo (Japan)

    1990-12-05

    This paper describes the relationship between remote sensing and digital map. The relation between remote sensing and digital map is roughly classified into two kinds. One of them is utilization of remote sensing and digital map in combination to analyze phenomena, and the other is normalization of remote sensing data by use of digital map. For examples of utilizing remote sensing and digital map, there are the creation of a perspective image of ground scene from Landsat MSS data by use of a mesh type digital map of the orthogonal co-ordinates, and the creation of an image of the enviromental research along roads from satilite data by use of a vector type digital map. Furthermore, this paper introduces a procedure of correcting geographical strains by use of a digital map and converting a radar image to corrected plane image, and the use of a digital map in the global scale for the analysis of floods and other purposes. 20 refs., 5 figs., 1 tab.

  3. Studies on utilization of nitrogen-fixing bacteria for saving energy; Chisso koteikin no katsuyo ni yoru sho energy no kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Uozumi, T; Koyama, R; Horiuchi, M; Hidaka, M; Masaki, H [The University of Tokyo, Tokyo (Japan); Shigematsu, T; Inoue, A [New Energy and Industrial Technology Development Organization, Tokyo, (Japan)

    1997-02-01

    This paper describes analysis and enhancement of nitrogen-fixing gene of rice root bacteria, such as Klebsiella oxytoca, Azospirillum lipoferumn and Sphingomonas paucimobilis, for realizing energy saving through conservation of nitrogenous fertilizers. For K. oxytoca, modified strain R-16 was developed, which can fix nitrogen effectively even in the presence of NH4{sup +}. Nitrogen-fixing ability of A. lipoferumn depends on the activity control by the modification of nitrogen-fixing enzyme as well as on the adjustment of transcription level by the transcription activating gene, nifA. The control gene relating to the above was analyzed by making clones. As a result, a modified strain TAl without the control by NH4{sup +} was developed. The R-16 and TAl strains were inoculated into rice sterile-cultured without nitrogen. Consequently, inoculated strains were settled in the root, which resulted in the increased vegetation weight of plant to two times heavier than that without inoculation. 9 refs.

  4. Synthesis of AlN fine particles by surface corona discharge-CVD; Enmen corona hoden CVD ni yoru AlN biryushi no gosei

    Energy Technology Data Exchange (ETDEWEB)

    Oyama, Y.; Chiba, S. [Hokkaido National Industrial Research Institute, Sapporo (Japan); Harima, K> ; Kondo, K.; Shinohara, K. [Hokkaido University, Sapporo (Japan)

    1994-09-15

    With an objective to improve insulating and heat dissipating substrates substituting for the conventional alumina substrates, discussions been given on synthesis of AlN fine particles by means of gaseous phase reaction between AlCl3 and NH3 using surface corona discharge as a reaction exciting source. AIN particles should be highly pure to acquire high-heat conductivity, and fine and uniform particles to obtain dense sinters at low temperatures. The particles obtained by using the present method were amorphous particles having nearly spherical form and smooth surface. The particle diameter depends on the initial concentration of AlCl3, and is proportional to 0.4 square of the concentration. Within the range in the present experiment, the diameters ranged from 208 nm to 431 nm. The particle diameter increased in proportion to 0.2 square of an average gas stagnating time within the plasma generating region. The particle size distribution consisted of highly uniform fine particles having the standard deviation at about the same degree as that in the conventional thermal CVD process. The alumina-based oxygen was removed completely by reduction due to graphite powder, but the re-oxidation during removal of the remaining graphite using combustion had oxygen remained at 7.4% by weight. 16 refs., 7 figs.

  5. Studies on sleep patterns and fatigue due to shift work and their work adaptability. Kotai sagyo ni yoru suimin dotai to hiro oyobi sono sagyo tekiosei no kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Matsuoka, N.; Yokota, A. (Univ. of Occupational and Environmental Health, Kitakyushu (Japan). School of Medicine)

    1991-01-01

    Studies were made on sleep patterns and fatigue due to shift work and their work adaptability with respect to the following items: (1) With a nurse work system as the object, a survey of rectum temperature, heart rate and rhythm before and after a midnight shift, and sleep at rising in the morning using the OSA survey method; (2) To analyze actual conditions of cumulative fatigue felt by shift workers and fatigue factors, a survey on shift work history, overtime work time, work patterns, symptoms of cumulative fatigue, and and life satisfaction; (3) A survey on daytime sleep record maintained at working places of guards including those of middle or advanced age, and sleep as affected by a nap; (4) A method of improving complains of circadian rhythm disorders because of variations in sleep and emergence rhythms experienced by shift workers, and discussions of usability of light radiation; and (5) Establishment of a technique to indicate effects of psychological burdens and psychogenic stress on visual functions of shift workers using tensions in focal adjustment. 5 figs., 5 tabs.

  6. Optimization of the catalytic converter internal flow by using 3D-CFD; Sanjigen nagare kaiseki ni yoru shokubai converter nai nagare no saitekika

    Energy Technology Data Exchange (ETDEWEB)

    Toi, M; Sugiura, S [Toyota Motor Corp., Tokyo (Japan)

    1997-10-01

    By using computational fluid dynamics and statistical quality control method, we investigated the contribution of front and rear catalytic converter cone shape for the pressure loss and the partial flow, also led the optimal terms and the predictional formulations efficiently. According to this, we can investigate the optimal position of the catalytic converter from the planning. 8 figs., 6 tabs.

  7. Study of heart rate variability in driving situation by fractal analysis; Fractal kaiseki ni yoru untenchu no shinpaku hendo no bunseki

    Energy Technology Data Exchange (ETDEWEB)

    Hirata, Y; Nagaoka, M [Mazda Motor Corp., Hiroshima (Japan)

    1997-10-01

    This paper will explain method of fractal analysis for heart rate variability, as measuring method of mental stress in vehicle driving. In the previous, although there was a measuring method of mental stress by RSA, a issue arise such as reliability of analysis, because driver`s heart rate affect by respiration and muscle motion as well. We have established a method to measure mental stress by fractal dimension. And tried it is the proving ground and public road driving. We have confident that it is more reliable than RSA to quantify driver`s mental stress and fatigue. 9 refs., 9 figs., 1 tab.

  8. Detachment of solid particulate soils by centrifugal force part 3; Properties of direction for removal force. Enshinryoku ni yoru ryushi yogore no jokyo. dai sanpo; Jokyoryoku no hokosei

    Energy Technology Data Exchange (ETDEWEB)

    Iwasaki, Y. (Koriyama Womens College, Fukushima (Japan)); Lee, S.H. (Tokyo Gakugei Univ., Tokyo (Japan)); Yabe, A. (Bunka Womens Univ., Tokyo (Japan))

    1991-01-20

    Removal by centrigugal force of polystyrene-latex particles with particle sizes of 5, 10 and 15 {mu} m adhering to a glass substrate is studied. Washing was carried out by using an ultracentrifuge provided with an angular rotor, with a rotor angle {theta} of 0 {approximately} 60 {degree}, varying the ratio of horizontal component Fh to vertical component Fv from 1:0 to 1:1.73. Washing was further carried out, changing an angle {theta}{prime} of centrifugal force to the surface on which the particles adhered. From this experiment, the following conclusions were obtained. The less the contribution of Fv to the constant Fh, or reversely the greater the contribution of Fh to the constant Fv, the more was the extent of removal. When the surface on which the particles adhered was turned to the direction pressed by centrifugal force, Fv acted negatively for removal of particles and exhibited a different tendency from that when turned to the the centrifugal direction. When {theta}{prime} was 180 {degree}, the removal force giving an extent of removal of about 80% was 1.5 {times} 10 {sup {minus} 9} N for 5 and 10 {mu} m particles, and 25 {times} 10 {sup {minus} 9} N for 15 {mu} m particles. 11 refs., 14 figs., 3 tabs.

  9. Near-field ground-motion intensity related to displacement of objects; Chokka jishin ni yoru buttai no ido to jishindo tsuyosa

    Energy Technology Data Exchange (ETDEWEB)

    Omachi, T. [Tokyo Institute of Technology, Tokyo (Japan)

    1995-01-01

    Examples of object displacement due to the earthquake in Japan were reversely analyzed. The example of stone jumping in 1984 was studied. Because of soft ground, the characteristic period can be detected by composing a spring system of stone (as a mass) against the ground. As the phenomenon is considered as seismic response, the following facts were known through vibrational test and numerical analysis simulation: the stone jumping is a non-linear response, and depends upon the period and amplitude of input. Its distance is influenced by the horizontal movement. To make the stone jump, the component of which the period is 0.3 to 1.0 sec is dominant with the necessary acceleration of 1.5g. A bell tower weighing 5t in total was displaced 1m by the earthquake in 1909. A model test was conducted by measuring the characteristic period of ground and bell tower. It was known that not the vibration in the direction of beams, but the stronger vibration than 0.1g in the diagonal direction made the pillars jump. The earthquake in 1930 made an exhibited torpedo slide and leave its frictional marks. Through the simulation conducted, it was presumed that the first and succeeding frictional marks were marked by the P-wave and S-wave, respectively, and that the seismic duration was almost 10 sec with the acceleration of 1.3 to 2g. 11 refs., 10 figs., 1 tab.

  10. Method of measurement of near tip field of fast propagating cracks by means of interferometry; Hikari kansho ni yoru kosoku shinten kiretsu sentanbu no oryokuba keisokuho

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, s.; Miyazaki, F. [Toyohashi University of Technology, Aichi (Japan); Nakane, K. [Nitto Denko Corp., Osaka (Japan)

    1994-12-15

    The measurement by an interference method at the tip of fast propagating cracks was investigated. To clarify the direction-dependent problem of dynamic cracks in a higher-order term, a high-precision stress field must be measured in every direction. In this method, the propagated interference fringes near the crack tip are shot at a speed of some hundreds of m/sec, and the coefficient of dynamic stress extension is obtained from the expression given when the number of fringes (`m`) in the interferences fringes is differentiated partially. The information below was obtained. The stress field in every direction can be analyzed by the interference method. However, the interference fringes in an area of absolute {theta} < 120{degree} are radially spread from the crack tip, so the precision of the interference fringes in the {gamma} direction deteriorates. In this area, the above partial differential is higher in precision when {alpha}m/{alpha}{theta} is used instead of {alpha}m/{alpha}{gamma}. The stress extension coefficient obtained by a caustic method can be verified if a stress field of {theta} = {plus_minus}72{degree} is analyzed by the interference method. By shooting in this optical system, the COD measurement, the K-value measurement of caustic light, and the stress field measurement by an interference method can be done simultaneously. 17 refs., 11 figs.

  11. Change of wettability of PTFE surface by sputter etching and excimer laser. Sputter etching oyobi excimer laser ni yoru PTFE hyomen no shinsuika

    Energy Technology Data Exchange (ETDEWEB)

    Yamamoto, S. (Nitto Denko Corp., Osaka (Japan)); Kubo, U. (Kinki University, Osaka (Japan))

    1994-06-20

    The wettability of PTFE (polytetrafluoroethylene) surfaces was improved by sputter etching and excimer laser irradiation. In sputter etching, the PTFE surface was treated by reactive sputter etching with H2O gas to give active groups on the surface. In laser irradiation, the surface was irradiated in pure water by high-energy KrF excimer laser. As the surface wettability was evaluated with a contact angle to water, the contact angle decreased remarkably in both treatments resulting in a good improvement effect. In sputter etching, various new chemical bonds such as F-C=O, F2C-FC-O, F2C-C-O and C-O were observed because of a decrease in F and incorporation of oxygen. Such chemical bonds could be eliminated by ultraviolet ray irradiation, and the treated surface condition approached the initial condition after irradiation of 200 hours. In laser irradiation, it was suggested that C-F bonds were broken, and OH groups were added to the surface by dissociation of H2O to H and OH. 7 refs., 8 figs., 1 tab.

  12. Increase in information by improvement of measuring method in a multichannel taste sensor; Multichannel aji sensor no sokutei hoho no kairyo ni yoru johoryo no zoka

    Energy Technology Data Exchange (ETDEWEB)

    Ikezaki, H.; Taniguchi, A. [Anritsu Corp., Tokyo (Japan)

    1998-11-01

    We have developed a multichannel taste sensor with lipid membranes which can detect and quantify the basic taste substances in aqueous solution. The aim of the present study is to increase selectivity to adsorptive taste substances (bitter, umami and astringent taste substances) for quantification of taste by improving measuring methods. High selectivity to adsorptive taste substances is obtained by CPA measurement algorithm (CPA: Change of membrane Potential caused by Adsorption). High repeatability is also obtained by developing a cleaning technique of taste sensor. 18 refs., 8 figs., 5 tabs.

  13. Analysis of taste qualities and ingredients of beer by taste sensing system; Mikaku sensor ni yoru beer no ajishitsu to seibun no bunseki

    Energy Technology Data Exchange (ETDEWEB)

    Ezaki, S.; Yuki, T. [Kinki University, Osaka (Japan); Toko, K. [Kyushu University, Fukuoka (Japan); Tsuda, Y.; Nakatani, K. [Suntory Ltd., Osaka (Japan)

    1997-08-20

    The taste of beer was measured using a taste sensing system with eight kinds of lipid membrane. The output from the sensor has high discriminating power and high correlation with taste substances in beer and sensory test by human. The estimation of the concentration of taste substances by multiple regression analysis was fairly well. The taste sensor also well estimated the result of sensory test of many keywords concerning beer taste. 16 refs., 8 figs., 1 tab.

  14. Deflection control system for prestressed concrete bridges by CCD camera. CCD camera ni yoru prestressed concrete kyo no tawami kanri system

    Energy Technology Data Exchange (ETDEWEB)

    Noda, Y.; Nakayama, Y.; Arai, T. (Kawada Construction Co. Ltd., Tokyo (Japan))

    1994-03-15

    For the long-span prestressed concrete bridge (continuous box girder and cable stayed bridge), the design and construction control becomes increasingly complicated as construction proceeds because of its cyclic works. This paper describes the method and operation of an automatic levelling module using CCD camera and the experimental results by this system. For this automatic levelling system, the altitude can be automatically measured by measuring the center location of gravity of the target on the bridge surface using CCD camera. The present deflection control system developed compares the measured value by the automatic levelling system with the design value obtained by the design calculation system, and manages them. From the real-time continuous measurement for the long term, in which the CCD camera was set on the bridge surface, it was found that the stable measurement accuracy can be obtained. Successful application of this system demonstrates that the system is an effective and efficient construction aid. 11 refs., 19 figs., 1 tab.

  15. Vertical gust response prediction of cable-stayed bridges in yawed wind; Shachokyo no shafu ni yoru enchoku gust oto no yosoku

    Energy Technology Data Exchange (ETDEWEB)

    Nakamura, S.; Nagamachi, K.; Kawai, Y. [Kawasaki Steel Corp., Tokyo (Japan); Kimura, K.; Fujino, Y. [The University of Tokyo, Tokyo (Japan). Faculty of Engineering; Tanaka, H.

    1996-03-01

    This paper outlines the vertical gust response analysis method in a yawed wind, gives an analytic example, and compares the experimental result with the analytic result to investigate the application of an analysis method and the validity of assumption and approximation. The vertical gust response to two cable-stayed bridges under construction in a yawed wind was predicted by applying assumption and approximation to the gust response prediction method in a yawed wind with the cantilever model having a plate cross-section manipulated. In this case, the wind velocity component perpendicular to the leading edge was defined as an effective wind velocity, and a bridge axis and the component perpendicular to a bridge axis were separately calculated in response. Moreover, some aerodynamic coefficients of a bridge girder cross-section were approximately obtained from the characteristics of the flat blades with same aspect ratio. The obtained analytic result was compared with the wind tunnel test result based on all bridge models. The result showed that the former almost coincides with the latter, the assumption and approximation of this time are verified in validity, and this analysis method can be used for cable-stayed bridges under construction. 10 refs., 7 figs., 2 tabs.

  16. Field vibration test of a long-span cable-stayed bridge by large exciters. Daishinpuku kashin ni yoru chodai shachokyo no jikkyo shindo jikken

    Energy Technology Data Exchange (ETDEWEB)

    Okauchi, I. (Chuo University, Tokyo (Japan). Faculty of Science and Engineering); Miyata, T. (Yokohama National University, Yokohama (Japan). Faculty of Engineering); Sasaki, N. (Mitsubishi Heavy Industries, Ltd., Tokyo (Japan)); Tatsumi, M.

    1992-10-15

    Long-span cable-stayed bridge requires indispensably discussions on safety against gale and earthquake, and correct assessment on its inherent vibration characteristics at the design stage is critical. However, theoretical assessment on structural decay is difficult, hence it is desirable to make measurement and verification upon its completion. This paper reports the result of measurements and considerations on a three-span continuous steel cable-stayed bridge with a length of 790 m (185 m + 420 m + 185 m) spanning between Hitsuishi Island and Iwakuro Island in the Kojima-Sakaide route of the Honshu-Shikoku connecting bridge. Large shaking machines were used to give girders vibrations with large amplitudes (10 cm at maximum), and high-accuracy measurements were made. The measurements verified the reasonability of the dynamic design for the bridge. The measured value of the logarithmic decay rate [delta] as the major experimental data presented that bending vibration is large as a whole, with torsional vibration somewhat smaller, and all the design values were on safety side. Confirmation was made on amplitude dependence of the decay rate, the inherent modes of low-order vibrations, and coupled behaviors among the girders, cables, and towers. 16 refs., 13 figs., 3 tabs.

  17. Vertical vibration control system for PC cable-stayed bridge during cantilever construction; Shuketa jogedo seishin sochi ni yoru haridashi sekoji no PC shachokyo no seishin

    Energy Technology Data Exchange (ETDEWEB)

    Oshio, M.; Nakano, R.; Niihara, Y.; Yano, K.; Takeda, T. [Kajima Corp., Tokyo (Japan)

    1995-12-20

    A PC cable-stayed bridge under extension construction having long span length may have long-cycle vibration generated because of wind. The vibration puts workers working on main girders into a state of seasick causing the workability to drop. Therefore, with an objective to reduce vibration occurring on the main girders during construction, discussions were given on application of an active type vertical vibration absorbing device. The vibration absorbing device is an active system that a weight is driven vertically by a hydraulic actuator. The device was developed with a target that damping ratio when a maximum extension is 120 m becomes three times that when no vibration is absorbed for a 5-span continuous PC cable-stayed bridge with a length of 675 m, a central span of 260 m, and a width of 11 m. A cage housing the weight is connected with the actuator at its top by using pins, and the weight is supported being suspended from the top of the actuator. Vibration is absorbed by utilizing reactive force generated when the weight is driven vertically by the hydraulic actuator. The hydraulic actuator contains a gas spring that supports the dead weight of the weight. Experiments have verified the effectiveness of the vertical vibration absorbing device. 4 refs., 12 figs., 3 tabs.

  18. Reduction of seismic response long-span PC cable-stayed bridge by passive dampers; Damper ni yoru saidai PC shachokyo no jishinji oto no teigen

    Energy Technology Data Exchange (ETDEWEB)

    Takeda, T.; Yamanobe, S.; Niihara, Y. [Kajima Corp., Tokyo (Japan)

    1994-10-31

    It is important in designing a PC cable-stayed bridge to properly estimate the seismic response of the bridge for reduction of the response. In this paper, an improvement of the seismic resistance of PC cable-stayed bridges when dampers are installed between the deck and piers and lateral vibration of the deck is restricted is investigated using a time history response model. PC cable-stayed bridges with a span length of 400 m, particularly two types of bridges of harp and semi-harp are investigated and the following is found by analyzing the case where there are installed hysteresis type dampers (with 1 cm yield displacement and secondary rigidity assumed to be 1/10 times that of initial rigidity, the initial rigidity being parametrically changed.) or viscous type dampers (a damping factor is changed.) The result shows that the dampers can reduce the seismic response of a PC cable-stayed bridge and that a semi-harp configuration of stay cables where stay cable members are substantially vertically arranged is more effective than a harp configuration for the seismic performance of PC cable-stayed bridges. The damper partly bear inertial force of the bridge upon earthquake whereby tension of the stay cable members is reduced and bending moment of the deck is reduced. There is existing an optimum characteristic value of the damper concerning the bending moment of the piers. 5 refs., 7 figs., 2 tabs.

  19. Wind-induced cable vibrations and countermeasures of cables of PC cable-stayed bridge. PC syachokyo keburu no kaze ni yoru shindo to sono taisaku

    Energy Technology Data Exchange (ETDEWEB)

    Yoneda, M. (Kawada Industries Inc., Tokyo (Japan))

    1994-05-01

    In recent years, long span of cable-stayed bridges is remarkable. The wind-induced cable vibration called as line vibration and wake galloping was given as an important problem not only in the steel cable-stayed bridges but also in the PC cable-stayed bridges. The technical engineers in design of the cable-stayed bridges have many times to confront the problems on the vibration control of cables, it is considered that sufficient understand of the wind-induced vibration and countermeasures for cables of the PC cable-stayed bridges is necessary. Many reports on the countermeasure examples and trend of vibration control centred on cables of the cable-stayed bridges have been published. In this paper, the wind-induced vibration of cables in the cable-stayed bridges was reviewed, the examples of countermeasures of vibration control on cables in the PC cable-stayed bridges was mainly introduced. The remaining tasks and future prospects on vibration control of the PC cable-stayed bridges were described. 14 refs., 13 figs., 4 tabs.

  20. Identification of dynamic characteristics by field vibration test in Tsurumi Tsubasa bridge; Tsurumi Tsubasakyo no shindo jikken ni yoru doteki tokusei no dotei

    Energy Technology Data Exchange (ETDEWEB)

    Yamaguchi, H. [Saitama University, Saitama (Japan). Faculty of Engineering; Takano, H.; Ogasawara, M.; Shimosato, T. [Metropolitan Expressway Public Corp., Tokyo (Japan); Kato, M.; Okada, J. [NKK Corp., Tokyo (Japan)

    1996-07-21

    Field vibration test of the Tsurumi Tsubasa Bridge, a long span cable stayed bridge, has been conducted. Focusing on its dynamic characteristics, an identification method from test results and its validity were investigated. The natural frequency identified using mode circle and resonance curve from steady vibration test agreed with that identified by the peak method from free damping test. Accordingly, there was no difference due to identification methods, and both methods provided appropriate accuracy. The natural vibration mode obtained from the steady vibration test agreed with that obtained by the eigenvalue analysis. The dispersion of experimental values, which indicates the adaptation to mode circle method, became a scale indicating reliability of identified values. When the damping obtained by the half power method for the microtremors test is compared with that identified from the steady vibration test and free damping test, it is required to compare them at lower amplitude level region, considering that the amplitude level of microtremors test is very low. For the dynamic characteristics of the Tsurumi Tsubasa Bridge, it was found that it has lower natural frequency and higher modal damping compared with other cable stayed bridges with similar scale of span. 18 refs., 13 figs., 4 tabs.