WorldWideScience

Sample records for tekkin conkurito kotei

  1. Study on grout-filled coupling steel sleeve; Kokan sleeve wo mochiita grout jutenshiki tekkin tsugite ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Hayashi, Y. [Osaka University, Osaka (Japan)

    1997-06-01

    Newly designed grout-filled coupling sleeve is discussed, which uses as the sleeve an electric resistance welded tube with protrusions formed in a checker pattern on its inner wall and is capable of using various premixed grouting materials available on the market. Specimens are subjected to uniaxial tensile loading and positive/negative cyclic loading, and the impact of various factors on the basic performance of the specimens and their stress/distortion characteristics at local spots in the reinforcing bar are disclosed. In the positive/negative cyclic loading in the plastic region, however, such findings are not obtained. In view of the stress/distortion characteristics at local spots in the reinforcing bar, a method is proposed for estimating the coupling strength and fracture type. A method for estimating the deformation behavior of the coupling, however, is not proposed. Investigations are conducted into the manufacture and installation of the grout holding framework, coupling fixing jigs, plugs, etc., and it is found that precasting should be studied in the future. 38 refs., 156 figs., 30 tabs.

  2. 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.

  3. Management of corrosion control of reinforced concrete in the channel tunnel; Kaiyo tunnel no tekkin concrete no bosyoku kanri to unei

    Energy Technology Data Exchange (ETDEWEB)

    Poubaix, A. [Centre Belge d`Etude de La Corrosion, Bruxelles (Belgium); Cargo, S. [Eurotunnel Operation, Folkstone (United Kingdom)

    1994-12-15

    This paper reports, upon describing the summary of design and construction of Eurotunnel, the contents of the discussions carried out by the Brussels Corrosion Research Center, and their results. Circulating oxygen is supplied sufficiently, and the temperature and humidity are kept high in the tunnel in operation, whereas intermittent dryness may occur locally due to strong air circulation caused by a passing train. While corrosion may occur in any of the reinforcing bars, steel frames, or concrete, the basic corrosion mechanism includes pH decrease in concrete due to its carbonatization, cracking and damage in the concrete, and stray current effect. Detailed discussions were given on experiences of building offshore structures in every part of the world. A possibility of the tunnel getting corroded in 50 to 60 years due to de-passivation in reinforcing bars was indicated against the assumed usable life of 120 years. Therefore, cathodic protection and corrosion monitoring were studied, whereby a unique system was proposed to identify hazardous zones, grasp and analyze data concentratedly. 24 refs., 8 figs., 1 tab.

  4. Studies on connecting structure between steel shell and steel reinforced concrete; Kokaku to tekkotsu tekkin concrete tono ketsugo kozo ni kansuru kenkyu

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    Morimoto, A. [Kinki University, Osaka (Japan). Faculty of Science and Engineering; Morikawa, H.; Ito, N. [Metropolitan Expressway Public Corp., Tokyo (Japan)

    1996-02-15

    On the insert reinforcing bar structure for the connecting part of the main tower of cable stayed bridges, this paper reports verification results on a load resistant safety with a full-scale model, structure analysis and construction work. The basic structure was composed of a drilled steel shell, inserted reinforcing bars, fixing structure of bars in lining concrete of the shell and a pressure bearing plate. As an experimental result, the connecting part had a sufficient load carrying capacity against both tensile and compressive loads. The shear stress of the insert reinforcing bar structure was estimated successfully under von Mises`s condition. The shear spring constant in deformation characteristics was linearly proportional to an inserted reinforcing bar ratio. In earthquake, nearly 60% of an allowable compressive load was transferred to concrete through the pressure bearing plate. The analytical results of load resistant deformation characteristics of the connecting part well agreed with experimental ones, and the proposed analytical model was applicable to estimation of a dynamic behavior. 5 refs., 22 figs., 4 tabs.

  5. Measurement of sediments thickness by ground penetrating radar; Denjihaho wo mochiita kotei taisekibutsu soatsu no sokutei

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    Nozawa, E [Tokyo Electric Power Co. Inc., Tokyo (Japan); Inagaki, M

    1997-05-27

    An attempt was made to measure thickness of a layer of reservoir bottom sediments by utilizing the electromagnetic reflection method. Because water is a substance difficult for electromagnetic waves to permeate, considerations were given on to suppress attenuation to a minimum, and improve receiving sensitivity. The test used monocycle pulses with a central frequency of 200 MHz. In order to generate stabilized pulses with little unnecessary reflection, an antenna as large as it can be fitted into a rubber boat was employed. In order to acquire referential data, the test was carried out by using simultaneously a sound wave exploration device. The lake at which the test was carried out is a regulating reservoir with a size of about 250 m {times} 150 m, with its bottom made of concrete slab. This means that the lake consists of a three-layer structure comprising water, soil deposits, and concrete bottom from the water surface. According to an example of acquired electromagnetic exploration records, boundary reflection of water and sediments was observed clearly at water depths of 2 to 3 m as a shallow portion and 5 to 6 m as a deep portion. Reflection between the sediments and the bottom plate was also observed sufficiently distinctly. 3 refs., 8 figs.

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

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    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.

  7. 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.

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

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    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.

  9. 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.

  10. Marine ecosystem and CO sub 2 fixation. ; Development desired on new fixing technology upon elucidating the mechanisms in the natural world. Kaiyo seitaikei to CO sub 2 kotei. ; Shizenkai no mechanism kaimei ni yoru atarashii kotei gijutsu no kaihatsu wo

    Energy Technology Data Exchange (ETDEWEB)

    Nozaki, K [Electrotechnical Laboratory, Tsukuba (Japan)

    1992-02-15

    This paper describes the following matters on CO{sub 2} fixation using living organisms, and marine organisms in particular. For CO{sub 2} fixation using land organisms, promotion is urged on desert greening and forestation with fast growing trees. The CO{sub 2} transfer into deep sea beds with sea water circulation is a slow process, requiring several hundred to one thousand years before the CO{sub 2} increased in the atmosphere is absorbed into deep sea water. Precipitation of organics produced by photosynthesis of vegetable planktons on the ground surface also contributes to the CO{sub 2} transfer into deeper ground. If the CO{sub 2} fixing speed in coral reefs in Okinawa and Hawaii is applied to the coral reefs all over the world, it will mean a CO{sub 2} fixation being carried out corresponding to an annual increase in the forest area of 10,000 to 200,000 km{sup 2}. The paper touches on technological development to fix CO{sub 2} by propagating vegetable planktons on ocean surface with supply of nutritious salt, or to discard liquefied CO{sub 2} from thermal power plants into deep sea beds. 32 refs., 7 figs., 1 tab.

  11. Growth and carbon fixation rate of calcareous algae cricosphaera carterae. Sekkaiso cricosphaera carterae no zoshoku to tanso kotei sokudo

    Energy Technology Data Exchange (ETDEWEB)

    Seki, M; Furusaki, S [The University of Tokyo, Tokyo (Japan). Faculty of Engineering; Shigematsu, K [Sumitomo Chemical Co. Ltd., Osaka (Japan); Shigeta, K [Kanagawa Prefectural Office, Yokohama (Japan)

    1993-09-10

    Notice has been given on a calcareous alga among micro marine algae that play an important role in carbon circulation, and the representative alga, Cricosphaera carterae was cultured to discuss growth and carbon fixation rate experimentally. It was found that nutrient salt is taken in more actively in the bright period during which no fission occurs, and less actively during the growth stage in the dark period. Dependence of nitrate concentration on specific growth rate was measured with semi-continuous culture and two formulas were formulated. The specific growth rate was 0.53/d at an average nitrogen concentration on the ocean surface of 15 mg/m[sup 3]. The maximum specific growth rate was 0.9/d, and the fixing ratio of inorganic carbon to organic carbon was roughly 0.1. Further, the alga was cultured with CO2 concentration doubled (to 715 ppm), where no large difference was discovered in the growth and the inorganic carbon fixation. From these findings, the carbon fixation amount due to algae on the entire earth was calculated to roughly 4 billion tons per year. 23 refs., 10 figs., 4 tabs.

  12. Basic research on the carbon dioxide fixation using seaweed. Kaisorui no tansan gas kotei ni kansuru kiso kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Yamamoto, M.; Ishihara, T. (The Kansai Electric Power Co. Inc., Osaka (Japan))

    1993-08-25

    Study was made for grasping the basic data of CO2 fixation technology by seaweed. The photosynthesis under the sea, which is different from that on the land, is judged to be made by taking in HCO3[sup -] and converting it into CO2 inside the plant. Porphyra yezoensis which is seaweed is cultivated as comestible. With a rise in CO2 content, the growth in length of leaves was observed to be accelerated through ventilating Porphyra yezoensis with the three test types of air which respectively contained 350ppm (atmospheric CO2 content), 1000ppm and 1600ppm CO2. As a result of measuring the photosynthesis speed by the generated quantity of O2, it was heightened with a rise in dissolved inorganic carbonic acid content of the sea water. Measurement was also made of daily fluctuation in calcification speed by Corallina officinalis capable of calcification by ventilating it with 350ppm and 1600ppm CO2. In case of 1600ppm, the sedimentation of CaCO3 was prevented. In case of 350ppm, the sedimentation was quantitatively larger during the bright period than that during the dark period. The growth of Gracilaria gigas which is an agar material was compared by changing the above CO2 levels. In case of 1600ppm, the weight grew to 2.3 times in 20 days. 16 figs., 2 tabs.

  13. Environmental improvement in drying process of plastics part paint; Jushi buhin toso kanso kotei no kankyo kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Nakamura, T.; Horii, H.; Kobayashi, T.; Hayashida, T. [Hino Motors, Ltd., Tokyo (Japan)

    1998-07-01

    A method is developed of applying near infrared rays to the drying of paint coatings on resin-made automobile parts, and its environment improving effects are described. Using the conventional hot-air dryer for the drying of such coatings, the portion near the top surface is hardened prior to the other portions because the heat is absorbed near the top surface. Using an infrared drying system, however, defects in the product surface attributable to the lack of uniformity in the hardening of paint or to the splashing of solvent are remedied because deeper portions are hardened first. Experiment and study are conducted for the purpose of applying a near infrared drying method to an ABS (acrylonitrile butadiene styrene) coating. It is found that the near infrared drying method takes only seven minutes to dry a paint coating for which a hot-air furnace will take 20 minutes, thus shortening the drying time a great deal. Defects of gas hole of coatings are generally dealt with by changing the setting time and drying conditions for example by increasing the amount of the diluting thinner. When an near infrared drying method is used, the amount of the diluting thinner is reduced approximately 50% from the amount required using the hot-air drying method in case of the thickness of 60{mu}m. 2 refs., 9 figs., 2 tabs.

  14. 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.

  15. FY 1996 annual report of investigation on biological fixation of carbon dioxide. 2; 1996 nendo seibutsuteki CO2 kotei ni kansuru chosa hokokusho. 2

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    Various kinds of biological fixation processes of CO2 were evaluated from the various viewpoints. Afforestation of tropical and temperate areas, greening of desert, biomass energy production in these areas by energy plantation, coastal mangrove plantation, fertilization with nitrogen and phosphate to outer ocean and coastal, upwelling zone fertilization with iron, and coral reef expansion combined with OTEC (ocean thermal energy conversion) were comparatively investigated as the selected measures. As a result, the cost of CO2 fixation by cultivation of sea weed and plankton was much higher than that of afforestation. The iron fertilization method which was considered to be one of the high CO2 reduction potentials might be economical. However, its effect could not be quantitatively evaluated. The afforestation of tropical and temperate areas seemed to be most feasible in a short term from the viewpoints of economy and environment. It was suggested that the establishment of a systematic water management technology could make greening and afforestation of desert. 76 refs., 27 figs., 28 tabs.

  16. Geochemical fixation of carbon dioxide in the environment. Chikyu kagakuteki kenchi kara no tansan'en ni yoru nisanka tanso no kotei

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    Ishikawa, M [Mitsubishi Research Institute, Inc., Tokyo (Japan)

    1993-06-15

    The Mitsubishi Research Institute has investigated and discussed the current situation and the future direction of the studies on geochemical fixation of carbon dioxide by means of carbonates. This paper summarizes the results thereof. The discussion items are listed as follows: The current status of land areas active in carbonate fixation (lake-bottom deposits, sabkha, dry areas, carbonate rock areas); investigation on sea areas active in carbonate fixation (coral reef areas, land shelf areas, open sea areas, and mantle); development of environmental change analyzing technologies (measurement of ancient environments, measurement of fixation ages, development of local area analysis, measurement of diagenetic structures, origin and behavior of trace elements in carbonate substances, and measurement of the current environments); evaluation on fixation ability of carbon sinks (circulation and fixation in coral reef ecosystems, calcification mechanisms in calcareous algae, dissolution processes at ocean bottoms, and inorganic chemical measurement); and investigation on simulation models (solution chemistry equilibrium model and global carbonate circulation model). 4 refs., 1 tab.

  17. Report on a survey in fiscal 1999. Survey on trends in new carbon dioxide fixation technologies utilizing bacteria and algae. (3); 1999 nendo saikin sorui wo riyoshita atarashii nisanka tanso kotei gijutsu no doko chosa. 3

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    In order to achieve collection and effective utilization of CO2 as the representative greenhouse effect gas, through use of microorganism functions, a survey was performed on problems when the CO2 fixation system is applied to factories, based on the results of surveys in fiscals 1997 and 1998 and the supplementary surveys therein. Discussions were given on feasibility and effect of introducing the in situ CO2 fixation systems. With regard to the current status and problems in technologies to fix and utilize effectively CO2 by use of photosynthetic bacteria and micro algae by means of solar beam, the paper summarizes the 'searches and breeding of bacteria and algae' and the 'research and development of a high-density and large-quantity cultivation system such as for CO2 fixation and useful substance production'. The paper also describes problems in the CO2 fixation technologies utilizing bacteria and algae. With regard to the CO2 fixation technologies utilizing bacteria and algae, the paper summarized the contents of the survey on CO2 fixation by using photosynthetic bacteria, clostridium bacteria, and coryne bacteria. Surveys were performed inside and outside the country on kinds and existence quantities of unutilized organic wastes in which microorganisms that fix CO2 can be utilized. The CO2 fixation systems can be considered of their possibilities of being introduced into foodstuff factories where organic waste water with high concentration can be obtained. (NEDO)

  18. Report on the coal group in the Sunshine Project in fiscal 1988. Studies on a coal treatment technology in the initial process in liquefaction; 1989 nendo ekika shoki kotei ni okeru sekitan shori gijutsu no kenkyu hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1990-03-01

    This paper reports the achievements in the Sunshine Project in fiscal 1988 in studies on the studies of the initial process in liquefaction. It is intended to identify the swelling phenomenon in coal particles in the coal slurry preparation and preheating processes, and change in the slurry viscosity associated with the heating. The slurry viscosity starts decreasing from around 300 degrees C at which the liquefying reaction begins, and decreases sharply at around 350 degrees C. Therefore, rise in the viscosity at temperatures below 300 degrees C is caused by factors other than the liquefying reaction. The rise starting at 100 to 120 degrees C is due to absorption of the solvent by coal. The rise starting at 210 to 260 degrees C requires further discussions. The equilibrium swelling ratio was measured on different types of coals by using the hydrogenated anthracene oil solvent. No coals swelled at 100 degrees C. The temperature of 200 degrees C largely divides coals into those swelling and those not swelling. At 300 degrees C, the coals were divided into those shrinking after largely swelling, those not swelling and those swelling monotonously. For consideration of the utilization as an auxiliary solvent, petroleum-based heavy oil was used to perform coal liquefaction to discuss effects of the solvent on the liquefaction rates. (NEDO)

  19. Study of promotion of CO2 fixation by the environmental improvement in the coral reef area; Kansho chitai ni okeru kankyo kaizen ni yoru CO2 kotei sokushin no kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Maruoka, T.; Ishitani, H.; Matsuhashi, R.; Yamada, K.; Komiyama, H.; Kraines, S. [The University of Tokyo, Tokyo (Japan). Faculty of Engineering

    1997-01-30

    A study was conducted on how to fix CO2 in the ocean using coral reefs. Coral reefs have extremely high primary productivity ( production quantity of organic matters by photosynthesis) and are expected to be resources to fix CO2 when the quantity of photosynthesis exceeds the quantity of CO2 emitted in association with formation of calcium carbonate skeleton. If organic substances produced in coral reefs are well carried into the open sea, those are settled down on deep beds, which enables the storage into the ocean. At the coral reef floating in the ocean, it is not very deep inside and the seawater stays there, but it has a steep depth outside. By the numerical calculation, an examination was made on how the waterflow changes when making the flow path of seawater between the inland sea and open sea. From the actual calculation of an atoll, it was found that seawater comes in and out from the open sea to the inland sea near the opening of the atoll in accordance with the high tide and ebb tide, but the water stays at the deep bottom of the atoll. When installing a channel with a 10m depth at the portion where the water flows softly, the seawater was actively exchanged. 6 refs., 4 figs.

  20. Survey report of FY 1997 on the trends of novel CO2 fixation technology using bacteria and microalgae; 1997 nendo chosa hokokusho (saikin sorui wo riyoshita atarashii nisanka tanso kotei gijutsu no doko chosa)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    For this survey, the latest technology trends relating to microbial functions are summarized to recover and effectively utilize CO2, typical greenhouse effect gas, using microbial functions. Systematic survey and analysis are conducted concerning the microorganisms useful for fixing CO2, CO2 uptake mechanism during the microbial reactions, utilization methods of solar light and useful energy sources except solar light, highly efficient production of useful materials, and usage of produced useful materials. Research has concentrated on use of biological activities for this purpose through design of bioreactors using microorganisms (bacteria and microalgae) for efficient CO2 fixation. For the process to have net CO2 fixation as assessed by its life cycle and to make the process economically feasible, it is essential not only to fix CO2 merely in the form of biomass but in addition to convert it to useful materials by the catalytic activities of the organisms. Three categories were set for the survey, i.e., microorganisms with CO2 fixation ability, available energy for CO2 fixation, and target CO2 fixation products. 169 refs., 49 figs., 14 tabs.

  1. Survey report for fiscal 1998. Survey of trends of new CO{sub 2} fixation technology using bacteria and algae (II); 1998 nendo chosa hokokusho. Saikin sorui wo riyoshita atarashii nisanka tanso kotei gijutsu no doko chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    The trend of technology is surveyed from a standpoint that, in the process of CO2 fixation using microbes for the production of useful substances, it is essential, in view of income/outgo balance and economy, to utilize their catalytic function. The survey centers about the feasibility of the utilization of organic wastes, cellulose wastes in particular, as an energy source. Special attention is paid to the energy of artificial light and laser beams. From a point of view that it is important to suppress cell multiplication and to effectively utilize only catalytic activity for the production of useful substances, the cell division mechanism of the Corynebacterium is analyzed, and the findings are compiled to facilitate the study as to whether the division may be controlled. A report is also prepared on the metabolic mechanism of a photosynthesizing bacterium that is judged to be the most promising species. Reference is made to aerobic and anaerobic bacteria. Shown are the organic compounds that are formed by CO2 gas fixation thanks to microbial or enzymatic reactions. To emphasize their importance as an energy source and to explain the conversion of biomass into useful substances, the technology and economy of conversion into fuel compounds are surveyed. The production of ethanol out of organic wastes is evaluated in the way of LCA (life cycle assessment). (NEDO)

  2. Fiscal 1997 report on the survey of biological CO2 fixation using arid land and oligotrophic waters; 1997 nendo chosa hokokusho (kansochi, hin`eiyo kaiiki wo riyoshita seibutsuteki CO2 kotei ni kansuru chosa)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    This survey is aimed to investigate various measures to be taken for biological CO2 fixation, to synthetically study feasibilities of the measures from various aspects of CO2 fixation mechanism, scale, speed, and environmental effects and technical problems in case of introducing those, and to assess the measures quantitatively. In this fiscal year, a study was proceeded with of possibilities of carbon fixation by afforestation and that by fertilization into ocean. The paper defined significance of afforestation in arid land, and especially advantages in conducting researches in West Australia. Relationships were examined among afforestation, precipitation and topography. The result of the survey was described of water- and salt-transfer simulation methods. Studies of arid land were made in terms of photosynthetic speed, transpiration speed, soil characteristics, measuring methods for precipitation and vaporization amount, and the examples. Seven places of Leonora where water source and water quality were examined were selected, and the measuring results were described. The paper summed up the state of utilization of biomass energy obtained from forest and commented on a scenario on tree-planting. Finally, a possibility was stated of the carbon fixation by fermentation into ocean. 178 refs., 121 figs., 53 tabs.

  3. Achievement report on the research on possibility of expanding application of information technology to automobile production line; Jidosha seisan kotei eno joho tsushin gijutsu tekiyo kakudai kanosei ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    Before submitting propositions on important technological tasks to be generated in the automobile production line upon application of IT (information technology), a questionnairing is implemented to know the actualities of the line for the purpose of planning a proper merger of IT and the manufacturing technology development capability of the IT accepting site. The questionnaire, aiming at the embodiment of the goals of the projects 'IT related technical tasks relative to its helping human creation of new technologies and enhancement of human ability to make improvement' and 'Technical tasks of developing technical skills into technologies,' asks engineers about the actualities of knowhow at automobile production lines and its development into technologies, about how they take care of what they learned from their predecessors, and about their expectations from and views and opinions toward IT introduction and utilization. It is important to efficiently utilize IT as a means to solve problems involving the knowhow related training on the production line and the handing down of the acquired knowhow to the juniors. Since individual workers' knowhow assumes a certain role at each stage of the automobile production line and since it is necessary to extract the maximum from each worker and to utilize the fruit for improvement on productivity and work efficiency, it is indispensable to efficiently merge the knowhow with IT. (NEDO)

  4. Development of CO2 fixation system at a sludge incinerator by a unicellular green alga chlorella; Gesui odei shokyaku shisetsu ni okeru kurorera wo mochiita CO2 kotei system no kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    Misonou, T. [Yamanashi Univ., Yamanashi (Japan). Faculty of Pedagogy; Morimoto, K. [Yamanashi Univ., Yamanashi (Japan). Graduate School; Suzuki, Y. [Yamanashi Univ., Yamanashi (Japan). Faculty of Engineering

    1997-03-05

    Among many environmental problems now the world is facing with, the increase of CO2 concentration in the atmosphere is considered to give rise to many phenomena causing such serious effects as abnormal weather, water shortage, food shortage, etc., hence predictions by climate models are being tried at many places in the world, and any of them predicts a temperature rise due to the increase of gases such as CO2 causing the green house effect. In this article, an experiment has been carried out which cultures chlorella capable of fixing CO2 by using the exhaust gas actually emit from the sludge incinerator inside the South Sewage Purification Center of Kofu City, Yamanashi Prefecture. As a result, it has been theoretically concluded that a CO2 fixation system can be constructed inside the above center, but it is necessary to consider the balance between working electric energy during the system operation and the amount of CO2 fixation by the above system. In case when the electric power from a commercial power plant is used for the operation of the system, such usage becomes meaningless unless the system fixes CO2 more than the CO2 discharge by this power generation. 11 refs., 5 figs., 4 tabs.

  5. Report on a survey in fiscal 1999. Survey on trends in new carbon dioxide fixation technologies utilizing bacteria and algae. (3); 1999 nendo saikin sorui wo riyoshita atarashii nisanka tanso kotei gijutsu no doko chosa. 3

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    In order to achieve collection and effective utilization of CO2 as the representative greenhouse effect gas, through use of microorganism functions, a survey was performed on problems when the CO2 fixation system is applied to factories, based on the results of surveys in fiscals 1997 and 1998 and the supplementary surveys therein. Discussions were given on feasibility and effect of introducing the in situ CO2 fixation systems. With regard to the current status and problems in technologies to fix and utilize effectively CO2 by use of photosynthetic bacteria and micro algae by means of solar beam, the paper summarizes the 'searches and breeding of bacteria and algae' and the 'research and development of a high-density and large-quantity cultivation system such as for CO2 fixation and useful substance production'. The paper also describes problems in the CO2 fixation technologies utilizing bacteria and algae. With regard to the CO2 fixation technologies utilizing bacteria and algae, the paper summarized the contents of the survey on CO2 fixation by using photosynthetic bacteria, clostridium bacteria, and coryne bacteria. Surveys were performed inside and outside the country on kinds and existence quantities of unutilized organic wastes in which microorganisms that fix CO2 can be utilized. The CO2 fixation systems can be considered of their possibilities of being introduced into foodstuff factories where organic waste water with high concentration can be obtained. (NEDO)

  6. Test and research on the production of useful matter with carbon-dioxide-fixed microorganisms. Production of biodegradation plastics with photosynthesized microorganisms. Tansan gas kotei biseibutsu wo mochiita yuyo busshitsu seisan shiken kenkyu. Kogosei biseibutsu ni yoru seibunkaisei plastic seisan

    Energy Technology Data Exchange (ETDEWEB)

    Miyasaka, H. (The Kansai Electric Power Co. Inc., Osaka (Japan))

    1994-07-10

    The present report introduces the basic research on the production of PHB (one of the biodegradation plastics) by utilizing the photosynthesized microorganisms. The indigo algae are conveniently used for the genetic operation, because they are genetically inferior and have plasmid (extranuclear ringed DNA). Therefore, a certain type of oceanic indigo algae was used for the present research. As a vector to introduce the PHB-producing gene into the indigo alga cell, hybrid plasmid was prepared by combining the indigo alga plasmid pAQ1 with colon bacillus plasmid vectors pUC19. The thus prepared vectors had an introduction efficiency into about 1000 cells per one vector. A RuBisCO gene of indigo alga cell was selected as a promoter to heighten the activity of PHB-producing gene in that cell. The gene is being further studied in promotion efficiency by combining it with the above vector and PHB-producing gene. 4 figs.

  7. FY 2000 report on the basic survey to promote Joint Implementation, etc. Upgrading of energy utilization in the cement production process; 2000 nendo kyodo jisshi nado suishin kiso chosa hokokusho. Cement seizo kotei ni okeru energy kodoka

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    An investigational study was conducted of a project for energy conservation and greenhouse effect gas reduction by introducing the steam injection gas turbine generator to production facilities of the Siam Cement Industry Corporation (SCI) in Thailand. In the project, studies were made on the following: no purchases of electric power by introduction of the steam injection gas turbine generator; additional heating by gas turbine exhaust gas by introduction of the kiln combustion air heater; remodeling of the preheater of raw materials, and the partial calcination before kiln sintering by introduction of the calcination furnace. As a result of the study, the energy conservation amount was 1,200 toe/y, and the greenhouse effect gas reduction amount was approximately 8,000 t-CO2/y, which led to the reserve power for increased production of clinker by about 18%. The size of investment was 314.5 million Baht in total. As to the evaluation of economical efficiency of the investment, the actual period of ROI was a little less than 5 years, and the internal earning rate was 17.7%, which substantially met with SCI's standards for equipment investment. However, there are problems on the gas supply infrastructure, recovery of the white cement demand, etc. (NEDO)

  8. Biological processing of carbon dioxide. ; Photosynthetic function of plants, and carbon dioxide fixing function of marine organisms. Nisanka tanso no seibutsuteki shori. ; Shokubutsu no kogosei kino to kaiyo seibutsu no nisanka tanso kotei kino

    Energy Technology Data Exchange (ETDEWEB)

    Hirai, M [National Research Inst. for Pollution and Resources, Tsukuba (Japan)

    1991-02-15

    This paper describes photosynthetic function of plants, and CO {sub 2} fixing function of marine organisms. Among the photosythetic reaction systems, the C {sub 3} type reaction carries out CO {sub 2} fixation using the Calvin cycle, and takes out the carbon dioxide out of the system through enzymatic reactions of 3-phosphoglycerate {yields} fructose-6-phosphate. The C {sub 4} type reaction has a special cycle to supply CO {sub 2} to the Calvin cycle, i. e. C {sub 4} dicarboxylic acid cycle. The CAM type reaction enables the photosynthetic type to be converted according to variations in the growing environment. The majority of the surace agricultural crops are from C {sub 3} plants, of which yield may be increased when grown in a high CO {sub 2} atmosphere. On the one hand, gene engineering may make possible breeding of plants having high CO {sub 2} fixing capability. In the area of marine organisms, lime algae growing in clusters around coral reefs form and deposit CaCO {sub 3}. Reef creating corals have symbiotically in their stomach layer brown algae having photosynthetic function to build CaCO {sub 3} skeleton. The corals calcify algae quickly and in a large quantity, hence play an important role in fixing underwater CO {sub 2}. 2 tabs.

  9. FY 2000 report on the promotion projects by Research Institute of Innovative Technology for the Earth. Proceedings of the international seminar (Reports on photosynthetic CO2-assimilating enzymes by the international workshops); 2000 nendo chikyu kankyo sangyo gijutsu kaihatsu suishin jigyo kokusai seminar jigyo shiryo. Kogosei CO2 kotei koso kokusai workshop hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    Described herein are the reports on photosynthetic CO2-assimilating enzymes, presented to the international symposium. These enzymes are important for assimilating CO2 in air, maintaining the environments and production of foods. For genes and proteins, the topics include diversification and function evolution of the RuBisCO (ribulose 1,5-bisphosphate carboxylase/oxygenase) in the natural environments, in particular in microorganisms. For activity regulation of PEPC, the topics include three-dimensional structures of PEPC and phosphorylation mechanisms and activity regulation therefor. For activity regulation of RuBisCO, the topics include post-translational activity of the enzymes (e.g., methylated enzyme); molecular regulation mechanisms involved in the biosynthesis and decomposition of RuBisCO; and activity regulation mechanisms in the chloroplast. For leaf photosynthesis and RuBisCO, the topics include importance of enzymes and involved in-vivo reaction steps for leaf photosynthesis CO2 assimilation reactions. For function of PEPC, the topics include the biochemically and molecular biologically necessary and sufficient conditions for the C4 mechanism as the special photosynthesis mechanism. For transgenic approaches, the topics include procedure for allowing the RuBisCO gene of a dissimilar organism to function in the tobacco chloroplast, and introduction of enzymes involved in the C4 photosynthesis pathway in C3 plants. (NEDO)

  10. Report on a survey in fiscal 1999. Part 3. Survey on biological CO2 fixation utilizing arid regions and oligotrophic sea areas; 1999 nendo kansochi, hin'eiyokaiiki wo riyoshita seibutsuteki CO{sub 2} kotei ni kansuru chosa. 3

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    With objectives to elucidate whether CO2 fixation quantity can be increased by utilizing the features of ecological systems, and know what degree the increasing possibility is at, surveys were performed on (1) the 'possibility of carbon fixation by means of afforestation in arid regions', and (2) the possibility of carbon fixation by applying fertilizers into oceans'. With respect to the (1) afforestation in arid regions, surveys were performed mainly in the West Australian Province to elucidate the current status of carbon fixation quantity, its possibility for increase, water balance, importance of soil structures, and effects of salts (including nutritious salt) on vegetation. Regarding the (2) fertilizer application into oceans, elucidation was made on circulation of organic matters in oceans, effects of applying ferrous fertilizers on the carbon fixation, and the importance of supplying inorganic nitrogen during the fertilizer application. The material cost for scattering irons at this time was calculated as two dollars per ton of carbon fixation quantity. Surveys were also carried out on processes of decomposition of particulate organic matters, and the change in the C/N ratio during the processes. Proposals were presented on preparing the platform that can calculate the carbon fixation quantity when water, soil, nutritious salt, afforestation, and climate are changed, and on preparing the scenario that can increase the carbon fixation quantity in the order of 1Gt-C/y. (NEDO)

  11. Fiscal 1985 Sunshine Program achievement report. Development for practical application of photovoltaic system (Verification of experimental low cost silicon refining - Development of technology for chlorosilane hydrogen-reduction process); 1985 nendo taiyoko hatsuden system jitsuyoka gijutsu kaihatsu seika hokokusho. Tei cost silicon jikken seisei kensho (chlorosilane no suiso kangen kotei no gijutsu kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1986-03-01

    The operation continues of the experimental device capable of producing 10 tons/year of SOG (spun on glass)-Si, and efforts are under way to carry out improvements, to verify such improvements for the results, and to develop operation control technologies. During the operation, improvements are made with respect to the length of stable operation period, granule quality, and device operation, and the results are verified. An automated control test system is verified, and a reactor tube newly developed by Shin-Etsu Chemical Company is subjected to a durability verification test. On the other hand, development is started of SiC-CVD (chemical vapor deposition) technology for materials for large reactor tubes, studies are started on a basic experimental device, basic studies are conducted for designing a large reactor, and investigations are conducted of a large plant conceptual design, an automated control system for reactors, and so forth. The results achieved are all found to be satisfactory. Above all, the granule quality is improved to be quite high in purity, and a cast cell made from improved granules exhibits a photoelectric conversion efficiency to exceed 13%. It is also found that the newly developed reactor tube is stronger than conventional reactor tubes and will be advantageous over others in the future enlargement of devices. (NEDO)

  12. Fiscal 1986 Sunshine Program achievement report. Development for practical application of photovoltaic system (Verification of experimental low cost silicon refining - Development of technology for chlorosilane hydrogen-reduction process); 1986 nendo taiyoko hatsuden system jitsuyoka gijutsu kaihatsu seika hokokusho. Tei cost silicon jikken seisei kensho (Chlorosilane no suiso kangen kotei no gijutsu kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1987-03-01

    The aim is to develop a fluidized bed reactor high in productivity and low in power consumption for the realization of mass production of low cost polycrystalline silicon usable for solar cell construction. An experimental device capable of producing 10 tons/year of SOG (spun on glass)-Si is built and operated. The fluidized bed reactor treating trichlorosilane as the material and the product quality achieve the initially set goals, and the essence is seized of operation management technology. In fiscal 1986, for development of the technology into a practical application technology, designs are prepared for a larger reactor unit and a large plant of the commercial scale. From the viewpoints of production efficiency and cost, the enlargement of a reactor unit is an inevitable task to discharge before practical application. There are two challenges to meet. One is the development of technologies for manufacturing large reactor tubes strong enough to withstand practical service and the other the development of a reactor structure fit for dimensional enlargement. It is then found that the concept of an economically optimum design relative to device series or device block formation is variable in the case of large plants, dependent on the scale of production, and that therefore it is necessary to arrange problems in a proper order to facilitate further deliberation. (NEDO)

  13. Fiscal 1999 achievement report on regional consortium research and development project. Regional consortium research and development in its 3rd year (Research and development of process change accommodating flexible robot technology); 1999 nendo kotei tekiogata flexible robot gijutsu ni kansuru kenkyu kaihatsu seika hokokusho. 3

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    A prototype force control piston insertion device which does not need jigs is built for use on the assembly line. An extensive reduction in investment for automated facilities is expected to realize because jigs conventionally required for each size are dispensed with. For expanding the scope of force control application, the device is verified for serviceability by use of a 5-axis robot and a visual servo control technique. A combination of vibration control and tracking control is applied to an integrated simulation/experiment environment. For the processing of inner force sensor data, a pseudo contact point monitoring technique is used. A wire type tactile sensor is proposed, which has a flexible-structure moment detector in which a flexible beam like a piano wire is the probe. For the inspection of ICs (integrated circuits), a passive compliance unit and a force control based flexible inserter are fabricated, to be used for a reduction in the number of no-good contacts. Technologies of shock absorption aided by robot terminal device tactile sense and of virtual damper control for shortening the setting time are verified for their validity by use of the IC inspecting inserter. (NEDO)

  14. Achievement report for fiscal 1999 on development of 'technology to promote reduction of discharge of dioxins and development of technology to suppress discharge of dioxins in aluminum product manufacturing processes'; 1999 nendo dioxine rui haishutsu sakugen sokushin gijutsu kaihatsu seika hokokusho. Aluminium seihin seizo kotei ni okeru dioxin rui no haishutsu yokusei seigyo no kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    Research and development has been performed with an objective to reduce discharge of dioxins in aluminum product manufacturing processes. With regard to the quantity of chlorine used in aluminum molten metal refining process, the refining tests using 100% chlorine gas and the mixed gas (nitrogen gas mixed at 80%) revealed that either gas has approximately the same degassing performance, and the use of the mixed gas can reduce the amount of chlorine used. Dioxin concentrations in the gas discharged from the refining process were measured under the refining condition using less amount of chlorine. As a result, it was verified that, in the case of using 20% chlorine gas plus 80% nitrogen gas, the concentrations of dioxins decrease to about l/6, or 0.6 ng-TEQ/N{sup 3}. The studies on suppressing the discharge of dioxins from the facility to wash chlorine treatment exhaust gas discovered that dioxin concentration in the scrubber circulating solution can be suppressed to 1/10 or less by means of gravity precipitation and separation of the suspended liquid. It was also made clear that pH should preferably be controlled to 10.5 to separate suspended substances from the precipitated solution. (NEDO)

  15. Achievement report for fiscal 1999 on development of technology to promote reduction of discharge of dioxins. Development of technology to reduce discharge of dioxins in steel manufacturing processes; 1999 nendo dioxin rui haishutsu sakugen sokushin gijutsu kaihatsu seika hokokusho. Seiko kotei ni okeru dioxin rui haishutsu sakugen gijutsu kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    Research and development has been performed on a scrap melting process to make dioxins emission concentration to 0.2 ng-TEQ/Nm{sup 3} or less in steel making electric furnaces. The testing facility is of semi-sealed structure, consisting of an arc dissolution furnace, an exhaust gas combustion section, an auxiliary combustion chamber, and a quenching chamber. In the arc dissolution chamber, oxygen and coke are blown in at the same time as turning the arc power supply on, and then secondary combustion air was blown in to burn carbon monoxide gas generated from steel melting. The temperature was raised to about 850 degrees C at which dioxins are decomposed in the auxiliary combustion chamber, and then quenched to 200 degrees C or lower in the quenching chamber to prevent recombination of dioxins. As a result of the test, the exhaust gas temperature after the combustion was estimated to have reached about 900 degrees C at which dioxins are decomposed. In addition, because it was possible to control the exhaust gas temperature at the outlet of the auxiliary combustion chamber to about 850 degrees C and the exhaust gas temperature at the outlet of the quenching chamber to 200 degrees C or lower, the dioxins concentration at the outlet of the quenching chamber was reduced successfully to the targeted value or lower. (NEDO)

  16. Report on the survey in fiscal 1998. 2. Investigation in fiscal 1998 on biological fixation process of CO{sub 2} utilizing arid areas and oligotrophic sea areas; 1998 nendo kansochi, hin'eiyo kaiiki wo riyoshita seibutsuteki CO{sub 2} kotei ni kansuru chosa. 2

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    An investigation was carried out subsequent to fiscal 1997 on biological CO2 fixation process. Western Australia was investigated for afforestation in an arid area. Eighty-eight percent of the total amount of ground surface biomass is found on trees having a height of 4 m or higher. Plants in Sturt Meadows were classified into 16 kinds, and biomass amount in each kind was estimated. Water management was discussed as a possibility of applying the element technologies in arid area afforestation. Different technical proposals on desert planting were also discussed. With regard to oceans, problems and effects are described on fertilization by sprinkling wide area of ocean with nutrient salts for CO2 fixation by means of the ecosystem. Nutrient salt addition is effective in increasing production of organic matters, but what is important is the understanding about food network balance and elementary process of the ecosystem. Composition of organic matters migrating into greater depths is one of the important parameters. A proposal was made on a system evaluation project including fertilizer application by means of closed system experiments for promotion of CO2 fixation and utilization of the produced organic matters in multiple aspects. The project includes balancing experiments on marine ecosystems including coral reefs. Modeling is also important (NEDO)

  17. Achievement report for fiscal 1981 Sunshine Program on development of practical application technologies for photovoltaic power systems. Test production and verification of solar panels (Development of polycrystalline substrate process technologies); 1981 nendo taiyoko hatsuden system jitsuyoka gijutsu kaihatsu seika hokokusho. Taiyo denchi panel jikken seisaku kensho (takessho kiban kotei no gijutsu kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1982-03-01

    Studies are conducted to enlarge the diameter of polycrystalline Si castings and to develop a low-loss slicing method using silicon nitride powder as mold releasing agent. The apparatus for Czochralski's pulling process is improved and tested using SEG (selective epitaxial growth) Si, and now the casting of a 150mm-diameter ingot is feasible. Also, test production of a 94mm-square wafer as specified by NEDO (New Energy and Industrial Technology Development Organization) is successfully carried out. Difficulties in separating the mold releasing agent from the crucible are solved by changing the Si{sub 3}N{sub 4} power solution from PVA (polyvinyl alcohol) to ethyl silicate. The design, manufacture, and installation of the important parts of the system for the mass production of castings are now complete. The crucible is designed to be movable relative to the heater section, and the molten Si is allowed to cool and solidify from the bottom upward. In relation with the development of low-cost wafer manufacturing technologies, low-loss slicing methods are studied. It is concluded that under the current circumstances a multi-blade saw is more promising than the multi-wire saw in view of the damaged slice rate, processing speed, operating cost, and maintainability. (NEDO)

  18. Development of hot water utilizing power plants in fiscal 1999. Development of binary cycle power plant (Development of system to detect well bottom information when geothermal hot water is excavated); 1999 nendo nessui riyo hatsuden plant nado kaihatsu seika hokokusho. Binary cycle hatsuden plant no kaihatsu (chinetsusei kussakuji kotei joho kenchi system no kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    Developmental research has been performed on the MWD system to identify on the real time basis the information about well bottom when geothermal hot water is excavated (azimuth, inclination, pressure and temperature). This paper summarizes the achievements in fiscal 1999. In the developmental research on the detection device, attempts were made in improving the zonde, and enhancing its heat resisting performance. In addition, data were acquired on electronics parts as a result of the heat resistance identifying test. For the on-the-ground devices, improvement was made to add the experiment analyzing program with a program to remove the downhole motor pressure noise. The pressure noise during excavation in the actual wells was collected. In the analyzing system, use of PC, improvement, and operation check were performed on the well trace projecting and indicating system. Operation of the well trace estimating system was checked by using the actual data in order to prepare the operation manual. With regard to the well evaluation supporting system, improvement, operation check and that by using the actual data were executed on the PC version temperature analyzing system. Performance of the zonde was verified by the actual geothermal well test. (NEDO)

  19. Report on the survey in fiscal 1998. 2. Investigation in fiscal 1998 on biological fixation process of CO{sub 2} utilizing arid areas and oligotrophic sea areas; 1998 nendo kansochi, hin'eiyo kaiiki wo riyoshita seibutsuteki CO{sub 2} kotei ni kansuru chosa. 2

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    An investigation was carried out subsequent to fiscal 1997 on biological CO2 fixation process. Western Australia was investigated for afforestation in an arid area. Eighty-eight percent of the total amount of ground surface biomass is found on trees having a height of 4 m or higher. Plants in Sturt Meadows were classified into 16 kinds, and biomass amount in each kind was estimated. Water management was discussed as a possibility of applying the element technologies in arid area afforestation. Different technical proposals on desert planting were also discussed. With regard to oceans, problems and effects are described on fertilization by sprinkling wide area of ocean with nutrient salts for CO2 fixation by means of the ecosystem. Nutrient salt addition is effective in increasing production of organic matters, but what is important is the understanding about food network balance and elementary process of the ecosystem. Composition of organic matters migrating into greater depths is one of the important parameters. A proposal was made on a system evaluation project including fertilizer application by means of closed system experiments for promotion of CO2 fixation and utilization of the produced organic matters in multiple aspects. The project includes balancing experiments on marine ecosystems including coral reefs. Modeling is also important (NEDO)

  20. Fiscal 1982 Sunshine Program achievement report. Development for practical application of photovoltaic system (Verification of experimental low cost silicon refining - Development of technology for chlorosilane hydrogen-reduction process); 1982 nendo taiyoko hatsuden system jitsuyoka gijutsu kaihatsu seika hokokusho. Tei cost silicon jikken seisei kensho (Chlorosilane no suiso kangen kotei no gijutsu kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1983-03-01

    The effort aims to develop a reactor and its peripheral devices and process management technology therefor and to develop chlorosilane hydrogen-reduction process technology as part of the endeavors to develop a low cost production process for silicon for photovoltaic cells for the purpose of building a model plant capable of approximately 10 tons/year in terms of SOG (spin on glass) silicon. The installation of a 10 tons/year class model plant for SOG-Si production is completed in July 1982. Flaws are removed after a test run, and four reactions are accomplished without damage on the reactor tube in the period from February-end to March-beginning marking 550 hours of operation in total. Thanks to the four operations, 1,086kg of granules are experimentally produced and an electric power consumption rate of 30.6KWH/kg Si is achieved, control of the flowing particle amount by reactor differential pressure is accomplished and the same of the yield by recovered silane liquid composition analysis, and essence is seized of operation control technologies. In an experimental apparatus for seed production, Si is crushed by a roll crusher and then subjected to separation by a quartz-made air elutriator. A high yield of 130kg is obtained after crushing for 75 hours. (NEDO)

  1. Fiscal 1983 Sunshine Program achievement report. Development for practical application of photovoltaic system (Verification of experimental low cost silicon refining - Development of technology for chlorosilane hydrogen-reduction process); 1983 nendo taiyoko hatsuden system jitsuyoka gijutsu kaihatsu seika hokokusho. Tei cost silicon jikken seisei kensho (Chlorosilane no suiso kangen kotei no gijutsu kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1984-03-01

    The effort aims to develop a reactor and its peripheral devices and process management technology therefor and to develop chlorosilane hydrogen-reduction process technology as part of the endeavors to develop a low cost production process for silicon for photovoltaic cells for the purpose of building a model plant capable of approximately 10 tons/year in terms of SOG (spin on glass) silicon. A study is made of ten operations (total reaction time of 2,264 hours), and it turns out that the electric power consumption efficiency is near the initially planned value. The yield of Si is, however, but 16.5% which is lower than the initially planned value of 20%. The value is elevated to 18% by raising the reactor temperature. To prevent overcleaning, a reactor with its internal walls experimentally coated with SiC is tested. The problems with devices other than the reactor tube are extraction rendered difficult by anomalously grown granules and processing devices choked by Si powder contained in waste gas after reaction. The first problem is settled by modifying the extraction tube but the other still needs a remedy. The produced granules are found to be high in quality. The seed producing roll crusher is operated for a total of 92 hours yielding 857kg in total. (NEDO)

  2. Achievement report for fiscal 1998 on area consortium research and development business, 2nd year. Area consortium research and development (research and development of process-compatible flexible robot technology); 1998 nendo chiiki consortium kenkyu kaihatsu. Kotei tekiogata flexible robot gijutsu ni kansuru kenkyu kaihatsu (dai 2 nendo)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    To increase international competitiveness, the construction of highly productive systems capable of autonomously accommodating changes in manufacturing processes is indispensable. Robot technologies for flexible, robotized manufacturing lines will be established, and robotization will be promoted in industries related with transportation equipment and semiconductor in and near Kumamoto City. Optimization is to be achieved in such processes as IC chip insertion so that piston insertion into a cylinder with but an extremely little gap between them will be performed without scratches on the cylinder walls and that no plastic deformation will occur in the initial lack of positional correspondence. The technological tasks to be carried out include position detection based on visual information and skill making up, micro-force sensor of great precision and flexible force control, coordinated control of different types of robots, flexible handling mechanism, and integration of different techniques based on an information management system. The control of force now being exercised by humans will be reviewed from a new point of view and harmonization will be established between the human endeavor and sensing devices. Conceptual designs will be completed by the fiscal year end, with efforts concentrated on two prototypes, one for assembly lines and the other for IC inspection. (NEDO)

  3. Fiscal 1980-1987 Sunshine Program achievement reports. Development for practical application of photovoltaic system (Verification of experimental low cost silicon refining - Overview: Development of technology for chlorosilane hydrogen-reduction process); 1980-1987 nendo taiyoko hatsuden system jitsuyoka gijutsu kaihatsu seika hokokusho. Tei cost silicon jijkken seisei kensho sokatsuban (chlorosilane no suiso kangen kotei no gijutsu kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1988-11-01

    The chlorosilane hydrogen-reduction technology development period may be divided into the first phase (fiscal 1980-1985) and the second phase (fiscal 1986-1988). During the former phase, efforts were exerted to develop a small experimental device (10 tons/year class) and technologies to operate the same. Important challenges were to cause reaction to occur only on the seed grains in the reactor and to create a proper material for the reactor tube. In the latter phase, element technologies were developed, indispensable for the development of a practical reactor. Endeavors exerted to solve these challenges were the development of a high-strength large-diameter reactor tube, the development of an SiC-CVD (chemical vapor deposition) coating technology, and the development of a technology to join parts to the ceramic-made reactor tube. After eight years' striving, a fluidized bed reactor has been successfully constructed, capable of continuously reducing trichlorosilane by hydrogen. The success promises stable production and supply of polycrystalline silicon. The SOG (spun on glass)-Si produced by the reactor is pure enough to serve the purpose of photovoltaics, and its unit cost has been lowered as initially intended. (NEDO)

  4. Fiscal 1984 Sunshine Program achievement report. Development for practical application of photovoltaic system (Verification of experimental low cost silicon refining - Development of technology for chlorosilane hydrogen-reduction process); 1984 nendo taiyoko hatsuden system jitsuyoka gijutsu kaihatsu seika hokokusho. Tei cost silicon jikken seisei kensho (chlorosilane no suiso kangen kotei no gijutsu kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1985-03-01

    In fiscal 1984, studies are conducted for long-time stabilized operation of the device (extension of reactor tube service life, elimination of flaws in the granule extraction process, control of deposited silicon), improved granule quality (measures to deal with Cu pollution), cost reduction (improvement on yield of silicon after reaction, reduction in electric power consumption rate), and so forth. The results are found to be satisfactory in outline. The problem of strengthening the reactor tube material itself remains to be solved, however, with many knotty issues to settle before practical application. In the effort to deliberate these difficulties, as many as 4,377 hours (reaction hours) in total are spent in fiscal 1984. During the operation, 8.3 tons of granules are produced of which approximately 7 tons are fed to the next stage of processing. The quality of granules produced in this way is stable thanks to efforts to prevent pollution and to prolong continuous reaction time, and is found to satisfy NEDO (New Energy and Industrial Technology Development Organization) specifications. Furthermore, the cast cell and the ribbon cell using thus-produced granules achieve photoelectric conversion rates of 10% and 9%, respectively, thereby meeting the target goal of 9%. (NEDO)

  5. Fiscal 1987 Sunshine Program achievement report. Development for practical application of photovoltaic system (Verification of experimental low cost silicon refining - Development of technology for chlorosilane hydrogen-reduction process); 1987 nendo taiyoko hatsuden system jitsuyoka gijutsu kaihatsu seika hokokusho. Tei cost silicon jikken seisei kensho (Chlorosilane no suiso kangen kotei no gijutsu kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1988-03-01

    Since its construction in 1982, the experimental device capable of 10 tons/year production of SOG (spun on glass)-Si has been in operation, and the trichlorosilane processing fluidized bed reactor has achieved its goals in performance and product quality. Element studies continue for the enlargement of the reactor unit for practical application and for the designing of a large plant of the commercially viable scale. In fiscal 1987, element studies are conducted for the enlargement of the reactor unit. Concerning the development of technologies for the manufacture of large reactor tubes strong enough to withstand practical application, efforts are made to strengthen materials for the fabrication of reactor element tubes (230mm and 500mm in diameter), to develop SiC-CVD (chemical vapor deposition) technology to provide reactor tube materials with resistance to corrosion, and to develop a single reactor tube structure indispensable for device enlargement. For the verification of such element technologies, in line with the study of experimental device operation capable of 10 tons/year SOG-Si production, studies are conducted on continuous stable operation technologies for the fluidized bed reactor, maintenance and improvement of product quality, and enhancement of durability of constituent parts and components. (NEDO)

  6. Report of the results of the fiscal 1997 regional consortium R and D project. Regional consortium field / R and D on process adaptive type flexible robot technology (first fiscal year); 1997 nendo chiiki consortium kenkyu kaihatsu jigyo. Chiiki consortium bun`ya / kotei tekiogata flexible robot gijutsu ni kansuru kaihatsu (daiichi nendo) seika hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    For the purpose of establishing robot technology required for the construction of a highly functional automation line with flexibility, the R and D were conducted. At Kumamoto University, a model following type power control system was studied into which polynominal trajectory formation algorithm was integrated. Also studied was damping control of robot arms in a disturbance environment. The following were further carried out: experimental verification (HIRATA Corporation) of the application of power control and intelligent control to transportation equipment production line, experimental verification (SAKURAI SEIGI Co. Ltd.) of the application of power control and intelligent control to semiconductor testing equipment, R and D (OMRON Corporation) of high accuracy force sensing and positioning system, research (Kumamoto Technopolis Foundation) on flexible arms/hands suitable for cooperative control, sensor-based skill (Electrotechnical Laboratory), research (Kyushu National Industrial Research Institute) on tactual system and tactual sensing, etc. 20 refs., 86 figs., 14 tabs.

  7. Achievement report for fiscal 1981 on the development of solar energy technologies for the development of practical application technologies for photovoltaic power systems. Experimental fabrication of solar cell panels and verification thereof (Development of technologies for panel assembly process); 1981 nendo taiyo energy gijutsu kenkyu kaihatsu seika hokokusho (taiyoko hatsuden system jitsuyoka gijutsu kaihatsu). Taiyo denchi panel jikken seisaku kensho (panel kumitate kotei no gijutsu kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1982-03-01

    In a study of cell array connection process, continuous and automatic connection of cells is named as the basic concept in view of low cost and high reliability. In the designing of details of cell strings, CZ (Czochralski) cell dimensions are reviewed for cell packaging efficiency improvement, interconnectors and wiring are examined for a easier packaging process, and solder connection is thought over for utility cost reduction. Conditions are established for string fabrication process details. In the study of the panel packaging process, panel package designing is carried out and a dedicated mechanical device is installed. In the study of the inspection process and plant system, data are collected, necessary for the construction and adjustment of an inspection device. Research is conducted on the layout of plant facilities, on required utilities, and on facilities operating state signals to be transmitted to the central control unit. As for an inspection jig supply system, transfer system, and storage rack, they are designed, built, and installed. The plant house is now complete. (NEDO)

  8. Fiscal 1997 report on the results of the New Sunshine Project subsidiary operation. Development of the geothermal water use power plant, etc. (development of the binary cycle power plant / development of the geothermal well MWD system); 1997 nendo New Sunshine keikaku hojo jigyo seika hokokusho. Nessui riyo hatsuden plant nado kaihatsu (binary cycle hatsuden plant no kaihatsu (chinetsusei kussakuji kotei joho kenchi system no kaihatsu))

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    For the purpose of improving efficiency and accuracy in geothermal well drilling, the development was conducted of an MWD (measuring while drilling) which detects borehole information in real time. In fiscal 1997, the following R and D were carried out. As to the downhole equipment, the actual well experiment on the sonde was conducted to confirm the basic performance. The design improvement, trial fabrication and experiment were conducted on mud pulse generating valve driving control equipment, bore hole signal processing unit and temperature correction circuit portion in the sonde. Concerning electronic parts, a heat resistance confirming test was conducted for data collection/assessment. Further, jigs were fabricated for tests to confirm working of each equipment. Relating to the ground equipment, conducted were improvement of the decoded program and betterment of the analytical system and interface. As to the development of the analytical system, data on depth were added to the azimuth/inclination obtained from MWD, which enabled indication of a well drilling tracing chart while drilling. 92 figs., 43 tabs.

  9. Fiscal 1995 report on the results of the subsidy operation under the Sunshine Project on the development of a geothermal water use power plant, etc. Development of the binary cycle power plant (development of the measurement while drilling system for geothermal wells); 1995 nendo New Sunshine keikaku hojo jigyo seika hokokusho. Nessui riyo hatsuden plant nado kaihatsu (binary cycle hatsuden plant no kaihatsu (chinetsusei kussakuji kotei joho kenchi system no kaihatsu))

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    The R and D were conducted of a detection system for measurement of data on the bottom hole of geothermal well, data transmission and signal processing, and an analysis system for well drilling trajectory control and well assessment while drilling of geothermal wells based on the data obtained by the detection system, and the results were reported of the technical development in fiscal 1995. In the development of the downhole detection unit, the following developments were conducted: mud pulse generator, bottomhole signal processor, mode switches, inclination information sensor, power source, measures against vibration/shock, sonde external equipment, tests to confirm heat resistance of electronic parts, and design/manufacture of testing devices. In the development of the surface detection unit, the development was made of experimental analysis program, interface program, and simulation. In the development of the analysis system, as a well trajectory control support system, made were a trajectory planning/display system and a trajectory prediction system. As a downhole assessment support system, made were a temperature analysis system and a pressure analysis system. 4 refs., 298 figs., 88 tabs.

  10. Achievement report for fiscal 1981 on New Energy and Industrial Technology Development Organization-entrusted projects. Solar energy technology research and development; solar panel experiment, manufacture, and verification (Photovoltaic power system practical application technology; ribbon-type crystal substrate process technology); 1981 nendo taiyo energy gijutsu kenkyu kaihatsu seika hokokusho (taiyoko hatsuden system jitsuyoka gijutsu kaihatsu). Taiyo denchi panel jikken seisaku kensho (ribon kessho kiban kotei no gijutsu kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1982-03-01

    Carried over from the preceding fiscal year are the development of ribbon crystal pulling technology and the studies of ribbon crystal substrate quality and plant operation. In the development of ribbon crystal pulling process, a pulling drive is built and the limiter mechanism is strengthened for improvement on ribbon crystal flatness, technologies are established for high-speed pulling of broad ribbon crystals, pulling system prototype is built, after-annealing technique is improved for eliminating distortion, and technologies are developed for continuous feeding of raw materials. In the quality examination of ribbon crystal substrates, a method is tested and studied for bringing about a decrease in the number of SiC grains. The object of the plant operation study is a plant capable of producing 250kW-equivalent ribbon crystals a year, and the efforts involve the ribbon pulling system, rough cutter, real-size cutter, etching unit, shape checker, packing, devices for production lines such as warehouses for products, electric power, gas, water, peripheral equipment for waste water treatment etc., ribbon specifications check, quality related assistance equipment to deal with unacceptable products etc., pollution-preventing facilities for the preservation of production environments, and plant buildings. (NEDO)

  11. Fiscal 1996 report on the results of the subsidy operation under the Sunshine Project on the development of a geothermal water use power plant, etc. Development of the binary cycle power plant (development of the measurement while drilling system for geothermal wells); 1996 nendo New Sunshine keikaku hojo jigyo seika hokokusho. Nessui riyo hatsuden plant nado kaihatsu (binary cycle hatsuden plant no kaihatsu (chinetsusei kussakuji kotei joho kenchi system no kaihatsu))

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    The R and D were carried out of a detecting system for measurement of data on the bottom of geothermal well, data transmission and signal processing, and an analysis system for well drilling trajectory control and well assessment while geothermal well drilling based on the data obtained by the detecting system. The paper reported the results of the technology development in fiscal 1996. In the development of the detecting system, improvement/design were conducted on a mud pulse generator constituting sonde, well bottom signal processing equipment, mode switch and inclined information sensor, and the system equivalent to the actual one was manufactured to conduct a running test at high temperature/pressure. Moreover, a test to confirm heat resistance of electronic parts was made for further improvement in heat resistance of the sonde, in order to obtain the data. In the development of an analysis system, conducted were enhancement of operability of the planning/indication portions of the well drilling trajectory supporting system, improvement of the data intake system, etc. In relation to the well assessment supporting system, carried out were heightening of operability of the temperature analysis portion and confirmation of accuracy increase. 5 refs., 253 figs., 72 tabs.

  12. Determination of the radon Concentration in underground water in selected areas in and around Kumasi

    International Nuclear Information System (INIS)

    Owusu, Seth Adjei

    2012-06-01

    Radon (Rn-222) is a radioactive noble gas of natural origin that may be found anywhere in soil, air and different types of water: surface, borehole, well and spring. It is worth to carry out surveys for the radon in water for radiation protection as well as for geological considerations. The research presenters here was carried out in selected towns in and around Kumasi for the determination of radon concentration in groundwater. The major towns from which samples were taken are , Mowire, Kronum, Aburaso, Medoma, Kenyase, Buokrom, Bomfa, Ayeduase, Kotei, Tikrom. All the samples are used for domestic purposes such as cooking, drinking, bathing and washing. Waters from boreholes and wells in the selected towns were sampled and the radon concentration level measured. The Roll’s method was used for the radon concentration analysis on all the 100 samples. The results shows that, the minimum radon concentration in groundwater was 13015.934 Bq/m3 and it was found at Bomfa, and the highest was found to be 964628.480 Bq/m3, recorded at Mowire. It is believed that this variation of levels is mainly due to the difference in rock type, soil type and geology of the area as well as the depth of the water samples. This information can be used to estimate the possible health hazards from radon in the selected towns in the future from environmental point of view. The data would promote public awareness related to risk of radon exposure. (au)

  13. [On the notes of the Xinkan Huangdimingtangjiujing (see text for symbol) in the possession of the National Diet Library].

    Science.gov (United States)

    Amano, Yosuke

    2014-12-01

    This paper analyzes the notes of Xinkan huangdimingtangjiujing which are in the possession of the National Diet Library, particularly referring to those notes which include "master said", or "master's theory". Some of those are found in the answers from Manase Dosan (see text for symbol) to Hata Soha (see text for symbol) collected in the Kotei meido kyukyo hushin shosho (see text for symbol) which is the record of the question and answer letters between Manase Dosan and Hata Soha. This research indicates that this volume has a close relation to the acupuncture research of Dosan's or Soha's school. And it indicates that the "master" in the Notes of Xinkan huangdimingtangjiujing refers to Dosan. Acupuncture research has been flourishing since the Edo era and has compiled a lot of volumes on acupuncture. This volume contains some pioneering pieces of this research done in the Azuchi Momoyama era by Dosan and Soha, and is a precious material, showing that some of the state of affairs of the research done in that age still remains today.