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Sample records for hydro code fibmet

  1. Development of a finite element code to solve thermo-hydro-mechanical coupling and simulate induced seismicity.

    Science.gov (United States)

    María Gómez Castro, Berta; De Simone, Silvia; Rossi, Riccardo; Larese De Tetto, Antonia; Carrera Ramírez, Jesús

    2015-04-01

    Coupled thermo-hydro-mechanical modeling is essential for CO2 storage because of (1) large amounts of CO2 will be injected, which will cause large pressure buildups and might compromise the mechanical stability of the caprock seal, (2) the most efficient technique to inject CO2 is the cold injection, which induces thermal stress changes in the reservoir and seal. These stress variations can cause mechanical failure in the caprock and can also trigger induced earthquakes. To properly assess these effects, numerical models that take into account the short and long-term thermo-hydro-mechanical coupling are an important tool. For this purpose, there is a growing need of codes that couple these processes efficiently and accurately. This work involves the development of an open-source, finite element code written in C ++ for correctly modeling the effects of thermo-hydro-mechanical coupling in the field of CO2 storage and in others fields related to these processes (geothermal energy systems, fracking, nuclear waste disposal, etc.), and capable to simulate induced seismicity. In order to be able to simulate earthquakes, a new lower dimensional interface element will be implemented in the code to represent preexisting fractures, where pressure continuity will be imposed across the fractures.

  2. Analysis of closed-pool boilup using the TRANSIT-HYDRO code

    International Nuclear Information System (INIS)

    Graff, D.L.

    1983-01-01

    The benign termination of the transition phase of a hypothetical LMFBR accident rests on the avoidance of highly energetic recriticalities prior to escape of bottled molten core materials from the active core region. In scenarios where molten fuel is trapped due to axial blockages, the maintenance of subcritical configurations until radial flow paths develop requires stable boil-up of the molten fuel/steel mixture. This paper describes the analysis of an experiment investigating the behavior of closed boiling pools using the two-fluid hydrodynamics module of TRANSIT-HYDRO, a deterministic transition-phase analysis code

  3. Computer code HYDRO-ACE for analyzing thermo-hydraulic phenomena in the BWR core

    International Nuclear Information System (INIS)

    Abe, Kiyoharu; Naito, Yoshitaka

    1979-10-01

    A computer code HYDRO-ACE has been developed for analyzing thermo-hydraulic phenomena in the BWR core under forced or natural circulation of cooling water. The code is composed of two main calculation routines for single channels such as riser, separator, and downcommer and multiple channels such as the reactor core with a heated zone. Functionally the code is divided into many subroutines to be connected straightforwardly, and so that the user can choose a given course freely by simply arranging the subroutines. In the program, void fraction is calculated by Maurer's method, two-phase frictional pressure drop by Maltinelli-Nelson's, and critical heat flux ratio by Hench-Levy's. The coolant flow distributions in the JPDR-II core calculated by the code are in good agreement with those measured. (author)

  4. Improvements to Busquet's Non LTE algorithm in NRL's Hydro code

    Science.gov (United States)

    Klapisch, M.; Colombant, D.

    1996-11-01

    Implementation of the Non LTE model RADIOM (M. Busquet, Phys. Fluids B, 5, 4191 (1993)) in NRL's RAD2D Hydro code in conservative form was reported previously(M. Klapisch et al., Bull. Am. Phys. Soc., 40, 1806 (1995)).While the results were satisfactory, the algorithm was slow and not always converging. We describe here modifications that address the latter two shortcomings. This method is quicker and more stable than the original. It also gives information about the validity of the fitting. It turns out that the number and distribution of groups in the multigroup diffusion opacity tables - a basis for the computation of radiation effects in the ionization balance in RADIOM- has a large influence on the robustness of the algorithm. These modifications give insight about the algorithm, and allow to check that the obtained average charge state is the true average. In addition, code optimization resulted in greatly reduced computing time: The ratio of Non LTE to LTE computing times being now between 1.5 and 2.

  5. Development of finite element code for the analysis of coupled thermo-hydro-mechanical behaviors of saturated-unsaturated medium

    International Nuclear Information System (INIS)

    Ohnishi, Y.; Shibata, H.; Kobayashi, A.

    1985-01-01

    A model is presented which describes fully coupled thermo-hydro-mechanical behavior of porous geologic medium. The mathematical formulation for the model utilizes the Biot theory for the consolidation and the energy balance equation. The medium is in the condition of saturated-unsaturated flow, then the free surfaces are taken into consideration in the model. The model, incorporated in a finite element numerical procedure, was implemented in a two-dimensional computer code. The code was developed under the assumptions that the medium is poro-elastic and in plane strain condition; water in the ground does not change its phase; heat is transferred by conductive and convective flow. Analytical solutions pertaining to consolidation theory for soils and rocks, thermoelasticity for solids and hydrothermal convection theory provided verification of stress and fluid flow couplings, respectively in the coupled model. Several types of problems are analyzed. The one is a study of some of the effects of completely coupled thermo-hydro-mechanical behavior on the response of a saturated-unsaturated porous rock containing a buried heat source. Excavation of an underground opening which has radioactive wastes at elevated temperatures is modeled and analyzed. The results shows that the coupling phenomena can be estimated at some degree by the numerical procedure. The computer code has a powerful ability to analyze of the repository the complex nature of the repository

  6. The HydroServer Platform for Sharing Hydrologic Data

    Science.gov (United States)

    Tarboton, D. G.; Horsburgh, J. S.; Schreuders, K.; Maidment, D. R.; Zaslavsky, I.; Valentine, D. W.

    2010-12-01

    The CUAHSI Hydrologic Information System (HIS) is an internet based system that supports sharing of hydrologic data. HIS consists of databases connected using the Internet through Web services, as well as software for data discovery, access, and publication. The HIS system architecture is comprised of servers for publishing and sharing data, a centralized catalog to support cross server data discovery and a desktop client to access and analyze data. This paper focuses on HydroServer, the component developed for sharing and publishing space-time hydrologic datasets. A HydroServer is a computer server that contains a collection of databases, web services, tools, and software applications that allow data producers to store, publish, and manage the data from an experimental watershed or project site. HydroServer is designed to permit publication of data as part of a distributed national/international system, while still locally managing access to the data. We describe the HydroServer architecture and software stack, including tools for managing and publishing time series data for fixed point monitoring sites as well as spatially distributed, GIS datasets that describe a particular study area, watershed, or region. HydroServer adopts a standards based approach to data publication, relying on accepted and emerging standards for data storage and transfer. CUAHSI developed HydroServer code is free with community code development managed through the codeplex open source code repository and development system. There is some reliance on widely used commercial software for general purpose and standard data publication capability. The sharing of data in a common format is one way to stimulate interdisciplinary research and collaboration. It is anticipated that the growing, distributed network of HydroServers will facilitate cross-site comparisons and large scale studies that synthesize information from diverse settings, making the network as a whole greater than the sum of its

  7. Development of a dynamic coupled hydro-geomechanical code and its application to induced seismicity

    Science.gov (United States)

    Miah, Md Mamun

    This research describes the importance of a hydro-geomechanical coupling in the geologic sub-surface environment from fluid injection at geothermal plants, large-scale geological CO2 sequestration for climate mitigation, enhanced oil recovery, and hydraulic fracturing during wells construction in the oil and gas industries. A sequential computational code is developed to capture the multiphysics interaction behavior by linking a flow simulation code TOUGH2 and a geomechanics modeling code PyLith. Numerical formulation of each code is discussed to demonstrate their modeling capabilities. The computational framework involves sequential coupling, and solution of two sub-problems- fluid flow through fractured and porous media and reservoir geomechanics. For each time step of flow calculation, pressure field is passed to the geomechanics code to compute effective stress field and fault slips. A simplified permeability model is implemented in the code that accounts for the permeability of porous and saturated rocks subject to confining stresses. The accuracy of the TOUGH-PyLith coupled simulator is tested by simulating Terzaghi's 1D consolidation problem. The modeling capability of coupled poroelasticity is validated by benchmarking it against Mandel's problem. The code is used to simulate both quasi-static and dynamic earthquake nucleation and slip distribution on a fault from the combined effect of far field tectonic loading and fluid injection by using an appropriate fault constitutive friction model. Results from the quasi-static induced earthquake simulations show a delayed response in earthquake nucleation. This is attributed to the increased total stress in the domain and not accounting for pressure on the fault. However, this issue is resolved in the final chapter in simulating a single event earthquake dynamic rupture. Simulation results show that fluid pressure has a positive effect on slip nucleation and subsequent crack propagation. This is confirmed by

  8. Development of a new code to solve hydro-mechanical coupling, shear failure and tensile failure due to hydraulic fracturing operations.

    Science.gov (United States)

    María Gómez Castro, Berta; De Simone, Silvia; Carrera, Jesús

    2016-04-01

    Nowadays, there are still some unsolved relevant questions which must be faced if we want to proceed to the hydraulic fracturing in a safe way. How much will the fracture propagate? This is one of the most important questions that have to be solved in order to avoid the formation of pathways leading to aquifer targets and atmospheric release. Will the fracture failure provoke a microseismic event? Probably this is the biggest fear that people have in fracking. The aim of this work (developed as a part of the EU - FracRisk project) is to understand the hydro-mechanical coupling that controls the shear of existing fractures and their propagation during a hydraulic fracturing operation, in order to identify the key parameters that dominate these processes and answer the mentioned questions. This investigation focuses on the development of a new C++ code which simulates hydro-mechanical coupling, shear movement and propagation of a fracture. The framework employed, called Kratos, uses the Finite Element Method and the fractures are represented with an interface element which is zero thickness. This means that both sides of the element lie together in the initial configuration (it seems a 1D element in a 2D domain, and a 2D element in a 3D domain) and separate as the adjacent matrix elements deform. Since we are working in hard, fragile rocks, we can assume an elastic matrix and impose irreversible displacements in fractures when rock failure occurs. The formulation used to simulate shear and tensile failures is based on the analytical solution proposed by Okada, 1992 and it is part of an iterative process. In conclusion, the objective of this work is to employ the new code developed to analyze the main uncertainties related with the hydro-mechanical behavior of fractures derived from the hydraulic fracturing operations.

  9. Development of finite element code for the analysis of coupled thermo-hydro-mechanical behaviors of a saturated-unsaturated medium

    International Nuclear Information System (INIS)

    Ohnishi, Y.; Shibata, H.; Kobsayashi, A.

    1987-01-01

    A model is presented which describes fully coupled thermo-hydro-mechanical behavior of a porous geologic medium. The mathematical formulation for the model utilizes the Biot theory for the consolidation and the energy balance equation. If the medium is in the condition of saturated-unsaturated flow, then the free surfaces are taken into consideration in the model. The model, incorporated in a finite element numerical procedure, was implemented in a two-dimensional computer code. The code was developed under the assumptions that the medium is poro-elastic and in the plane strain condition; that water in the ground does not change its phase; and that heat is transferred by conductive and convective flow. Analytical solutions pertaining to consolidation theory for soils and rocks, thermoelasticity for solids and hydrothermal convection theory provided verification of stress and fluid flow couplings, respectively, in the coupled model. Several types of problems are analyzed

  10. A posteriori error analysis for hydro-mechanical couplings and implementation in Code-Aster; Analyse d'erreur a posteriori pour les couplages hydro-mecaniques et mise en oeuvre dans Code-Aster

    Energy Technology Data Exchange (ETDEWEB)

    Meunier, S

    2007-11-15

    We analyse approximations by finite elements in space and finite differences in time of coupled Hydro-Mechanical (HM) problems related to the quasi-static linear poro-elasticity theory. The physical bases of this theory are briefly restated and an abstract setting is proposed to perform the mathematical study of the stationary and un-stationary versions of the HM problem. For the stationary version, the well-posedness of the continuous and discrete problems are established and the a priori error analysis is performed. Then, we propose the a posteriori error analysis by using two different techniques suited to estimate the displacement error and the pressure error, respectively, both in the H{sub x}{sup 1}-norm. The classical properties of reliability and optimality are proved for the associated error estimators. Some numerical experiments using Code-Aster illustrate the theoretical results. For the un-stationary version, we first establish a stability result for the continuous problem. Then, we present an optimal a priori error analysis using elliptic projection techniques. Finally, the a posteriori error analysis is performed by using two different approaches: a direct approach and an elliptic reconstruction approach. The first is suited to estimate the pressure error in the L{sub t}{sup 2}(H{sub x}{sup 1})-norm and the second is suited to estimate the displacement error in the L{sub t}{sup {infinity}}(H{sub x}{sup 1})-norm and the pressure error in the L{sub t}{sup {infinity}}(H{sub x}{sup 1})-norm. Numerical experiments using Code-Aster complete the theoretical results. (author)

  11. Investigation research on the evaluation of a coupled thermo-hydro-mechanical-chemical phenomena. 2. Result report

    International Nuclear Information System (INIS)

    Ishihara, Yoshinao; Ito Takaya; Chijimatsu, Masakazu; Amemiya, Kiyoshi; Shiozaki, Isao; Neyama, Atsushi; Tanaka, Yumiko

    2003-02-01

    In order to realize a coupling analysis in the near field of the geological disposal system, the coupling analysis code on the thermo-hydro-mechanical-chemical phenomena by THAMES, Dtransu and phreeqe60, which are existing analysis code, is developed in this study. And we carried out the case analysis on the thermo-hydro-mechanical-chemical phenomena by this code. (1) We have developed coupling analysis system to manage coupling analysis and to control coupling process automatically for THAMES (thermo-hydro-mechanical analysis code), Dtransu (mass transport analysis code) and phreeqe60 (geochemical analysis code). (2) Some supporting module, which includes transfer of dissolution concentration and total concentration (dissolution + precipitation concentration), was prepared as a functional expansion. And in order to treat multi-chemical elements, we have codified mass transport analysis code. (3) We have prepared hydraulic conductivity module of buffer material depending on change of dry density due to chemical equilibrium (dissolution and precipitation of minerals), and change of concentration of NaCl solutions. After THAMES, Dtransu, phreeqe60 and hydraulic conductivity module were installed in the COUPLYS, sensitivity analysis was carried out to check basic operation. (4) In order to confirm the applicability of the developed THMC analysis code, we have carried out case analysis on 1-dimensional and 3-dimensional model which including vitrified waste, over-pack, buffer material and rock in the HLW near-field. (author)

  12. Three-dimensional Boltzmann-Hydro Code for Core-collapse in Massive Stars. II. The Implementation of Moving-mesh for Neutron Star Kicks

    Energy Technology Data Exchange (ETDEWEB)

    Nagakura, Hiroki [TAPIR, Walter Burke Institute for Theoretical Physics, Mailcode 350-17, California Institute of Technology, Pasadena, CA 91125 (United States); Iwakami, Wakana [Yukawa Institute for Theoretical Physics, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto, 606-8502 (Japan); Furusawa, Shun [Center for Computational Astrophysics, National Astronimical Observatory of Japan, Mitaka, Tokyo 181-8588 (Japan); Sumiyoshi, Kohsuke [Numazu College of Technology, Ooka 3600, Numazu, Shizuoka 410-8501 (Japan); Yamada, Shoichi [Advanced Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555 (Japan); Matsufuru, Hideo [High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 308-0801 (Japan); Imakura, Akira [University of Tsukuba, 1-1-1, Tennodai Tsukuba, Ibaraki 305-8577 (Japan)

    2017-04-01

    We present a newly developed moving-mesh technique for the multi-dimensional Boltzmann-Hydro code for the simulation of core-collapse supernovae (CCSNe). What makes this technique different from others is the fact that it treats not only hydrodynamics but also neutrino transfer in the language of the 3 + 1 formalism of general relativity (GR), making use of the shift vector to specify the time evolution of the coordinate system. This means that the transport part of our code is essentially general relativistic, although in this paper it is applied only to the moving curvilinear coordinates in the flat Minknowski spacetime, since the gravity part is still Newtonian. The numerical aspect of the implementation is also described in detail. Employing the axisymmetric two-dimensional version of the code, we conduct two test computations: oscillations and runaways of proto-neutron star (PNS). We show that our new method works fine, tracking the motions of PNS correctly. We believe that this is a major advancement toward the realistic simulation of CCSNe.

  13. Three-dimensional Boltzmann-Hydro Code for Core-collapse in Massive Stars. II. The Implementation of Moving-mesh for Neutron Star Kicks

    International Nuclear Information System (INIS)

    Nagakura, Hiroki; Iwakami, Wakana; Furusawa, Shun; Sumiyoshi, Kohsuke; Yamada, Shoichi; Matsufuru, Hideo; Imakura, Akira

    2017-01-01

    We present a newly developed moving-mesh technique for the multi-dimensional Boltzmann-Hydro code for the simulation of core-collapse supernovae (CCSNe). What makes this technique different from others is the fact that it treats not only hydrodynamics but also neutrino transfer in the language of the 3 + 1 formalism of general relativity (GR), making use of the shift vector to specify the time evolution of the coordinate system. This means that the transport part of our code is essentially general relativistic, although in this paper it is applied only to the moving curvilinear coordinates in the flat Minknowski spacetime, since the gravity part is still Newtonian. The numerical aspect of the implementation is also described in detail. Employing the axisymmetric two-dimensional version of the code, we conduct two test computations: oscillations and runaways of proto-neutron star (PNS). We show that our new method works fine, tracking the motions of PNS correctly. We believe that this is a major advancement toward the realistic simulation of CCSNe.

  14. Report of the special prosecutor: BC Hydro 'Raiwind' project

    International Nuclear Information System (INIS)

    Fraser, P. D. K.

    1999-10-01

    A special prosecutor has been appointed by the British Columbia Government to assist the Royal Canadian Mounted Police (RCMP) in its investigation, and to render appropriate charging decisions in the matter of the circumstances surrounding the creation of IPC International Power Corporation (IPC) owned by a Mr. John N. Laxton, former Chairman of BC Hydro and his two children, and its joint venture with BC Hydro for the development of an international power project in Pakistan known as the Raiwind project. Of particular concerns were the conflict of interest breached by Mr. Laxton in loaning a substantial sum of money to a principal member of the Pakistani side of the joint venture, and by the former President and CEO of BC Hydro, Mr. John Sheehan, by his purchase of shares of IPC by a company owned by members of his family. In 1996 Mr. Sheehan's employment as President and CEO was terminated by BC Hydro for breaching internal conflict of interest guidelines and for failing to get approval from BC Hydro for the acquisition of IPC shares. Subsequently, Mr. Sheehan commenced an action against BC Hydro for wrongful dismissal, a claim which was upheld by the Supreme Court of British Columbia. The focus of the special prosecutor's criminal investigation ultimately became the conduct of Mr. Laxton and whether a charge could or should be laid under Section 122 of the Criminal Code. The outcome of his investigation, which is discussed in this report, was that there was no substantial likelihood of conviction under the breach or trust provisions of Section 122 with respect to the indirect purchases by Mr. Laxton of shares in IPC. Nor was there any reason to believe that a personal loan made in high-risk circumstances could be a benefit or advantage to the lender. Furthermore, the loan cannot be causally related to any loss or financial harm to BC Hydro. In fact, it could be argued that Mr. Laxton's private decision to make the loan was of real assistance in ensuring that the

  15. Numerical calculation and analysis of single-curvature polyhedron hydro-bulging process for manufacturing spherical vessels

    International Nuclear Information System (INIS)

    Dong Jianling; Zhang Fengke; Yin Dejian

    2005-01-01

    Single-curvature polyhedron hydro-bulging technology is a new technology for manufacturing spherical vessels and it has a good application foreground. This technology has been used in practice. But the designing and manufacturing of polyhedron is based on experiences, and the final quality of spherical vessels cannot be forecast quantitatively. In the paper, the FEM code, MARC, is used to simulate the hydrobulging process of a single-curvature polyhedron, including loading and offloading. And the distributions of stress and strain are acquired as well as other important data. Comparing with the experimental results, it shows that single-curvature polyhedron hydro-bulging process can be simulated well by the FEM code. (authors)

  16. HydroShare: A Platform for Collaborative Data and Model Sharing in Hydrology

    Science.gov (United States)

    Tarboton, D. G.; Idaszak, R.; Horsburgh, J. S.; Ames, D. P.; Goodall, J. L.; Couch, A.; Hooper, R. P.; Dash, P. K.; Stealey, M.; Yi, H.; Bandaragoda, C.; Castronova, A. M.

    2017-12-01

    HydroShare is an online, collaboration system for sharing of hydrologic data, analytical tools, and models. It supports the sharing of and collaboration around "resources" which are defined by standardized content types for data formats and models commonly used in hydrology. With HydroShare you can: Share your data and models with colleagues; Manage who has access to the content that you share; Share, access, visualize and manipulate a broad set of hydrologic data types and models; Use the web services application programming interface (API) to program automated and client access; Publish data and models and obtain a citable digital object identifier (DOI); Aggregate your resources into collections; Discover and access data and models published by others; Use web apps to visualize, analyze and run models on data in HydroShare. This presentation will describe the functionality and architecture of HydroShare highlighting its use as a virtual environment supporting education and research. HydroShare has components that support: (1) resource storage, (2) resource exploration, and (3) web apps for actions on resources. The HydroShare data discovery, sharing and publishing functions as well as HydroShare web apps provide the capability to analyze data and execute models completely in the cloud (servers remote from the user) overcoming desktop platform limitations. The HydroShare GIS app provides a basic capability to visualize spatial data. The HydroShare JupyterHub Notebook app provides flexible and documentable execution of Python code snippets for analysis and modeling in a way that results can be shared among HydroShare users and groups to support research collaboration and education. We will discuss how these developments can be used to support different types of educational efforts in Hydrology where being completely web based is of value in an educational setting as students can all have access to the same functionality regardless of their computer.

  17. hydroPSO: A Versatile Particle Swarm Optimisation R Package for Calibration of Environmental Models

    Science.gov (United States)

    Zambrano-Bigiarini, M.; Rojas, R.

    2012-04-01

    Particle Swarm Optimisation (PSO) is a recent and powerful population-based stochastic optimisation technique inspired by social behaviour of bird flocking, which shares similarities with other evolutionary techniques such as Genetic Algorithms (GA). In PSO, however, each individual of the population, known as particle in PSO terminology, adjusts its flying trajectory on the multi-dimensional search-space according to its own experience (best-known personal position) and the one of its neighbours in the swarm (best-known local position). PSO has recently received a surge of attention given its flexibility, ease of programming, low memory and CPU requirements, and efficiency. Despite these advantages, PSO may still get trapped into sub-optimal solutions, suffer from swarm explosion or premature convergence. Thus, the development of enhancements to the "canonical" PSO is an active area of research. To date, several modifications to the canonical PSO have been proposed in the literature, resulting into a large and dispersed collection of codes and algorithms which might well be used for similar if not identical purposes. In this work we present hydroPSO, a platform-independent R package implementing several enhancements to the canonical PSO that we consider of utmost importance to bring this technique to the attention of a broader community of scientists and practitioners. hydroPSO is model-independent, allowing the user to interface any model code with the calibration engine without having to invest considerable effort in customizing PSO to a new calibration problem. Some of the controlling options to fine-tune hydroPSO are: four alternative topologies, several types of inertia weight, time-variant acceleration coefficients, time-variant maximum velocity, regrouping of particles when premature convergence is detected, different types of boundary conditions and many others. Additionally, hydroPSO implements recent PSO variants such as: Improved Particle Swarm

  18. Modelling the hydro-mechanical behaviour of swelling unsaturated soils; Modelisation du comportement hydromecanique des sols gonflants non satures

    Energy Technology Data Exchange (ETDEWEB)

    Mrad, M

    2005-10-15

    The use of compacted swelling soils in engineering practice is very widely spread, especially in geotechnical and environmental engineering. After their setup, these materials are likely to be subject to complex suction/stress paths involving significant variations of their hydro-mechanical properties which can affect their initial behaviour. It is important to be able to predict the hydro-mechanical behaviour of these materials taking into account the significant applications for which they are intended. Barcelona team developed a finite-element code (Code-Bright) for the thermo-hydro-mechanical coupling (THM) integrating the BBM elastoplastic model for unsaturated soils based on the independent variables approach. This model is recognized to correctly describe the hydro-mechanical behaviour of unsaturated soils but fails to take into account some particular observed aspects on swelling soils. A second model BExM was then proposed to address these aspects. The objective of this study is: (i) to implement the elastoplastic model BExM for the unsaturated swelling soils in the finite-element code (Code-Bright); (ii) to check the numerical model validity through the numerical simulation of laboratory tests made on swelling soils; and (iii) to apply this model to some practical problems. For this purpose, a new family of numerical procedures adapted to the BExM model was introduced into the code. The equation of the yield surface of this model for a given deviatoric stress states was given in a manner to facilitate calculations of its derivatives. The model was checked by the numerical simulation of suction-controlled odometric tests made on three different swelling soils. The simulation results showed that the numerical model is able to correctly reproduce the experimental data. Lastly, the model was applied to two practical problems: radioactive waste repository in deep geological layers and a shallow footing under the action of a swelling soil. The results obtained

  19. Investigation research on the evaluation of a coupled thermo-hydro-mechanical-chemical phenomena. Outline report

    International Nuclear Information System (INIS)

    Chijimatsu, Masakazu; Amemiya, Kiyoshi; Neyama, Atsushi; Iwata, Hiroshi; Nakagawa, Koichi; Ishihara, Yoshinao; Shiozaki, Isao; Sagawa, Hiroshi

    2002-02-01

    In order to realize a coupling analysis in the near field of the geological disposal system, this study has been studied on the addition of the mass transport model to the coupled thermo-hydro-mechanical analysis code (THAMES) and preliminary coupling analysis by using development environmental tool (Diffpack) for numerical analysis. (1) In order to prepare the strategy on the addition of the mass transport model to the coupled thermo-hydro-mechanical analysis code (THAMES), we have studied on the requirement of THAMES-Transport and methodology of coupling analysis. After that we set out modification plan by the Eulerian-Lagrangian (EL) method. (2) Based on the document of modification plan, we have done addition of the mass transport model to the coupled thermo-hydro-mechanical analysis code (THAMES) and carried out verification analysis in order to confirm on the accuracy of THAMES-Transport. (3) In order to understand on the behavior of NaCl in the porewater under the coupled thermo-hydro-mechanical phenomena in the HLW engineered barrier system, we have calculated coupling phenomenon by using THAMES-Transport. Transportation and concentration phenomena of NaCl are calculated but precipitation of NaCl is not occurred under the analysis conditions in this report. (4) In order to confirm about feasibility of coupling analysis under the development environmental tool (Diffpack) for numerical analysis, we have carried out on the design work and writing program of the preliminary coupling system. In this study, we have adopted existing transport model (HYDROGEOCHEM) and geochemical model (phreeqe60) for preliminary coupling system. (5) In order to confirm program correctness of preliminary coupling system, we have carried out benchmarking analysis by using existing reactive-transport analysis code (HYDROGEOCHEM). (6) We have been prepared short-range development plan based on through the modification study of THAMES and writing program of the preliminary coupling

  20. Investigation research on the evaluation of a coupled thermo-hydro-mechanical-chemical phenomena. Result report

    International Nuclear Information System (INIS)

    Chijimatsu, Masakazu; Amemiya, Kiyoshi; Shiozaki, Isao; Neyama, Atsushi; Iwata, Hiroshi; Nakagawa, Koichi; Ishihara, Yoshinao; Sagawa, Hiroshi

    2002-02-01

    In order to realize a coupling analysis in the near field of the geological disposal system, this study has been studied on the addition of the mass transport model to the coupled thermo-hydro-mechanical analysis code (THAMES) and preliminary coupling analysis by using development environmental tool (Diffpack) for numerical analysis. (1) In order to prepare the strategy on the addition of the mass transport model to the coupled thermo-hydro-mechanical analysis code (THAMES), we have studied on the requirement of THAMES-Transport and methodology of coupling analysis. After that we set out modification plan by the Eulerian-Lagrangian (EL) method. (2) Based on the document of modification plan, we have done addition of the mass transport model to the coupled thermo-hydro-mechanical analysis code (THAMES) and carried out verification analysis in order to confirm on the accuracy of THAMES-Transport. (3) In order to understand on the behavior of NaCl in the porewater under the coupled thermo-hydro-mechanical phenomena in the HLW engineered barrier system, we have calculated coupling phenomenon by using THAMES-Transport. Transportation and concentration phenomena of NaCl are calculated but precipitation of NaCl is not occurred under the analysis conditions in this report. (4) In order to confirm about feasibility of coupling analysis under the development environmental tool (Diffpack) for numerical analysis, we have carried out on the design work and writing program of the preliminary coupling system. In this study, we have adopted existing transport model (HYDROGEOCHEM) and geochemical model (phreeqe 60) for preliminary coupling system. (5) In order to confirm program correctness of preliminary coupling system, we have carried out benchmarking analysis by using existing reactive-transport analysis code (HYDROGEOCHEM). (6) We have been prepared short-range development plan based on through the modification study of THAMES and writing program of the preliminary coupling

  1. Hydro under shock

    International Nuclear Information System (INIS)

    Maffezzini, I.; Pineault, E.; Poirier, M.

    1997-01-01

    A discussion of the potential privatisation of Hydro-Quebec, and of the motivation to do so, was presented. The creation of Hydro-Quebec resulted from the nationalization in 1963 of all major electricity producers in the province of Quebec. Since its inception, Hydro-Quebec has gone through many episodes of restructuring but none more far reaching in extent, or in consequences, than the present one. The current deregulation of the electrical industry in Quebec, and the potential commercialization of Hydro-Quebec is considered to be a natural and inevitable result of the current global trend towards competition in the power industry and the demand for greater consumer choice. 1 tab

  2. Hydro-climatology

    DEFF Research Database (Denmark)

    The hydro-climatological approach of this volume illustrates the scientific and practical value of considering hydrological phenomena and processes in a climate context to improve understanding of controls, process interaction, and past and future variability/change. Contributions deal with under......The hydro-climatological approach of this volume illustrates the scientific and practical value of considering hydrological phenomena and processes in a climate context to improve understanding of controls, process interaction, and past and future variability/change. Contributions deal...... considered. The interdisciplinary approach reveals information and perspective that go beyond the study of cli ate and hydro gy alone...

  3. Ontario Hydro's nuclear program

    International Nuclear Information System (INIS)

    McCredie, J.

    1984-01-01

    This report briefly describes Ontario Hydro's nuclear program, examining the design and construction status, and the future from Ontario Hydro's perspective. Ontario Hydro relies heavily on nuclear power. Nuclear fuel was responsible for approximately 34% of Ontario Hydro's energy production in 1983. The nuclear proportion was supplied by twelve operating units located: NPD, Douglas Point, Pickering A and B. It is expected that by approximately 1992, 65% of the total energy needs will be generated through nuclear power

  4. HydroSoft coil versus HydroCoil for endovascular aneurysm occlusion study: A single center experience

    International Nuclear Information System (INIS)

    Guo Xinbin; Fan Yimu; Zhang Jianning

    2011-01-01

    Background and purpose: The HydroCoil Embolic System (HES) was developed to reduce recurrences of aneurysms relative to platinum coils. But the HydroCoil Embolic System was characterized with many limitations. The manufacturer had recognized the challenge and recently a new design of hydrogel-coated coil-HydroSoft has become available in the market as the new generation HydroCoil. We reported our initial experience using HydroSoft coil versus HydroCoil in our center. Methods: 75 aneurysms embolized primarily using HydroSoft Coils from July 2008 to May 2009 were compared with 66 volume- and shape-matched aneurysms treated with HydroCoils from March 2006 to August 2008. Outcome measures included length and number of coils used, contrast volume, and length of hospital stay. During embolization, a stable framework was first established with bare coils, and hydrogel-coated coils were used subsequently to increase the packing density. Follow-up angiographic results 6 months after treatment were evaluated among some of the patients. Results: Successful coil embolization was achieved in all patients. There were no differences in average total coil length used per aneurysm. There were no differences in length of hospital stay and packing density. HydroSoft coils were more suitable using as the finishing or final coil. HydroSoft coil decreased the procedure-related retreated rates, and aneurysm packing was finished with soft, flexible HydroSoft coil and decreased the neck remnant rates. Follow-up angiography in HydroSoft-treated patients at 6 months revealed aneurysm stability without significant residual neck. Conclusions: HydroSoft coil allowed us to deploy coated coils with good packing density. A slight expansion of these coils at the neck can be expected to reduce neck remnant and potentially inhibit recurrence.

  5. Hydro-thermo-mechanical response of a fractured rock block

    International Nuclear Information System (INIS)

    Kelkar, S.; Zyvoloski, G.

    1990-01-01

    Hydro-thermo-mechanical effects in fractured rocks are important in many engineering applications and geophysical processes. Modeling these effects is made difficult by the fact that the governing equations are nonlinear and coupled, and the problems to be solved are three dimensional. In this paper we describe a numerical code developed for this purpose. The code is finite element based to allow for complicated geometries, and the time differencing is implicit, allowing for large time steps. The use of state-of-the-art equation solvers has resulted in a practical code. The code is capable of fully three dimensional simulations, however, in this paper we consider only the case of two dimensional heat and mass flow coupled to one dimensional deformation. Partial verification of the code is obtained by comparison with published semianalytical results. Several examples are presented to demonstrate the effects of matrix expansion, due to pore pressure and heating, on fracture opening due to fluid injection. 16 refs., 11 figs

  6. 76 FR 67175 - Riverbank Hydro No. 2 LLC, Lock Hydro Friends Fund XXXVI, Arkansas Electric Cooperative Corp...

    Science.gov (United States)

    2011-10-31

    ...; 14149-000] Riverbank Hydro No. 2 LLC, Lock Hydro Friends Fund XXXVI, Arkansas Electric Cooperative Corp... Lock Hydro Friends Fund XXXVI (Lock Hydro) and on April 11, 2011, Arkansas Electric Cooperative Corp... & Dam No. 3, as directed by the Corps. Applicant Contact: Mr. Wayne F. Krouse, Hydro Green Energy, 5090...

  7. Hydro-energy

    International Nuclear Information System (INIS)

    Bacher, P.; Tardieu, B.

    2005-01-01

    The first part of this study concerns the different type of hydraulic works. The second part presents the big hydro-energy, its advantages and disadvantages, the industrial risks, the electric power transport network, the economy and the development perspectives. The third part presents the little hydro-energy, its advantages and disadvantages, the decentralized production and the development perspectives. (A.L.B.)

  8. Ontario Hydro's DSP update

    International Nuclear Information System (INIS)

    Anon.

    1992-01-01

    Ontario Hydro's Demand/Supply Plan (DSP), the 25 year plan which was submitted in December 1989, is currently being reviewed by the Environmental Assessment Board (EAB). Since 1989 there have been several changes which have led Ontario Hydro to update the original Demand/Supply Plan. This information sheet gives a quick overview of what has changed and how Ontario Hydro is adapting to that change

  9. 78 FR 56224 - Hydro Nelson, Ltd.; Hydro-WM, LLC; Notice of Transfer of Exemption

    Science.gov (United States)

    2013-09-12

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project No. 3401-049] Hydro Nelson, Ltd.; Hydro-WM, LLC; Notice of Transfer of Exemption 1. By documentation filed July 8, 2013 and supplemented... Hydro-WM, LLC. The project is located on the Rockfish River in Nelson County, Virginia. The transfer of...

  10. Provincial hydro expansions

    Energy Technology Data Exchange (ETDEWEB)

    Froschauer, K J

    1993-01-01

    A study of the development of five provincial hydroelectric utilities in Canada indicates that power companies and the state invited manufacturers to use hydroelectricity and natural resources in order to diversify provincial economies. These hydro expansions also show that utilities and government designed hydro projects to serve continental requirements; serving both objectives became problematic. It is argued that when the Canadian state and firms such as utilities use hydro expansions to serve both continentalism and industrialization, then at best they foster dependent industrialization and staple processing. At worst, they overbuild the infrastructure to generate provincial surplus energy for continental, rather than national, integration. Hydro developments became subject to state intervention in Canada mainly through the failures of private utilities to provide power for the less-lucrative industrial markets within provincial subregions. Although the state and utilities invited foreign firms to manufacture hydro equipment within the provinces and others to use electricity to diversify production beyond resource processing, such a diversification did not occur. Since 1962, ca 80% of industrial energy was used to semi-process wood-derived products, chemicals, and metals. The idea for a national power network became undermined by interprovincial political-economic factors and since 1963, the federal national/continential power policy prevailed. 187 refs., 6 figs., 52 tabs.

  11. Short-term hydro generation scheduling of Xiluodu and Xiangjiaba cascade hydropower stations using improved binary-real coded bee colony optimization algorithm

    International Nuclear Information System (INIS)

    Lu, Peng; Zhou, Jianzhong; Wang, Chao; Qiao, Qi; Mo, Li

    2015-01-01

    Highlights: • STHGS problem is decomposed into two parallel sub-problems of UC and ELD. • Binary coded BCO is used to solve UC sub-problem with 0–1 discrete variables. • Real coded BCO is used to solve ELD sub-problem with continuous variables. • Some heuristic repairing strategies are designed to handle various constraints. • The STHGS of Xiluodu and Xiangjiaba cascade stations is solved by IB-RBCO. - Abstract: Short-term hydro generation scheduling (STHGS) of cascade hydropower stations is a typical nonlinear mixed integer optimization problem to minimize the total water consumption while simultaneously meeting the grid requirements and other hydraulic and electrical constraints. In this paper, STHGS problem is decomposed into two parallel sub-problems of unit commitment (UC) and economic load dispatch (ELD), and the methodology of improved binary-real coded bee colony optimization (IB-RBCO) algorithm is proposed to solve them. Firstly, the improved binary coded BCO is used to solve the UC sub-problem with 0–1 discrete variables, and the heuristic repairing strategy for unit state constrains is applied to generate the feasible unit commitment schedule. Then, the improved real coded BCO is used to solve the ELD sub-problem with continuous variables, and an effective method is introduced to handle various unit operation constraints. Especially, the new updating strategy of DE/best/2/bin method with dynamic parameter control mechanism is applied to real coded BCO to improve the search ability of IB-RBCO. Finally, to verify the feasibility and effectiveness of the proposed IB-RBCO method, it is applied to solve the STHGS problem of Xiluodu and Xiangjiaba cascaded hydropower stations, and the simulating results are compared with other intelligence algorithms. The simulation results demonstrate that the proposed IB-RBCO method can get higher-quality solutions with less water consumption and shorter calculating time when facing the complex STHGS problem

  12. A comparison of the aquatic impacts of large hydro and small hydro projects

    Science.gov (United States)

    Taylor, Lara A.

    The expansion of small hydro development in British Columbia has raised concerns surrounding the effects of these projects, and the provincial government's decision to proceed with Site C has brought attention to the impacts of large hydro. Together, these decisions highlight that there are impacts associated with all energy development. My study examines the aquatic effects of large and small hydro projects using two case study sites: Site C and the Upper Harrison Water Power Project. I first determine the aquatic effects of each of the case study sites. Next, I use existing literature and benefits transfer to determine the monetary value of these effects. My results suggest that, with mitigation, small hydro projects have less of an effect on the environment than a large hydro project per unit of electricity. I also describe the implications of my study in the context of current British Columbia energy policy. Keywords: hydropower; aquatic effects. Subject Terms: environmental impact assessment; benefits transfer.

  13. Integrated operation of hydro thermal system

    International Nuclear Information System (INIS)

    Nanthakumar, J.

    1994-01-01

    Long-term power system expansion planning studies are carried out to meet the electricity requirement in the future. Prior to the expansion planning studies, it is essential to know the energy potential of the existing generating system, especially the hydro power plants. Detailed hydro thermal stimulation studies of the integrated system is therefore carried out to determine the best way to maximise the hydro energy of the existing and committed plants. The results of the integrated system simulated model are stored in numerous files and are available for retrieval. Most important output used for expansion analysis is the energy production of each hydro plant. The annual hydro energy potential of the total hydro system of Sri Lanka for the hydrological year from 1949 to 1988 is given. Hydro condition data with different probability levels are also indicated

  14. Strategies for growth of hydro electric power

    International Nuclear Information System (INIS)

    Khera, D.V.

    1998-01-01

    Hydro power on account of its several inherent advantages has a key role to play in the development of long term energy strategies based on diversified and balance use of natural national resources. Our country is fortunate to be endowed with large hydro-electric potential. It is estimated that the hydro potential while fully developed may yield to an installed capacity of 1,50,000 MW. An attempt has been made in this paper to examine and analyse the status and trend of hydro power development, need for accelerated development of hydro power, myths about hydro electric projects, principal causes responsible for scaling down of hydro share in the total installed capacity and strategies which could restore optimum hydro thermal mix. (author)

  15. Home grown hydro, part 1: Hydro development in Canada key to regional, international business expansion

    International Nuclear Information System (INIS)

    Wiebe, P.A.

    1994-01-01

    Canada has had a long and successful record of hydroelectric power development since the first hydraulic generators were installed at Chaudiere Falls near Ottawa in 1881. Canadian hydro engineers have demonstrated their ability to develop and manage higher voltages, longer transmission networks, larger projects, remote sites, and undersea cable technology. Canada has earned a reputation for excellence in the hydro industry and is successful at exporting its expertise to develop hydro resources in the international market. A prominent example is provided by the Three Gorges Project in China, for which the Chinese Ministry of Energy searched for the best foreign engineers to prepare a feasibility report. A Canadian team that integrated the expertise of hydro consultants, utilities, and major equipment suppliers was chosen to prepare the report, winning over teams from the USA, Brazil, and Europe. Success in this initiative is attributed to Canada's ability to demonstrate the favorable application of new technology at James Bay. Domestic hydro projects are thus seen as crucial in efforts to expand into international markets. However, Canada's new completed hydro capacity has fallen dramatically since 1986, and Canadian hydro contractors have tended to remain domestic operators with little incentive to enter foreign markets. By having the foresight to begin new hydro developments now, Canada would benefit from increased employment and orders for equipment, and would ensure a continuing base of technical expertise and innovation in the electrical industry. 2 figs

  16. Home grown hydro, part 1: Hydro development in Canada key to regional, international business expansion

    Energy Technology Data Exchange (ETDEWEB)

    Wiebe, P.A

    1994-06-01

    Canada has had a long and successful record of hydroelectric power development since the first hydraulic generators were installed at Chaudiere Falls near Ottawa in 1881. Canadian hydro engineers have demonstrated their ability to develop and manage higher voltages, longer transmission networks, larger projects, remote sites, and undersea cable technology. Canada has earned a reputation for excellence in the hydro industry and is successful at exporting its expertise to develop hydro resources in the international market. A prominent example is provided by the Three Gorges Project in China, for which the Chinese Ministry of Energy searched for the best foreign engineers to prepare a feasibility report. A Canadian team that integrated the expertise of hydro consultants, utilities, and major equipment suppliers was chosen to prepare the report, winning over teams from the USA, Brazil, and Europe. Success in this initiative is attributed to Canada's ability to demonstrate the favorable application of new technology at James Bay. Domestic hydro projects are thus seen as crucial in efforts to expand into international markets. However, Canada's new completed hydro capacity has fallen dramatically since 1986, and Canadian hydro contractors have tended to remain domestic operators with little incentive to enter foreign markets. By having the foresight to begin new hydro developments now, Canada would benefit from increased employment and orders for equipment, and would ensure a continuing base of technical expertise and innovation in the electrical industry. 2 figs.

  17. [Ontario Hydro]. Corporate performance report, 1994

    International Nuclear Information System (INIS)

    1995-01-01

    Summarizes Ontario Hydro's corporate performance for the year, with actual results being compared against planned values. Also includes additional indicators that illustrate noteworthy trends in corporate performance. Corporate results are reported under the new organizational structure implemented in 1993, beginning with overall results in such areas as customer service, environmental stewardship, human resources, and finance. This is followed by reports from the Generation Business Group, Customer Services Group, Corporate Business Group, General Counsel and Secretary, Ontario Hydro Audit, Strategic Planning, Environment and Communication Group, and Ontario Hydro enterprises (Ontario Hydro Technologies, Ontario Hydro International). The appendix includes summary financial statements

  18. Small hydro

    International Nuclear Information System (INIS)

    Bennett, K.; Tung, T.

    1995-01-01

    A small hydro plant in Canada is defined as any project between 1 MW and 15 MW but the international standard is 10 MW. The global market for small hydro development was considered good. There are some 1000 to 2000 MW of generating capacity being added each year. In Canada, growth potential is considered small, primarily in remote areas, but significant growth is anticipated in Eastern Europe, Africa and Asia. Canada with its expertise in engineering, manufacturing and development is considered to have a good chance to take advantage of these growing markets

  19. Micro Hydro-Electric Energy Generation- An Overview

    OpenAIRE

    S. O. Anaza; M. S. Abdulazeez; Y. A. Yisah; Y. O. Yusuf; B. U. Salawu; S. U. Momoh

    2017-01-01

    Energy is required now more than ever due to population growth, industrialization and modernization. Challenges such as carbon dioxide (CO2) emissions and depletion of conventional source of energy necessitate for renewable sources, of which hydro energy seems to be the most predictable. Micro-hydro which is hydro energy in a “small” scale provides electricity to small communities by converting hydro energy into electrical energy. This paper is an overview of micro-hydro system by reviewing s...

  20. The Aster code; Code Aster

    Energy Technology Data Exchange (ETDEWEB)

    Delbecq, J.M

    1999-07-01

    The Aster code is a 2D or 3D finite-element calculation code for structures developed by the R and D direction of Electricite de France (EdF). This dossier presents a complete overview of the characteristics and uses of the Aster code: introduction of version 4; the context of Aster (organisation of the code development, versions, systems and interfaces, development tools, quality assurance, independent validation); static mechanics (linear thermo-elasticity, Euler buckling, cables, Zarka-Casier method); non-linear mechanics (materials behaviour, big deformations, specific loads, unloading and loss of load proportionality indicators, global algorithm, contact and friction); rupture mechanics (G energy restitution level, restitution level in thermo-elasto-plasticity, 3D local energy restitution level, KI and KII stress intensity factors, calculation of limit loads for structures), specific treatments (fatigue, rupture, wear, error estimation); meshes and models (mesh generation, modeling, loads and boundary conditions, links between different modeling processes, resolution of linear systems, display of results etc..); vibration mechanics (modal and harmonic analysis, dynamics with shocks, direct transient dynamics, seismic analysis and aleatory dynamics, non-linear dynamics, dynamical sub-structuring); fluid-structure interactions (internal acoustics, mass, rigidity and damping); linear and non-linear thermal analysis; steels and metal industry (structure transformations); coupled problems (internal chaining, internal thermo-hydro-mechanical coupling, chaining with other codes); products and services. (J.S.)

  1. Small hydro: Policy and potential in Spain

    International Nuclear Information System (INIS)

    Gutierrez, C.

    2001-01-01

    In Spain, the benefits of small-scale (less than 10 MW) hydro are apparently rarely appreciated and there is little support from European institutions. The article suggests that small hydro technology can make a significant contribution to the country's energy requirements and create employment, provided certain obstacles can be removed. Data on the number of small hydros in Spain, and of recent installations are given; the share of hydro in Spain's total energy production is 2.5%. The low environmental impact of hydro is extolled, and the conclusions of a recent study of 'environmental impacts of the production of electricity' are listed. There are said to be unreasonable administrative obstacles; for example, it is more difficult to obtain permission to refurbish a 100 kW hydro plant in Castilla y Leon than it is to install a 30,000 kW gas plant. Some details relating to the affect of hydro on aquatic ecosystems, noise levels, and water quality, are given

  2. BC hydro: Annual report, 1991-1992

    Energy Technology Data Exchange (ETDEWEB)

    1992-01-01

    The third largest electric utility in Canada, B.C. Hydro services almost 1.3 million customers in an area containing over 92 per cent of British Columbia's population. B.C. Hydro's mission is to generate, transmit and distribute electricity. This annual report covers the business and financial performance of B.C. Hydro, and financial statistics.

  3. Analyze the factors effecting the development of hydro power projects in hydro rich regions of India

    Directory of Open Access Journals (Sweden)

    Ameesh Kumar Sharma

    2016-09-01

    Full Text Available Power is considered as the major back bone for all the nations throughout the world including India on the basis of which development of the country depends. If a country has the resources to generate the power at competitive price in that case the people of the country get the benefits in terms of improvement in their social and economical life. When we talk about India, various locations in the country where still there is no electricity people are living in dark without having the access of the modern technology. The total hydro power potential of India is 1, 50,000 MW out of this total hydro potential only 40,195 MW is exploited till 2014. More than 80% of the total hydro potential of the country is lying in the western Himalayan states (Jammu and Kashmir, Himachal Pradesh, Uttrakhand and Arunachal Pradesh. Small hydro projects are also playing a very important role in the modern world for the development of the remote areas which are not main grid connected specially in western Himalayan region of India. India has a total potential 19,749 MW of small hydro projects and of this total potential only 3990.9 MW harnessed till 2014. Ministry of new and renewable energy in India is also providing special incentives to hydro rich states of India. In this research article we are taken the case study of the small hydro projects in the western Himalayan region because theses states are having vast small hydro potential which is still needed to be harnessed. So, it is very important to identify the factors which are effecting the development of these small ventures especially in western Himalayan region in India.

  4. Hydro-Quebec strategic plan 2006-2010

    International Nuclear Information System (INIS)

    2006-01-01

    Hydro-Quebec produces, transmits and distributes electricity through the use of renewable energy sources, particularly hydroelectricity. It also conducts research in energy related fields. This document listed the strategic plan for Hydro-Quebec's 4 main divisions: Hydro-Quebec Production, Hydro-Quebec TransEnergie, Hydro-Quebec Distribution and Hydro-Quebec Energy Society of Bay James. The 2006 to 2010 strategic plan continues to focus on 3 main priorities: energy efficiency; complementary development of hydroelectricity and wind power; and, technological innovation. Hydro-Quebec's objectives also include strengthening the security of Quebec's energy supply and making use of energy as a lever for economic development. The plan for Hydro-Quebec Production calls for accelerating the development of major hydroelectric projects and promoting other renewable forms of energy such as wind power and ensuring the efficiency and reliability of the generating fleet. The utility's objective is to reach 4.7 TWh in energy savings by 2010 and to work toward a target of 8 TWh by 2015. The plan also involves a portfolio of hydroelectric projects totaling 5,400 MW. The plan includes complementary development and integration of 4,000 MW of windpower by 2015. The plan for Hydro-Quebec TransEnergie calls for system reliability and becoming a world benchmark for quality and reliability in wind power integration and deployment of new technologies to enhance performance. The plan for Hydro-Quebec Distribution calls for more efficient use of electricity, increase customer satisfaction and meet electricity needs through the use of renewable energy sources. The utility has made a commitment for 2006 to 2010 to a net income of $2.5 billion per year for a total of $12.5 billion, and a capital investment of 19.4 billion. This paper outlined the contribution of each division to net income and listed the economic benefits for the 2006 to 2010 period. In 2006, the Quebec Energy Board authorized

  5. Optimal control systems in hydro power plants

    International Nuclear Information System (INIS)

    Babunski, Darko L.

    2012-01-01

    The aim of the research done in this work is focused on obtaining the optimal models of hydro turbine including auxiliary equipment, analysis of governors for hydro power plants and analysis and design of optimal control laws that can be easily applicable in real hydro power plants. The methodology of the research and realization of the set goals consist of the following steps: scope of the models of hydro turbine, and their modification using experimental data; verification of analyzed models and comparison of advantages and disadvantages of analyzed models, with proposal of turbine model for design of control low; analysis of proportional-integral-derivative control with fixed parameters and gain scheduling and nonlinear control; analysis of dynamic characteristics of turbine model including control and comparison of parameters of simulated system with experimental data; design of optimal control of hydro power plant considering proposed cost function and verification of optimal control law with load rejection measured data. The hydro power plant models, including model of power grid are simulated in case of island ing and restoration after breakup and load rejection with consideration of real loading and unloading of hydro power plant. Finally, simulations provide optimal values of control parameters, stability boundaries and results easily applicable to real hydro power plants. (author)

  6. Hydro-power: a long history, a bright future

    Energy Technology Data Exchange (ETDEWEB)

    Deudney, D

    1981-07-01

    A brief history of the spread of hydro-power in the world was given. Tables showing hydro-power potential and use, and the % electricity from hydro-power for 13 countries were included along with a graph showing % hydro-power operating, planned and under construction by region. The need for committed and farsighted political leadership for future development and the possibility of hydro production reaching 4 to 6 times its present level were discussed.

  7. 77 FR 77070 - Black Bear Hydro Partners, LLC;

    Science.gov (United States)

    2012-12-31

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project No. 2727-086] Black Bear Hydro...: October 24, 2012. d. Submitted By: Black Bear Hydro Partners, LLC (Black Bear Hydro). e. Name of Project... designating Black Bear Hydro as the Commission's non-federal representative for carrying out informal...

  8. New markets for small-scale hydro

    International Nuclear Information System (INIS)

    Maurer, E.A.

    1997-01-01

    The market for small and medium sized hydro-electric power plant is more attractive than ever. The boom in Europe has increasingly spread to the emerging countries, and here too small hydro plays an important ecological role. In addition to new plant rehabilitation of 'historical' plant is now a major factor. The last few years have seen a market shift from single machine components to complete plant and systems, requiring a strategy re-think on the part of larger companies. Following the influx of private capital into the power industry, business conditions have also undergone a thorough transformation. In place of 'fast money', hydro power offers the prospect of earning longer-term, sustainable money'. The term small-scale hydro-electric power (or simply 'small hydro') is used slightly differently depending on the country and market. Here, it is used to denote plant with turbines up to 10 MW. (Author)

  9. [Ontario Hydro]. Corporate performance report, 1993

    International Nuclear Information System (INIS)

    1994-01-01

    Summarizes Ontario Hydro's corporate performance for the year, with actual results being compared against planned values established in the approved corporate financial plan and work program budget. Also includes additional indicators that illustrate noteworthy trends in corporate performance. Corporate results are reported under the new organizational structure implemented in mid-1993, beginning with overall results in such areas as customer satisfaction, electricity sales, human resources, and environmental protection. This is followed by reports from the Electricity Group (supply, generation, transmission), the Energy Services and Environment Group (load saved and shifted, non-utility generation, retail distribution), and Ontario Hydro enterprises (Ontario Hydro Technologies, Ontario Hydro International). The appendix contains summary financial statements

  10. Standardized CSR and climate performance: why is Shell willing, but Hydro reluctant?; Shell; Hydro

    Energy Technology Data Exchange (ETDEWEB)

    Boasson, Elin Lerum; Wettestad, Joergen

    2007-06-15

    This report aims to contribute to the ongoing discussion concerning whether CSR merely serves to streamline company rhetoric or also has an influence on actual efforts. We discuss the tangible effects of CSR instruments on the climate-related rules and performances of the two different oil companies Hydro and Shell. First we explore whether similar CSR instruments lead to similar climate-related rules and practices in the two companies. Both Hydro and Shell adhere to the Global Compact (GC), the Global Reporting Initiative (GRI), the Carbon Disclosure Project (CDP) and the Global Gas Flaring Reduction Public-Private Partnership (GGFR). The report concludes that the GC has not rendered any tangible effects in either of the companies. Concerning the other instruments, Hydro has only followed the instrument requirements that fit their initial approach, and refrained from all deviating requirements. Shell has been more malleable, but we have noted few effects on the actual emissions and business portfolio resulting from the instrument adherence. Second, we assess how the differing results of the similar CSR portfolio may be explained. The reluctant attitude of the leaders in Hydro and the strong CSR motivation of Shell's executives result in significant differences. Hydro executives are able to constrain the effects of the instrument adherence. With Shell we note the opposite pattern: Its leaders promoted the instruments to be translated into internal rules, but a general lack of hierarchical structures hinders them from governing the conduct of various sub-organisations. The very diversity of the Shell culture helps to explain why the efforts of its executives have resulted in limited impact. The strength of the Hydro culture makes the corporation resistant to the instruments. Moreover, Hydro is strikingly shielded by virtue of its strong position in Norway. In contrast, Shell is more strongly affected by the global field of petroleum and the global field of CSR

  11. Good prospects for Portuguese small hydro industry

    International Nuclear Information System (INIS)

    Betamio de Almeida, A.; Serranho, H.

    2000-01-01

    The article outlines the history of hydro in Portugal and discusses the current position of small-scale hydro with particular reference to the Portuguese Small Hydro Association (AMPH). Encouraged by legislation, and the Valoren community programme (which defined investment incentives), many new small hydro projects sprang up in Portugal in the 1990s. In some areas of Portugal the water levels were higher than the urban centres where the water is required: how the problems of integrating power and water were addressed is described. The integration of power and irrigation schemes is also mentioned. In the wake of great expansion in the Portuguese hydro industry, there was a sharp reduction (in 1995-6) and the reasons for that are listed. The 1999 tariff was such that it is likely that small hydro will provide 3.8% of the electric power consumed nationally by 2010

  12. Hydro-energy; Energie hydraulique

    Energy Technology Data Exchange (ETDEWEB)

    Bacher, P. [Electricite de France (EDF), 75 - Paris (France); Tardieu, B. [Coyne et Bellier, 92 - Gennevilliers (France)

    2005-07-01

    The first part of this study concerns the different type of hydraulic works. The second part presents the big hydro-energy, its advantages and disadvantages, the industrial risks, the electric power transport network, the economy and the development perspectives. The third part presents the little hydro-energy, its advantages and disadvantages, the decentralized production and the development perspectives. (A.L.B.)

  13. Hydro-power

    International Nuclear Information System (INIS)

    Piro, P.

    2010-01-01

    On average the hydro-power sector produces 12% of the electrical power in France. A quarter of this production might pass to another operator than EDF because the end of some grants is nearing (2012 for 12 installations). In France the power of rivers belongs to the state that gives operators grants to harness it. The allowance lasts 75 years usually but for installations below 4.5 MW a permanent and definitive grant is allowed. Most installations are ancient and their investment have been paid off since a long, so hydro-power is the most profitable renewable energy in France. A lot of bidders are expected. Each bid will be assessed on 3 criteria: -) the global energy efficiency of the waterfall, -) a balanced management of the water resource, and -) an economic and financial offer to the state. The balance between the different uses of water is getting more delicate to reach and this renewal of grants will be an opportunity for the state to impose a better preservation of the environment. In July 2008, the French government announced a program for the re launching of the hydro-power, this program has been reduced and now only 3000 GWh supplementary are expected by 2020. (A.C.)

  14. Hydro-thermal power flow scheduling accounting for head variations

    International Nuclear Information System (INIS)

    El-Hawary, M.E.; Ravindranath, K.M.

    1992-01-01

    In this paper the authors treat the problem of optimal economic operation of hydrothermal electric power systems with variable head hydro plants employing the power flow equations to represent the network. Newton's method is used to solve the problem for a number of test systems. A comparison with solutions with fixed head is presented. In general the optimal schedule requires higher slack bus and thermal power generation and cost in the case of variable head hydro plant than that required by the fixed head hydro plant in all demand periods. Correspondingly, the hydro generation is less in the case of variable head hydro plant compared to fixed head hydro plant. A negligible difference in voltage magnitudes in all the time intervals, but it is observed that slightly higher voltages occur in the case of the fixed head hydro plant. Higher power and energy losses occur in the case of variable head hydro plants compared to the fixed head hydro plants

  15. Hydro One 2002 annual report

    International Nuclear Information System (INIS)

    2003-01-01

    Financial information from Hydro One was presented and a review of its 2002 operations was made available for the benefit of shareholders. Hydro One is the largest electricity delivery company in Ontario and one of the largest in North America. It began operation in 1999 after Ontario Hydro restructured its delivery and generation entities. Hydro One now includes power transmission, power distribution and telecom, with transmission and distribution operations representing 99 per cent of its business. This report indicates that in 2002, the utility had strong financial performance with $344 million in net income. The utility met its health and safety targets, and established a customer advisory board to improve customer satisfaction. A layer of management at the executive level was eliminated to stream-line decision-making and enhance productivity. The electricity network was upgraded and maintained through $546 million in capital expenditures. Non-core functions were sold to ensure a better focus on the core business of electricity delivery. This report presents an operations review as well as consolidated financial statements and common share information including the accounts of Hydro One and its share of assets, liabilities, revenues, expenses and cash flows. Revenue and expenditure statements were summarized by source. tabs., figs

  16. Ontario Hydro annual report 1985

    International Nuclear Information System (INIS)

    1986-04-01

    Ontario Hydro is a corporation without share capital created by a special statute of the Province of Ontario in 1906. It now operates under the authority of the Power Corporation Act, R.S.O. 1980, Chapter 384, as amended, with broad powers to generate, supply and deliver electric power throughout the province. It is also authorized to produce and sell steam and hot water as primary products. The Corporation's prime objective is to supply the people of Ontario with electricity at the lowest feasible cost consistent with high safety and quality of service standards. Ontario Hydro's main activity is wholesaling electric power to municipal utilities in urban areas who, in turn, retail it to customers in their service areas. In 1985, approximately 3,166,000 customers were served by Ontario Hydro and the municipal utilities in the province. Ontario Hydro operates 81 hydraulic, fossil and nuclear generating stations and an extensive power grid across Ontario to meet the province's demands for electric energy. Interconnections with other systems place the Corporation in an extensive electrical grid that covers a large segment of the North American continent. Ontario Hydro is a financially self-sustaining corporation. The Province of Ontario guarantees bonds and notes issued to the public by the Corporation

  17. Taylor Hydro plant goes live

    International Nuclear Information System (INIS)

    Anon.

    2000-01-01

    The 12.75 MW Taylor Hydroelectric Plant in Magrath, Alberta, synchronized its generator with the Alberta Power Grid and began production in April 2000. The plant is located on Government of Alberta irrigation works and is owned by Canadian Hydro Developers. During the irrigation season the plant will generate approximately 40 million kilowatt hours of zero-emission 'green' power for consumption, enough to power 5,000 homes for a year. The Taylor plant is a joint venture with EPCOR Power Development Corporation, a wholly-owned subsidiary of EPCOR Inc., the City of Edmonton utility. Canadian Hydro Developers also owns a 19 MW wind plant and a 6 MW gas plant in Alberta and five other 'run of river' hydro plants in Ontario and British Columbia. The company is committed to the concept of low-impact power generation; its ownership of wind run-of-river hydro and gas-fired facilities is proof of that commitment

  18. Ontario Hydro annual report 1986

    Energy Technology Data Exchange (ETDEWEB)

    1987-04-01

    Ontario Hydro`s annual report of the financial position and activities for the year 1986 consists of their financial highlights; corporate profile; customer service and satisfaction; message from Chairman; message from President; 1986 in review; financial section; management report; five-year summary of financial statistics; and comparative statistics.

  19. The Community WRF-Hydro Modeling System Version 4 Updates: Merging Toward Capabilities of the National Water Model

    Science.gov (United States)

    McAllister, M.; Gochis, D.; Dugger, A. L.; Karsten, L. R.; McCreight, J. L.; Pan, L.; Rafieeinasab, A.; Read, L. K.; Sampson, K. M.; Yu, W.

    2017-12-01

    The community WRF-Hydro modeling system is publicly available and provides researchers and operational forecasters a flexible and extensible capability for performing multi-scale, multi-physics options for hydrologic modeling that can be run independent or fully-interactive with the WRF atmospheric model. The core WRF-Hydro physics model contains very high-resolution descriptions of terrestrial hydrologic process representations such as land-atmosphere exchanges of energy and moisture, snowpack evolution, infiltration, terrain routing, channel routing, basic reservoir representation and hydrologic data assimilation. Complementing the core physics components of WRF-Hydro are an ecosystem of pre- and post-processing tools that facilitate the preparation of terrain and meteorological input data, an open-source hydrologic model evaluation toolset (Rwrfhydro), hydrologic data assimilation capabilities with DART and advanced model visualization capabilities. The National Center for Atmospheric Research (NCAR), through collaborative support from the National Science Foundation and other funding partners, provides community support for the entire WRF-Hydro system through a variety of mechanisms. This presentation summarizes the enhanced user support capabilities that are being developed for the community WRF-Hydro modeling system. These products and services include a new website, open-source code repositories, documentation and user guides, test cases, online training materials, live, hands-on training sessions, an email list serve, and individual user support via email through a new help desk ticketing system. The WRF-Hydro modeling system and supporting tools which now include re-gridding scripts and model calibration have recently been updated to Version 4 and are merging toward capabilities of the National Water Model.

  20. Fixing hydro - The forgotten renewable

    International Nuclear Information System (INIS)

    Nalder, N.

    1992-01-01

    Since the dawn of civilization, man has captured the energy potential of falling water, from the water wheels in the fertile crescent of ancient times to today's highly sophisticated conventional and pumped storage projects. As we approach the 21st century, electric energy captured from falling water provides 2.0 trillion kilowatt-hours (21.23 quadrillion Btu), roughly 20% of the world's electric energy. Of the 2.56 billion kilowatts of the world's installed electric generating capacity, hydropower accounts for 24%. Between 1980 and 1989, world generation of hydroelectric power rose from 1.7 trillion kWh to 2.0 trillion kWh. As of January 1, 1988, the US has 90.5 million kW of installed hydro capacity - 70.8 million kW of it under license by the Federal Energy Regulatory Commission - with annual generation estimated at just under 300 billion kWh. Hydro's share, which not long ago comprised 13% of the nation's total capacity, now is just a 9% share. The US has the option to choose one or another path for hydro. If policy makers are willing to coast on a cushion of cheap natural gas, they will continue to shun hydro and put obstacles in its path. But if they come to regard hydro as an attractive resource - as they did only recently - economically and environmentally, they will encourage more balance in resource policies. Believing that interest in a balanced national resource portfolio will grow, the author reviews the past and suggests a possible future course of reasonable development for hydro. The article concludes with some suggested principles that will be needed if the appropriate balance is to be found

  1. Remote micro hydro

    Energy Technology Data Exchange (ETDEWEB)

    1985-03-01

    The micro-hydro project, built on a small tributary of Cowley Creek, near Whitehorse, Yukon, is an important step in the development of alternative energy sources and in conserving expensive diesel fuel. In addition to demonstrating the technical aspects of harnessing water power, the project paved the way for easier regulatory procedures. The power will be generated by a 9 meter head and a 6 inch crossflow turbine. The 36 V DC power will be stored in three 12 V batteries and converted to ac on demand by a 3,800 watt inverter. The system will produce 1.6 kW or 14,016 kWh per year with a firm flow of 1.26 cfs. This is sufficient to supply electricity for household needs and a wood working shop. The project is expected to cost about $18,000 and is more economical than tying into the present grid system, or continuing to use a gasoline generator. An environmental study determined that any impact of the project on the stream would be negligible. It is expected that no other water users will be affected by the project. This pilot project in micro-hydro applications will serve as a good indicator of the viability of this form of alternate energy in the Yukon. The calculations comparing the micro-hydro and grid system indicate that the mico-hydro system is a viable source of inflation-proof power. Higher heads and larger flow resulting in ac generation in excess of 10 kW would yield much better returns than this project. 3 tabs.

  2. Architecture at Hydro-Quebec. L'architecture a Hydro-Quebec

    Energy Technology Data Exchange (ETDEWEB)

    1991-01-01

    Architecture at Hydro-Quebec is concerned not only with combining function and aesthetics in designing buildings and other structures for an electrical utility, but also to satisfy technical and administrative needs and to help solve contemporary problems such as the rational use of energy. Examples are presented of Hydro-Quebec's architectural accomplishments in the design of hydroelectric power stations and their surrounding landscapes, thermal power stations, transmission substations, research and testing facilities, and administrative buildings. It is shown how some buildings are designed to adapt to local environments and to conserve energy. The utility's policy of conserving installations of historic value, such as certain pre-1930 power stations, is illustrated, and aspects of its general architectural policy are outlined. 20 figs.

  3. Ontario Hydro CANDU operating experience

    International Nuclear Information System (INIS)

    Bartholomew, R.W.; Woodhead, L.W.; Horton, E.P.; Nichols, M.J.; Daly, I.N.

    1987-01-01

    The CANDU Pressurized Heavy Water (CANDU-PHW) type of nuclear-electric generating station has been developed jointly by Atomic Energy of Canada Limited and Ontario Hydro. This report highlights Ontario Hydro's operating experience using the CANDU-PHW system, with a focus on worker and public safety, operating performance and costs, and reliability of system components

  4. Home and away with Norwegian hydro

    International Nuclear Information System (INIS)

    Jones, Simon

    2000-01-01

    Evidence of Norway's position as a world leader in terms of design and construction of hydroelectric power plant, and its position as the biggest producer of hydro in Europe, is presented. There is still some 30 TWh of hydro available for development in Norway. Statkraft is the country's biggest hydro generator: it owns and operates 54 hydro plants and has shares in a further 30. Statkraft's research has shown that there is still a large market for renewables in Europe and believes that householders are prepared to pay a premium for green energy. Statkraft trades energy with Denmark and Sweden and is believed to be planning further growth overseas. The new millennium is set to bring major changes in Norway's power industry: Hafslund and Elkem have already agreed to merge to create the country's biggest privately-owned power group

  5. Sinkhole investigated at B.C. Hydro`s Bennett Dam

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1996-07-01

    The cause of a sinkhole which appeared in a roadway crossing an earth filled dam in B. C., was discussed. The hole measured 6 ft. across and 20 ft. deep, and occurred in B.C. Hydro`s W.A.C. Bennett Dam which measures 600 ft. high, 2,600 ft. wide at the base and 35 ft. wide at the crest. The cause of the sinkhole is not known, but it is believed that a weakness in the dam may have found its way to the surface via a pipe connected to a bedrock settlement gauge buried within the dam. Sonar and ground penetrating radar were used to examine the area. The hole has been filled with gravel and monitoring continues. Experts do not anticipate immediate risk of dam failure. 1 fig.

  6. Low head hydro market assessment : main report : vol. 1

    International Nuclear Information System (INIS)

    2008-03-01

    Hydroelectric power is a predictable renewable energy source that produces no greenhouse gases (GHGs) and has low maintenance costs. In addition to river resources, low head hydro is available in sluice gates, irrigation canals, drinking water pressure release valves, and municipal wastewater outfalls. Canada's potential for low head hydro has been estimated at 5000 MW at 2000 different sites across the country. Sites of up to 50 MW have been identified in Ontario and Manitoba. This study performed a market assessment on low head hydro developments. Available and emerging technologies for developing low head hydro were identified. The economics of low head hydro in Canada were explored, and barriers to low head hydro development were identified. Strategies to promote low head hydro development were also explored, and the impact of different incentive types on the low head hydropower market were estimated using a simple economic model. It was concluded that a reduced, streamlined, and standardized environmental assessment process will significantly benefit low head hydro development in Canada. 5 refs., 14 tabs., 17 figs

  7. Romanian achievement in hydro-power plants

    International Nuclear Information System (INIS)

    Cardu, M.; Bara, T.

    1998-01-01

    This paper briefly deals with the achievements relating to Hydro-electric Power Plants within the process of development of the National Power System in Romania. Also presented is the Romanian industry contribution to hydro-electrical power plant equipment manufacturing. (author)

  8. Ekstraksi Minyak Atsiri Dari Akar Wangi Menggunakan Metode Steam - Hydro distillation dan Hydro distilation dengan Pemanas Microwave

    Directory of Open Access Journals (Sweden)

    Maulana M Al Hanief

    2013-09-01

    Full Text Available Penelitian ini bertujuan untuk memperoleh minyak atsiri dari akar wangi dengan modifikasi metode steam-hydro distillation dan hydro distillation yaitu menggunakan pemanasan microwave kemudian membandingkan hasilnya dengan penelitian sebelumnya. Modifikasi ini diharapkan lebih efisien dalam masalah lama penyulingan dan kualitas serta kuantitas rendemen minyak yang lebih baik dan banyak. Penelitian ini menggunakan dua metode yaitu steam-hydro distillation dan hydro distillation dengan pemanfaatan gelombang mikro. Bahan baku yang digunakan dalam penelitian adalah akar wangi jenis pulus wangi yang tumbuh di Kabupaten Garut, Jawa Barat. Variabel yang digunakan adalah bahan baku yang dicacah dan bahan baku utuh dengan variasi massa bahan 50 gr, 60, gr, 70 gr, 80 gr, dan 90 gr dengan pelarut air sebanyak 450 ml dalam labau distiller berukuran 1000 ml. Lama penyulingan adalah lima jam dengan pengamatan tiap 30 menit serta daya yang digunakan adalah 400 Watt. Analisa terhadap hasil minyak atsiri yang diperoleh antara lain analisa GC-MS, spesific gravity, indeks bias, dan bilangan asam. Hasil dari penelitian ini dibandingkan dengan hasil penelitian terdahulu yang tidak memanfaatkan gelombang mikro. Dari hasil penelitian diperoleh % rendemen kumulatif, sifat fisik, sifat kimia, dan kandungan komponen minyak dari metode steam-hydro distillation lebih baik dibandingkan metode hydro distillation ditandai dengan kuantitas dan kualitas yang sesuai dengan SNI.  Sementara itu jika dibandingkan dengan metode terdahulu dapat disimpulkan bahwa penggunaan gelombang mikro lebih efisien dalam waktu dan kuantitas serta kualitas minyak yang lebih baik dibandingkan tanpa penggunaan gelombang mikro

  9. Hydro-Quebec looks south

    International Nuclear Information System (INIS)

    Ross, P.

    1997-01-01

    The recent introduction of Hydro-Quebec, the Canadian utility, into selling cheap electric power in the United States (US) deregulated power market is described, following applications to the US Federal Energy Regulatory Commission. As its prices are so much cheaper than its US competitors, it is expected that the company will soon have many willing customers across the USA. Hydro-Quebec will remain a publicly owned utility, but has experienced restructuring in order to meet this new competitive challenge. (UK)

  10. Hydro-Quebec is profitable

    International Nuclear Information System (INIS)

    Poirier, M.

    1997-01-01

    The pros and cons of the potential privatisation of Hydro-Quebec were discussed. A brief review of charges of less than competent management, low profitability and the corporation's recent administrative restructuring was presented. The general thrust of the argument was that Hydro-Quebec plays a crucial role in the economic development of Quebec, it can be made to be more profitable and that for the good of Quebec it should continue as a public corporation under the control of the provincial government

  11. Ontario Hydro CANDU operating experience

    International Nuclear Information System (INIS)

    Jackson, H.A.; Woodhead, L.W.; Fanjoy, G.R.

    1984-03-01

    The CANDU Pressurized Heavy Water (CANDU-PHW) type of nuclear-electric generating station has been developed jointly by Atomic Energy of Canada Limited and Ontario Hydro. This report highlights Ontario Hydro's operating experience using the CANDU-PHW system, with a focus on the operating performance and costs, reliability of system components and nuclear safety considerations for the workers and the public

  12. Small steps for hydro

    International Nuclear Information System (INIS)

    Wicke, Peter

    1998-01-01

    The government in Peru has decided to utilise its gas reserves and restrict hydro to relatively small schemes. A number of reasons for the decision are given. In 1997, the Shell-Mobile-Bechtel-COSAPI consortium was formed and agreements were signed regarding exploiting Gas de Camisea. The country's energy needs to 2010 are being assessed. It is likely that by 2001 the whole of south Peru will be receiving gas from Camisea. The Peru situation is discussed under the headings of (i) existing capacity, (ii) growing demands, (iii) a history of hydro in Peru, (iv) electrification and SHP and (v) outlook. The future for Peru's electric energy development is bright. While most of its new power capacity will come from natural gas, the small hydros also have a part to play. A stronger commitment of national and regional political authorities to consider supplies outside the big cities is said to be needed. (UK)

  13. Hydro power flexibility for power systems with variable renewable energy sources: an IEA Task 25 collaboration: Hydro power flexibility for power systems

    Energy Technology Data Exchange (ETDEWEB)

    Huertas-Hernando, Daniel [Department of Energy Systems, SINTEF, Trondheim Norway; Farahmand, Hossein [Department of Electric Power Engineering, Norwegian University of Science and Technology (NTNU), Trondheim Norway; Holttinen, Hannele [Department of Energy Systems, VTT Technical Research Centre of Finland, Espoo Finland; Kiviluoma, Juha [Department of Energy Systems, VTT Technical Research Centre of Finland, Espoo Finland; Rinne, Erkka [Department of Energy Systems, VTT Technical Research Centre of Finland, Espoo Finland; Söder, Lennart [Department of Electrical Engineering, KTH University, Stockholm Sweden; Milligan, Michael [Transmission and Grid Integration Group, National Renewable Energy Laboratory' s National Wind Technology Center, Golden CO USA; Ibanez, Eduardo [Transmission and Grid Integration Group, National Renewable Energy Laboratory' s National Wind Technology Center, Golden CO USA; Martínez, Sergio Martín [Department of Electrical Engineering, Electronics, Automation and Communications, Universidad de Castilla-La Mancha, Albacete Spain; Gomez-Lazaro, Emilio [Department of Electrical Engineering, Electronics, Automation and Communications, Universidad de Castilla-La Mancha, Albacete Spain; Estanqueiro, Ana [National Laboratory of Energy and Geology - LNEG, Lisbon Portugal; Rodrigues, Luis [National Laboratory of Energy and Geology - LNEG, Lisbon Portugal; Carr, Luis [Research Association for Energy Economics (FfE GmbH), Munich Germany; van Roon, Serafin [Research Association for Energy Economics (FfE GmbH), Munich Germany; Orths, Antje Gesa [Energinet.dk, Fredericia Denmark; Eriksen, Peter Børre [Energinet.dk, Fredericia Denmark; Forcione, Alain [Hydro Quebec, Montréal Canada; Menemenlis, Nickie [Hydro Quebec, Montréal Canada

    2016-06-20

    Hydro power is one of the most flexible sources of electricity production. Power systems with considerable amounts of flexible hydro power potentially offer easier integration of variable generation, e.g., wind and solar. However, there exist operational constraints to ensure mid-/long-term security of supply while keeping river flows and reservoirs levels within permitted limits. In order to properly assess the effective available hydro power flexibility and its value for storage, a detailed assessment of hydro power is essential. Due to the inherent uncertainty of the weather-dependent hydrological cycle, regulation constraints on the hydro system, and uncertainty of internal load as well as variable generation (wind and solar), this assessment is complex. Hence, it requires proper modeling of all the underlying interactions between hydro power and the power system, with a large share of other variable renewables. A summary of existing experience of wind integration in hydro-dominated power systems clearly points to strict simulation methodologies. Recommendations include requirements for techno-economic models to correctly assess strategies for hydro power and pumped storage dispatch. These models are based not only on seasonal water inflow variations but also on variable generation, and all these are in time horizons from very short term up to multiple years, depending on the studied system. Another important recommendation is to include a geographically detailed description of hydro power systems, rivers' flows, and reservoirs as well as grid topology and congestion.

  14. Hydro or the waltz of managers

    International Nuclear Information System (INIS)

    Anon.

    1997-01-01

    A critique of current management and personnel problems at Hydro-Quebec was presented. With 20,000 employees and some of the world's greatest hydroelectric projects to its credit, Hydro-Quebec has historically been a source of great pride for its employees and Quebec's society. However, recent problems related to management, bureaucratization and communications within the corporation have led to important moral problems within the workforce. Management of the corporation under the newly appointed president, Andre Caille, the issue of profitability and competitiveness, the worsening morale among employees and the relationship between Hydro-Quebec and the provincial government were the principal topics discussed

  15. Innovative private micro-hydro power development in Rwanda

    International Nuclear Information System (INIS)

    Pigaht, Maurice; Plas, Robert J. van der

    2009-01-01

    Under the 'Private Sector Participation in Micro-Hydro Development Project in Rwanda', four newly registered Rwandan companies are each constructing a micro-hydro electricity plant (100-500 kW) and building a low-voltage distribution grid. These companies financed their plants through their own equity and debt with support from the PSP Hydro project. This support comprised a subsidy of 30-50% of investment costs, technical and business development assistance, project monitoring and financial controlling. The experiences gained so far have important implications for similar future micro-hydro energy sector development projects and this paper puts forward three key messages: (i) institutional arrangements rather than technical quality determine the success of such projects; (ii) truly sustainable rural electrification through micro-hydro development demands a high level of local participation at all levels and throughout all project phases, not just after plant commissioning; and (iii) real impact and sustainability can be obtained through close collaboration of local private and financial sector firms requiring only limited external funds. In short, micro-hydro projects can and will be taken up by local investors as a business if the conditions are right. Applying these messages could result in an accelerated uptake of viable micro-hydro activities in Rwanda, and in the opinion of the authors elsewhere too.

  16. Hydro-Quebec 2005 annual report : people with energy

    International Nuclear Information System (INIS)

    2006-01-01

    Hydro-Quebec generates, transmits and distributes electricity mainly produced by renewable energy sources. Its sole shareholder is the Quebec government. This annual report reviewed the operations of Hydro-Quebec, and provided data on energy sales, production and details of the utility's environmental programs. Information on Hydro-Quebec subsidiaries in 2005 was presented in the following separate sections: Hydro-Quebec Production; Hydro-Quebec TransEnergie; Hydro-Quebec Distribution; Hydro-Quebec Equipement; and the Societe d'energie de la Baie James. In 2005, Hydro-Quebec Distribution signed contracts for an initial block of 990 MW of wind power and issued a tender call for an additional 2000 MW of wind power. A generator balancing service was created and authorized by the Regie de l'energie. Hydro-Quebec customers have achieved energy savings of nearly 450 GWh in 2005. The commissioning of Toulnustouc generating station was achieved 5 months ahead of schedule. The 526 MW facility will generate 2.7 TWh annually. Work at the Chute-Allard and Rapide-des-Coeurs sites has continued, as well as construction at Mercier and Peribonka and Eastmain-1. Income from continuing operations came to $2.25 billion, a $124 million increase that was attributed to a rise in domestic sales and net short-term exports. The income was offset by higher pension expenses, depreciation and amortization, as well as by cost of supply on external markets and financial expenses. All other operating expenses were lower than in 2004. Capital spending for the transmission system reached its highest level since 1997, with $793 million invested, including $336 million to meet growth. Data on the company's financial performance, executive changes and reorganization were provided. Financial statements included a review and analysis of financial transactions, an auditor's report, as well as customary notes to the consolidated financial statement including balance sheets, assets, liabilities and

  17. Hydro-Quebec's environmental policy

    International Nuclear Information System (INIS)

    1996-10-01

    Hydro-Quebec established a new environmental policy on August 1, 1996. A summary of the policy was presented. According to this policy statement the utility undertakes to recognize the environmental implications of its activities and assumes responsibilities for these implications by integrating them into its corporate decision-making processes. The following general principles and means of implementation have been highlighted: (1) sustainable development, (2) strict, responsible environmental management, (3) environmental research, (4) enhancement of activities and facilities, (5) information, consultation and dialogue, and (6) environmental responsibility of Hydro-Quebec personnel, subsidiaries and business partners

  18. Climate impact on BC Hydro's water resources

    International Nuclear Information System (INIS)

    Smith, D.; Rodenhuis, D.

    2008-01-01

    BC Hydro like many other hydro utilities has used the historical record of weather and runoff as the standard description the variability and uncertainty of the key weather drivers for its operation and planning studies. It has been conveniently assumed that this historical record is or has been statistically stationary and therefore is assumed to represent the future characteristics of climatic drivers on our system. This assumption is obviously no longer justifiable. To address the characterisation of future weather, BC Hydro has a multi-year a directed research program with the Pacific Climate Impacts Consortium to evaluate the impacts of climate change on the water resources that BC Hydro manages for hydropower generation and other uses. The objective of this program is to derive climate change adjusted meteorologic and hydrologic sequences suitable for use in system operations and planning studies. These climate-adjusted sequences then can be used to test system sensitivity to climate change scenarios relative to the baseline of the historical record. This paper describes BC Hydro's research program and the results achieved so far. (author)

  19. An Overview of Power Topologies for Micro-hydro Turbines

    DEFF Research Database (Denmark)

    Nababan, Sabar; Muljadi, E.; Blaabjerg, Frede

    2012-01-01

    This paper is an overview of different power topologies of micro-hydro turbines. The size of micro-hydro turbine is typically under 100kW. Conventional topologies of micro-hydro power are stand-alone operation used in rural electrical network in developing countries. Recently, many of micro-hydro...... power generations are connected to the distribution network through power electronics (PE). This turbines are operated in variable frequency operation to improve efficiency of micro-hydro power generation, improve the power quality, and ride through capability of the generation. In this paper our...... discussion is limited to the distributed generation. Like many other renewable energy sources, the objectives of micro-hydro power generation are to reduce the use of fossil fuel, to improve the reliability of the distribution system (grid), and to reduce the transmission losses. The overview described...

  20. [Ontario Hydro International Inc.]. Annual report 1993

    International Nuclear Information System (INIS)

    1994-01-01

    Ontario Hydro International Inc. is the international representative of Ontario Hydro. OHII operates as a global utility that markets Ontario Hydro's services and products. Its mission is to be the leader in energy efficiency and sustainable development in the international marketplace. This report describes the year's activities in the following areas: Energy management and environment, hydroelectric generation, nuclear products and services, fossil generation, grid (transmission) business, utility management, Asia Power Group Inc. The document also includes financial highlights and international and customer contracts

  1. Innovative private micro-hydro power development in Rwanda

    Energy Technology Data Exchange (ETDEWEB)

    Pigaht, Maurice; Van der Plas, Robert J. [MARGE-Netherlands, Brem 68, 7577 EW Oldenzaal (Netherlands)

    2009-11-15

    Under the 'Private Sector Participation in Micro-Hydro Development Project in Rwanda', four newly registered Rwandan companies are each constructing a micro-hydro electricity plant (100-500 kW) and building a low-voltage distribution grid. These companies financed their plants through their own equity and debt with support from the PSP Hydro project. This support comprised a subsidy of 30-50% of investment costs, technical and business development assistance, project monitoring and financial controlling. The experiences gained so far have important implications for similar future micro-hydro energy sector development projects and this paper puts forward three key messages: (1) institutional arrangements rather than technical quality determine the success of such projects; (2) truly sustainable rural electrification through micro-hydro development demands a high level of local participation at all levels and throughout all project phases, not just after plant commissioning; and (3) real impact and sustainability can be obtained through close collaboration of local private and financial sector firms requiring only limited external funds. In short, micro-hydro projects can and will be taken up by local investors as a business if the conditions are right. Applying these messages could result in an accelerated uptake of viable micro-hydro activities in Rwanda, and in the opinion of the authors elsewhere too. (author)

  2. Himalayan hydro on the horizon

    International Nuclear Information System (INIS)

    Sharp, Timothy

    2000-01-01

    The prospects for development of hydro in the Himalayas has been enhanced by privatisation and the urgent need for clean electricity in the north of India. There are various hurdles to be overcome before the projects are likely to move forward in earnest before 2005, and these are mentioned. The demand for electricity in India is said to be enormous. At present, there is much polluting industry along the Himalayas. As throughout the Indian privatisation dilemma, the critical issues for development of Himalayan hydro come down to credible commercial power markets and finance. With regard to finance and administrative changes, the Indian government is carrying out a number of actions and these are itemised. The US is vigorously promoting the development of Himalayan hydro as a key to much needed regional co-operation and the World Bank is supportive

  3. AUTOSORO: A fuel management study program for Ontario Hydro CANDU reactors

    International Nuclear Information System (INIS)

    Wilk, L.

    1988-01-01

    A computer program, AUTOSORO, has been developed to automatically simulate an Ontario Hydro CANDU reactor core for any time duration according to user-defined on-power refuelling criteria. It is a three-dimensional two-group diffusion code coupled to refuelling decision logic at three screening levels: burnup, coupled neighbor, full-core. A central feature is a projected local-iteration scheme for predicting fuelling-induced local neutron flux changes. Comparisons of AUTOSORO results with actual histories demonstrate that it will be an excellent productivity tool for future in-core fuel management studies, reducing several man-months of effort to several man-hours

  4. Ontario Hydro decontamination experience

    Energy Technology Data Exchange (ETDEWEB)

    Lacy, C S; Patterson, R W; Upton, M S [Chemistry and Metallurgy Department, Central Production Services, Ontario Hydro, ON (Canada)

    1991-04-01

    Ontario Hydro currently operates 18 nuclear electric generating units of the CANDU design with a net capacity of 12,402 MW(e). An additional 1,762 MW(e) is under construction. The operation of these facilities has underlined the need to have decontamination capability both to reduce radiation fields, as well as to control and reduce contamination during component maintenance. This paper presents Ontario Hydro decontamination experience in two key areas - full heat transport decontamination to reduce system radiation fields, and component decontamination to reduce loose contamination particularly as practised in maintenance and decontamination centres. (author)

  5. Ontario Hydro decontamination experience

    International Nuclear Information System (INIS)

    Lacy, C.S.; Patterson, R.W.; Upton, M.S.

    1991-01-01

    Ontario Hydro currently operates 18 nuclear electric generating units of the CANDU design with a net capacity of 12,402 MW(e). An additional 1,762 MW(e) is under construction. The operation of these facilities has underlined the need to have decontamination capability both to reduce radiation fields, as well as to control and reduce contamination during component maintenance. This paper presents Ontario Hydro decontamination experience in two key areas - full heat transport decontamination to reduce system radiation fields, and component decontamination to reduce loose contamination particularly as practised in maintenance and decontamination centres. (author)

  6. The little hydro-electricity: the boosting?

    International Nuclear Information System (INIS)

    Brunier, S.; Najac, C.; Roussel, A.M.; Claustre, R; Baril, D.; Marty, D.; Lefevre, P.; Arnould, M.

    2007-01-01

    The hydraulic energy could be easily developed in France to reach the objectives of the european directive on the renewable energies. This development can be assured by the construction of power plants perfectly integrated in their environment and respecting the rivers and assured also by the increase of the capacities of existing power plants as it is allowing by the new regulations. This document presents the place and the capacity of the hydro-electricity in France, the implementing of a green electricity, the existing regulation, the river biological continuation, the ecosystems and the little hydro-electricity and the example of the hydro-electric power plant of Scey-sur-Saone. (A.L.B.)

  7. Collision data involving hydro-carbon molecules

    International Nuclear Information System (INIS)

    Tawara, H.; Itikawa, Y.; Nishimura, H.; Tanaka, H.; Nakamura, Y.

    1990-07-01

    Hydro-carbon molecules are abundantly produced when graphites are used as internal wall materials of hydrogen plasmas and strongly influence properties of low temperature plasmas near the edges as well as those of high temperature plasmas at the center. In this report, following simple description of the production mechanisms of hydro-carbon molecules under the interactions between graphite and hydrogen plasma, the present status of collision data for hydro-carbon molecules by electron impact is discussed and the relevant data are summarized in a series of figures and tables. It should also be noted that, in addition to fusion plasmas, these hydrocarbon data compiled here are quite useful in other applications such as plasma chemistry and material processing. (author)

  8. The Manitoba Hydro-Electric Board 50. annual report

    International Nuclear Information System (INIS)

    2001-01-01

    This document presents the financial statements for The Manitoba Hydro-Electric Board (Manitoba Hydro) for the fiscal year ended March 31, 2001. Manitoba Hydro was proud to report no electricity rate increase for the period 2000-2001, a feat realized for the fifth consecutive year for most customer groups. Financial and production highlights were first presented, followed by the vision mission and goals of Manitoba Hydro. Manitoba Hydro serves 403 000 customers in the province with electric energy, and 248 000 customers with natural gas service mainly in the south of the province. Electricity export sale agreements are in place with more than 35 utilities and marketers in the United States, Ontario and Saskatchewan. Self-renewing waterpower is used to generate the bulk of the electricity. The transmission and distribution lines stretch over 100 000 kilometres. Manitoba Hydro is the fourth largest energy utility in Canada based on capital assets. A review of the year was presented, as well as a brief historical overview of Manitoba Hydro. The financial review section discussed the management report, the Auditor's report. Included in this section were various statement sheets, namely the consolidated statement of income and retained earnings, consolidated balance sheet, consolidated statement of cash flows, followed by some notes to the consolidated financial statements. Consolidated financial statistics and operating statistics - 10-year overview were presented. A brief presentation of the Board members and senior officers ended this report. tabs. figs

  9. The Manitoba Hydro-Electric Board 50. annual report

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-07-01

    This document presents the financial statements for The Manitoba Hydro-Electric Board (Manitoba Hydro) for the fiscal year ended March 31, 2001. Manitoba Hydro was proud to report no electricity rate increase for the period 2000-2001, a feat realized for the fifth consecutive year for most customer groups. Financial and production highlights were first presented, followed by the vision mission and goals of Manitoba Hydro. Manitoba Hydro serves 403 000 customers in the province with electric energy, and 248 000 customers with natural gas service mainly in the south of the province. Electricity export sale agreements are in place with more than 35 utilities and marketers in the United States, Ontario and Saskatchewan. Self-renewing waterpower is used to generate the bulk of the electricity. The transmission and distribution lines stretch over 100 000 kilometres. Manitoba Hydro is the fourth largest energy utility in Canada based on capital assets. A review of the year was presented, as well as a brief historical overview of Manitoba Hydro. The financial review section discussed the management report, the Auditor's report. Included in this section were various statement sheets, namely the consolidated statement of income and retained earnings, consolidated balance sheet, consolidated statement of cash flows, followed by some notes to the consolidated financial statements. Consolidated financial statistics and operating statistics - 10-year overview were presented. A brief presentation of the Board members and senior officers ended this report. tabs. figs.

  10. Development of Hydro-Mechanical Deep Drawing

    DEFF Research Database (Denmark)

    Zhang, Shi-Hong; Danckert, Joachim

    1998-01-01

    The hydro-mechanical deep-drawing process is reviewed in this article. The process principles and features are introduced and the developments of the hydro-mechanical deep-drawing process in process performances, in theory and in numerical simulation are described. The applications are summarized....... Some other related hydraulic forming processes are also dealt with as a comparison....

  11. BC Hydro shops for GHG offsets

    International Nuclear Information System (INIS)

    Anon.

    2000-01-01

    BC Hydro is reported to have offered to purchase one million tonnes of carbon dioxide reductions in Canada's Greenhouse Gas Emissions Reduction Trading program (GERT). The program uses a baseline and credit system, where emitters purchase measurable quantities of site-specific GHG reductions. Since mid-1998, the program registered five bilateral trades and seven offers to sell. BC Hydro's recent offer is the first offer to buy. BC Hydro has made the offer to buy in expectation of the introduction of the start of the Kyoto Protocol reductions, and expects to be in the game for some time to come if it is to meet its obligations under the Kyoto Protocol. Preference will be given to projects located in Canada, but BC Hydro will consider reductions created anywhere in the world. The financial range of a single trade is between $50,000 and $1 million. (GHG offsets are currently trading in North America for between $.50 and $3.00 Cdn per metric tonne of carbon dioxide equivalent.) At present, offsets are selling at a heavily discounted price because of the uncertainty that investments made now will be credited against future regulations curbing emitters. Consequently, buying now while prices are low, may lead to sizable benefits later, depending on the actual regulations when they are promulgated. Trading now will also give BC Hydro greater credibility and assurance to have its voice heard when discussions about emissions trading and the implementation of emission trading rules reaches the serious stage

  12. Times are changing, Hydro-Quebec multiplies its assets

    International Nuclear Information System (INIS)

    Lefevre, M.

    1997-01-01

    Hydro-Quebec''s advance into the North American and world multi-energy market began with the purchase of an interest in the natural gas holding company Noverco, a commercial partnership with Gaz de France, and marketing agreements with Enron and Trigen in the United States. Hydro-Quebec, the world''s sixth largest electric utility, aims to become a multi-energy enterprise selling not only electricity, but also natural gas, oil and certain renewable forms of energy. Currently, Hydro-Quebec is licensed to make border sales of electricity at regulated prices. Through the US Federal Energy Regulatory Commission (FERC), Hydro-Quebec will be able also to sell electricity through wholesale spot contracts with electricity marketers such as Trigen and Enron

  13. A hydro-optical model for deriving water quality variables from satellite images (HydroSat): A case study of the Nile River demonstrating the future Sentinel-2 capabilities

    NARCIS (Netherlands)

    Salama, M.; Radwan, M.; van der Velde, R.

    2012-01-01

    This paper describes a hydro-optical model for deriving water quality variables from satellite images, hereafter HydroSat. HydroSat corrects images for atmospheric interferences and simultaneously retrieves water quality variables. An application of HydroSat to Landsat Enhanced Thematic Mapper (ETM)

  14. Ontario hydro radioactive material transportation field guide

    International Nuclear Information System (INIS)

    Howe, W.

    1987-01-01

    The recent introduction of both the AECB Transport Packaging of Radioactive Material Regulations and Transport Canada's Transportation of Dangerous Goods Regulations have significantly altered the requirements for transporting radioactive material in Canada. Extensive additional training as well as certification of several hundred Ontario Hydro employees has been necessary to ensure compliance with the additional and revised regulatory requirements. To assist in the training of personnel, an 'active' corporate Ontario Hydro Field Guide for Radioactive Material Transport document has been developed and published. The contents of this Field Guide identify current Ontario Hydro equipment and procedures as well as the updated relevant regulatory requirements within Canada. In addition, to satisfying Ontario Hydro requirements for this type of information over two thousand of these Field Guides have been provided to key emergency response personnel throughout the province of Ontario to assist in their transportation accident response training

  15. Mechatronics in compressor valves - experience with HydroCOM; Mechatronik in Kompressorventilen - Betriebserfahrungen mit HydroCOM

    Energy Technology Data Exchange (ETDEWEB)

    Rumpold, A. [Hoerbiger Ventilwerke GmbH, Wien (Austria)

    2000-03-01

    Optimisation of fluid flow rates is indispensable in piston compressor operation. Messrs. Hoerbiger are producers of continuous control elements which combine mechanical and electronic components. Applications and examples of the HydroCOM control system are presented. High availability permits servicing intervals around 160,000 hours of operation. The longer operating time will improve the competitive standing of piston compressors as compared to turbocompressors and screw compressors. [German] Fuer den Betrieb von Kolbenkompressoren ist eine optimale Liefermengenregelung unverzichtbarer Bestandteil. Im Gegensatz zu herkoemmlichen Verfahren hat Hoerbiger vor zwei Jahren durch die Kombination von Mechanik und Elektronik eine neue Generation von stufenlosen Mengenregelungen auf den Markt gebracht. Anwendungsbeispiele und Betriebserfahrungen mit der HydroCOM Regelung werden vorgestellt. Hohe Verfuegbarkeit erlaubt Wartungsintervalle fuer HydroCOM Aktuatoren von ca. 16000 Betriebsstunden. Und aufgrund der generell verbesserten Standzeiten von Packungen, Kolbenringen und Ventilen erzielt der so geregelte Kolbenkompressor hohe Attraktivitaet gegenueber Turbo- und Schraubenverdichtern. (orig./AKF)

  16. Analysis of a pico tubular-type hydro turbine performance by runner blade shape using CFD

    Science.gov (United States)

    Park, J. H.; Lee, N. J.; Wata, J. V.; Hwang, Y. C.; Kim, Y. T.; Lee, Y. H.

    2012-11-01

    There has been a considerable interest recently in the topic of renewable energy. This is primarily due to concerns about environmental impacts of fossil fuels. Moreover, fluctuating and rising oil prices, increase in demand, supply uncertainties and other factors have led to increased calls for alternative energy sources. Small hydropower, among other renewable energy sources, has been evaluated to have adequate development value because it is a clean, renewable and abundant energy resource. In addition, small hydropower has the advantage of low cost development by using rivers, agricultural reservoirs, sewage treatment plants, waterworks and water resources. The main concept of the tubular-type hydro turbine is based on the difference in water pressure levels in pipe lines, where the energy which was initially wasted by using a reducing valve at the pipeline of waterworks, is collected by turbine in the hydro power generator. In this study, in order to acquire the performance data of a pico tubular-type hydro turbine, the output power, head and efficiency characteristics by different runner blade shapes are examined. The pressure and velocity distributions with the variation of guide vane and runner vane angle on turbine performance are investigated by using a commercial CFD code.

  17. HydroSHEDS: A global comprehensive hydrographic dataset

    Science.gov (United States)

    Wickel, B. A.; Lehner, B.; Sindorf, N.

    2007-12-01

    The Hydrological data and maps based on SHuttle Elevation Derivatives at multiple Scales (HydroSHEDS) is an innovative product that, for the first time, provides hydrographic information in a consistent and comprehensive format for regional and global-scale applications. HydroSHEDS offers a suite of geo-referenced data sets, including stream networks, watershed boundaries, drainage directions, and ancillary data layers such as flow accumulations, distances, and river topology information. The goal of developing HydroSHEDS was to generate key data layers to support regional and global watershed analyses, hydrological modeling, and freshwater conservation planning at a quality, resolution and extent that had previously been unachievable. Available resolutions range from 3 arc-second (approx. 90 meters at the equator) to 5 minute (approx. 10 km at the equator) with seamless near-global extent. HydroSHEDS is derived from elevation data of the Shuttle Radar Topography Mission (SRTM) at 3 arc-second resolution. The original SRTM data have been hydrologically conditioned using a sequence of automated procedures. Existing methods of data improvement and newly developed algorithms have been applied, including void filling, filtering, stream burning, and upscaling techniques. Manual corrections were made where necessary. Preliminary quality assessments indicate that the accuracy of HydroSHEDS significantly exceeds that of existing global watershed and river maps. HydroSHEDS was developed by the Conservation Science Program of the World Wildlife Fund (WWF) in partnership with the U.S. Geological Survey (USGS), the International Centre for Tropical Agriculture (CIAT), The Nature Conservancy (TNC), and the Center for Environmental Systems Research (CESR) of the University of Kassel, Germany.

  18. Experience of pico/micro hydro based power generation

    Energy Technology Data Exchange (ETDEWEB)

    Murthy, S.S. [Indian Inst. of Technology, Delhi, New Delhi (India). Dept. of Electrical Engineering

    2010-07-01

    Although India has approximately 150,000 megawatts of hydro potential, only a small portion is tapped. There is also significant untapped hydro potential in many developing countries such as Nepal, Bhutan, Vietnam, Indonesia and regions in South America and Africa. Small-scale hydroelectric power systems with capacities of up to a few megawatts are eco-friendly and sustainable. They can be classified based on unit sizes as pico (u pto 10 kilowatts), micro (10-100 kilowatts) and mini (100 kilowatts to a few megawatts) hydro systems. Mini hydro systems are always grid connected while micro can be either grid connected or off grid. Pico is always off grid. In India, there are thousands of favorable sites in this range that should be tapped for distributed power generation to electrify local communities. This need is reflected by the global emphasis on distributed power generation as well as the Government of India's policy to promote this type of power generation. A working stand alone pico-hydro power generating system has been successfully installed in 5 sites in Karnataka. The purpose of the project was to demonstrate the technical, managerial and economic feasibility of setting up small hydro projects in remote hilly areas of Karnataka, India and its positive environmental impact. The presentation discussed the site selection criteria; installed sites of pico hydro; system description; parts of the system; the electric load controller; types of electronic load controllers; and a description of the unit and control scheme. tabs., figs.

  19. Brigham City Hydro Generation Project

    Energy Technology Data Exchange (ETDEWEB)

    Ammons, Tom B. [Energy Conservation Specialist, Port Ewen, NY (United States)

    2015-10-31

    Brigham City owns and operates its own municipal power system which currently includes several hydroelectric facilities. This project was to update the efficiency and capacity of current hydro production due to increased water flow demands that could pass through existing generation facilities. During 2006-2012, this project completed efficiency evaluation as it related to its main objective by completing a feasibility study, undergoing necessary City Council approvals and required federal environmental reviews. As a result of Phase 1 of the project, a feasibility study was conducted to determine feasibility of hydro and solar portions of the original proposal. The results indicated that the existing Hydro plant which was constructed in the 1960’s was running at approximately 77% efficiency or less. Brigham City proposes that the efficiency calculations be refined to determine the economic feasibility of improving or replacing the existing equipment with new high efficiency equipment design specifically for the site. Brigham City completed the Feasibility Assessment of this project, and determined that the Upper Hydro that supplies the main culinary water to the city was feasible to continue with. Brigham City Council provided their approval of feasibility assessment’s results. The Upper Hydro Project include removal of the existing powerhouse equipment and controls and demolition of a section of concrete encased penstock, replacement of penstock just upstream of the turbine inlet, turbine bypass, turbine shut-off and bypass valves, turbine and generator package, control equipment, assembly, start-up, commissioning, Supervisory Control And Data Acquisition (SCADA), and the replacement of a section of conductors to the step-up transformer. Brigham City increased the existing 575 KW turbine and generator with an 825 KW turbine and generator. Following the results of the feasibility assessment Brigham City pursued required environmental reviews with the DOE and

  20. Development of a tritium dispersion code

    International Nuclear Information System (INIS)

    Bell, R.P.; Davis, M.W.; Joseph, S.; Wong, K.Y.

    1985-01-01

    This paper describes the development and verification of a computer code designed to calculate the radiation dose to man following acute or chronic atmospheric releases of tritium gas and oxide from a point source. The Ontario Hydro Tritium Dispersion Code calculates tritium concentrations in air, soil, and vegetation and doses to man resulting from inhalation/immersion and ingestion of food, milk meat and water. The deposition of HT to soil, conversion of HT to HTO by soil enzymes and resuspension of HTO to air have been incorporated into the terrestrial compartment model and are unique features of the code. Sensitivity analysis has identified the HT deposition velocity and the equivalent water depth of the vegetation compartment as two parameters which have a strong influence on dose calculations. Tritium concentrations in vegetation and soil calculated by the code were in reasonable agreement with experimental results. The radiological significance of including the mechanisms of HT to HTO conversion and resuspension of HTO to air is illustrated

  1. Simulation codes and the impact of validation/uncertainty requirements

    International Nuclear Information System (INIS)

    Sills, H.E.

    1995-01-01

    Several of the OECD/CSNI members have adapted a proposed methodology for code validation and uncertainty assessment. Although the validation process adapted by members has a high degree of commonality, the uncertainty assessment processes selected are more variable, ranaing from subjective to formal. This paper describes the validation and uncertainty assessment process, the sources of uncertainty, methods of reducing uncertainty, and methods of assessing uncertainty.Examples are presented from the Ontario Hydro application of the validation methodology and uncertainty assessment to the system thermal hydraulics discipline and the TUF (1) system thermal hydraulics code. (author)

  2. The Aster code

    International Nuclear Information System (INIS)

    Delbecq, J.M.

    1999-01-01

    The Aster code is a 2D or 3D finite-element calculation code for structures developed by the R and D direction of Electricite de France (EdF). This dossier presents a complete overview of the characteristics and uses of the Aster code: introduction of version 4; the context of Aster (organisation of the code development, versions, systems and interfaces, development tools, quality assurance, independent validation); static mechanics (linear thermo-elasticity, Euler buckling, cables, Zarka-Casier method); non-linear mechanics (materials behaviour, big deformations, specific loads, unloading and loss of load proportionality indicators, global algorithm, contact and friction); rupture mechanics (G energy restitution level, restitution level in thermo-elasto-plasticity, 3D local energy restitution level, KI and KII stress intensity factors, calculation of limit loads for structures), specific treatments (fatigue, rupture, wear, error estimation); meshes and models (mesh generation, modeling, loads and boundary conditions, links between different modeling processes, resolution of linear systems, display of results etc..); vibration mechanics (modal and harmonic analysis, dynamics with shocks, direct transient dynamics, seismic analysis and aleatory dynamics, non-linear dynamics, dynamical sub-structuring); fluid-structure interactions (internal acoustics, mass, rigidity and damping); linear and non-linear thermal analysis; steels and metal industry (structure transformations); coupled problems (internal chaining, internal thermo-hydro-mechanical coupling, chaining with other codes); products and services. (J.S.)

  3. IPPSO raises Hydro exports in smog negotiations

    International Nuclear Information System (INIS)

    Anon.

    1997-01-01

    The Independent Power Producers of Ontario (IPPSO) requested federal and provincial committees negotiating atmospheric emission standards to review Ontario Hydro's export wheeling plans. IPPSO alleges that Ontario Hydro is preparing to apply pressure on the Canadian export approval process, and is building up a major effort that will increase emissions, contrary to the objectives embodied in a number of environment protection projects such as the Ontario Smog Plan, The Federal-Provincial NOx Management Plan, the Strategic Options Plan, or the Convention on Long-Range Transboundary Air Pollution Draft NOx Protocol Negotiations. IPPSO alleges further that while Ontario Hydro is one of Canada's largest single emitter of greenhouse gases NOx, and SO 2 , and as a public sector corporation it should be the most amenable to serving the public good, the Corporation is doing exactly the opposite: it actively prevents production of electricity from less polluting sources. It is IPPSO's contention that Ontario Hydro's desire to control the Ontario market could come at significant cost to the environment

  4. Hydrological Modeling in Alaska with WRF-Hydro

    Science.gov (United States)

    Elmer, N. J.; Zavodsky, B.; Molthan, A.

    2017-12-01

    The operational National Water Model (NWM), implemented in August 2016, is an instantiation of the Weather Research and Forecasting hydrological extension package (WRF-Hydro). Currently, the NWM only covers the contiguous United States, but will be expanded to include an Alaska domain in the future. It is well known that Alaska presents several hydrological modeling challenges, including unique arctic/sub-arctic hydrological processes not observed elsewhere in the United States and a severe lack of in-situ observations for model initialization. This project sets up an experimental version of WRF-Hydro in Alaska mimicking the NWM to gauge the ability of WRF-Hydro to represent hydrological processes in Alaska and identify model calibration challenges. Recent and upcoming launches of hydrology-focused NASA satellite missions such as the Soil Moisture Active Passive (SMAP) and Surface Water Ocean Topography (SWOT) expand the spatial and temporal coverage of observations in Alaska, so this study also lays the groundwork for assimilating these NASA datasets into WRF-Hydro in the future.

  5. Canadian hydro potential in the North American market

    International Nuclear Information System (INIS)

    Adams, K.

    2002-01-01

    Canada's hydro potential in the North American energy market was discussed. Canada is a net exporter of electricity in North America, and since 1990, has exported an average of 28 Terawatt hours/year to the United States. More than 65 per cent of these exports were generated from hydro power plants. It was emphasized that significant reductions in greenhouse gases can be achieved if Canadian hydroelectricity is substituted for coal power generation. It was also noted that although there may not be enough hydro capacity to meet all of North America's energy requirements, development of new large hydro resources in Canada could help meet the growing demand for electricity in the United States. Hydro can also complement other renewable energy sources such as wind and solar. The factors that will determine if Canadian hydropower will contribute to the energy demand are market mechanisms such as greenhouse gas credit trading systems which provide incentive for renewable energy projects. In addition, the existing infrastructure must be expanded both east and west within Canada and north and south between Canada and the United States. 5 figs

  6. Annual report 1993 (Ontario Hydro, Toronto)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1994-12-31

    Ontario Hydro`s prime objective is to supply the people of Ontario with electricity at cost while maintaining high standards of safety and service. The annual report presents energy efficiency and competitiveness, operations in review, the environmental performance of the Corporation, the future, and choices for a sustainable future. A financial review and analysis is also provided, along with an auditor`s report and financial statements.

  7. Alexela ostab Hydro Texaco tanklaketi / Gert D. Hankewitz

    Index Scriptorium Estoniae

    Hankewitz, Gert D.

    2006-01-01

    Kütusefirma Alexela Oil teatas, et ostab tanklaketi Hydro Texaco kõik Balti riikide tanklad. Diagramm: Alexela ja Hydro Texaco majandusnäitajad. Vt. samas: Statoili juht: ühinemine turul muutusi ei too

  8. On the use of effective stress in three-dimensional hydro-mechanical coupled model

    International Nuclear Information System (INIS)

    Arairo, W.; Prunier, F.; Djeran-Maigre, I.; Millard, A.

    2014-01-01

    In the last decades, a number of hydro-mechanical elastoplastic constitutive models for unsaturated soils have been proposed. Those models couple the hydraulic and mechanical behaviour of unsaturated soils, and take into account the effects of the degree of saturation on the stress-strain behaviour and the effects of deformation on the soil-water characteristic response with a simple reversible part for the hysteresis. In addition, the influence of the suction on the stress-strain behaviour is considered. However, until now, few models predict the stress-strain and soil-water characteristic responses of unsaturated soils in a fully three-dimensional Finite Element code. This paper presents the predictions of an unsaturated soil model in a Three-dimensional Framework, and develops a study on the effect of partial saturation on the stability of shallow foundation resting on unsaturated silty soil. Qualitative predictions of the constitutive model show that incorporating a special formulation for the effective stress into an elastoplastic coupled hydro-mechanical model opens a full range of possibilities in modelling unsaturated soil behaviour. (authors)

  9. Wound bed preparation: A novel approach using HydroTherapy.

    Science.gov (United States)

    Atkin, Leanne; Ousey, Karen

    2016-12-01

    Wounds that fail to heal quickly are often encountered by community nursing staff. An important step in assisting these chronic or stalled wounds progress through healing is debridement to remove devitalised tissue, including slough and eschar, that can prevent the wound from healing. A unique wound treatment called HydroTherapy aims to provide an optimal healing environment. The first step of HydroTherapy involves HydroClean plus™, this dressing enables removal of devitalised tissue through autolytic debridement and absorption of wound fluid. Irrigation and cleansing provided by Ringer's solution from the dressing further removes any necrotic tissue or eschar. Once effective wound bed preparation has been achieved a second dressing, HydroTac™, provides an ongoing hydrated wound environment that enables re-epithelialisation to occur in an unrestricted fashion. This paper presents 3 case studies of slow healing wounds treated with HydroClean plus™ which demonstrates effective wound debridement.

  10. BOT schemes as financial model of hydro power projects

    International Nuclear Information System (INIS)

    Grausam, A.

    1997-01-01

    Build-operate-transfer (BOT) schemes are the latest methods adopted in the developing infrastructure projects. This paper outlines the project financing through BOT schemes and briefly focuses on the factors particularly relevant to hydro power projects. Hydro power development provides not only the best way to produce electricity, it can also solve problems in different fields, such as navigation problems in case of run-of-the river plants, ground water management systems and flood control etc. This makes HPP projects not cheaper, but hydro energy is a clean and renewable energy and the hydro potential worldwide will play a major role to meet the increased demand in future. 5 figs

  11. An artificial intelligence (AI) NOx/heat rate optimization system for Ontario Hydro`s fossil generating stations

    Energy Technology Data Exchange (ETDEWEB)

    Luk, J.; Frank, A.; Bodach, P. [Ontario Hydro, Toronto, ON (Canada); Warriner, G. [Radian International, Tucker, GA (United States); Noblett, J. [Radian International, Austin, TX (United States); Slatsky, M. [Southern Company, Birmingham, AL (United States)

    1999-08-01

    Artificial intelligence (AI)-based software packages which can optimize power plant operations that improves heat rate and also reduces nitrogen oxide emissions are now commonly available for commercial use. This paper discusses the implementation of the AI-based NOx and Heat Rate Optimization System at Ontario Hydro`s generation stations, emphasizing the current AI Optimization Project at Units 5 and 6 of the Lakeview Generating Station. These demonstration programs are showing promising results in NOx reduction and plant performance improvement. The availability of the plant Digital Control System (DCS) in implementing AI optimization in a closed-loop system was shown to be an important criterion for success. Implementation of AI technology at other Ontario Hydro fossil generating units as part of the overall NOx emission reduction system is envisaged to coincide with the retrofit of the original plant control system with the latest DCS systems. 14 refs., 3 figs.

  12. GRADSPH: A parallel smoothed particle hydrodynamics code for self-gravitating astrophysical fluid dynamics

    NARCIS (Netherlands)

    Vanaverbeke, S.; Keppens, R.; Poedts, S.; Boffin, H.

    2009-01-01

    We describe the algorithms implemented in the first version of GRADSPH, a parallel, tree-based, smoothed particle hydrodynamics code for simulating self-gravitating astrophysical systems written in FORTRAN 90. The paper presents details on the implementation of the Smoothed Particle Hydro (SPH)

  13. Development and applications of reactor noise analysis at Ontario Hydro`s CANDU reactors

    Energy Technology Data Exchange (ETDEWEB)

    Gloeckler, O [Ontario Hydro, Toronto, ON (Canada); Tulett, M V [Ontario Hydro, Pickering, ON (Canada). Pickering Generating Station

    1996-12-31

    In 1992 a program was initiated to establish reactor noise analysis as a practical tool for plant performance monitoring and system diagnostics in Ontario Hydro`s CANDU reactors. Since then, various CANDU-specific noise analysis applications have been developed and validated. The noise-based statistical techniques are being successfully applied as powerful troubleshooting and diagnostic tools to a wide variety of actual operational I and C problems. The dynamic characteristics of critical plant components, instrumentation and processes are monitored on a regular basis. Recent applications of noise analysis include (1) validating the dynamics of in-core flux detectors (ICFDS) and ion chambers, (2) estimating the prompt fraction ICFDs in noise measurements at full power and in power rundown tests, (3) identifying the cause of excessive signal fluctuations in certain flux detectors, (4) validating the dynamic coupling between liquid zone control signals, (5) detecting and monitoring mechanical vibrations of detector tubes induced by moderator flow, (6) estimating the dynamics and response time of RTD (Resistance Temperature Detector) temperature signals, (7) isolating the cause of RTD signal anomalies, (8) investigating the source of abnormal flow signal behaviour, (9) estimating the overall response time of flow and pressure signals, (10) detecting coolant boiling in fully instrumented fuel channels, (11) monitoring moderator circulation via temperature noise, and (12) predicting the performance of shut-off rods. Some of these applications are performed on an as-needed basis. The noise analysis program, in the Pickering-B station alone, has saved Ontario Hydro millions of dollars during its first three years. The results of the noise analysis program have been also reviewed by the regulator (Atomic Energy Control Board of Canada) with favorable results. The AECB have expressed interest in Ontario Hydro further exploiting the use of noise analysis technology. (author

  14. Assessment of SPACE Code Using the LSTF 10% MSLB Test

    International Nuclear Information System (INIS)

    Kim, Yo Han; Yang, Chang Keun; Ha, Sang Jun

    2012-01-01

    The Korea Nuclear Hydro and Nuclear Power Co. (KHNP) has developed a multipurpose nuclear safety analysis code called the Safety and Performance Analysis Code for Nuclear Power Plants (SPACE). The SPACE is a best-estimated two-phase three-field thermal-hydraulic analysis code used to analyze the safety and performance of pressurized water reactors (PWRs). As in the second phase of the project, the beta version of the code has been developed through the validation and verification (V and V) using integral loop test data or plant operating data and the complement of code to solve the SPACE code user problem and resolution reports. In this study, the Large Scale Test Facility (LSTF) 10% main steam line break (MSLB) test, SB-SL-01, was simulated as a V and V work. The results were compared with the experimental data and those of the RELAP5/MOD3.1 code simulation

  15. The different modes of hydro-economic analysis (Invited)

    Science.gov (United States)

    Harou, J. J.; Binions, O.; Erfani, T.

    2013-12-01

    In the face of growing water demands, climate change and spatial and temporal water access variability, accurately assessing the economic impacts of proposed water resource management changes is useful. The objective of this project funded by UK Water Industry Research was to present and demonstrate a framework for identifying and using the ';value of water' to enable water utilities and their regulators to make better decisions. A hydro-economic model can help evaluate water management options in terms of their hydrological and economic impact at different locations throughout a catchment over time. In this talk we discuss three modes in which hydro-economic models can be implemented: evaluative, behavioral and prescriptive. In evaluation mode economic water demand and benefit functions are used to post-process water resource management model results to assess the economic impacts (over space and time) of a policy under consideration. In behavioral hydro-economic models users are represented as agents and the economics is used to help predict their actions. In prescriptive mode optimization is used to find the most economically efficient management actions such as allocation patterns or source selection. These three types of hydro-economic analysis are demonstrated on a UK watershed (Great River Ouse) that includes 97 different water abstractors from amongst the public water supply, agriculture, industry and energy plant cooling sectors. The following issues under dry and normal historical conditions were investigated: Supply/demand investment planning, societal cost of environmental flows, water market prices, and scarcity-sensitive charges for water rights. The talk discusses which hydro-economic modeling mode is used to study each of these issues and why; example results are shown and discussed. The topic of how hydro-economic models can be built and deployed effectively is covered along with how existing water utility operational and planning tools can be

  16. Overview of Hydrometeorologic Forecasting Procedures at BC Hydro

    Science.gov (United States)

    McCollor, D.

    2004-12-01

    Energy utility companies must balance production from limited sources with increasing demand from industrial, business, and residential consumers. The utility planning process requires a balanced, efficient, and effective distribution of energy from source to consumer. Therefore utility planners must consider the impact of weather on energy production and consumption. Hydro-electric companies should be particularly tuned to weather because their source of energy is water, and water supply depends on precipitation. BC Hydro operates as the largest hydro-electric company in western Canada, managing over 30 reservoirs within the province of British Columbia, and generating electricity for 1.6 million people. BC Hydro relies on weather forecasts of watershed precipitation and temperature to drive hydrologic reservoir inflow models and of urban temperatures to meet energy demand requirements. Operations and planning specialists in the company rely on current, value-added weather forecasts for extreme high-inflow events, daily reservoir operations planning, and long-term water resource management. Weather plays a dominant role for BC Hydro financial planners in terms of sensitive economic responses. For example, a two percent change in hydropower generation, due in large part to annual precipitation patterns, results in an annual net change of \\50 million in earnings. A five percent change in temperature produces a \\5 million change in yearly earnings. On a daily basis, significant precipitation events or temperature extremes involve potential profit/loss decisions in the tens of thousands of dollars worth of power generation. These factors are in addition to environmental and societal costs that must be considered equally as part of a triple bottom line reporting structure. BC Hydro water resource managers require improved meteorological information from recent advancements in numerical weather prediction. At BC Hydro, methods of providing meteorological forecast data

  17. BC Hydro triple bottom line report 2002

    International Nuclear Information System (INIS)

    Anon

    2002-08-01

    British Columbia Hydro (BC Hydro) published this document which measures the environmental, social and economic performance of the company. It is a complement to BC Hydro's 2002 Annual Report. The report was prepared to better understand the company's business in terms of its commitment to being an environmentally, socially, and economically responsible company (the three bottom lines). BC Hydro proved its ability to integrate the three bottom lines in decision making processes by carefully examining the environmental, social and economical impacts of programs such as Power Smart, Green and Alternative Energy, and Water Use Planning. All indicators point to BC Hydro achieving its commitment of providing a minimum of 10 per cent of new demand through 2010 with new green energy sources. Water Use Plans were developed for hydroelectric generating stations, and they should all be in place by 2003. Efficiencies realised through the Power Smart program offset the increases in greenhouse gas associated with increased energy demand. Juvenile sturgeon raised in a hatchery were released into the Columbia River in May 2002. The completion of a 40-kilometre trail on the Sunshine Coast was helped by a financial contribution from BC Hydro in the amount of 23,000 dollars. Safety improvements were implemented at eight facilities, such as dam remediation, dam surveillance and instrumentation updates. Scholarships were awarded across the province, along with additional donations to non-profit organizations. Co-op positions were provided for 150 students. Internal energy efficiency programs were successful. Planning is under way for significant maintenance work and equipment replacement projects as the transmission and distribution infrastructure ages. The number of reported indicators was expanded this year. In turn, they were aligned with the revised Global Reporting Initiative (GRI) guidelines. tabs

  18. Ontario Hydro Research Division annual report 1988

    International Nuclear Information System (INIS)

    1988-01-01

    The Research Division of Ontario Hydro conducts research in the fields of chemistry, civil engineering, electrical engineering, mechanical engineering, metallurgy, and operations. Much of the research has a bearing on the safe, environmentally benign operation of Ontario Hydro's nuclear power plants. Particular emphasis has been placed on nuclear plant component aging and plant life assurance

  19. Impact of flocculation on flotation tailing's hydro-cycloning properties

    Directory of Open Access Journals (Sweden)

    Knežević Dinko N.

    2014-01-01

    Full Text Available Research results of hydro-cycloning of flocculated and non-flocculated flotation tailing from the lead and zinc open pit mine 'Suplja stijena', Sula - Montenegro have been shown in this paper. Reason for this research was finding conditions in order to separate fraction that is suitable for embankment erection. Flotation tailings has been tested in the very state that it goes out from the flotation process and tailings which is flocculated by anionic flocculant. The object was to determine the impact of flocculation on properties of hydro-cycloning products and disposal process. In hydro-cycloning process greater underflow mass is being separated with non-flocculated tailing. Values of geomechanical parameters are significantly different, especially hydro-cyclone's underflow. All geomechanical parameters of hydro-cyclone's underflow are suitable for erecting embankment which shall be made from non-flocculated tailing. Underflow drainage of non-flocculated tailing is faster while overflow drainage is slower and problematic with both tailings.

  20. Competition policy and regulation in hydro-dominated electricity markets

    International Nuclear Information System (INIS)

    Rangel, Luiz Fernando

    2008-01-01

    This paper discusses the main competition issues that arise in electricity systems dominated by hydro generation, arguing that technological differences between hydro and thermal plants may allow hydropower producers to exert market power in different and subtler ways compared to thermal generators. The key for market power in hydro-based systems is the strategic allocation of a given amount of output across periods, rather than a straightforward reduction of total output. The paper examines the interaction between strategic hydro reservoir operation and transmission capacity constraints, and summarizes the implications of market power for system reliability. A review of recent relevant literature is included. Finally, possible interventions to mitigate market power are analysed

  1. Energy supply technologies. Hydro, ocean, wave and tidal

    Energy Technology Data Exchange (ETDEWEB)

    Fenhann, J.; Larsen, Hans [Risoe National Lab. - DTU (Denmark)

    2007-11-15

    This chapter presents an overview of current hydro, ocean, wave and tidal initiatives. Large hydro remains one of the lowest-cost generating technologies, although environmental constraints, resettlement impacts and the limited availability of sites have restricted further growth in many countries. Large hydro supplied 16 % of global electricity in 2004, down from 19 % a decade ago. Large hydro capacity totalled about 720 GW worldwide in 2004 and has grown historically at slightly more than 2 % annually. China installed nearly 8 GW of large hydro in 2004, taking the country to number one in terms of installed capacity (74 GW). With the completion of the Three Gorges Dam, China will add some 18.2 GW of hydro capacity in 2009. The socio-economic benefits of hydro include improved flood control and water supply. The socio-economic benefits of hydro include improved flood control and water supply. The socio-economic cost of hydro includes displacements and submergence. Further hydro can improve peak-capacity management. Ocean currents, some of which runs close to European coasts, carry a lot of kinetic energy. Part of this energy can be captured by sub-marine windmills and converted into electricity. These are more compact than the wind turbines used on land, simply because water is much denser than air. The main European countries with useful current power potential are France and the UK. Ocean tides are driven by the gravitational pull of the moon. With one high tide every 12 hours, a tidal power plant can operate for only four or five hours per cycle, so power from a single plant is intermittent. A suitably-designed tidal plant can, however, operate as a pimped storage system, using electricity during periods of low demand to store energy that can be recovered later. The only large, modern example of a tidal power plant is the 240 MW La Rance plant, built in France in the 1960s, which represents 91 % of the world tidal power capacity. Wave energy can be seen as

  2. Hydro turbines: An introduction

    International Nuclear Information System (INIS)

    Gordon, J.L.

    1993-01-01

    The various types of hydraulic turbines currently used in hydroelectric power plants are described. The descriptions are intended for use by non-engineers who are concerned with fish passage and fish mortality at a hydro power facility. Terminology used in the hydro industry is explained. Since the extent of cavitation is one of the factors affecting mortality rates of fish passing through hydraulic turbines, an equation is introduced which measures the extent of cavitation likely to be experienced in a turbine. An example of how the cavitation index can be calculated is provided for two typical power plants. The relation between certain parameters of power plant operation and the extent of cavitation, and therefore of fish mortality, is illustrated. 2 refs., 14 figs

  3. Architecture at Hydro-Quebec

    Energy Technology Data Exchange (ETDEWEB)

    1991-01-01

    Architecture at Hydro-Quebec is concerned not only with combining function and aesthetics in designing buildings and other structures for an electrical utility, but also to satisfy technical and administrative needs and to help solve contemporary problems such as the rational use of energy. Examples are presented of Hydro-Quebec's architectural accomplishments in the design of hydroelectric power stations and their surrounding landscapes, thermal power stations, transmission substations, research and testing facilities, and administrative buildings. It is shown how some buildings are designed to adapt to local environments and to conserve energy. The utility's policy of conserving installations of historic value, such as certain pre-1930 power stations, is illustrated, and aspects of its general architectural policy are outlined. 20 figs.

  4. Thermal-hydraulic interfacing code modules for CANDU reactors

    Energy Technology Data Exchange (ETDEWEB)

    Liu, W.S.; Gold, M.; Sills, H. [Ontario Hydro Nuclear, Toronto (Canada)] [and others

    1997-07-01

    The approach for CANDU reactor safety analysis in Ontario Hydro Nuclear (OHN) and Atomic Energy of Canada Limited (AECL) is presented. Reflecting the unique characteristics of CANDU reactors, the procedure of coupling the thermal-hydraulics, reactor physics and fuel channel/element codes in the safety analysis is described. The experience generated in the Canadian nuclear industry may be useful to other types of reactors in the areas of reactor safety analysis.

  5. Thermal-hydraulic interfacing code modules for CANDU reactors

    International Nuclear Information System (INIS)

    Liu, W.S.; Gold, M.; Sills, H.

    1997-01-01

    The approach for CANDU reactor safety analysis in Ontario Hydro Nuclear (OHN) and Atomic Energy of Canada Limited (AECL) is presented. Reflecting the unique characteristics of CANDU reactors, the procedure of coupling the thermal-hydraulics, reactor physics and fuel channel/element codes in the safety analysis is described. The experience generated in the Canadian nuclear industry may be useful to other types of reactors in the areas of reactor safety analysis

  6. Hydro-Quebec's buyback tariff

    International Nuclear Information System (INIS)

    Richard, J.C.

    1992-01-01

    Hydro-Quebec had an installed electric generation capacity of 25,682 MW in 1990, of which 23,927 MW was hydraulic. Of the 26 thermal power plants, 22 are in remote communities on islands or in the north part of the province. The utility's development plan predicts an annual growth in demand of 2.6% to reach ca 200 TWh in 2006; this demand would be reduced to ca 180 TWh by energy efficiency measures. To increase capacity, Hydro-Quebec can utilize the hydro generation potential of its large rivers, of which 18,000 MW is economically viable, and its small rivers. Of the 10,000 MW theoretical potential of the latter, a large fraction cannot be economically developed under existing conditions. The utility has a policy to purchase energy as a function of the price of fossil fuel. For wind energy, this price was 4.22 cents/kWh in 1991; this price will be increased annually according to the inflation index. In its isolated sites such as the Magdalen Islands, current costs of diesel-generated electricity are at least 5.5 cents/kWh. There are possibilities for installing wind plants in isolated regions but their automatic control systems need to be improved for achieving a larger utilization factor relative to diesel generation and their cost needs to be reduced. 1 tab

  7. The HydroShare Collaborative Repository for the Hydrology Community

    Science.gov (United States)

    Tarboton, D. G.; Idaszak, R.; Horsburgh, J. S.; Ames, D. P.; Goodall, J. L.; Couch, A.; Hooper, R. P.; Dash, P. K.; Stealey, M.; Yi, H.; Bandaragoda, C.; Castronova, A. M.

    2017-12-01

    HydroShare is an online, collaboration system for sharing of hydrologic data, analytical tools, and models. It supports the sharing of, and collaboration around, "resources" which are defined by standardized content types for data formats and models commonly used in hydrology. With HydroShare you can: Share your data and models with colleagues; Manage who has access to the content that you share; Share, access, visualize and manipulate a broad set of hydrologic data types and models; Use the web services application programming interface (API) to program automated and client access; Publish data and models and obtain a citable digital object identifier (DOI); Aggregate your resources into collections; Discover and access data and models published by others; Use web apps to visualize, analyze and run models on data in HydroShare. This presentation will describe the functionality and architecture of HydroShare highlighting our approach to making this system easy to use and serving the needs of the hydrology community represented by the Consortium of Universities for the Advancement of Hydrologic Sciences, Inc. (CUAHSI). Metadata for uploaded files is harvested automatically or captured using easy to use web user interfaces. Users are encouraged to add or create resources in HydroShare early in the data life cycle. To encourage this we allow users to share and collaborate on HydroShare resources privately among individual users or groups, entering metadata while doing the work. HydroShare also provides enhanced functionality for users through web apps that provide tools and computational capability for actions on resources. HydroShare's architecture broadly is comprised of: (1) resource storage, (2) resource exploration website, and (3) web apps for actions on resources. System components are loosely coupled and interact through APIs, which enhances robustness, as components can be upgraded and advanced relatively independently. The full power of this paradigm is the

  8. Revitalizing the nuclear business at Ontario Hydro

    International Nuclear Information System (INIS)

    Talbot, K.

    1994-01-01

    Ontario Hydro, North America's largest electric power utility, with an installed capacity of 34,000 MW, has under gone a major restructuring over the past year to better align itself with a changing electricity market and evolving customer needs. The single largest new business unit within the new Ontario Hydro is Ontario Hydro Nuclear (OHN), responsible for engineering, operation and maintenance of the Corporation's 20 large nuclear units at three generating sites, OHN faces a significant challenge in returning Ontario's nuclear units to the world-leading performance levels they enjoyed in the past, particularly the older Pickering A and Bruce A plants. However, steady progress is being made as evidenced by improving peer reviews and overall capacity and financial performance

  9. The political economy of Canadian hydro-electricity : between old provincial hydros and neoliberal regional energy regimes

    International Nuclear Information System (INIS)

    Netherton, A.

    2007-01-01

    In economic terms, hydro-electricity is considered as a quasi-staple, as it prone to the classic staples problem of excess capacity. However, neither water nor hydroelectricity in Canada is produced primarily for export markets. Hydroelectric systems are often thought of as politicized monopolies. This paper discussed changes that have occurred in hydroelectric organizations over time, as they have been governed by a formative mixed regime; postwar provincial hydro systems; a megaprojects regime; and an emerging sustainability regionalization regime. The origins of electricity generation and transmission in Canada were discussed, as well as the ecological footprint of large mega-projects on rivers. The development of provincial hydro monopolies during the mid- to late- twentieth century was also outlined, as well as the sustainability and regionalization regime that developed after 1990. During the mature staples period of the mid-century, rents in hydro-electric organizations were distributed through cheap rates to subsidize and facilitate the development of mass production and mass consumption. However, post-staples consumption has now replaced mass consumption, and demand side management is replacing earlier cheap power policies. Nonetheless, the lack of systematic integration of networks has led to inefficiencies. Provincial grids are now being integrated into interconnected North American regional networks regulated by the United States. It was concluded that the Canadian electricity regime is increasingly influenced by the the supranational role that the United States is playing in structuring markets. 83 refs

  10. Design, construction and operation of Ontario Hydro's CANDU plants

    International Nuclear Information System (INIS)

    Campbell, P.G.

    1981-06-01

    Ontario Hydro has been producing electricity commercially from nuclear power since 1968, using CANDU reactors which have proved enormously successful. The 206-MW Douglas Point station, nearly 10 times larger than the first Canadian power reactor, NPD-2, resulted from a cooperative effort between Atomic Energy of Canada Ltd., the provincial government of Ontario, and Ontario Hydro. This approach led to a basic working relationship between the parties, with Ontario Hydro acting as project manager and builder, and AECL acting as consultant with respect to the nuclear components. Before Douglas Point was fully commissioned Ontario Hydro was ready to commit itself to more nuclear stations, and work was started on the four-unit Pickering nuclear generating station. Multi-unit stations were adopted to achieve economies of scale, and the concept has been retained for all subsequent nuclear power plants constructed in the province. The organization of Ontario Hydro's project management, construction, and operation of nuclear generating stations is described. Performance of the existing stations and cost of the power they produce have been entirely acceptable

  11. Toronto Hydro annual report, 1992

    International Nuclear Information System (INIS)

    1993-01-01

    Toronto Hydro is the electric utility serving about 219,000 customers in Toronto, Ontario. In 1992, the utility purchased 9.6 billion kWh of electricity from Ontario Hydro, down 3.6% from 1990. Energy sales totalled 9.2 billion kWh, down 4.1% from 1990. Retail electricity rates increased an average of 6.7% in 1992, in spite of an increase in Ontario Hydro's wholesale rate by 8.2%, due to better than anticipated financial results and cost-control measures. The decline in electricity purchases and sales are attributed to economic factors, which also contributed to an increase in the utility's provision for bad debts. The third year of a 13.8-kV conversion project was completed in 1992; this project is converting the existing 4 kV distribution system to the higher voltage since maintenance and repair of the existing system is costly and the equipment is becoming less reliable. New construction, refurbishing, and modernization of equipment were performed at a number of substations. Other improvements in 1992 are reported in the areas of management and engineering systems, personnel policies, work safety, and energy management. Financial statements are included. 11 figs., 4 tabs

  12. Distributionally robust hydro-thermal-wind economic dispatch

    International Nuclear Information System (INIS)

    Chen, Yue; Wei, Wei; Liu, Feng; Mei, Shengwei

    2016-01-01

    Highlights: • A two-stage distributionally robust hydro-thermal-wind model is proposed. • A semi-definite programing equivalent and its algorithm are developed. • Cases that demonstrate the effectiveness of the proposed model are included. - Abstract: With the penetration of wind energy increasing, uncertainty has become a major challenge in power system dispatch. Hydro power can change rapidly and is regarded as one promising complementary energy resource to mitigate wind power fluctuation. Joint scheduling of hydro, thermal, and wind energy is attracting more and more attention nowadays. This paper proposes a distributionally robust hydro-thermal-wind economic dispatch (DR-HTW-ED) method to enhance the flexibility and reliability of power system operation. In contrast to the traditional stochastic optimization (SO) and adjustable robust optimization (ARO) method, distributionally robust optimization (DRO) method describes the uncertain wind power output by all possible probability distribution functions (PDFs) with the same mean and variance recovered from the forecast data, and optimizes the expected operation cost in the worst distribution. Traditional DRO optimized the random parameter in entire space, which is sometimes contradict to the actual situation. In this paper, we restrict the wind power uncertainty in a bounded set, and derive an equivalent semi-definite programming (SDP) for the DR-HTW-ED using S-lemma. A delayed constraint generation algorithm is suggested to solve it in a tractable manner. The proposed DR-HTW-ED is compared with the existing ARO based hydro-thermal-wind economic dispatch (AR-HTW-ED). Their respective features are shown from the perspective of computational efficiency and conservativeness of dispatch strategies.

  13. Ontario Hydro looks at security

    International Nuclear Information System (INIS)

    Green, B.J.; Kee, B.

    1995-01-01

    Ontario Hydro operates 20 CANDU reactors on three different sites. Since 1984, a review of security arrangements on all the sites has taken place on a five-yearly basis. The review process for 1995 is outlined. The three objectives were as follows: to assess current security threats and risks to the stations; to assess the adequacy of the existing programme to protect against current threats; by comparing the security programme against those of comparable entities to establish benchmarks for good practice as a basis for improvements at Ontario Hydro. Valuable insights gained through the review are listed. These could be useful to other utilities. (UK)

  14. Optimal hydro scheduling and offering strategies considering price uncertainty and risk management

    International Nuclear Information System (INIS)

    Catalão, J.P.S.; Pousinho, H.M.I.; Contreras, J.

    2012-01-01

    Hydro energy represents a priority in the energy policy of Portugal, with the aim of decreasing the dependence on fossil fuels. In this context, optimal hydro scheduling acquires added significance in moving towards a sustainable environment. A mixed-integer nonlinear programming approach is considered to enable optimal hydro scheduling for the short-term time horizon, including the effect of head on power production, start-up costs related to the units, multiple regions of operation, and constraints on discharge variation. As new contributions to the field, market uncertainty is introduced in the model via price scenarios and risk management is included using Conditional Value-at-Risk to limit profit volatility. Moreover, plant scheduling and pool offering by the hydro power producer are simultaneously considered to solve a realistic cascaded hydro system. -- Highlights: ► A mixed-integer nonlinear programming approach is considered for optimal hydro scheduling. ► Market uncertainty is introduced in the model via price scenarios. ► Risk management is included using conditional value-at-risk. ► Plant scheduling and pool offering by the hydro power producer are simultaneously considered. ► A realistic cascaded hydro system is solved.

  15. Interconnected hydro-thermal systems - Models, methods, and applications

    DEFF Research Database (Denmark)

    Hindsberger, Magnus

    2003-01-01

    to be performed where the uncertainty of the inflow to the hydro reservoirs is handled endogenously. In this model snow reservoirs have been added in addition to the hydro reservoirs. Using this new approach allows sampling based decomposition algorithms to be used, which have proved to be efficient in solving...

  16. Multi-scale modelling of the hydro-mechanical behaviour of argillaceous rocks

    International Nuclear Information System (INIS)

    Van den Eijnden, Bram

    2015-01-01

    theoretical developments of this extension are implemented in the finite element code Lagamine (Liege) as an independent constitutive relation. For the modelling of localization of deformation, which in classical FE methods suffers from the well-known mesh dependency, the double-scale approach of hydro-mechanical coupling is combined with a local second gradient model to control the internal length scale of localized deformation. By accepting the periodic boundary conditions as a regularization of the microscale deformation, the use of the multi-scale model in combination with the local second gradient model can be used for modelling localization phenomena in HM-coupled settings with material softening. The modelling capacities of the approach are demonstrated by means of simulations of odometer tests and biaxial compression tests. The approach is demonstrated to be a powerful way to model anisotropy in the mechanical as well as the hydraulic behaviour of the material both in the initial material state and as an effect of hydro-mechanical alterations. For the application to the modelling of Callovo-Oxfordian clay-stone, microstructural REVs are calibrated to geometrical characteristics of the inclusion that form the microstructure under consideration and to macro-scale experimental results of the mechanical behaviour. The calibrated constitutive relation is used in the simulation of gallery excavation processes. These computations give a proof of concept of the double-scale assessment of the hydro-mechanical behaviour of the excavation damaged zones around galleries in the context of nuclear waste disposal. (author) [fr

  17. Deconstructing hydro: the BC electricity sector in this decade

    International Nuclear Information System (INIS)

    Jaccard, M.

    2001-01-01

    This paper provided speculation regarding the world-wide trend to deregulate electric utilities with particular focus on power deregulation in British Columbia. The four main issues facing electricity reform in British Columbia are to determine if publicly-owned assets should be privatised, how to achieve competitive electricity commodity prices in a de-regulated generation market, to determine the extent to which customers will be allowed direct access to sellers of electricity, and to determine which changes in industry structure are needed to ensure that control over the common carrier does not hinder fair competition. BC Hydro recently issued a plan for the next decade entitled the Integrated Electricity Plan which suggests that almost all growth in supply on the Hydro system will be limited to a few large projects totalling 900 megawatts, to be owned and operated by either BC Hydro or by the Columbia Power Corporation, another Crown entity. This plan is in complete contrast to the evolution of the electricity industry nearly everywhere else in the world where demand growth is being met almost entirely by small- and medium-scale non-utility resources issuing from competitive markets with minimal public funding. This article looks at why BC Hydro will probably be transformed significantly, even dismantled, in the coming decade. The article begins with a section explaining the cause and effects of major changes in the world-wide electricity industry. This is followed by a section reviewing what BC Hydro did in the 1990s while reform was taking place. The article also describes what BC Hydro intends to do in the next decade and explores reasons why this outcome is unlikely. The final section of the article provides an alternative vision of BC Hydro's future over the next decade. 1 tab., 3 figs

  18. Integrated Hydro-geomorphological Monitoring System of the Upper Bussento river basin (Cilento and Vallo Diano Geopark, S-Italy)

    Science.gov (United States)

    Guida, D.; Cuomo, A.; Longobardi, A.; Villani, P.; Guida, M.; Guadagnuolo, D.; Cestari, A.; Siervo, V.; Benevento, G.; Sorvino, S.; Doto, R.; Verrone, M.; De Vita, A.; Aloia, A.; Positano, P.

    2012-04-01

    The Mediterranean river ecosystem functionings are supported by river-aquifer interactions. The assessment of their ecological services requires interdisciplinary scientific approaches, integrate monitoring systems and inter-institutional planning and management. This poster illustrates the Hydro-geomorphological Monitoring System build-up in the Upper Bussento river basin by the University of Salerno, in agreement with the local Basin Autorities and in extension to the other river basins located in the Cilento and Vallo Diano National Park (southern Italy), recently accepted in the European Geopark Network. The Monitoring System is based on a hierarchical Hydro-geomorphological Model (HGM), improved in a multiscale, nested and object-oriented Hydro-geomorphological Informative System (HGIS, Figure 1). Hydro-objects are topologically linked and functionally bounded by Hydro-elements at various levels of homogeneity (Table 1). Spatial Hydro-geomorpho-system, HG-complex and HG-unit support respectively areal Hydro-objects, as basin, sector and catchment and linear Hydro-objects, as river, segment, reach and section. Runoff initiation points, springs, disappearing points, junctions, gaining and water losing points complete the Hydro-systems. An automatic procedure use the Pfafstetter coding to hierarchically divide a terrain into arbitrarily small hydro-geomorphological units (basin, interfluve, headwater and no-contribution areas, each with a unique label with hierarchical topological properties. To obtain a hierarchy of hydro-geomorphological units, the method is then applied recursively on each basin and interbasin, and labels of the subdivided regions are appended to the existing label of the original region. The monitoring stations are ranked consequently in main, secondary, temporary and random and located progressively at the points or sections representative for the hydro-geomorphological responses by validation control and modeling calibration. The datasets

  19. Fouling in small hydro projects; Verschmutzung von Kleinwasserkraftwerken - Schlussbericht

    Energy Technology Data Exchange (ETDEWEB)

    Abgottspon, A.; Staubli, T.

    2010-03-15

    This comprehensive final report for the Swiss Federal Office of Energy (SFOE) takes a look at fouling problems encountered in small hydro installations. The report is based on ten interviews made with operators of small hydro power stations in Switzerland. A parallel project carried out in Germany is mentioned. A large variation in the degree of fouling in the various hydro power stations is noted. Sources such as leaves in autumn and algae are discussed, as are the various rinsing procedures used to clear the turbines of fouling. Power losses are discussed and measures that can be taken to prevent fouling are described. Measurements made at an installation in Freienstein, Switzerland, are presented and discussed. The report is completed with an appendix containing calculations, details on the Freienstein power plant and the results of interviews made with the ten hydro power installations examined.

  20. HydroPak: concept design and analysis of a packaged cross-flow turbine

    International Nuclear Information System (INIS)

    2004-01-01

    This report summarises the findings of a project to complete the conceptual design and economic optimization of a modular standardised crossflow hydro-turbine. Details are given of the work to date, the comparison of HydroPak cost with conventional micro- and mini-hydro power costs, and the economic advantages of taking the ''packaged'' and ''standardised approaches'' to the design process. The market for mini-hydro turbines is discussed

  1. Hydro-Quebec's Strategic Plan 2002-2006 : summary

    International Nuclear Information System (INIS)

    2001-01-01

    A corporate profile of Hydro-Quebec was presented and the strategy that the utility will adopt for the 2002-2006 period was summarized. The utility plans to maintain its service quality and sustain environmental quality while developing a world class enterprise. Quebec has adopted a heritage pool giving Quebec consumers access to a maximum of 165 TWh of electricity per year at an average commodity rate of 2.79 cents per kilowatt-hour, the lowest rate for such a large amount of energy in North America. Above that volume, supply for the Quebec market will be ensured through competitive bidding, leading to the signing of supply contracts based on market price. Hydro-Quebec's strategy reflects the business opportunities open to Hydro-Quebec given its traditional activities in the province, the restructuring of North American energy markets, and the emergence of Quebec as a major energy hub. The business opportunities come from the fact that demand for electricity in Quebec is growing and from the opening of markets close to Quebec. Investment outlook in hydroelectric generation and transmission also appears to be profitable. It is likely that investment will be needed to build infrastructure. Hydro-Quebec is also working with its qualified workforce to develop a world-class international activity base. tabs., figs

  2. HydroViz: evaluation of a web-based tool for improving hydrology education

    Science.gov (United States)

    Habib, E.; Ma, Y.; Williams, D.; Sharif, H.; Hossain, F.

    2012-02-01

    HydroViz is a web-based, student-centered, highly visual educational tool designed to support active learning in the field of Engineering Hydrology. The development of HydroViz is informed by recent advances in hydrologic data, numerical simulations, visualization and web-based technologies. An evaluation study was conducted to determine the effectiveness of HydroViz, to examine the buy-in of the program, and to identify project components that need to be improved. A total of 182 students from seven freshmen and junior-/senior-level undergraduate classes in three universities participated in the study over the course of two semesters (spring 2010 and fall 2010). Data sources included homework assignments, online surveys, and informal interviews with students. Descriptive statistics were calculated for homework and the survey. Qualitative analysis of students' comments and informal interview notes were also conducted to identify ideas and patterns. HydroViz was effective in facilitating students' learning and understanding of hydrologic concepts and increasing related skills. Students had positive perceptions of various features of HydroViz and they believe that HydroViz fits well in the curriculum. The experience with HydroViz was somewhat effective in raising freshmen civil engineering students' interest in hydrology. In general, HydroViz tend to be more effective with students in junior- or senior-level classes than students in freshmen classes. There does not seem to be obvious differences between different universities. Students identified some issues that can be addressed to improve HydroViz. Future adaptation and expansion studies are under planning to scale-up the application and utility of HydroViz into various hydrology and water-resource engineering curriculum settings.

  3. Your energy team : Hydro Mississauga 1998 annual report

    International Nuclear Information System (INIS)

    1999-01-01

    An operational and financial review of Hydro Mississauga for fiscal year 1998 is presented. Hydro Mississauga has been serving the municipality of Mississauga, Ontario for the past 82 years. In 1998, Hydro Mississauga went through major restructuring to include a new competitive 'Services' Division which offers a wide range of competitive products and services. Despite deregulation and restructuring, quality of service was maintained and all-time performance records were set for company safety and system reliability. Operating costs were also cut and low rates continued. The residential rate freeze will be extended for a sixth straight year into 1999. Consolidated financial statements show that in 1998 Hydro Mississauga was 100 per cent debt free. One of the top priorities for the utility in 1998 was to get ready to deal with any problem that might arise as we roll over into the year 2000. The utility has completed an inventory of all computer software and equipment and has taken measures such as remediation, testing and getting vendor assurances. tabs., figs

  4. The power of commitment : Newfoundland and Labrador Hydro 2000 annual report

    International Nuclear Information System (INIS)

    2000-01-01

    A consolidated review of the operations of Newfoundland and Labrador Hydro (Hydro) was presented with particular focus on energy production, energy sales, the Avalon Transmission upgrade, development of the Granite Canal and Hydro's dam safety program. Hydro reported a 4.5 per cent increase in gross energy production at their generating plants throughout the system. Production from hydro sources also increased by 4.5 per cent to a total of 5,032 GWh. Thermal production from the Holyrood generating facility also increased slightly to 1,040 GWh. Production for peaking and emergency requirements from gas turbines and diesel plants dropped to 0.6 GWh. In 2000, about 83 per cent of all the energy supplied to their customers came from hydro sources. Total energy sales were up 4.6 per cent during 2000. This annual report presented the company's financial performance, executive changes, rural rate inquiry, and reorganization. Financial statements included a thorough review and analysis of financial transactions, the auditor's report, and the customary notes to the consolidated financial statement including balance sheets, assets, liabilities and capital. tabs., figs

  5. Analysis of the Hydro-Quebec development plan 1992-2010

    International Nuclear Information System (INIS)

    Bernard, J.-T.; Genest-Laplante, E.

    1994-01-01

    In November 1992, the Quebec provincial utility Hydro-Quebec presented its development plan for the 1992-2010 period and shortly thereafter introduced its 1993-1995 energy efficiency commitments. The plan is analyzed using a model that incorporates the main institutional features of electricity price setting. Two scenarios are constructed. The first incorporates Hydro-Quebec's electricity demand forecast and the second allows electricity demand to respond to its price. A comparative analysis shows that electricity demand in the province should increase faster than forecast by Hydro-Quebec until 2010. In fact, demand could exceed the predicted level by ca 16 TWh, or 8.6%. This larger increase is due to a fall in the real price of electricity, itself caused by a government imposed fall in the real unit cost of the utility's operation. This last constraint is the real challenge faced by Hydro-Quebec. 12 refs., 7 tabs

  6. Full cost accounting for decision making at Ontario Hydro

    International Nuclear Information System (INIS)

    Plagiannakos, T.

    1996-01-01

    Ontario Hydro's approach to full cost accounting (FCA) was outlined in response to questions raised earlier, in another forum, regarding Ontario Hydro's views on FCA. FCA was defined as an evaluation framework (as opposed to an accounting system) which tries to account for the internal (private) as well as the external (environment and human health) costs and benefits and integrate them into business decisions. When the external impacts cannot be monetized, qualitative evaluations are used based on the damage costing approach, which Ontario Hydro prefers to the cost of control method recommended by its critics. In general, however, Ontario Hydro is not opposed to FCA in so far as it puts the Utility in a better position to make more informed decisions, improve environmental cost management, avoid future costs, enhance revenue, improve environmental quality, contribute to environmental policy, and contribute to sustainable development. 1 fig

  7. HydroPak: concept design and analysis of a packaged cross-flow turbine

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-07-01

    This report summarises the findings of a project to complete the conceptual design and economic optimization of a modular standardised crossflow hydro-turbine. Details are given of the work to date, the comparison of HydroPak cost with conventional micro- and mini-hydro power costs, and the economic advantages of taking the ''packaged'' and ''standardised approaches'' to the design process. The market for mini-hydro turbines is discussed.

  8. Scheduling of head-dependent cascaded hydro systems: Mixed-integer quadratic programming approach

    International Nuclear Information System (INIS)

    Catalao, J.P.S.; Pousinho, H.M.I.; Mendes, V.M.F.

    2010-01-01

    This paper is on the problem of short-term hydro scheduling, particularly concerning head-dependent cascaded hydro systems. We propose a novel mixed-integer quadratic programming approach, considering not only head-dependency, but also discontinuous operating regions and discharge ramping constraints. Thus, an enhanced short-term hydro scheduling is provided due to the more realistic modeling presented in this paper. Numerical results from two case studies, based on Portuguese cascaded hydro systems, illustrate the proficiency of the proposed approach.

  9. Small hydro in Africa

    CSIR Research Space (South Africa)

    Jonker Klunne, W

    2011-10-01

    Full Text Available hydro, the author has started an online database of small hydropower projects in eastern and southern Africa. The main aim of the database is to catalogue the current situation and to make that accessible to policymakers, project developers, as well...

  10. Vibration analysis of a hydro generator for different operating regimes

    Science.gov (United States)

    Haţiegan, C.; Pădureanu, I.; Jurcu, M.; Nedeloni, M. D.; Hamat, C. O.; Chioncel, C. P.; Trocaru, S.; Vasile, O.; Bădescu, O.; Micliuc, D.; (Filip Nedeloni, L.; Băra, A.; (Barboni Haţiegan, L.

    2017-01-01

    Based on experimental measurements, this paper presents the vibration analysis of a hydro generator that equips a Kaplan hydraulic turbine of a Hydropower plant in Romania. This analysis means vibrations measurement to different operating regimes of the hydro generator respectively before installing it and into operation, namely putting off load mode (unexcited and excited) respectively putting on load mode. By comparing, through the experimental results obtained before and after the operation of hydro aggregates are observed vibrations improvements.

  11. BLUE GOLD: HYDRO-ELECTRIC RENT IN CANADA

    OpenAIRE

    Glenn Jenkins; RICHARD ZUKER

    1984-01-01

    In this study, an attempt is made to develop estimates of the value of economic rent from production of hydro-electricity. These estimates are made for the year 1979, which is the latest period for which a comprehensive set of data was available at the time this work was undertaken. The estimates are developed for the hydro-electricity generated (or used) by electric utilities in four provinces: Quebec (including Churchill Falls), Ontario, Manitoba and British Columbia. These electric systems...

  12. More than energy: Ontario Hydro final annual report, January 1998 - March 1999

    International Nuclear Information System (INIS)

    1999-01-01

    Ontario Hydro ceased operations on March 31, 1999 and its assets and functions were transferred by provincial statute to two successor corporations: Ontario Power Generation Corp. (OPG) and Ontario Hydro Services Inc. Its functions were also transferred to the Independent Electricity Market Operator and the Electrical Safety Authority, two not-for-profit agencies. The original act defining Ontario Hydro was replaced by the Energy Competition Act, 1998. Until the demerger of the company on April 1, 1999, Ontario Hydro served 108 direct industrial clients, almost one million retail clients and 255 municipal utilities. Ontario Power Generation inherited Ontario Hydro's generating portfolio, making it one of the largest power producers in North America in terms of installed capacity. The OPG system includes 69 hydroelectric stations, three nuclear sites, and six operating fossil fueled stations. Total installed system capacity is approximately 31,000 megawatts, and Ontario Hydro's total sales in 1998 were almost 139 terawatt hours. Ontario Hydro Services Company is an energy services-based transmission and distribution company. It owns and maintains 29,000 km of transmission lines, 114,700 km of distribution lines, 245 km of high-voltage underground cable, 256 transformer stations, 928 distribution and regulation stations, and 250 microwave stations. It also retains the retail business held by Ontario Hydro, which serves over 950,000 clients, and the transmission and generating business for 23 remote communities in Northern Ontario

  13. Micro-hydro power: reviewing an old concept

    Energy Technology Data Exchange (ETDEWEB)

    Alward, R.; Eisenbart, S.; Volkman, J.

    1979-01-01

    This informaion package has been prepared to respond to an increasing number of requests for information on micro-hydro systems. It contains a resource directory, which is an attempt to put the reader in contact with the literature, plans, people, and companies appropriate to needs. On a world-wide basis, small-scale, environmentally benign, mechanical, and electrical hydropower systems are common. These are the systems for individual homes, farm, and shop use and generally have power outputs less than 100 kW. For convenience in terminology, this scale of hydro power is referred to as micro-hydro. A decision tree is first presented followed by information on determining the suitability of th site, equipment, economics, sources for financial assistance, regulatory conflicts, cautions and suggestions for the Do-It-Yourselfer, and the Self-Installer, manufacturers and suppliers, and sources of professional services. An annotated bibliography of 16 references is provided. (MCW)

  14. B.C. Hydro : 1997 annual report

    International Nuclear Information System (INIS)

    1997-01-01

    Operating and financial information from B.C. Hydro for 1997 is presented. B.C. Hydro is the third largest electric utility in Canada. The utility generates between 43,000 and 54,000 gigawatt-hours of electricity annually. More than 80 per cent of the electricity is produced by major hydroelectric generating stations on the Columbia and Peace rivers. This report presents a picture of improved financial performance, details of all revenues and expenditures and capsule summaries of the Utility's operations. The report also addresses issues regarding strategic direction, local and international competition, and consultation and regulatory activities. tabs. and figs

  15. Severe damage analysis of VVER 1000 following large break LOCA using Astec code

    International Nuclear Information System (INIS)

    Chatterjee, B.; Mukhopadhyay, D.; Lele, H.G.; Ghosh, A.K.; Kushwaha, H.S.

    2007-01-01

    Severe accident analysis of a reactor is an important aspect in the evaluation of source term. This in turn helps in emergency planning. An analysis has been carried out for VVER-1000 (V320) reactor following Large Break LOCA (loss of coolant accident) along with Station Blackout (SBO). Computer code ASTEC (jointly developed by IRSN, France, and GRS, Germany) is used for analyzing the transient. This integral code has been designed to be used as reference code for PSA2 studies. Severe accident analysis is carried out for an accident initiated by Large break LOCA along with SBO. Two cases have been analysed with the version ASTEC V1.2-rev1. In the first case hydro-accumulators are considered not available while the second case has been analysed with hydro accumulators. In this paper, ASTEC predictions have been studied for the in-vessel phase of the accident till vessel failure. The vessel failure was observed at 6979 s when accumulators were assumed not available. The vessel failure was quite delayed (19294 s) with operating accumulators. The hydrogen production was found to be very large (22% of total Zr inventory) in the case with accumulators compared to the case without accumulators (1.5% of total Zr inventory)

  16. Scheduling of head-dependent cascaded hydro systems: Mixed-integer quadratic programming approach

    Energy Technology Data Exchange (ETDEWEB)

    Catalao, J.P.S.; Pousinho, H.M.I. [Department of Electromechanical Engineering, University of Beira Interior, R. Fonte do Lameiro, 6201-001 Covilha (Portugal); Mendes, V.M.F. [Department of Electrical Engineering and Automation, Instituto Superior de Engenharia de Lisboa, R. Conselheiro Emidio Navarro, 1950-062 Lisbon (Portugal)

    2010-03-15

    This paper is on the problem of short-term hydro scheduling, particularly concerning head-dependent cascaded hydro systems. We propose a novel mixed-integer quadratic programming approach, considering not only head-dependency, but also discontinuous operating regions and discharge ramping constraints. Thus, an enhanced short-term hydro scheduling is provided due to the more realistic modeling presented in this paper. Numerical results from two case studies, based on Portuguese cascaded hydro systems, illustrate the proficiency of the proposed approach. (author)

  17. Fifteen years of radioactive waste management at Ontario Hydro

    International Nuclear Information System (INIS)

    Carter, T.J.; Rao, P.K.M.

    1985-01-01

    Ontario Hydro is a large Canadian utility producing 84% (7394 MWe) of the Nuclear Electricity generated in Canada. The low- and intermediate-level radioactive wastes generated by the Ontario Hydro program are currently being managed at the Bruce Nuclear Power Development with various volume reduction, packaging and interim storage systems. Ontario Hydro also owns and operates a radioactive waste transportation system. Studies are in progress for final disposal of these wastes in a suitable geology in Ontario. Since its inception in 1971, Ontario Hydro's radioactive waste management program has evolved into providing a full fledged radioactive waste management capability to the utility's two nuclear generation centres at Pickering and Bruce, and later in the decade, to Darlington. This paper summarizes the various developments in this program; highlights the major facilities both in-service and planned to be built; reviews the experiences gained over fifteen years of in-house waste management; and discusses the proposed reorientation towards ultimate disposal of these wastes. 2 refs., 8 figs., 1 tab

  18. Environmental-impact assessment of hydro-power in Egypt

    International Nuclear Information System (INIS)

    Rashad, S.M.; Ismail, M.A.

    2000-01-01

    The environmental impact of energy production and use with the associated emissions of greenhouse gases, particularly CO 2 , has created much attention and growing concern at both national and international levels. In Egypt, efforts have been directed to incorporate the environment-protection issues within the overall planning of the energy sector, as appropriate to its national commitment and its techno-economic considerations. Over the past decade, 1985-1995, hydro-power had contributed between 28 and 22% of the total energy produced by Egyptian power-plants, while the contribution of the hydro capacity was between 32.4 and 21.5%. Many studies have been carried out on the impacts of the Aswan High Dam on various aspects of the environment. An objective evaluation of the Dam, based on 25 years of operational data, indicated that it has overall been positive even though it has contributed to some environmental problems. These problems, however, are significantly less than most people originally expected. This paper deals with the review and analysis of the detrimental effects of hydro-power in Egypt. An evaluation will be given of the emissions of greenhouse gases from the whole hydro-chain. (Author)

  19. Hydro-Quebec proudly celebrates 50 years of service

    International Nuclear Information System (INIS)

    Anon.

    1994-01-01

    The history of the electric utility Hydro-Quebec is reviewed from its creation in 1944 as the Hydroelectric Commission of Quebec. The utility inherited an installed capacity of 696 MW and it first went about standardizing electricity supply conditions and establishing equal rates in the Montreal area. It began major construction projects in the mid-1950s with the Bersimis and Carillon hydroelectric plants. By 1962, installed capacity reached 3,657 MW. In 1963, Hydro-Quebec bought 10 private electricity distribution companies, 45 cooperatives, and a series of private or municipal systems. In 1965, the utility commissioned the world's first 735-kV transmission line. In 1967, Hydro-Quebec opened its research institute, and another laboratory specializing in electrotechnologies was opened in 1987. The 1970s were noted for the James Bay hydroelectric projects, the development of which was eventually governed by the landmark James Bay and Northern Quebec Agreement of 1975. Electricity exports greatly expanded in the 1970s and early 1980s as larger hydroelectric projects came on stream. Challenges of the 1990s include service quality, environmental issues, energy efficiency, and conservation. Hydro-Quebec's Energy Efficiency Project has a target of annual savings of 9.3 TWh by the year 2000. Energy efficiency and power system upgrading are priorities for serving future customer needs. Hydro-Quebec continues to promote hydroelectric power as the cheapest, most environmentally benign form of energy and future generating stations in progress include phase II of the LaGrande complex (to be completed 1996). 2 figs

  20. Marginal-cost pricing for Hydro-Quebec residential customers

    International Nuclear Information System (INIS)

    Paquin, C.

    1994-02-01

    An option available to governments and to utilities such as Hydro-Quebec for responding to objectives of energy efficiency is the adoption of marginal cost pricing. Compared to currently used price structures, marginal cost pricing will allow improvement of price signals and assure an optimal utilization of the resource. That type of pricing could be economically beneficial but may not be desirable from the point of view of revenue distribution. Taking account of Hydro-Quebec's cost structure, pure marginal cost pricing would generate an income that would be strongly contested on equity grounds. For example, it would raise prices 60% for residential customers. Faced with this possibility, an analysis is presented of the impact of a peak-offpeak pricing (or pure marginal cost pricing) on Hydro-Quebec's residential customer energy bills. The marginal costs of Hydro-Quebec are calculated by the method of Bernard and Chatel (1985) and analysis of the results is based on Friedman and Weare (1993). A sample of 28,417 residential customers from a 1989 Hydro-Quebec survey is used in the study. Two scenarios are analyzed; the first allowing comparison of the energy bill only on the basis of marginal costs and of average costs, and the second allowing comparison of the impact of marginal cost pricing on the total bill. In the first scenario, the impact translates into a 31% increase in energy bills for the entire customer class considered; in addition, this impact is inversely proportional to the revenue class. In the second scenario, the increase is 24%. 33 refs., 10 figs., 53 tabs

  1. PCB management at Manitoba Hydro's Waverley Service Centre

    International Nuclear Information System (INIS)

    Rempel, R.G.; Engstrom, T.

    1996-01-01

    Manitoba Hydro was the first Canadian utility to initiate a program to decontaminate insulating oil contaminated with polychlorinated biphenyls (PCBs). This paper describes Manitoba Hydro's recovery, reuse and recycling program, operated out of the utility's Waverley Service Centre (WSC). The WSC is a central facility serving to phase out and and destroy PCBs which remain in Manitoba Hydro's electrical system. Several hundred thousand litres of PCB-contaminated insulating oil are decontaminated annually at the WSC. The decontaminated oil is then reconditioned for reuse within the system operations. A PCBX unit was purchased from Sun Ohio for the decontamination of insulating oils containing PCBs. PCB decontamination is achieved through a chemical dechlorination treatment process. The PCBX treatment unit and the PCB storage building were described. 18 refs., 8 figs

  2. Higher profits, lower bills : a new electricity strategy for Hydro-Quebec

    International Nuclear Information System (INIS)

    2010-01-01

    Quebec is the fourth largest producer of hydro-electricity in the world, and has among the lowest electricity rates in North America. In 2008, 89 percent of the electricity produced by Hydro-Quebec was sold in the province, and the remainder was exported. In 2009, the electric utility released its strategic plan for 2009 to 2013. Hydro-Quebec's net profits are forecast to decline by 24 percent by 2013 and electricity rates are forecast to rise by 8.5 percent. Since Hydro-Quebec has already developed all of the province's low-cost hydroelectric resources, it can no longer increase profits and lower rates by building new hydropower production stations. In order to continue to prosper, the utility will invest in energy efficiency and better coordination of its power system with Ontario's. Increased electricity exports from Hydro-Quebec will help both Ontario and the United States reduce their greenhouse gas emissions by displacing fossil power generation. 25 refs., 2 tabs., 3 figs.

  3. ENVIRONMENTAL TECHNOLOGY VERIFICATION: JOINT (NSF-EPA) VERIFICATION STATEMENT AND REPORT HYDRO COMPLIANCE MANAGEMENT, INC. HYDRO-KLEEN FILTRATION SYSTEM, 03/07/WQPC-SWP, SEPTEMBER 2003

    Science.gov (United States)

    Verification testing of the Hydro-Kleen(TM) Filtration System, a catch-basin filter designed to reduce hydrocarbon, sediment, and metals contamination from surface water flows, was conducted at NSF International in Ann Arbor, Michigan. A Hydro-Kleen(TM) system was fitted into a ...

  4. How would the privatization of Hydro-Quebec make Quebecers richer?

    International Nuclear Information System (INIS)

    Garcia, C.

    2009-02-01

    In 1962, a total of 46 companies shared Quebec's electricity production, involving no less than 9,710 megawatts of power. The 4 companies that controlled 85 per cent of this power were Hydro-Quebec, Aluminum Company of Canada (Alcan), Shawinigan Water and Power Company and the Gatineau Power Company. At the time, electricity rates also varied considerably throughout Quebec, being extremely high in regions far from Montreal, which hindered potential industrial development in those areas. This report discussed the privatization of Hydro-Quebec and how it could make Quebecers richer. The report discussed the early days of electricity in Quebec and outlined the reasons that led Quebec to nationalize the production and distribution of electricity and to entrust its management to Hydro-Quebec. A summary of the developments undertaken to enable Hydro-Quebec to substantially boost its exports to the United States following liberalization of the American market toward the end of the twentieth century was also provided. A comparison group of companies in the United States involved in the production, transmission and distribution of electricity was also presented in order to analyze Hydro-Quebec's performance from various standpoints. Other topics that were addressed in the report included operational efficiency; use of capital; the experience of the United Kingdom; the rise in electricity rates; a strategy for privatization; the public offering; and protecting Quebec electricity consumers. The role of the Quebec government and of Hydro-Quebec were also examined. Electricity exports and electricity and aluminum smelters were also assessed. The report noted that Hydro-Quebec's annual profit would shrink from $2,882 million to $709 million if it had to pay the market price for the electricity it obtains from Churchill Falls. 23 tabs., 1 fig., 2 appendices

  5. Production method of hydrogen jet plasma process in hydro machinery

    International Nuclear Information System (INIS)

    Amini, F.

    2007-01-01

    The purpose of present paper is to the process of plasma formation in hydro machinery when a hydro turbine operates at various conditions and load rejection. By investigation the power, shock pressure , and impact effects of hydro machinery, it is revealed that energy and hydrogen are generated by the plasma process. The investigation on several turbines of various hydro power plants reveals that cold fusion process in hydro machinery generates hydrogen. The hypothesis concerning the participation of alkaline metals in river water and the atomic nuclei of the runner blade material in the formation of hydrogen are considered. It is possible to assume hydrogen, deuterium, helium, and tritium atoms (based on Dr. Mizuno and Dr. Kanarev theories) that are formed, diffuse into cavitation bubbles. The plasma is generated during the collapse of the bubble; thus, the quantity of burnt hydrogen determine the volume of generating hydrogen and the impact force caused by hydrogen explosion (noise).There are five main notions, which can determine hydrogen and plasma process: (1) turbine power effect, (2) high shock pressure, (3) crack on turbine parts, (4) impacts effects and (4) the lift of rotating parts. The frequency of the excitation lies in a range from 0.786 to 1.095 Hz.In future, it may be possible to design hydro turbines based on the plasma process that generates hydrogen; or there may exist turbines that rotate with a mixture of hydrogen explosion and water energies

  6. Rural hydro technology

    International Nuclear Information System (INIS)

    Fowlie, M.

    1999-01-01

    This paper examines the increasing use of micro hydroelectric schemes for power generation in mountainous communities in Asia to alleviate some of the pressures on forests. An example of such a scheme in Pakistan is given, and the installation and operation of small hydro units, socio-economic factors, and the impact of the projects on the position of women in the community are discussed. (UK)

  7. Navigating the hydro market in Latin America

    International Nuclear Information System (INIS)

    Yermoli, C.A.

    1995-01-01

    The governments of most Latin American countries have yet to establish clear policies about the future ownership of existing generation assets, but they do expect future capacity to be largely developed by the private sector. There were at one time plans for many government-financed hydro projects in the area, but these projects produced much paper and little electricity. Present trends will take the area toward independent power projects, both hydro projects and thermal power projects. This article is a review of those present trends

  8. The Grossmatt hydro-power station

    International Nuclear Information System (INIS)

    Hintermann, M.

    2006-01-01

    This final report for the Swiss Federal Office of Energy (SFOE) presents the project for a small hydropower station on the Birs river in north-western Switzerland. The report reviews the history of the project, in which a new 385 kW-hydro-power station at the site of an earlier installation is foreseen. Details are presented on the investigations made and on the co-ordination with the owners of the hydro-power station situated up-river, the local power utility and the local authorities. Also, the requirements placed on the project by the fishing authorities are quoted and the solution foreseen is described. Also discussed are the requirements placed on the project by legislation on environmental impact and flood protection. Figures on electrical energy production and building costs are presented

  9. Thai-Myanmar joint hydro schemes

    Energy Technology Data Exchange (ETDEWEB)

    Boonpiraks, S [Electricity Generating Authority of Thailand, Nonthaburi (Thailand)

    1992-10-01

    A brief overview is presented here of planned cooperation between Thailand and Myanmar to harness the hydro resources available along the border of the two countries. This would reduce their dependence on thermal generation. (author).

  10. Summary report of research on evaluation of coupled thermo-hydro-mechanical behavior in the engineered barrier

    International Nuclear Information System (INIS)

    Chijimatsu, Masakazu; Amemiya, Kiyoshi; Yamashita, Ryo

    2002-02-01

    After emplacement of the engineered barrier system (EBS), it is expected that the near-field environment will be impacted by phenomena such as heat dissipation by conduction and other heat transfer mechanisms, infiltration of groundwater from the surrounding rock in to the engineered barrier system, stress imposed by the overburden pressure and generation of swelling pressure in the buffer due to water infiltration. In order to recognize and evaluate these coupled thermo-hydro-mechanical (THM) phenomena, it is necessary to make a confidence of the mathematical models and computer codes. Evaluating these coupled THM phenomena is important in order to clarify the initial transient behavior of the EBS within the near field. DECOVALEX project is an international co-operative project for the DEvelopment of COupled models and their VALidation against EXperiments in nuclear waste isolation and it is significance to participate this project and to apply the code for the validation. Therefore, we tried to apply the developed numerical code against the subjects of DECOVALEX. In the above numerical code, swelling phenomenon is modeled as the function of water potential. However it dose no evaluate the experiment results enough. Then, we try to apply the new model. (author)

  11. BC Hydro's transmission business : transition to a competitive marketplace

    International Nuclear Information System (INIS)

    Threlkeld, R.J.

    1998-01-01

    Progress made by BC Hydro to facilitate the use of the transmission system for wholesale electricity transactions, including the separation of the system operation function from generation and merchant functions, was discussed. BC Hydro, Canada's third largest electric utility, was the first Canadian utility to offer open access to its transmission system for wholesale transactions. The utility has an installed generating capacity of about 10.8 gigawatts, 90 per cent of which is hydroelectric. The remainder is thermal, gas turbine and stationary and mobile diesel generation. The key element in establishing wholesale transmission transactions was the FERC-mandated open access same-time information system (OASIS) on which BC Hydro posts available transmission capacity, planned outages and pricing. The system operates on BC Hydro's internet node and interfaces to a Transmission Scheduling System (TSS). The TSS was developed in-house to handle the increased complexity of scheduling multiple energy and capacity transactions for users of the transmission system. Operation of the system and the challenge to constantly improve it were discussed

  12. Miksova hydro-electric power plant is awaiting the fortieths

    International Nuclear Information System (INIS)

    Regula, E.

    2004-01-01

    In this paper the history of cascade of the Miksova hydro-electric power plants (HEPP, in the Slovak Republic) is described. This cascade of power plants consists of the following hydro-electric power plant: Hricov HEPP, Miksova HEPP, Povazska Bystrica HEPP and Nosice HEPP. In the Miksova HEPP are installed three turbo-sets with Kaplan turbine from the CKD Blansko and with synchronous hydro-alternator. Synchronous hydroelectric alternators have maximal output by 31.2 MW. Their installed output is together 93.6 MW and projected production of electric energy is 207 GWh annually. To the end 2003 Miksova HEPP during 40 years has produced together 7,161,342 MWh of electric energy

  13. Neuro-fuzzy modelling of hydro unit efficiency

    International Nuclear Information System (INIS)

    Iliev, Atanas; Fushtikj, Vangel

    2003-01-01

    This paper presents neuro-fuzzy method for modeling of the hydro unit efficiency. The proposed method uses the characteristics of the fuzzy systems as universal function approximates, as well the abilities of the neural networks to adopt the parameters of the membership's functions and rules in the consequent part of the developed fuzzy system. Developed method is practically applied for modeling of the efficiency of unit which will be installed in the hydro power plant Kozjak. Comparison of the performance of the derived neuro-fuzzy method with several classical polynomials models is also performed. (Author)

  14. Natural resources: adjusting and innovating - Hydro-Quebec in the global age

    International Nuclear Information System (INIS)

    Ouellet, D.

    1995-01-01

    Although it is believed that the information economy is replacing the mass economy, many companies continue to grow on economies based on natural resources. Recent aggressive growth by Hydro-Quebec in the highly competitive market for energy products was singled out as one of the success stories. Among other things, Hydro-Quebec was reported to focus attention on the globalization of electricity products, particularly in Asia, Europe and Africa. The corporation was said to cooperate with other utilities companies such as Ontario Hydro and Power Asia Assets Corporation to diversify its markets abroad. Hydro-Quebec is also marketing new products, developed in its laboratories and by subsidiaries, such as power system simulators and power system planning and management systems, on a global scale

  15. 75 FR 45607 - Application To Export Electric Energy; Manitoba Hydro

    Science.gov (United States)

    2010-08-03

    ... DEPARTMENT OF ENERGY [OE Docket No. EA-281-B] Application To Export Electric Energy; Manitoba Hydro AGENCY: Office of Electricity Delivery and Energy Reliability, DOE. ACTION: Notice of application. SUMMARY: Manitoba Hydro (Manitoba) has applied to renew its authority to transmit electric energy from the...

  16. The hydro-mechanical modeling of the fractured media

    International Nuclear Information System (INIS)

    Kadiri, I.

    2002-10-01

    The hydro-mechanical modeling of the fractured media is quite complex. Simplifications are necessary for the modeling of such media, but, not always justified, Only permeable fractures are often considered. The rest of the network is approximated by an equivalent continuous medium. Even if we suppose that this approach is validated, the hydraulic and mechanical properties of the fractures and of the continuous medium are seldom known. Calibrations are necessary for the determination of these properties. Until now, one does not know very well the nature of measurements which must be carried out in order to carry on a modeling in discontinuous medium, nor elements of enough robust validation for this kind of modeling. For a better understanding of the hydro-mechanical phenomena in fractured media, two different sites have been selected for the work. The first is the site of Grimsel in Switzerland in which an underground laboratory is located at approximately 400 m of depth. The FEBEX experiment aims at the in-situ study of the consecutive phenomena due to the installation of a heat source representative of radioactive waste in the last 17 meters of the FEBEX tunnel in the laboratory of Grimsel. Only, the modeling of the hydro-mechanical of the excavation was model. The modeling of the Febex enabled us to establish a methodology of calibration of the hydraulic properties in the discontinuous media. However, this kind of study on such complex sites does not make possible to answer all the questions which arise on the hydro-mechanical behavior of the fractured media. We thus carried out modeling on an other site, smaller than the fist one and more accessible. The experimental site of Coaraze, in the Maritime Alps, is mainly constituted of limestone and fractures. Then the variation of water pressure along fractures is governed by the opening/closure sequence of a water gate. Normal displacement as well as the pore pressure along these fractures are recorded, and then

  17. Investigation research on the evaluation of a coupled thermo-hydro-mechanical-chemical phenomena. 4

    International Nuclear Information System (INIS)

    Ishihara, Yoshinao; Sagawa, Hiroshi; Matsuoka, Fushiki; Chijimatsu, Masakazu; Amemiya, Kiyoshi

    2005-02-01

    In order to realize a coupling analysis in the near field of the geological disposal system, the coupling analysis code 'COUPLYS (Coupling analysis system)' on the Thermo-Hydro-Mechanical-Chemical (THMC) phenomena by THAMES, Dtransu-3D·EL and PHREEQC, those are existing analysis code, is developed in this study. (1) We have introduced 8 nodes element for THAMES code in order to solve the coupled thermal, hydraulic and mechanical phenomena. Furthermore, in order to obtain the reliable resolution, each phenomenon is solved separately instead of full coupling. (2) In order to upgrade Dtransu-3D·EL model, we have introduced gas diffusion independent on aqueous element. (3) We have adopted surface site density for the bentonite depend on water content and CSH solid phase based on the ratio of C/S for cementitious material in the geochemistry module, and studied on the methodology of time mesh for kinetic model and separate method for pore water chemistry in the bentonite. (4) In order to develop THMC code, we have modified Multi p hreeqc to keep efficiency distributed processing for geochemical calculation and modified COUPLYS to calculate continuous treatment, and studied on the coupling module. After THAMES, Dtransu, PHREEQC and the hydraulic conductivity module were installed in COUPLYS, verification study was carried out to check basic function. (5) In order to ensure efficiency of analysis processor, we have developed supporting tool for graphic processor for THMC code and supporting tool of interpretation for geochemistry results. (author)

  18. Hydro-Quebec line crew returns home from Haiti

    Energy Technology Data Exchange (ETDEWEB)

    Horne, D.

    2005-04-01

    This article recounted the experience of a 14-member Hydro-Quebec line crew and support group that travelled to Haiti in November 2004 to help re-establish essential electricity services. The work was conducted together with Electricite d'Haiti (EDH). The team installed 400 poles, 10 km of conductors and 85 transformers, restoring service to water pumps; La Providence and Raboteau hospitals; a centre housing Doctors without borders; a CARE distribution centre; and several convents and schools. The installation of street lights at strategic points allowed lighting to be restored in several districts of Gonaives. Hydro-Quebec was able to extend their mission to Haiti and purchase more poles and transformers with the help of a $500,000 contribution from the Canadian International Development Agency. Hydro-Quebec was the only company who came to the aid of EDH. The total budget for the project was $4 million. 2 figs.

  19. Application of reliability methods in Ontario Hydro

    International Nuclear Information System (INIS)

    Jeppesen, R.; Ravishankar, T.J.

    1985-01-01

    Ontario Hydro have established a reliability program in support of its substantial nuclear program. Application of the reliability program to achieve both production and safety goals is described. The value of such a reliability program is evident in the record of Ontario Hydro's operating nuclear stations. The factors which have contributed to the success of the reliability program are identified as line management's commitment to reliability; selective and judicious application of reliability methods; establishing performance goals and monitoring the in-service performance; and collection, distribution, review and utilization of performance information to facilitate cost-effective achievement of goals and improvements. (orig.)

  20. Hydro-Quebec International : taking up the challenges of globalization

    Energy Technology Data Exchange (ETDEWEB)

    Carpentier, J.M.

    1997-12-31

    With the ever increasing demand for electricity, it is estimated that the world`s electrical generating capacity will grow by about 1,000,000 MW over the next eight years. This represents a 40 per cent increase over today`s capacity. Hydro-Quebec is determined to stake its place in international markets and to maximize the profits from the strong expertise gained during the construction of Quebec`s major electric facilities. The venture into international markets is primarily a commercial strategy. To that effect, Hydro-Quebec plans to invest up to $300 million in international projects around the world so that after five years it can have major interests and assets totaling $12 billion or more. China, North Africa and the Middle East are some of the market that Hydro-Quebec wishes to enter in the years ahead. The Eastern European and Southeast Asian markets are also worthy of interest. It was pointed out that Hydro-Quebec is not the only large electric utility turning to world market to pursue its growth. French, Spanish and American companies are also presently investing billions of dollars in the world market.

  1. Hydro-Quebec International : taking up the challenges of globalization

    International Nuclear Information System (INIS)

    Carpentier, J.M.

    1997-01-01

    With the ever increasing demand for electricity, it is estimated that the world''s electrical generating capacity will grow by about 1,000,000 MW over the next eight years. This represents a 40 per cent increase over today''s capacity. Hydro-Quebec is determined to stake its place in international markets and to maximize the profits from the strong expertise gained during the construction of Quebec''s major electric facilities. The venture into international markets is primarily a commercial strategy. To that effect, Hydro-Quebec plans to invest up to $300 million in international projects around the world so that after five years it can have major interests and assets totaling $12 billion or more. China, North Africa and the Middle East are some of the market that Hydro-Quebec wishes to enter in the years ahead. The Eastern European and Southeast Asian markets are also worthy of interest. It was pointed out that Hydro-Quebec is not the only large electric utility turning to world market to pursue its growth. French, Spanish and American companies are also presently investing billions of dollars in the world market

  2. HydroCoils, occlusion rates, and outcomes: a large single-center study.

    LENUS (Irish Health Repository)

    O'Hare, A M

    2010-11-01

    The HydroCoil is an expansile hydrogel coil designed to produce a greater degree of volumetric packing within cerebral aneurysms when compared with bare platinum coils. This increased packing is, in turn, believed to decrease the risk of recurrence within aneurysms and hence the risk of their rupture in the long term. The aim of this work was to assess whether the use of HydroCoils and the proportion of HydroCoil used have any influence on the subsequent occlusion and recurrence rates of treated aneurysms.

  3. Hybrid Micro-Hydro Power Generation Development in Endau Rompin National Park Johor, Malaysia

    Directory of Open Access Journals (Sweden)

    Yusop Azli

    2017-01-01

    Full Text Available Micro-Hydro electrical power systems are very useful for remote area electrification which does not had supply from the national grid. On the contrary, this area has river streams with high potential for micro-hydro power generation. As such, the UTHM ECO-Hydro Team embarked on a project for erecting a micro-hydro power plant with collaboration with National Education Research Center (NERC, Johor National Park Corporation in Endau Rompin. The existing power generation in this area at present is by using diesel generator gives negative impact on finance and environment in the long run. It supplies power to several including library, offices, open laboratory, chalets and dorms.. At the moment, the micro-hydro system complements the diesel generator, thus becoming a hybrid power generation system.

  4. Pico hydro turbines for electricity in rural areas

    OpenAIRE

    Descotte, Gérard

    2016-01-01

    This article discusses the feedback and lessons learned, particularly from a survey carried out following the deployment program of a pico hydro power solution in a very isolated rural area in north Laos. This project is part of the strategic development for the rural electrification of Laos, in which pico hydro power facilities constitute the main avenue of progress for the electrification of isolated villages.

  5. Coupled thermo-hydro-mechanical experiment at Kamaishi mine. Technical note 15-99-02. Experimental results

    Energy Technology Data Exchange (ETDEWEB)

    Chijimatsu, Masakazu; Sugita, Yutaka; Fujita, Tomoo [Tokai Works, Waste Management and Fuel Cycle Research Center, Waste Isolation Research Division, Barrier Performance Group, Japan Nuclear Cycle Development Inst., Tokai, Ibaraki (Japan); Amemiya, Kiyoshi [Hazama Corp., Tokyo (Japan)

    1999-07-01

    It is an important part of the near field performance assessment of nuclear waste disposal to evaluate coupled thermo-hydro-mechanical (T-H-M) phenomena, e.g., thermal effects on groundwater flow through rock matrix and water seepage into the buffer material, the generation of swelling pressure of the buffer material, and thermal stresses potentially affecting porosity and fracture apertures of the rock. An in-situ T-H-M experiment named Engineered Barrier Experiment' has been conducted at the Kamaishi Mine, of which host rock is granodiorite, in order to establish conceptual models of the coupled T-H-M processes and to build confidence in mathematical and computer codes. In 1995, fourteen boreholes were excavated in order to install the various sensors. After the hydraulic tests, mechanical tests were carried out to obtain the rock properties. After that, a test pit, 1.7 m in diameter and 5.0 m in depth, was excavated. During the excavation, the change of pore pressure, displacement and temperature of rock mass were measured. In 1996, the buffer material and heater were set up in the test pit, and then coupled thermo-hydro-mechanical test was started. The duration of heating phase was 250 days and that of cooling phase was 180 days. The heater surface was controlled to be 100degC during heating phase. Measurement was carried out by a number of sensors installed in both buffer and rock mass during the test. The field experiment leads to a better understanding of the behavior of the coupled thermo-hydro-mechanical phenomena in the near field. (author)

  6. Small hydro plant- present scenario and future prospects

    International Nuclear Information System (INIS)

    Purohit, D.P.

    1996-01-01

    The article, deals with the methodology of power generation by small hydro power resources, especially in the Himalayan and sub Himalayan regions and the benefits it will bestow to the inhabitants of this region. The development of small hydro power projects in the Himalayas and sub Himalayas would serve as a model for environment- friendly sources of energy to benefit small communities world wide. The use of water turbine generators for the generation of cheaper power is also discussed. 4 refs

  7. The Nothuesli small hydro project

    International Nuclear Information System (INIS)

    Balachandran, S.; Jorde, K.

    2008-01-01

    This report for the Swiss Federal Office of Energy (SFOE) discusses the project for a small 16-kilowatt hydro plant on the Gonzenbaechli stream in eastern Switzerland. The site, which was used even before 1860 for obtaining power from the stream is briefly described, as are the present remains of earlier installations. An old Francis turbine has been retrieved and could possibly be reused. Water-flow figures and fall-heights are noted. Design flows and residual water quantities required by legislation are noted and discussed, as are the geology and topology of the catchment area. The proposals for a new hydro-power plant are described, including the apparatus proposed with a power of 20 kVA. Environmental aspects are also discussed, as are the investment costs and the economic viability of the project. The paper is completed with a comprehensive appendix, including detailed cost estimates.

  8. Impact on the aquatic environment of hydro-peaking in hydroelectric plants

    International Nuclear Information System (INIS)

    Sabaton, C.; Lauters, F.; Valentin, S.

    1996-01-01

    There are a number of types of hydroelectric installations on French rivers. Some of these intermittently turbine water stored in dammed reservoirs, in order to use available reserves at the most opportune moment for power generation. These plants, run under 'hydro-peaking' management procedures, cause variations in discharge in river sections downstream of the restitution, on a daily or weekly scale. To answer questions concerning the impact of such variations in discharge on the aquatic environment, EDF launched a research program aimed at describing and better understanding the physical and biological phenomena related to hydro-peaking and assessing the possible impact of this type of plant management on French streams. Seven sites subjects to hydro-peaking were studied on rivers with mean flow rates lower than 20 m 3 /s (which corresponds to over 65 % of EDF hydro-peaking sites). Four themes in particular were examined: hydraulic characterization of hydro-peaking, modifications in thermal regime and water quality, response of benthic invertebrates and response of fish populations to hydro-peaking. For fish as well as for invertebrates, the role of the base discharge - in the absence of peaking flow - and that of the morphology of the river bed (and, in particular, the presence of shelter for fish) during periods of strong discharge were clearly highlighted. Impact assessment requires a precise diagnosis of the state of biocenoses. To carry out such a diagnosis, one must reason in terms of species, life phase (particularly the most sensitive phases) and population structure as well as the type of stream and the faunizone involved. A risk assessment is possible by means of simultaneous study of the morphology of the river bed and the response of the signal generated by hydro-peaking in terms of hydrology and physical characteristics downstream of the restitution. (authors)

  9. Hydro adventurers

    International Nuclear Information System (INIS)

    Wood, Janet

    2000-01-01

    Some of the changes brought about by privatisation of the hydroelectric power industry in Ecuador are discussed. At present, about 25% of the population has no electricity supply; in the remaining areas demand is increasing. Seven new facilities are presently under discussion and these are described briefly. A plant at Abitugua is to be developed as a 'merchant plant' and the meaning and implications of this are described in detail. The present financing programme for Abituaga and an alternative financing programme are detailed. By 2010, some 40% of Ecuador's electricity is expected to come from hydro

  10. Cost-benefit analysis of Hydro-Quebec's energy conservation programs

    International Nuclear Information System (INIS)

    Arsenault, E.

    1993-09-01

    A cost-benefit analysis is presented of the energy conservation programs of Hydro-Quebec for 1991 to 2010. Three possible scenarios are simulated. In the first scenario, Hydro-Quebec data are used without modification. In the second, the simulation is carried out in the absence of the Hydro-Quebec programs, and in the third, it is assumed that any economies achieved are only for the short term. A comparison between these simulations allows determination of results concerning the advantages and the costs which the programs introduce for the three groups comprising society: the consumer, the producer, and the government. The results of these comparisons show that the consumer, the producer, and the whole society gain benefits from the energy conservation programs, while the government loses. 13 refs., 13 figs., 14 tabs

  11. Mission: Partnerships - A Socially Responsible Approach for New Hydro-electric Developments

    Energy Technology Data Exchange (ETDEWEB)

    Wojczynski, Ed; Cole, Victoria; Pachal, Shawna; Goulet, Richard

    2010-09-15

    Worldwide there is a desire for clean, secure and renewable energy developed in an environmentally and socially responsible manner. In the Canadian province of Manitoba, where water is an abundant resource, efforts are being undertaken by Manitoba Hydro to achieve this goal through the development of new hydro-electric generating stations in partnership with Aboriginal (indigenous) communities. This paper focuses on the lessons learned by Manitoba Hydro in developing and implementing partnership agreements with northern Aboriginal communities on two new generation projects - the Wuskwatim Generation Project and the Keeyask Generation Project.

  12. The hydro energy; Energie hydraulique

    Energy Technology Data Exchange (ETDEWEB)

    Vachey, C.

    2000-05-01

    This paper is a first approach of the hydro energy energy. It presents the principle and the applications of this energy source. It proposes recommendations on the sizing and the cost estimation of an installation and the environmental impacts of this energy. (A.L.B.)

  13. Possibilities for Automatic Control of Hydro-Mechanical Transmission and Birotating Electric Machine

    Directory of Open Access Journals (Sweden)

    V. V. Mikhailov

    2014-01-01

    Full Text Available The paper presents mathematical models and results of virtual investigations pertaining to the selected motion parameters of a mobile machine equipped with hydro mechanical and modernized transmissions. The machine has been tested in similar technological cycles and it has been equipped with a universal automatic control system. Changes in structure and type of power transmission have been obtained with the help of a control algorithm including an extra reversible electric machine which is switched in at some operational modes.Implementation of the proposed  concept makes it possible to obtain and check the improved C-code of the control system and enhance operational parameters of the transmission and machine efficiency, reduce slippage and tire wear while using braking energy for its later beneficial use which is usually considered as a consumable element.

  14. Thermo-hydro-mechanical behaviour of Boom clay; Comportement thermo-hydro-mecanique de l'argile de Boom

    Energy Technology Data Exchange (ETDEWEB)

    Le, T.T

    2008-01-15

    This thesis studied the thermo-hydro-mechanical properties of Boom clay, which was chosen to be the host material for the radioactive waste disposal in Mol, Belgium. Firstly, the research was concentrated on the soil water retention properties and the hydro-mechanical coupling by carrying out axial compression tests with suction monitoring. The results obtained permitted elaborating a rational experimental procedure for triaxial tests. Secondly, the systems for high pressure triaxial test at controlled temperature were developed to carry out compression, heating, and shearing tests at different temperatures. The obtained results showed clear visco-elasto-plastic behaviour of the soil. This behaviour was modelled by extending the thermo-elasto-plastic model of Cui et al. (2000) to creep effect. (author)

  15. Assessment of the SPACE Code Using the ATLAS SLB-GB-01 Test

    International Nuclear Information System (INIS)

    Kim, Yo Han; Yang, Chang Keun; Kim, Seyun

    2013-01-01

    The Korea Nuclear Hydro and Nuclear Power Co. (KHNP) has developed a safety analysis code, called the Safety and Performance Analysis Code for Nuclear Power Plants (SPACE) by collaborative works with other Korean nuclear industries. The SPACE is a general-purpose best-estimated two-phase three-field thermal-hydraulic analysis code to analyze the safety and performance of pressurized water reactors (PWRs). The SPACE code has sufficient functions and capabilities to replace outdated vendor supplied codes and to be used for the safety analysis of operating PWRs and the design of advanced reactors. As a result of the second phase of the SPACE code development project, the 2.14 version of the code was released through the successive various V and V works using integral loop test data or plant operating data. In this study, the ATLAS main steam-line break (MSLB) test, SLB-GB-01, was simulated as a V and V work. The results were compared with the measured data. The ATALS MSLB test, SLB-GB-01, was simulated using the SPACE code. The results were compared with experimental data. Through the simulation, it was concluded that the SPACE code can effectively simulate MSLB accidents

  16. Towards A Grid Infrastructure For Hydro-Meteorological Research

    Directory of Open Access Journals (Sweden)

    Michael Schiffers

    2011-01-01

    Full Text Available The Distributed Research Infrastructure for Hydro-Meteorological Study (DRIHMS is a coordinatedaction co-funded by the European Commission. DRIHMS analyzes the main issuesthat arise when designing and setting up a pan-European Grid-based e-Infrastructure for researchactivities in the hydrologic and meteorological fields. The main outcome of the projectis represented first by a set of Grid usage patterns to support innovative hydro-meteorologicalresearch activities, and second by the implications that such patterns define for a dedicatedGrid infrastructure and the respective Grid architecture.

  17. New directions in nuclear waste disposal in Ontario Hydro

    International Nuclear Information System (INIS)

    Nash, K.

    1996-01-01

    Ontario Hydro Nuclear has financial, environmental, safety and public acceptance business objectives which must be met to achieve long term sustainable success. Short term objectives of achieving nuclear excellence in safety, cost and production are vital to this success. Ontario Hydro's nuclear waste and decommissioning liabilities must be managed within these objectives. This paper outlines the financial environmental and societal considerations and responsibility framework for managing these liabilities. (author)

  18. Proposed Hydro-Quebec development plan, 1993: Proposal

    International Nuclear Information System (INIS)

    1992-01-01

    The Quebec government now requires Hydro-Quebec to submit a development plan every three years instead of annually, in order to permit more in-depth studies and a broader consultation with interested parties. In the first of such three-year plans, a series of plan proposals is presented which was developed after a year of consultation with various groups on four fundamental matters: energy efficiency, means of generation, electro-intensive industries, and electricity exports. Options for meeting future demand at Hydro-Quebec are assessed, including the construction of new generation and transmission facilities, rehabilitation of existing facilities, improving electrical energy efficiency, and conservation strategies. These options are considered while applying the principle of sustainable development that respects the environment. Hydroelectricity will continue to be emphasized as the main source of generation since hydroelectric facilities offer distinct advantages in terms of costs, environmental impacts, and economic spinoffs. The proposed plan also presents objectives and strategies for improving the quality of service and internal operations. Financial forecasts for Hydro-Quebec are proposed which take into account the forecast changes in the utility's cost and revenue factors and its self-financing requirements. 5 figs., 15 tabs

  19. STEADY-SHIP: a computer code for three-dimensional nuclear and thermal-hydraulic analyses of marine reactors

    International Nuclear Information System (INIS)

    Itagaki, Masafumi; Naito, Yoshitaka; Tokuno, Yukio; Matsui, Yasushi.

    1988-01-01

    A code STEADY-SHIP has been developed to calculate three-dimensional distributions of neutron flux, power and coolant temperature in the reactor core of the nuclear ship MUTSU. The code consists of two parts, that is, a few-group three-dimensional neutron diffusion module DIFFUSION-SHIP and a thermal-hydraulic module HYDRO-SHIP: In the DIFFUSION-SHIP the leakage iteration method is used for solving the three-dimensional neutron diffusion equation with small computer core memory and short computing time; The HYDRO-SHIP performs the general thermal-hydraulic calculation for evaluating feedbacks required in the neutronic calculation by the DIFFUSION-SHIP. The macroscopic nuclear constants are generated by a module CROSS-SHIP as functions of xenon poison, fuel temperature, moderator temperature and moderator density. A module LOCAL-FINE has the capability of computing a detailed rod power distribution for each local node in the core, using the boundary conditions on the surface of the node which were supplied by the STEADY-SHIP whole-core calculation. The applicability of this code to marine reactors has been demonstrated by comparing the computed results with the data measured during the MUTSU land-loaded core critical experiments and with the data obtained during the hot-zero-power tests performed for the actual MUTSU plant. (author)

  20. Ontario Hydro annual report 1986

    International Nuclear Information System (INIS)

    1987-04-01

    Ontario Hydro's annual report of the financial position and activities for the year 1986 consists of their financial highlights; corporate profile; customer service and satisfaction; message from Chairman; message from President; 1986 in review; financial section; management report; five-year summary of financial statistics; and comparative statistics

  1. Economically viable and environment-friendly hydro energy in Estonia

    International Nuclear Information System (INIS)

    Saks, Ants; Velner, Harald

    2001-01-01

    Hydro energy has been in oblivion in Estonia for about 30 years now. During the 1960s, most of Estonia's small hydropower plants were closed down, just as it was done in the whole Soviet Union. As the only larger hydro plant, the 125 MW plant in Narva, was situated on the Russian side of the Narva River, there were only two or three small hydro plants left. Even those were exploited at low capacity and mainly for heating the buildings. It was not until the 1990s that a number of enthusiasts started to re-establish the hydro plants by reconstructing old installations. The pre-feasibility study 'Hydropower in Estonia' proposed by Estonian and Swedish experts, showed that the restoration of the hydropower plants and watermills is economically feasible and technically possible if advanced technology is used. Hydropower as an alternative ('green') energy source should be used in the best technical-economical way. The first pilot plant in Estonia, the 200 kW Kamari plant was constructed in 1998 with compact-propeller units, in co-operation with Waterpumps WP Oy and ABB. Today, ten new plants have been constructed or are under construction. Hydropower plants/watermills should be reconstructed in accordance with the legislative acts on environment protection

  2. Thermo-hydro-mechanical modelling of buffer, synthesis report

    International Nuclear Information System (INIS)

    Toprak, E.; Mokni, N.; Olivella, S.; Pintado, X.

    2013-08-01

    This study addresses analyses of coupled thermo-hydro-mechanical (THM) processes in a scheme considered for the spent nuclear fuel repository in Olkiluoto (Finland). The finite element code CODE B RIGHT is used to perform modelling calculations. The objective of the THM modelling was to study some fundamental design parameters. The time required to reach full saturation, the maximum temperature reached in the canister, the deformations in the buffer-backfill interface, the stress-deformation balance between the buffer and the backfill, the swelling pressure developed and the homogenization process development are critical variables. Because of the complexity of the THM processes developed, only a single deposition hole has been modelled with realistic boundary conditions which take into account the entire repository. A thermal calculation has been performed to adopt appropriate boundary conditions for a reduced domain. The modelling has been done under axisymmetric conditions. As a material model for the buffer bentonite and backfill soil, the Barcelona Basic Model (BBM) has been used. Simulation of laboratory tests conducted at B and Tech under supervision of Posiva has been carried out in order to determine the fundamental mechanical parameters for modelling the behaviour of MX-80 bentonite using the BBM model. The modelling process of the buffer-backfill interface is an essential part of tunnel backfill design. The calculations will aim to determine deformations in this intersection, the behaviour of which is important for the buffer swelling. The homogenization process is a key issue as well. Porosity evolution during the saturation process is evaluated in order to check if the final saturated density accomplishes the homogenization requirements. This report also describes the effect of the existence of an air-filled gap located between the canister and the bentonite block rings in thermo-hydro-mechanical behaviour of the future spent nuclear fuel repository in

  3. Thermo-hydro-mechanical modelling of buffer, synthesis report

    Energy Technology Data Exchange (ETDEWEB)

    Toprak, E.; Mokni, N.; Olivella, S. [Universitat Politecnica de Catalunya, Barcelona (Spain); Pintado, X. [B and Tech Oy, Helsinki (Finland)

    2013-08-15

    This study addresses analyses of coupled thermo-hydro-mechanical (THM) processes in a scheme considered for the spent nuclear fuel repository in Olkiluoto (Finland). The finite element code CODE{sub B}RIGHT is used to perform modelling calculations. The objective of the THM modelling was to study some fundamental design parameters. The time required to reach full saturation, the maximum temperature reached in the canister, the deformations in the buffer-backfill interface, the stress-deformation balance between the buffer and the backfill, the swelling pressure developed and the homogenization process development are critical variables. Because of the complexity of the THM processes developed, only a single deposition hole has been modelled with realistic boundary conditions which take into account the entire repository. A thermal calculation has been performed to adopt appropriate boundary conditions for a reduced domain. The modelling has been done under axisymmetric conditions. As a material model for the buffer bentonite and backfill soil, the Barcelona Basic Model (BBM) has been used. Simulation of laboratory tests conducted at B and Tech under supervision of Posiva has been carried out in order to determine the fundamental mechanical parameters for modelling the behaviour of MX-80 bentonite using the BBM model. The modelling process of the buffer-backfill interface is an essential part of tunnel backfill design. The calculations will aim to determine deformations in this intersection, the behaviour of which is important for the buffer swelling. The homogenization process is a key issue as well. Porosity evolution during the saturation process is evaluated in order to check if the final saturated density accomplishes the homogenization requirements. This report also describes the effect of the existence of an air-filled gap located between the canister and the bentonite block rings in thermo-hydro-mechanical behaviour of the future spent nuclear fuel

  4. Environmental impact and benefit from hydro-energy: Bulgarian case

    International Nuclear Information System (INIS)

    Vesselinov, V.; Iotova, A.

    1996-01-01

    The present hydro energy system in Bulgaria has been constructed mainly in the period 1950-1965. The currently utilized hydro-power potential, only 33% of the estimated technical potential, includes 87 HPP operating in 1991. A complex assessment of the environmental impact of the hydro energy objects as well as a comparative analysis of all energy sources in Bulgaria is made in the framework of Bulgarian Case Study of the DECADES Inter-Agency Project. The main types of environmental impact related to HPP operation are presented in 7 specific categories: land requirements, changes in the landscape, hydrological changes, micro-climatic changes, geodynamic changes, risk from man-made activities; generation of new ecosystems. A technique of expertise in ball is proposed as a suitable quantitative approach for more precise assessment of impact on climate factors from different energy sources. 2 tabs., 5 refs

  5. The hydro digest

    Energy Technology Data Exchange (ETDEWEB)

    Scheil, Hermann [Itaipu Mondig, Power Generation Group (KWU), Siemens AG, Erlangen (Germany)

    2000-12-01

    Digest WK is an analysis and diagnostics system for turbine generators in large hydroelectric plant: it was developed from the Digest system which has been used in steam turbine plants for many years. The system is in use at the world's biggest hydro plant in Itaipu Binacional between Paraguay and Brazil. The system is described under the sub-headings of (a) monitoring concept; (b) the Digest WK system; (c) vibration monitoring; (d) generator temperature analysis and (e) outlook.

  6. Vaksvikelva small hydro

    OpenAIRE

    Loe, Daniel Aarset

    2017-01-01

    Norway is in constant need of renewable energy, and hydroelectric power is still the main source. A great future potential can be found in countless small rivers scattered across the country, which could be developed through small hydro projects. In the process of converting mechanical movement - flowing water - into electric energy, about 5% turns into heat. From a power plant with an annual production of 15 GWh, this means energy enough to heat approximately 30 households is lost. In my pro...

  7. Hydro Ottawa achieves Smart Meter milestone

    International Nuclear Information System (INIS)

    Anon.

    2008-01-01

    As Ontario's second largest municipal electricity company, Hydro Ottawa serves more than 285,000 residential and business customers in the city of Ottawa and the village of Casselman. Since 2006, the utility has installed more than 230,000 Smart Meters throughout its service territory in an effort to provide better services to its customers. This initiative represents the largest operational advanced metering infrastructure network in Canada. This move was necessary before time-of-use rates can be implemented in Ottawa. The Smart Meters deliver data wirelessly to Hydro Ottawa's Customer Information System for billing and eliminating manual readings. The Smart Meters are designed to promote more efficient use of electricity. The Government of Ontario has passed legislation requiring the installation of Smart Meters throughout the province by the end of 2010

  8. Role of Pumped Storage Hydro Resources in Electricity Markets and System Operation: Preprint

    Energy Technology Data Exchange (ETDEWEB)

    Ela, E.; Kirby, B.; Botterud, A.; Milostan, C.; Krad, I.; Koritarov, V.

    2013-05-01

    The most common form of utility- sized energy storage system is the pumped storage hydro system. Originally, these types of storage systems were economically viable simply because they displace more expensive generating units. However, over time, as those expensive units became more efficient and costs declined, pumped hydro storage units no longer have the operational edge. As a result, in the current electricity market environment, pumped storage hydro plants are struggling. To offset this phenomenon, certain market modifications should be addressed. This paper will introduce some of the challenges faced by pumped storage hydro plants in today's markets and purpose some solutions to those problems.

  9. Coupled Large Scale Hydro-mechanical Modelling for cap-rock Failure Risk Assessment of CO2 Storage in Deep Saline Aquifers

    International Nuclear Information System (INIS)

    Rohmer, J.; Seyedi, D.M.

    2010-01-01

    This work presents a numerical strategy of large scale hydro-mechanical simulations to assess the risk of damage in cap-rock formations during a CO 2 injection process. The proposed methodology is based on the development of a sequential coupling between a multiphase fluid flow (TOUGH2) and a hydro-mechanical calculation code (Code-Aster) that enables us to perform coupled hydro-mechanical simulation at a regional scale. The likelihood of different cap-rock damage mechanisms can then be evaluated based on the results of the coupled simulations. A scenario based approach is proposed to take into account the effect of the uncertainty of model parameters on damage likelihood. The developed methodology is applied for the cap-rock failure analysis of deep aquifer of the Dogger formation in the context of the Paris basin multilayered geological system as a demonstration example. The simulation is carried out at a regional scale (100 km) considering an industrial mass injection rate of CO 2 of 10 Mt/y. The assessment of the stress state after 10 years of injection is conducted through the developed sequential coupling. Two failure mechanisms have been taken into account, namely the tensile fracturing and the shear slip reactivation of pre-existing fractures. To deal with the large uncertainties due to sparse data on the layer formations, a scenario based strategy is undertaken. It consists in defining a first reference modelling scenario considering the mean values of the hydro-mechanical properties for each layer. A sensitivity analysis is then carried out and shows the importance of both the initial stress state and the reservoir hydraulic properties on the cap-rock failure tendency. On this basis, a second scenario denoted 'critical' is defined so that the most influential model parameters are taken in their worst configuration. None of these failure criteria is activated for the considered conditions. At a phenomenological level, this study points out three key

  10. Electrodeposition to construct free-standing chitosan/layered double hydroxides hydro-membrane for electrically triggered protein release.

    Science.gov (United States)

    Zhao, Pengkun; Zhao, Yanan; Xiao, Ling; Deng, Hongbing; Du, Yumin; Chen, Yun; Shi, Xiaowen

    2017-10-01

    In this study, we report the electrodeposition of a chitosan/layered double hydroxides (LDHs) hydro-membrane for protein release triggered by an electrical signal. The electrodeposition was performed in a chitosan and insulin loaded LDHs suspension in the absence of salt. A free-standing chitosan/LDHs hydro-membrane was generated on the electrode with improved mechanical properties, which is dramatically different from the weak hydrogel deposited in the presence of salt. The amount of LDHs in the hydro-membrane affects the optical transmittance and multilayered structure of the hybrid membrane. Compared to the weak chitosan/LDHs hydrogel, the hydro-membrane has a higher insulin loading capacity and the release of insulin is relatively slow. By biasing electrical potentials to the hydro-membrane, the release behavior of insulin can be adjusted accordingly. In addition, the chitosan/LDHs hydro-membrane showed no toxicity to cells. Our results provide a facile method to construct a chitosan/LDHs hybrid multilayered hydro-membrane and suggest the great potential of the hydro-membrane in controlled protein release. Copyright © 2017 Elsevier B.V. All rights reserved.

  11. Development of fast ignition integrated interconnecting code (FI3) for fast ignition scheme

    International Nuclear Information System (INIS)

    Nagatomo, H.; Johzaki, T.; Mima, K.; Sunahara, A.; Nishihara, K.; Izawa, Y.; Sakagami, H.; Nakao, Y.; Yokota, T.; Taguchi, T.

    2005-01-01

    The numerical simulation plays an important role in estimating the feasibility and performance of the fast ignition. There are two key issues in numerical analysis for the fast ignition. One is the controlling the implosion dynamics to form a high density core plasma in non-spherical implosion, and the other is heating core plasma efficiency by the short pulse high intense laser. From initial laser irradiation to final fusion burning, all the physics are coupling strongly in any phase, and they must be solved consistently in computational simulation. However, in general, it is impossible to simulate laser plasma interaction and radiation hydrodynamics in a single computational code, without any numerical dissipation, special assumption or conditional treatment. Recently, we have developed 'Fast Ignition Integrated Interconnecting code' (FI 3 ) which consists of collective Particle-in-Cell code, Relativistic Fokker-Planck hydro code, and 2-dimensional radiation hydrodynamics code. And those codes are connecting with each other in data-flow bases. In this paper, we will present detail feature of the FI 3 code, and numerical results of whole process of fast ignition. (author)

  12. A study on the hydrotreating of coal hydro liquefaction residue and its kinetics

    Energy Technology Data Exchange (ETDEWEB)

    Huang, J.; Lu, X.; Zhang, D.; Gao, J. [Department of Chemical Engineering for Energy Resources, East China University of Science and Technology, Shanghai (China)

    2010-09-15

    Hydro-conversion of coal hydro liquefaction residue obtained from a 6 t/day pilot plant of Shenhua Group in Shanghai was carried out under the hydrotreating condition. The coal hydro liquefaction residue and its product were extracted in sequence with n-hexane, toluene and tetrahydrofuran in a Soxhlet apparatus. The n-hexane soluble fractions increased with the increase of reaction temperature and time. Its amount increased from 14.14% to a maximum of 40.86% under the conditions of 470 {sup o}C and 30 min, which meant that moderate extension of coal residence time in the coal hydro liquefaction reactor is beneficial to the increase of oil yield. A 4-lumped kinetic model of coal hydro liquefaction residue hydro-conversion was performed using solubility-based lumped fractions. In the model, the tetrahydrofuran insoluble fractions were classified into two parts: easily reactive part and unreactive part. The kinetic parameters were estimated by a fourth-order Runge-Kutta method and a nonlinear least squares method, and the apparent activation energies were calculated according to the Arrhenius Equation. A large quantity of total catalyst consisting of remained liquefaction catalyst, part of the mineral from raw coal and additive Fe-based catalyst could considerably reduce the apparent activation energy of hydro-conversion for the toluene insoluble/tetrahydrofuran insoluble fractions to 36.79 kJ-mol{sup -1}. The calculated values of the model coincided well with the experimental values. (authors)

  13. Stochastic dynamic programming optimization of BC Hydro's system under market and hydrologic uncertainties

    International Nuclear Information System (INIS)

    Druce, D.

    2004-01-01

    BC Hydro's installed generation capacity as of March 31, 2003 was 11,103 MW, of which 90 per cent was hydro power, 9 per cent was gas-fired and 1 per cent was non-integrated. The hydroelectric plants belong to one of three groups, the Peace River, Columbia River or small hydro which includes small to moderate sized-plants. Small hydro is controlled by hydrologic regime and storage limitations rather than by system requirements. The installed capacity for the 4 plants on the Columbia River totals 4,722 MW. The installed capacity at the 2 plants on the Peace River totals 3,424 MW. Both watersheds are subject to interior climate conditions with significant inflows from snowmelt and rainfall runoff. This presentation addressed the issue of mid-term hydro scheduling and its impact on markets. For the past 15 years, BC Hydro has used the marginal cost model for electricity trade and for operations planning. The model considers system loads and resources, and maximizes the expected net revenue over a planning horizon of 6 years. A marginal value of water stored in the Williston Reservoir has been established using the marginal cost model. The affect of weather, natural gas prices and water supply on hydro generation was also discussed. It was noted that information on spot market electricity prices has significantly improved since the electric power industry was deregulated in 1996. tabs., figs

  14. Hydro power plants, an overview of the current types and technology

    Directory of Open Access Journals (Sweden)

    Tkáč Štefan

    2018-03-01

    Full Text Available Despite the long history of hydropower technology and rising number of system harvesting energy from alternative sources, the constant research within hydro power sector becoming increasingly important as the power from water was and still is the leading alternative source of green energy generation, capitalized not necessarily within micro-urban structures only. The advantages of hydro systems involve their relatively low acquisition cost against durability, the possibility of gaining energy independence, relatively high flexibility and adaptability for spatial conditions and energy demands of the end users. Nowadays micro hydro systems could capitalize head range starting at 100cm and the efficiency of hydro systems in general ranges between 65-75% in micro and small applications climbing up to 96% in macro designs. It is mostly due to flexibility in applications, adaptability in combinations with other renewable energy systems and the ability to generate clean, stable, thus reliable energy that makes technical development the most vibrant and noticeable in the micro sphere.

  15. Parametric distribution approach for flow availability in small hydro potential analysis

    Science.gov (United States)

    Abdullah, Samizee; Basri, Mohd Juhari Mat; Jamaluddin, Zahrul Zamri; Azrulhisham, Engku Ahmad; Othman, Jamel

    2016-10-01

    Small hydro system is one of the important sources of renewable energy and it has been recognized worldwide as clean energy sources. Small hydropower generation system uses the potential energy in flowing water to produce electricity is often questionable due to inconsistent and intermittent of power generated. Potential analysis of small hydro system which is mainly dependent on the availability of water requires the knowledge of water flow or stream flow distribution. This paper presented the possibility of applying Pearson system for stream flow availability distribution approximation in the small hydro system. By considering the stochastic nature of stream flow, the Pearson parametric distribution approximation was computed based on the significant characteristic of Pearson system applying direct correlation between the first four statistical moments of the distribution. The advantage of applying various statistical moments in small hydro potential analysis will have the ability to analyze the variation shapes of stream flow distribution.

  16. Hydro power plants, an overview of the current types and technology

    Science.gov (United States)

    Tkáč, Štefan

    2018-03-01

    Despite the long history of hydropower technology and rising number of system harvesting energy from alternative sources, the constant research within hydro power sector becoming increasingly important as the power from water was and still is the leading alternative source of green energy generation, capitalized not necessarily within micro-urban structures only. The advantages of hydro systems involve their relatively low acquisition cost against durability, the possibility of gaining energy independence, relatively high flexibility and adaptability for spatial conditions and energy demands of the end users. Nowadays micro hydro systems could capitalize head range starting at 100cm and the efficiency of hydro systems in general ranges between 65-75% in micro and small applications climbing up to 96% in macro designs. It is mostly due to flexibility in applications, adaptability in combinations with other renewable energy systems and the ability to generate clean, stable, thus reliable energy that makes technical development the most vibrant and noticeable in the micro sphere.

  17. Short-term hydro-thermal scheduling using particle swarm optimization method

    International Nuclear Information System (INIS)

    Yu, Binghui; Yuan, Xiaohui; Wang, Jinwen

    2007-01-01

    The approaches based on different particle swarm optimization (PSO) techniques are applied to solve the short-term hydro-thermal scheduling problem. In the proposed methods, many constraints of the hydro-thermal system, such as power balance, water balance, reservoir volume limits and the operation limits of hydro and thermal plants, are considered. The feasibility of the proposed algorithm is demonstrated through an example system, and the results are compared with the results of a genetic algorithm and evolutionary programming approaches. The experimental results show that all the PSO algorithms have the ability to achieve nearly global solutions, but a local version of PSO with inertia weight appears to be the best amongst all the PSOs in terms of high quality solution

  18. Ontario Hydro's transportation of radioactive material and emergency response plan

    International Nuclear Information System (INIS)

    Karmali, N.

    1993-01-01

    Ontario Hydro has been transporting radioactive material for almost 30 years without any exposure to the public or release to the environment. However, there have been three accidents involving Hydro's shipments of radioactive material. In addition to the quality packaging and shipping program, Ontario Hydro has an Emergency Response Plan and capability to deal with an accident involving a shipment of radioactive material. The Corporation's ability to respond, to effectively control and contain the situation, site remediation, and to provide emergency public information in the event of a road accident minimizes the risk to the public and the environment. This emphasizes their commitment to worker safety, public safety and impact to the environment. Response capability is mandated under various legislation and regulations in Canada

  19. Development of HydroImage, A User Friendly Hydrogeophysical Characterization Software

    Energy Technology Data Exchange (ETDEWEB)

    Mok, Chin Man [GSI Environmental; Hubbard, Susan [Lawrence Berkeley National Laboratory; Chen, Jinsong [Lawrence Berkeley National Laboratory; Suribhatla, Raghu [AMEC E& I; Kaback, Dawn Samara [AMEC E& I

    2014-01-29

    HydroImage, user friendly software that utilizes high-resolution geophysical data for estimating hydrogeological parameters in subsurface strate, was developed under this grant. HydroImage runs on a personal computer platform to promote broad use by hydrogeologists to further understanding of subsurface processes that govern contaminant fate, transport, and remediation. The unique software provides estimates of hydrogeological properties over continuous volumes of the subsurface, whereas previous approaches only allow estimation of point locations. thus, this unique tool can be used to significantly enhance site conceptual models and improve design and operation of remediation systems. The HydroImage technical approach uses statistical models to integrate geophysical data with borehole geological data and hydrological measurements to produce hydrogeological parameter estimates as 2-D or 3-D images.

  20. HydroCoil as an adjuvant to bare platinum coil treatment of 100 cerebral aneurysms

    International Nuclear Information System (INIS)

    Fanning, Noel F.; Berentei, Zsolt; Brennan, Paul R.; Thornton, John

    2007-01-01

    Introduction The overall safety of the HydroCoil, an expansile hybrid hydrogel-platinum coil, is unknown. We report a prospective observational study of our first 100 cerebral aneurysms treated with HydroCoils, focusing on safety and initial efficacy.Methods Indications, procedural complications, clinical and angiographic outcomes were recorded. Packing density, number of coils deployed and angiographic results were compared with those in a matched control group of 100 aneurysms treated solely with bare platinum coils. HydroCoil complication rates were compared to bare platinum coil rates at our institution and in published series. Results Adjuvant HydroCoil treatment led to increased mean percentage aneurysm filling compared to controls (50 ± 21% versus 27 ± 13%, P < 0.001). Immediate posttreatment angiographic results showed significantly (P < 0.001) more complete occlusions and fewer incomplete (<95%) occlusions compared to controls. Intermediate follow-up angiograms (median 7.5 months) in 63 aneurysms showed a trend towards fewer incomplete occlusions with HydroCoil treatment. There were significantly fewer major recurrences with HydroCoil treatment compared to the control treatment (9.5% versus 22.6%, P 0.046). In the adjuvant HydroCoil group, major recurrent aneurysms had significantly less percentage volume packing with HydroCoils than non-recurrent aneurysms (50.3 ± 5.0% versus 65.3 ± 18.0%, P = 0.04). There was a 12% procedural complication rate, 6% procedural morbidity and 1% mortality rate, similar to institutional and reported bare platinum coil complication rates.Conclusion HydroCoils can be safely deployed with a similar complication rate to bare platinum coils. They result in improved aneurysm filling. Intermediate follow-up angiography showed significantly fewer major recurrences. Long-term follow-up is required to confirm initial improved stability. (orig.)

  1. Study of cavitation in hydro turbines. A review

    Energy Technology Data Exchange (ETDEWEB)

    Kumar, Pardeep; Saini, R.P. [Alternate Hydro Energy Centre, Indian Institute of Technology, Roorkee 247667 (India)

    2010-01-15

    Reaction turbines basically Francis turbines and propeller/Kaplan turbines are suitable for medium and low head hydropower sites. The management of the small hydropower plants is an important factor, for achieving higher efficiency of hydro turbines with time. Turbines show declined performance after few years of operation, as they get severely damaged due to various reasons. One of the important reasons is erosive wear of the turbines due to cavitation. Reaction turbines, however are more prone to cavitation especially Francis turbines where a zone in the operating range is seriously affected by cavitation and considered as forbidden zone. Cavitation is a phenomenon which manifests itself in the pitting of the metallic surfaces of turbine parts because of the formation of cavities. In the present paper, studies undertaken in this field by several investigators have been discussed extensively. Based on literature survey various aspects related to cavitation in hydro turbines, different causes for the declined performance and efficiency of the hydro turbines and suitable remedial measures suggested by various investigators have been discussed. (author)

  2. Hydro-Thermal Fatigue Resistance Measurements on Polymer Interfaces

    Science.gov (United States)

    Gurumurthy, Charan K.; Kramer, Edward J.; Hui, Chung-Yuen

    1998-03-01

    We have developed a new technique based on a fiber optic displacement sensor for rapid determination of hydro-thermal fatigue crack growth rate per cycle (da/dN) of an epoxy/polyimide interface used in flip chip attach microelectronic assembly. The sample is prepared as a trilayered cantilever beam by capillary flow of the epoxy underfill over a polyimide coated metallic beam. During hydro-thermal cycling the crack growth along the interface (from the free end) changes the displacement of this end of the beam and we measure the free end displacement at the lowest temperature in each hydro-thermal cycle. The change in beam displacement is then converted into crack growth rate (da/dN). da/dN depends on the maximum change in the strain energy release rate of the crack and the phase angle in each cycle. The relation between da/dN and maximum strain energy release rate characterizes the fatigue crack growth resistance of the interface. We have developed and used a simple model anhydride cured and a commercially available PMDA/ODA passivation for this study.

  3. Challenging hydro-hegemony

    DEFF Research Database (Denmark)

    Wessels, Josepha Ivanka

    2015-01-01

    Bank. Both case studies show that control over water resources and supply provides political power over others at local level. Yet non-violent resistance can be observed in these border areas. In border areas between Israel, Syria and Palestine, control over access and water supply plays an important...... role in the ability of Israel to exercise hegemonic power in daily hydro-politics, which in the long term is detrimental for the people and the environment and disrupts the hydrological balance in the entire Jordan River basin....

  4. Economic impact of Hydro-Quebec's nuclear activities

    International Nuclear Information System (INIS)

    Emard, R.

    1994-01-01

    Gentilly 2 nuclear power plant has benefited the regions of Becancour and Trois Rivieres, with spin-off at the provincial level. Gentilly 2 is Hydro Quebec's only nuclear plant. Its 675 MW provide nearly 3% of Hydro Quebec's production. Over 664 permanent jobs were created, 70% of them highly specialized and multi-skilled. In 1993, out of C$99 spent, 57.3 were for wages, 16.3 for equipment and supplies (including fuel and heavy water), 18 for professional services provided by AECL and others, and the remainder included fees, permits, contract work, and miscellaneous. Gentilly 2 has fostered technological development and inventions which are used at other CANDU stations. 7 ills

  5. Hydro-Quebec opens up, expects positive reaction from FERC

    International Nuclear Information System (INIS)

    McArthur, D.; Salaff, S.

    1997-01-01

    Hydro-Quebec Energy Services US (HQUS), the marketing arm of Hydro-Quebec, amended its application for a power marketing licence with the Federal Energy Regulatory Commission (FERC), by offering to open up five per cent of the wholesale Quebec electricity market to competition. The Corporation hopes that its revised application will satisfy FERC to grant HQUS a power marketer licence, with the right to sell electricity in the US at market-based rates. Hydro-Quebec insiders believe that in addition to opening up the market to competition, thereby equalizing market conditions on both sides of the border, the Corporation's chances of receiving the licence also have been improved by the creation of the provincial energy board (Regie de l'energie) which in future will regulate electricity and gas transmission through Quebec, and establish transmission tariffs. FERC ruling is expected within 60 days of the March 7, 1997 amended application

  6. Objective thermo-hydro-mechanical modelling of the damaged zone around a radioactive waste storage site

    International Nuclear Information System (INIS)

    Marinelli, Ferdinando

    2013-01-01

    We present two different approaches to describe the hydro-mechanical behaviour of geo-materials. In the first approach the porous media is studied through an equivalent continuum media where the interaction between the fluid and solid phases characterize the coupling behaviour at the macro-scale. We take into account this approach to model experimental tests performed over a hollow cylinder sample of clay rock (Boom Clay), considered for nuclear waste storage. The experimental results clearly show that the mechanical behaviour of the material is strongly anisotropic. For this reason we chose an elasto-plastic model based on Drucker-Prager criterion where the elastic part is characterized by cross anisotropy. The numerical results of boundary value problem clearly show localised strains around the inner hollow section. In order to regularize the numerical problem we consider a second gradient local continuum media with an enriched kinematic where an internal length can be introduced making the results mesh independent. The uniqueness study is carried out showing that changing the temporal discretization of the problem leads to different solutions. In the second approach we study the hydro-mechanical behaviour of a porous media that it is characterised by the microstructure of the material. The microstructure taken into account is composed by elastic grains, cohesive interfaces and a network of fluid channels. Using a periodic media a numerical homogenization (square finite element method) is considered to compute mass flux, stress and density of the mixture. In this way a pure numerical constitutive law is built from the microstructure of the media. This method has been implemented into a finite element code (Lagamine, Universite de Liege) to obtain results at the macro-scale. A validation of this implementation is performed for a pure mechanical boundary value problem and for a hydro-mechanical one. (author)

  7. Micro-hydro power in the UK: The role of communities in an emerging energy resource

    International Nuclear Information System (INIS)

    Bracken, L.J.; Bulkeley, H.A.; Maynard, C.M.

    2014-01-01

    Research around micro-hydro power is focused on technical aspects with limited understanding of the social organisation and environmental implications. We examine the ways in which micro-hydro is engaged by people and organisations as a means of contributing to the UK's policy ambition for renewable energy. We bring to the fore the way in which expertise is used and contested. A web based review of micro-hydro schemes in the UK was undertaken and a detailed evaluation of two schemes in the North of England was conducted to determine how expertise and contestation figures in community schemes. Results demonstrate a rapid expansion of micro-hydro in the UK. Ownership/control is highly ‘community based’. Until now research around micro-hydro has been dominated by technical approaches with schemes defined in terms of hardware. We propose a third dimension to Walker and Cass's (2007) classification of renewable energy developments: the environmental dimension. We suggest this dimension of micro-hydro is critical, both in terms of the extent to which resources can be realised but also the ways in which it might attract controversy, in particular around how expertise is used and valued. - Highlights: • Analysis of micro-hydro schemes in the UK demonstrates a recent rapid expansion. • We propose a third dimension to renewable energy developments: the environmental dimension. • The environmental dimension of micro-hydro determines how resources are realised. • Environmental features underpin the controversy which can emerge around schemes. • The ownership of micro-hydro schemes is highly ‘community based’

  8. Small hydro generation building block profile

    International Nuclear Information System (INIS)

    2003-01-01

    Concise business information on small hydro generation in British Columbia was presented in this document. It was noted that the steep terrain within the province and its abundant precipitation provides numerous opportunities for hydropower generation in British Columbia. The hydroelectric sector produces approximately 90 per cent of the electrical demand in the province. The document focusses on small hydro sites producing between 0.5 and 50 mega watts (MW) and not having large water storage. In the first section, an overview of the electricity sector in the province is provided. The following issues are examined in subsequent sections: land resources; infrastructure requirements; sales market; labour market; the regulatory regime; development factors; non-governmental aspects; investments and economics; the present status and future outlook of the industry; and, government revenue. Input-output tables were also provided. 22 refs., 5 tabs., 4 figs

  9. Operational and structural measures to reduce hydro-peaking impact on fish larvae

    International Nuclear Information System (INIS)

    Kopecki, Ianina; Schneider, Matthias

    2016-01-01

    Eco-hydraulic investigations studying the effects of hydro-peaking on river biota are gaining in importance. Negative effects of rapid flow fluctuations due to hydro power production are well documented by many studies, with the larvae and juvenile fish identified among the mostly affected life stages. Therefore, elaboration of efficient hydro-peaking mitigation strategies is an important issue for energy companies as well as for water body administrations responsible for the fulfilment of WFD requirements. The present case study strives for practical solutions allowing to minimize or compensate the negative effects of hydro-peaking on the fish fauna of the 7 km long river reach on the river Lech (southern Germany). Model based investigations allow to access the impact from currently authorized discharge regime, suggest operational and structural measures within the reach in terms of reducing the risk of stranding for fish larvae and select the measures most easy to implement and with the largest ecological benefit. The paper describes the approach for accessing the effects of hydro-peaking based on 2D hydrodynamic modelling, fuzzy logic based habitat modelling and information on cutting-edge biological investigations on fish larvae from Lunz experimental facility (Austria). (authors)

  10. Parameterisation effect on the behaviour of a head-dependent hydro chain using a nonlinear model

    International Nuclear Information System (INIS)

    Catalao, J.P.S.; Mariano, S.J.P.S.; Mendes, V.M.F.; Ferreira, L.A.F.M.

    2006-01-01

    This paper is on the problem of short-term hydro scheduling (STHS), particularly concerning a head-dependent hydro chain. We use a method based on nonlinear programming (NLP), namely quadratic programming, to consider hydroelectric power generation a function of water discharge and of the head. The method has been applied successfully to solve a test case based on a realistic cascaded hydro system with a negligible computational time requirement and is also applied to show that the role played by reservoirs in the hydro chain do not depend only on their relative position. As a new contribution to earlier studies, which presented reservoir operation rules mainly for medium and long-term planning procedures, we show that the physical data defining hydro chain parameters used in the nonlinear model have an effect on the STHS, implying different optimal storage trajectories for the reservoirs accordingly not only with their position in the hydro chain but also with the new parameterisation defining the data for the hydro system. Moreover, considering head dependency in the hydroelectric power generation, usually neglected for hydro plants with a large storage capacity, provides a better short-term management of the conversion of the potential energy available in the reservoirs into electric energy, which represents a major advantage for the hydroelectric utilities in a competitive electricity market. (author)

  11. [Ontario Hydro]. 1995 corporate budget and 1995--1997 business plan

    International Nuclear Information System (INIS)

    1995-01-01

    Ontario Hydro's corporate mission is to make Ontario Hydro a leader in energy efficiency and sustainable development, and to provide its customers with safe and reliable energy services at competitive prices. This document summarizes the corporation's work and financial results planned for the previous year and forecast for the two following years. It represents a consolidation of business plans prepared by the various business units

  12. [Ontario Hydro]. 1994 corporate budget and 1994--1996 business plan

    International Nuclear Information System (INIS)

    1994-01-01

    Ontario Hydro's Corporate mission is to make Ontario Hydro a leader in energy efficiency and sustainable development, and to provide its customers with safe and reliable energy services at competitive prices. This document summarizes the Corporation's work and financial results planned for the previous year and forecast for the two following years. It represents a consolidation of business plans prepared by the various Business Units

  13. Hydro-Quebec looks to integrated development of Quebec and its regions

    International Nuclear Information System (INIS)

    Bissonnette, Lise

    1995-01-01

    Hydro-Quebec's telecommunication system, the largest private telecommunications network in Canada, was discussed. The network was set up to assure safety and efficiency of the power plants and energy transmission and distribution lines. By the year 2000 Hydro-Quebec will need electronic links with all its industrial, commercial and residential customers in order to guarantee competitive service and full customer satisfaction. Investments of about one half billion dollars have been earmarked to boost the capacity of their telecommunications grid and meet steadily growing needs. As a result of the very difficult negotiations to resolve the native land claims issue, Hydro-Quebec was forced to adapt a strict and far-reaching environmental policy, which is now beginning to pay off not only in environmental terms, but also in terms of goodwill among actual and prospective customers. As a result of these huge infrastructure projects Hydro Quebec will be in a position to guarantee people access to energy at a price that is among the lowest in the world. Although demand growth could slow, demand itself will not wane. As part of this overall strategy, Hydro-Quebec plans to defer large-scale projects, instead, for the foreseeable future it will concentrate on smaller power plants, some of which could be built on rivers that have already been tamed

  14. Using ecosystem services to represent the environment in hydro-economic models

    Science.gov (United States)

    Momblanch, Andrea; Connor, Jeffery D.; Crossman, Neville D.; Paredes-Arquiola, Javier; Andreu, Joaquín

    2016-07-01

    Demand for water is expected to grow in line with global human population growth, but opportunities to augment supply are limited in many places due to resource limits and expected impacts of climate change. Hydro-economic models are often used to evaluate water resources management options, commonly with a goal of understanding how to maximise water use value and reduce conflicts among competing uses. The environment is now an important factor in decision making, which has resulted in its inclusion in hydro-economic models. We reviewed 95 studies applying hydro-economic models, and documented how the environment is represented in them and the methods they use to value environmental costs and benefits. We also sought out key gaps and inconsistencies in the treatment of the environment in hydro-economic models. We found that representation of environmental values of water is patchy in most applications, and there should be systematic consideration of the scope of environmental values to include and how they should be valued. We argue that the ecosystem services framework offers a systematic approach to identify the full range of environmental costs and benefits. The main challenges to more holistic representation of the environment in hydro-economic models are the current limits to understanding of ecological functions which relate physical, ecological and economic values and critical environmental thresholds; and the treatment of uncertainty.

  15. Decision making algorithms for hydro-power plant location

    CERN Document Server

    Majumder, Mrinmoy

    2013-01-01

    The present study has attempted to apply the advantage of neuro-genetic algorithms for optimal decision making in maximum utilization of natural resources. Hydro-power is one of the inexpensive, but a reliable source of alternative energy which is foreseen as the possible answer to the present crisis in the energy sector. However, the major problem related to hydro-energy is its dependency on location. An ideal location can produce maximum energy with minimum loss. Besides, such power-plant also requires substantial amount of land which is a precious resource nowadays due to the rapid and unco

  16. Hydro models and salmon recovery in the northwest

    International Nuclear Information System (INIS)

    Dragoon, K.

    1993-01-01

    Hydro regulation models provide extensive support for analyzing the efficacy of salmon recovery plans in the Northwest. Power planners developed these computer programs to help plan and efficiently operate a large multiple use river system. The models represent physical relationships and operational requirements on the system. They also simulate coordinated system operations for efficient power generation. These models are being pressed into service to provide data for fish recovery plans. They provide important information about hydro system capabilities and responses to recovery programs. However, the models cannot meet all of the analytical needs of fish biologists working toward salmon recovery

  17. Mobile units to hydro geochemistry characterization

    International Nuclear Information System (INIS)

    Gomez, P.; Martinez, B.; Turrero, M.J.

    1994-01-01

    This report shows the mobile units for hydro geochemical studies. The authors analyze the work of mobile unit and the cars that conform the unit: Sampling car and analysis car: The sampling and equipment are took into account as well

  18. Investigation research on the evaluation of a coupled thermo-hydro-mechanical-chemical phenomena. 3. Result Report

    International Nuclear Information System (INIS)

    Ishihara, Yoshinao; Ito, Takaya; Chijimatsu, Masakazu; Amemiya, Kiyoshi; Shiozaki, Isao

    2004-02-01

    In order to realize a coupling analysis in the near field of the geological disposal system, the coupling analysis code 'COUPLYS (Coupling analysis system)' on the Thermo-Hydro-Mechanical-Chemical (THMC) phenomena by THAMES, Dtransu and phreeqc, which are existing analysis code, is developed in this study. And some case analyses on THMC phenomena are carried out by this code. (1) Some supporting modules, which include the transfer of dissolution concentration and total concentration (dissolution + precipitation concentration), were prepared as a functional expansion. And in order to add on the function of treat de-gases and gases diffusion, accumulation and dilution phenomena, the mass transport analysis code was modified. (2) We have modified reactive transport module to treat ionic exchange, surface reaction and kinetic reaction in the each barrier. (3) We have prepared hydraulic conductivity module of buffer material depending on change of dry density due to chemical equilibrium (dissolution and precipitation of minerals), degradation of buffer material such as Ca-type bentonite and change of concentration of NaCl solutions. After THAMES, Dtransu, phreeqc and the hydraulic conductivity module were installed in COUPLYS (Coupling Analysis), verification study was carried out to check basic function. And we have modified COUPLYS to control coupling process. (4) In order to confirm the applicability of the developed THMC analysis code (existing analysis code and COUPLYS), we have carried out case analyses on 1-dimensional and 3-dimensional model which are including vitrified waste, over-pack, buffer material and rock in the HLW near-field. (author)

  19. Hydro-Thermal-Wind Generation Scheduling Considering Economic and Environmental Factors Using Heuristic Algorithms

    Directory of Open Access Journals (Sweden)

    Suresh K. Damodaran

    2018-02-01

    Full Text Available Hydro-thermal-wind generation scheduling (HTWGS with economic and environmental factors is a multi-objective complex nonlinear power system optimization problem with many equality and inequality constraints. The objective of the problem is to generate an hour-by-hour optimum schedule of hydro-thermal-wind power plants to attain the least emission of pollutants from thermal plants and a reduced generation cost of thermal and wind plants for a 24-h period, satisfying the system constraints. The paper presents a detailed framework of the HTWGS problem and proposes a modified particle swarm optimization (MPSO algorithm for evolving a solution. The competency of selected heuristic algorithms, representing different heuristic groups, viz. the binary coded genetic algorithm (BCGA, particle swarm optimization (PSO, improved harmony search (IHS, and JAYA algorithm, for searching for an optimal solution to HTWGS considering economic and environmental factors was investigated in a trial system consisting of a multi-stream cascaded system with four reservoirs, three thermal plants, and two wind plants. Appropriate mathematical models were used for representing the water discharge, generation cost, and pollutant emission of respective power plants incorporated in the system. Statistical analysis was performed to check the consistency and reliability of the proposed algorithm. The simulation results indicated that the proposed MPSO algorithm provided a better solution to the problem of HTWGS, with a reduced generation cost and the least emission, when compared with the other heuristic algorithms considered.

  20. Hydro investment analysis under new market conditions

    Energy Technology Data Exchange (ETDEWEB)

    Doorman, Gerard

    2010-07-01

    Full text: A future energy system with stronger coupling to Europe and with an increased share of non-regulated renewables will lead to increasing variability of the demand faced by the hydro system. In a market based system these variations will be reflected by larger daily price variations, both in the Elspot day ahead market, the Elbas intraday market and in the balancing market. With its unique regulation capabilities, hydro power will be very well positioned to handle these variations. However, existing model concepts for long term hydro scheduling were not developed for this framework, and do not take the new market conditions into account to a sufficient degree. Therefore hydro scheduling tools used for upgrading and investment analysis as well as analysing consequences of new environmental demands need adaptation to a finer temporal resolution, and to perform optimisation under varying constraints and uncertain input data for inflow and electricity prices. Focus is on investment analysis for a river system or power producer. Existing models can be grouped in the long-term (scheduling models with a time horizon up to 5 years) EOPS (Vansimtap), EOPS-ST (SimtapEffekt) and ProdRisk, and the shortterm scheduling models with a typical time horizon up to a few weeks, but focus on 1-2 days (SHOP and ID-SIM). A perfect tool in the present context would combine the properties of the long term stochastic optimisation models with the modelling details of SHOP and/or ID-SIM. However, this is probably not possible and simplifications will be necessary. Some important deficiencies in the present long term models are: Insufficiently realistic plant models in the relevant optimization models; Time delays are not handled; Handing of flexible / state dependent constraints; Handling of ramping constraints; Modelling of the cost of frequent regulations (wear and tear); Reserve markets As a result of these deficiencies the investment analysis does not adequately assess the value

  1. Ontario Hydro statistical yearbook 1990

    International Nuclear Information System (INIS)

    1990-01-01

    Ontario Hydro was created in 1906 by a special statute of the Province of Ontario. It is a financially self-sustaining corporation without share capital. The yearbook is a compilation of financial data detailed by financial statements and sales and revenue figures for the year 1990. It is broken down by municipalities served in Ontario

  2. Ontario Hydro statistical yearbook 1990

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1991-12-31

    Ontario Hydro was created in 1906 by a special statute of the Province of Ontario. It is a financially self-sustaining corporation without share capital. The yearbook is a compilation of financial data detailed by financial statements and sales and revenue figures for the year 1990. It is broken down by municipalities served in Ontario.

  3. Ontario Hydro annual report 1975

    International Nuclear Information System (INIS)

    A financial report and statistics on Ontario energy demand are presented. Efforts to secure a reliable supply of coal and uranium are described. Ontario Hydro's expansion is now controlled by capital availability and not power demand, and this has affected 11 construction projects, including heavy water plants and nuclear generating stations. (E.C.B.)

  4. Ontario Hydro at the millennium : has monopoly's moment passed?

    International Nuclear Information System (INIS)

    Daniels, R.J.

    1996-01-01

    This volume is a collection of 10 papers presented at a conference in which the challenges of restructuring the electric power industry in Ontario were discussed. Legal experts, policy makers, economists and stakeholders in the industry presented their views regarding the future of the industry in Ontario. The implications of privatization were discussed. There was general agreement on the need for some industry de-integration and privatization. However, agreement on the exact nature of the approach to take was more divided. For example, opinion was divided on what the logical endpoint of industry restructuring should be i.e. wholesale or retail competition. Also contentious was the question of what portion of Hydro's generating assets should be sold off to private enterprise if Hydro's generation and transmission assets are unbundled. Opinions were also divided about the environmental consequences of nuclear energy. Significant differences of opinion were evident concerning the privatization of Ontario Hydro's nuclear assets. refs., tabs., figs

  5. The take-over of Gaz Metropolitain by Hydro-Quebec

    International Nuclear Information System (INIS)

    Bernard, J-T.

    1997-01-01

    The implications of a take-over of Gaz Metropolitain by Hydro-Quebec in early 1997 and the pricing of electricity and natural gas in Quebec were discussed. In January 1997, Hydro-Quebec purchased all the shares in Noverco that were formerly owned by SOQUIP. With this purchase, Hydro-Quebec became the major share holder in Noverco, the company that controls Gaz Metropolitain. This type of take-over, where an electrical utility purchases the interests in a natural gas distributor, has also been observed in the United States and is believed to be a consequence of the recent deregulation of the electricity market. In the near future, it is believed that consumers will probably pay for equivalent energy use (like heating or cooling) rather than separate tariffs for electricity or natural gas consumption. The recent popularity of gas-fueled electrical cogenerating stations is also believed to be an important factor in this take-over. 1 ref., 3 tabs

  6. Theoretical and conditional monitoring of a small three-bladed vertical-axis micro-hydro turbine

    International Nuclear Information System (INIS)

    Huang, Sy-Ruen; Ma, Yen-Huai; Chen, Chia-Fu; Seki, Kazuichi; Aso, Toshiyuki

    2014-01-01

    Highlights: • This paper presents a novel 3 three-bladed vertical-axis micro-hydro turbine system. • This paper presents structure and performance of micro-hydroelectric turbine system. • The paper reveal that using VAMHT system in water is distinct from using in wind. • This paper present an experimental results of VAMHT system. • The paper show that the status transformation from cut-into stable power generation is short. - Abstract: This paper presents a novel 3-kW three-bladed vertical-axis micro-hydro turbine (VAMHT) system. The experimental results reveal that using this type of turbine in water is distinct from using it in wind. The micro-hydro turbine system uses a three-phase permanent magnet symmetric generator that transforms mechanical energy into electrical energy. The output voltage and frequency of the generator depend on water flow speed, and voltage steady equipment is used to maintain the maximum output power of the DC bus. According to the maximum power point tracking of the micro-hydro turbine system, the condition monitoring of the novel micro-hydro turbine requires no water flow meter. Furthermore, the construction and installation of the new micro-hydro turbine is simple, economical, and stable. This system combines a micro-hydro generator and electrical state-monitoring system, which can measure the speed, output power, DC-bus voltage, and all electrical characteristics of the micro-hydro turbine system. The results of comparing turbine between wind and water show that the speed ranges of water flow is narrower than that of wind, and the status transformation from cut-into stable power generation is short

  7. 77 FR 26796 - HydroGenetics, Inc.; Order of Suspension of Trading

    Science.gov (United States)

    2012-05-07

    ... Trading May 2, 2012. It appears to the Securities and Exchange Commission that there is a lack of current... require a suspension of trading in the securities of HydroGenetics. Therefore, it is ordered, pursuant to Section 12(k) of the Securities Exchange Act of 1934, that trading in the securities of HydroGenetics is...

  8. Gross greenhouse gas fluxes from hydro-power reservoir compared to thermo-power plants

    International Nuclear Information System (INIS)

    Santos, Marco Aurelio dos; Pinguelli Rosa, Luiz; Sikar, Bohdan; Sikar, Elizabeth; Santos, Ednaldo Oliveira dos

    2006-01-01

    This paper presents the findings of gross carbon dioxide and methane emissions measurements in several Brazilian hydro-reservoirs, compared to thermo power generation. The term 'gross emissions' means gas flux measurements from the reservoir surface without natural pre-impoundment emissions by natural bodies such as the river channel, seasonal flooding and terrestrial ecosystems. The net emissions result from deducting pre-existing emissions by the reservoir. A power dam emits biogenic gases such as CO 2 and CH 4 . However, studies comparing gas emissions (gross emissions) from the reservoir surface with emissions by thermo-power generation technologies show that the hydro-based option presents better results in most cases analyzed. In this study, measurements were carried in the Miranda, Barra Bonita, Segredo, Tres Marias, Xingo, and Samuel and Tucurui reservoirs, located in two different climatological regimes. Additional data were used here from measurements taken at the Itaipu and Serra da Mesa reservoirs. Comparisons were also made between emissions from hydro-power plants and their thermo-based equivalents. Bearing in mind that the estimated values for hydro-power plants include emissions that are not totally anthropogenic, the hydro-power plants studied generally posted lower emissions than their equivalent thermo-based counterparts. Hydro-power complexes with greater power densities (capacity/area flooded-W/m 2 ), such as Itaipu, Xingo, Segredo and Miranda, have the best performance, well above thermo-power plants using state-of-the-art technology: combined cycle fueled by natural gas, with 50% efficiency. On the other hand, some hydro-power complexes with low-power density perform only slightly better or even worse than their thermo-power counterparts

  9. Issue of ecological impacts due to hydro-peaking management. Characterization of hydro-peaks - Operating experience on Maronne River; Impacts ecologiques des eclusees hydroelectriques. Caracterisaton des regimes d'eclusees et Retour d'experience sur la Maronne

    Energy Technology Data Exchange (ETDEWEB)

    Courret, Dominique; Larinier, Michel [Office National de l' Eau et des Milieux Aquatiques - ONEMA, Pole Ecohydraulique, IMFT, Cemagref, Avenue du Professeur Camille Soula, 31400 Toulouse (France); Chanseau, Matthieu [MIGADO, 18ter rue de la Garonne - 47520 Le Passage (France); Office National de l' Eau et des Milieux Aquatiques - ONEMA, Direction Interregionale de Toulouse, Avenue du Professeur Camille Soula, 31400 Toulouse (France); Lascaux, Jean-Marc [Etudes et COnseils en Gestion de l' Environnement Aquatique - ECOGEA, 10 avenue de Toulouse, 31860 Pins-Justaret (France)

    2012-01-15

    Hydro-peaking management can consistently alter fish populations, and particularly recruitment of diadromous species, like salmon. To progress in understanding the impacts and defining mitigation measures, it appears essential to combine long-term biological survey, hydrological analysis including hydro-peaks characterization, and hydro-morphologic approach. In a first time, a methodology for hydrological characterization of hydro-peaks is presented. Their diversity and high variability are illustrated. Then, we present operating experience on Maronne River, a tributary of the Dordogne River downstream Argentat affected by hydro-peaks of Hautefage scheme. Biological surveys and hydrologic and hydro-morphologic studies allowed a better understanding and a quantification of some biological impacts (redds dewatering, stranding-trapping of alevins), to support mitigation measures and to assess its effectiveness. The relevance of work on morphology, in addition to measures on flow management, is also illustrated. Some positive results have already been obtained. Studies on the Maronne River are pursued to achieve a really satisfactory situation. This example shows that the current knowledge does not allow, on a given stream, to pre-define mitigation measures and ensure their efficiency. This leads to advocate the setting up of similar approach on other river, to identify biological communities' responses depending on the characteristics of hydro-peaks and hydro-systems. (authors)

  10. MEA [Municipal Electric Association] declares opposition to 1991 Ontario Hydro rate increase

    International Nuclear Information System (INIS)

    Anon.

    1991-01-01

    In hearings before the Ontario Energy Board, the Municipal Electric Association (MEA) called for an average 1992 rate increase of 10.3%, lower than Ontario Hydro's revised figure of 10.4%, and a $129 million reduction in its operations, maintenance and administration budget. As it has been noted that Hydro pays considerably higher wages than the surrounding reference community, MEA recommended that the utility reduce and eventually eliminate the premium paid to employees, and also called for staff reductions and layoffs for 1991 and 1992. In the area of transmission reliability, MEA stated that Ontario Hydro's transmission maintenance is suffering at the expense of other priorities, and called for reorganizing its transmission plan to achieve target performance by 1996 rather than 1999. In 1991, only 65-70% of maintenance targets were being achieved. MEA also accused Hydro of deferring operational expenditures into deferment and capitalization, creating a false picture of the utility's financial condition. Also discussed at the hearing were the possible overestimating of the effects of Ontario Hydro's demand management programs, the possibility that a shift to time-of-use rates for industrial customers may increase demand, a downgrading of the province's and the utility's credit rating, and the unpleasant side effects of the non-utility generation program

  11. The future role of hydro-electricity in Sub-Saharan Africa

    International Nuclear Information System (INIS)

    Lazenby, J.B.C.

    1989-01-01

    Hydroelectric power currently supplies 56-93% of the electricity requirements of the different geographic areas of Sub-Saharan Africa and accounted for 73% of total requirements in 1980. The continent is richly endowed with hydro resources in all areas, with central Africa possessing the most abundant reserves. Existing installed hydro capacity is 13,500 MW and of the total technical resource of 290,000 MW, some 110,000 MW are estimated to constitute the potential that warrants investigation. The demand for electricity in the region is presently low and growing at 5-10%/y. It is projected to double from 47,000 GWh in 1980 to 110,000-170,000 GWh by the year 2000, and is likely to double again by 2020. Hydro reserves warranting investigation exceed the demand projected for the year 2000 by a ratio of over 3:1 and only 13 countries out of 36 have a ratio less than one. A large proportion of these reserves are estimated to be economic to develop relative to other means of power generation. The development of hydro resources should maintain the proportion of the demand met by hydro in the range of 60-75% well into the 21st century. The existing installed capacity is likely to be increased at the rate of 3,000-5,000 MW per decade to achieve this. Constraints on such increase include the large amounts of capital needed, environmental issues, the need to displace populations affected by flooding, and fluctuations in the oil price which make long-term planning uncertain. 5 refs., 1 fig., 11 tabs

  12. Unbalance influence on the rotating assembly dynamics of a hydro

    Science.gov (United States)

    Jurcu, M.; Pădureanu, I.; Campian, C. V.; Haţiegan, C.

    2018-01-01

    The dynamics of the rotating parts of a hydro is characterized by the dynamic interaction between the rotor, the stator and the working fluid in order to operate the hydro. The main factors influencing the dynamics of the rotating parts of a hydro are: rotor unbalance, unbalanced magnetic pull, shaft misalignment and hydraulic flow regime. Rotor unbalanced is one of the most common factors influencing the dynamic stability of the rotating parts of a hydro. The unbalanced is determined by: uneven distribution of rotating masses, displacement of parts in the rotor during rotation, inhomogeneity of rotor component materials, expansion of the rotor due to heating, and rising speed during the transient discharge of the load. The mechanical imbalance of a rotor can lead to important forces, responsible for the vibration of the machine, which ultimately leads to a shorter operating time. Even a low unbalance can lead, in the case of high speed machines, to major unbalance forces that cause significant damage to the equipment. The unbalance forces cause additional vibrations in the bearings as well as in the foundation plate. To avoid these vibrations, it is necessary in the first stage to balance the static rotor in the construction plant and then to a dynamic rotation balancing.

  13. Coanda hydro intake screen testing and evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Howarth, J.

    2001-07-01

    The objective of this project has been to evaluate the effectiveness, suitability and cost benefit of the Aquashear Coanda effect, maintenance free intake screen for use in small hydro system intakes. (author)

  14. Multiple objective optimization of hydro-thermal systems using Ritz's method

    Directory of Open Access Journals (Sweden)

    Arnáu L. Bayón

    1999-01-01

    Full Text Available This paper examines the applicability of the Ritz method to multi-objective optimization of hydro-thermal systems. The algorithm proposed is aimed to minimize an objective functional that incorporates the cost of energy losses, the conventional fuel cost and the production of atmospheric emissions such as NO x and SO 2 caused by the operation of fossil-fueled thermal generation. The formulation includes a general layout of hydro-plants that may form multi-chains of reservoir network. Time-delays are included and the electric network is considered by using the active power balance equation. The volume of water discharge for each hydro-plant is a given constant amount from the optimization interval. The generic minimization algorithm, which is not difficult to construct on the basis of the Ritz method, has certain advantages in comparison with the conventional methods.

  15. Magneto-hydro-dynamic simulation of Edge-Localised-Modes in tokamaks

    International Nuclear Information System (INIS)

    Pamela, S.

    2010-01-01

    In order to produce energy from fusion reactions in a tokamak, the plasma must reach temperatures higher than that of our sun. The operation regime called H-mode enables one to acquire a plasma confinement close to fusion conditions. Due to the formation of a transport barrier at the plasma edge, turbulent transport is reduced, and the total plasma pressure increases, resulting in a strong pressure gradient at the edge. If this pressure gradient, localised at the plasma-vacuum boundary, becomes too steep, a magneto-hydro-dynamic instability is triggered and part of the plasma pressure is lost. This instability, hence called Edge-Localised-Mode, provokes large heat fluxes on some of the plasma-facing components of the machine, which could set operational limits for a tokamak the size of ITER. In order to understand this instability, and to determine the non-linear mechanisms behind the ELMs, the JOREK code is used. The work presented in this thesis is based on MHD simulations of ballooning modes (responsible for ELMs) with the JOREK code. At first, simulations are done for standard plasmas, inspired of experimental machines. In particular, the plasma rotation at equilibrium, in the region of the edge pressure gradient, is studied in order to obtain an analysis of the effects that such a rotation can have on the linear stability of ELMs and on their non-linear evolution. Then, as a second step, simulations are applied to plasmas of the experimental tokamaks JET and MAST (England). This permits the direct comparison of simulation results with experimental observations, with the main goal of improving our global understanding of ELMs. Adding to this physics aspect, the confrontation of the JOREK code with diagnostics of JET and MAST brings to a validation of simulations, which should prove that the simulations which were obtained do correspond to ELM instabilities. This first step towards the validation of the code is crucial concerning the simulation of ELMs in ITER

  16. Planning and installing micro-hydro systems a guide for designers, installers and engineers

    CERN Document Server

    Elliott, Chris

    2014-01-01

    An essential addition to the Earthscan Planning & Installing series, Planning and Installing Micro-Hydro Systems provides vital diagrams, pictures and tables detailing the planning and installing of a micro-hydro system, including information on the maintenance and economics once an installation is running. The book covers subjects such as measuring head and flow, ecological impacts, scheme layouts, practical advice, calculations and turbine choice. Archimedes screws are also covered in detail, as well as the main conventional choices relevant to small sites.Micro-hydro refers to hydropower sy

  17. Mixed-integer nonlinear approach for the optimal scheduling of a head-dependent hydro chain

    Energy Technology Data Exchange (ETDEWEB)

    Catalao, J.P.S.; Pousinho, H.M.I. [Department of Electromechanical Engineering, University of Beira Interior, R. Fonte do Lameiro, 6201-001 Covilha (Portugal); Mendes, V.M.F. [Department of Electrical Engineering and Automation, Instituto Superior de Engenharia de Lisboa, R. Conselheiro Emidio Navarro, 1950-062 Lisbon (Portugal)

    2010-08-15

    This paper is on the problem of short-term hydro scheduling (STHS), particularly concerning a head-dependent hydro chain. We propose a novel mixed-integer nonlinear programming (MINLP) approach, considering hydroelectric power generation as a nonlinear function of water discharge and of the head. As a new contribution to earlier studies, we model the on-off behavior of the hydro plants using integer variables, in order to avoid water discharges at forbidden areas. Thus, an enhanced STHS is provided due to the more realistic modeling presented in this paper. Our approach has been applied successfully to solve a test case based on one of the Portuguese cascaded hydro systems with a negligible computational time requirement. (author)

  18. 75 FR 65312 - Vortex Hydro Energy, LLC; Notice of Competing Preliminary Permit Application Accepted for Filing...

    Science.gov (United States)

    2010-10-22

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project No. 13831-000] Vortex Hydro... Comments and Interventions October 15, 2010. On August 9, 2010, Vortex Hydro Energy, LLC filed an... 0.788 gigawatt-hours. Applicant Contact: Gus Simiao, CEO, Vortex Hydro Energy, LLC, 2512 Carpenter...

  19. 76 FR 76155 - Nevada Hydro Company, Inc.; Notice of Preliminary Permit Application Accepted for Filing and...

    Science.gov (United States)

    2011-12-06

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project No. P-14227-000] Nevada Hydro..., Motions To Intervene, and Competing Applications On July 14, 2011, the Nevada Hydro Company (Nevada Hydro... Diego Gas & Electric Company transmission line located to the south. Applicant Contact: Arnold B...

  20. Hydro-Quebec : annual report 1998 : for today and tomorrow

    International Nuclear Information System (INIS)

    1999-01-01

    Hydro-Quebec is a publicly owned company with a single shareholder, the Quebec government. In 1998, the utility had over 31,400 MW in installed capacity, ranking it among North America's largest distributors of electrical energy. This report provides a review of progress and financial highlights including revenue, expenditure, financial expenses, net income, total assets, long term debt, shareholder's equity and the overall financial position of the utility. In 1998 sales totaled 161.4 TWh, with Quebec markets accounting for more than 88 percent and sales, outside Quebec accounting for 11.5 per cent. Three factors related to weather impacted the utility in 1998. The first was mild weather which brought down domestic and agricultural power consumption by 3 TWh compared with the average recorded in the past half-century. The second was low precipitation which caused Hydro-Quebec to turn to means other than hydroelectric generation to supply power to Quebec customers. These included start-up generation of the Tracy thermal generating station, reduction of sales on short-term markets outside Quebec, and electricity purchases on external markets. The third factor was the ice storm of January 1998, which caused significant damage to part of Hydro-Quebec's transmission and distribution systems. Throughout the year, Hydro-Quebec worked in reinforcing its power lines to prevent repetition of the devastation that occurred during the ice storm. In spite of the events of January 1998, the Utility remains committed to the growth and profitability orientations laid out in its Strategic Plan for 1998-2002. Significant progress was made in consolidating the Utility's position in international markets. Productive partnerships have been established with the Quebec Federation of Labour Solidarity Fund, and with Gaz de France. A network of international partners in a score of countries also has been developed. Hydro-Quebec has completed most of its preparations for Year 2000 readiness

  1. Complementarity of hydro and wind power: Improving the risk profile of energy inflows

    International Nuclear Information System (INIS)

    Denault, Michel; Dupuis, Debbie; Couture-Cardinal, Sebastien

    2009-01-01

    The complementarity of two renewable energy sources, namely hydro and wind, is investigated. We consider the diversification effect of wind power to reduce the risk of water inflow shortages, an important energy security concern for hydropower-based economic zones (e.g. Quebec and Norway). Our risk measure is based on the probability of a production deficit, in a manner akin to the value-at-risk, simulation analysis of financial portfolios. We examine whether the risk level of a mixed hydro-and-wind portfolio of generating assets improves on the risk of an all-hydro portfolio, by relaxing the dependence on water inflows and attenuating the impact of droughts. Copulas are used to model the dependence between the two sources of energy. The data considered, over the period 1958-2003, are for the province of Quebec, which possesses large hydro and wind resources. Our results indicate that for all scenarios considered, any proportion of wind up to 30% improves the production deficit risk profile of an all-hydro system. We can also estimate the value, in TW h, of any additional one percent of wind in the portfolio. (author)

  2. 77 FR 21765 - Nevada Hydro Company, Inc.; Notice of Preliminary Permit Application Accepted for Filing and...

    Science.gov (United States)

    2012-04-11

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project No. P-14227-000] Nevada Hydro..., Motions To Intervene, and Competing Applications On July 14, 2011, the Nevada Hydro Company (Nevada Hydro... California Edison located north of the proposed project and to an existing San Diego Gas & Electric Company...

  3. Multiple objective optimization of hydro-thermal systems using Ritz's method

    Directory of Open Access Journals (Sweden)

    L. Bayón Arnáu

    2000-01-01

    Full Text Available This paper examines the applicability of the Ritz method to multi-objective optimization of hydro-thermal systems. The algorithm proposed is aimed to minimize an objective functional that incorporates the cost of energy losses, the conventional fuel cost and the production of atmospheric emissions such as NOx and SO2 caused by the operation of fossil-fueled thermal generation. The formulation includes a general layout of hydro-plants that may form multi-chains of reservoir network.

  4. Studying the cumulative environmental effects of Hydro-Quebec's installations plan

    International Nuclear Information System (INIS)

    Dubeau, D.

    1992-01-01

    The study of the cumulative environmental effects that have been integrated with technical and economic analyses include mercury, land use in the region (territory), natural landscapes, cultural heritages, forest dynamics, regional economies and ways of life. Requests and petitions from the public about Hydro-Quebec projects fall into four categories: welfare of communities, impact on the land, environmental responsibility and preservation of plant and animal species. The cooperation of all concerned is necessary for Hydro-Quebec's developments. (author)

  5. 76 FR 36533 - Bangor Hydro Electric Company; Notice of Request for Waiver

    Science.gov (United States)

    2011-06-22

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Docket No. TS11-5-000] Bangor Hydro Electric Company; Notice of Request for Waiver Take notice that on June 13, 2011, pursuant to section 358.1(d) of the Commission's regulations, 18 CFR 358.1(d) (2011), Bangor Hydro Electric Company (Bangor...

  6. Mini hydro power in Peninsular Malaysia - the past, present and future

    International Nuclear Information System (INIS)

    Bhaskar Kannan

    2006-01-01

    The early development of mini hydro development in Peninsular Malaysia was carried out by the National Electricity Board (NEB) and the projects developed in the 50s and 60s were Ulu Langat (Selangor), Sempam, Kg. Raja , Kuala Terla, and Robinson Falls (all in Pahang). In the 70s the main effort of hydropower development was concentrated on developing major hydropower projects not only to cater to the country increasing demand for electricity but also to the country needs for flood control. This development was feverishly carried out on the Perak River and the prohects built were Temenggor (384 MW), Bersia (72 MW), Kenering (20 MW), Sg Piah (70 MW) and the Kenyir (400 MW) project in Sungai Terengganu. In late 1970s, the government was keen to electrify the rural areas of Peninsular Malaysia and mini hydro power development was thought of as an option to provide electricity to these areas. The Mini Hydro Department of National Electricity Board (MHD) was then formed to undertake the task of planning, developing and implementing mini hydro projects to meet this government aspiration. Table 1 shows the list of projects identified and implemented and its status

  7. Public safety for BC Hydro's dams and powerhouse

    Energy Technology Data Exchange (ETDEWEB)

    Cattanach, D. [BC Hydro, Burnaby, BC (Canada). Emergency Preparedness Security and Public Safety

    2009-07-01

    This presentation reviewed public safety and historical practices at British Columbia (BC) Hydro. Historically, visitors were guided to safe locations at their facilities by visitor centres and public use management areas. Fences and booms were used to protect visitors from the more dangerous areas around the facility. This presentation also described the features of the safety management plans that BC Hydro has in place for each of its 41 facilities. The safety management plans are approved by the plant managers; they have common controls such as fences and signs; and there are excellent maps defining the danger areas. New risks that were identified were also presented. The next steps for BC Hydro include test driving the draft Canadian Dam Association guidelines for the Aberfeldie Dam; a new powerhouse to reduce overtopping of the dam during the spring; and continuing with public safety hazards and controls such as bow-ties. figs.

  8. Summary of Ontario Hydro's 1990-91 zebra mussel research program

    International Nuclear Information System (INIS)

    Claudi, R.; Wiancko, P.M.

    1992-01-01

    Ontario Hydro is the principal supplier of electricity to the Province of Ontario. It serves 3.6 million customers, with an inservice capacity of 28,200 MW. Ontario Hydro has seven fossil, five nuclear, and four hydraulic stations in the Great Lakes Basin and surrounding watershed. In addition, there are another 60 inland hydraulic stations and numerous dams. As the largest single user of raw water from the Great Lakes Basin, Ontario Hydro recognized the need to control zebra mussels early in 1989. At that time, very little was known in North America about the zebra mussel life cycle and potential impact. European utilities were consulted, but as we now know, zebra mussels are not perceived to be a problem in Europe at this time. To satisfy the immediate need for control, chlorination was identified as the most effective interim measure to prevent the fouling of systems which draw water from the aquatic environment. Due to the current regulatory environment, this solution is considered short term and Ontario Hydro was compelled to initiate a comprehensive research effort aimed at providing alternative methods of control. Most of the research effort during 1990, was methods of control. Most of the research effort during 1990, was directed towards this goal. Many alternative control measures, both chemical and nonchemical were considered. Also considered were the potential effects of the control measures and zebra mussels on station operations. A multidisciplinary team involving aquatic biologists, chemists, corrosion specialists, and civil and mechanical engineers from the various departments of Ontario Hydro was asked to address the problem. Some of the research also involved collaborative studies with universities, US utilities, American Water Works Association, and Canadian industries. Following is a summary of the research effort in 1990, and a preview of the research underway in 1991

  9. Hydro-Quebec and energy efficiency

    International Nuclear Information System (INIS)

    1990-01-01

    There is growing awareness that energy efficiency is both profitable and environmentally beneficial. In this year's Development Plan, Hydro-Quebec is proposing an Energy Efficiency Project made up of marketing programs designed for all markets throughout the final decade of the 20th century. This Project will have two aspects: energy efficiency and consumption management. Hydro-Quebec aims to reach an energy-efficiency level of 12.9 terawatt hours per year by 1999, fully 55% of its 23-terawatt hour potential. Over the next 10 years the utility intends to spend $1.8 billion for this purpose. Cumulative anticipated energy savings should be in the vicinity of 70 terawatt hours for the coming decade, and more than 130 terawatt hours for the first decade of the next century. Of the overall goal of 12.9 terawatt hours for Horizon 1999, energy savings of 9.0 terawatt hours should be the direct result of this year's proposed marketing programs, and will account for the bulk of anticipated investments. The remaining 3.9 terawatt hours will be gained as customers acquire better electrical appliance and accessory (household appliances, home insulation) buying habits

  10. Manitoba Hydro-Electric Board 52. annual report : Building as one

    International Nuclear Information System (INIS)

    2003-01-01

    A provincial Crown corporation, Manitoba Hydro serves approximately 502,000 customers throughout Manitoba with electric energy, and provides natural gas service to 251,000 customers in several communities in southern Manitoba. In addition, Manitoba Hydro exports electricity to electric utilities and marketers in the mid-western United States, Ontario, and Saskatchewan. In 2002, Winnipeg Hydro was purchased from the City of Winnipeg. Records were broken for historical peak demand for electricity (24 February 2003) and natural gas (22 January 2003). A study of wind power generation was launched, with seven sites being monitored. A Power Smart program focusing on geothermal heat pump systems also offered assistance to Manitoba homeowners. Successful conversion of the Selkirk Generating Station from coal to natural gas was achieved. In Brandon, a 260 mega watt (MW) natural gas combustion turbine plant was opened. Over $29 million in loans were issued to customers under the Home Comfort and Energy Savings Program. Electricity rates for residential customers remained unchanged, as did those for large industrial customers. Approval was received by the National Energy Board to export 500 MW of electricity to Northern States Power. A new international interconnection was brought into service in November 2002 between Glenboro, Manitoba and Harvey, North Dakota. The ISO 14001 international certification for environmental management systems was awarded to Manitoba Hydro. tabs., figs

  11. Hydro to market green power at special prices

    International Nuclear Information System (INIS)

    McArthur, D.; Salaff, S.

    1996-01-01

    A 600 kW grid-connected demonstration wind turbine at Ontario Place will provide green power to Toronto residents early in 1997. The joint venture project partners include publicly owned Ontario Hydro, Toronto Hydro and Natural Resources Canada. The power will be sold at a premium under arrangements yet to be announced. The green power pricing initiative would allow some customers to buy their electricity at a green price. The project could be a self-financing model for future renewable energy development. The Ontario Place turbine project will determine whether Toronto electricity customers want green power or electricity from nuclear and fossil stations, and could determine which type of generation should be built in the future

  12. Energy generated for you : Newfoundland and Labrador Hydro 2003 annual report

    International Nuclear Information System (INIS)

    2004-01-01

    This report provides a consolidated review of the operations of Newfoundland and Labrador Hydro (Hydro) with focus on energy production, energy sales, and environmental commitment. The utility, a Crown Corporation owned by the Province of Newfoundland and Labrador, generates, transmits and distributes electricity to utility, industrial and residential customers. It is the parent company of the Hydro Group of Companies which includes Newfoundland and Labrador Hydro, Churchill Falls Corp. Ltd., Lower Churchill Development Corp. Ltd., Gull Island Power Co. Ltd., and Twin Falls Power Co. Ltd.. The installed generating capacity of the Hydro Group of Companies is the fourth largest in Canada. The generating assets include 10 operating hydroelectric plants, 1 oil-fired plant, 4 gas turbines, 28 diesel plants, and the Churchill Falls Hydroelectric generating station. The utility also maintains 4,800 km of transmission lines and more than 3,600 km of lower voltage distribution lines. The utility is isolated from the North American grid. Energy sales in 2003 were one per cent above 2002. The Holyrood thermal generating station had a gross production of 2061 GWh in 2003, an 18 per cent reduction from 2002. The 40 MW Granite Canal Hydroelectric generating station was completed in 2003. The utility also purchased electricity from Corner Brook Pulp and Paper and the Exploits River Partnership in order to meet the demand for capacity and energy on the island. The Hydro Group's net income decreased by 24 per cent in 2003, while there was a 3 per cent increase in revenue. Earnings are expected to be higher in 2004 due to a projected increase in rates. This annual report presented the company's financial performance, executive changes, rural rate inquiry, and reorganization. Financial statements included a thorough review and analysis of financial transactions, the auditor's report, and the customary notes to the consolidated financial statement including balance sheets, assets

  13. Report on the renewal of the hydro-electric concessions

    International Nuclear Information System (INIS)

    2006-11-01

    The administrative procedures of the renewable of the hydro-electric concessions in France is a real problem, leading to too long time of the case files examination. This mission aimed to identify the technical and financial criteria on which the decision maker will base his choice to give the concessions renewal. This report exposes the evaluation and the recommendations of the mission. The first part establishes an evaluation of the situation of the hydro-electric concessions and the today renewal procedures. The second part presents a analysis of this situation and the recommendations. The last part brings the conclusions. (A.L.B.)

  14. The development of small-hydro in China; Le developpement de la petite hydraulique en Chine

    Energy Technology Data Exchange (ETDEWEB)

    Zhu, X. [United Nations Environment Programme, Riso (Denmark); Pan, J. [Chinese Academy of Social Sciences (China). Research Centre for Economic Development

    2007-04-15

    Small hydro is a renewable source of energy that is economically and technically viable. This article described China's investment in small-scale hydroelectric power plants in 1,600 remote communities. Seventy per cent of China's small hydro power stations are concentrated in remote impoverished communities. These power stations provide electricity to 300 million people in China, where half of the territories, one third of the districts and towns, and one quarter of the population depend primarily on this energy source for their electricity needs. The first power station was built in the province of Yunnan in 1912, but the real development of small hydro occurred after 1950, and can be divided into three phases. Phase 1 occurred before 1980 when small hydro power stations concentrated on providing electricity for lighting in rural areas as well as for transforming agriculture and irrigation. For many decades following the foundation of the Republic of China, rural areas did not have access to electricity or had serious shortages of electricity. In order to ensure electricity in isolated and remote areas, the Chinese government requested that local authorities build and exploit small hydro where conditions were favourable, and this while respecting water resources. Phase 2 occurred between 1980s and 1990s, with a focus on improving the performance of small hydro power stations to include electricity provisions for local enterprises. During phase 2, small hydro became a tool for dynamic rural development for farmers to increase their revenues. The latest phase in small hydro development has also helped reduce poverty and develop local economies, but in addition, it plays a role in the long term protection of ecosystems, the environment and rural modernization. Today 660,000 people work for small power stations and most are employed locally. Replacing firewood with electricity has saved 130,000 hectares of forested land and helped protect ecosystems. Small

  15. Hydro energetic inventory study from Chapecozinho river

    International Nuclear Information System (INIS)

    Pimenta, S.C.; Sureck, M.A.A.; Nascimento, P.R.; Kawasaki, M.; Silva Felipe, R. da.

    1990-01-01

    The Hydro energetic Inventory Study in Chapecozinho River Basin, Brazil is described, comparing the proposed results in 1979 with the actual review in 1989. An analysis for solution the socio-economic and environment problems is also presented. (author)

  16. Stochastic dynamic programming optimization of BC Hydro's system under market and hydrologic uncertainties

    Energy Technology Data Exchange (ETDEWEB)

    Druce, D. [British Columbia Hydro, Vancouver, BC (Canada)

    2004-07-01

    BC Hydro's installed generation capacity as of March 31, 2003 was 11,103 MW, of which 90 per cent was hydro power, 9 per cent was gas-fired and 1 per cent was non-integrated. The hydroelectric plants belong to one of three groups, the Peace River, Columbia River or small hydro which includes small to moderate sized-plants. Small hydro is controlled by hydrologic regime and storage limitations rather than by system requirements. The installed capacity for the 4 plants on the Columbia River totals 4,722 MW. The installed capacity at the 2 plants on the Peace River totals 3,424 MW. Both watersheds are subject to interior climate conditions with significant inflows from snowmelt and rainfall runoff. This presentation addressed the issue of mid-term hydro scheduling and its impact on markets. For the past 15 years, BC Hydro has used the marginal cost model for electricity trade and for operations planning. The model considers system loads and resources, and maximizes the expected net revenue over a planning horizon of 6 years. A marginal value of water stored in the Williston Reservoir has been established using the marginal cost model. The affect of weather, natural gas prices and water supply on hydro generation was also discussed. It was noted that information on spot market electricity prices has significantly improved since the electric power industry was deregulated in 1996. tabs., figs.

  17. Hydro power plants, an overview of the current types and technology

    OpenAIRE

    Tkáč Štefan

    2018-01-01

    Despite the long history of hydropower technology and rising number of system harvesting energy from alternative sources, the constant research within hydro power sector becoming increasingly important as the power from water was and still is the leading alternative source of green energy generation, capitalized not necessarily within micro-urban structures only. The advantages of hydro systems involve their relatively low acquisition cost against durability, the possibility of gaining energy...

  18. Emerging Market Attractiveness Index for hydro IPPs

    OpenAIRE

    Weaver, Tyson John

    2013-01-01

    This article addresses two primary commercial themes that affect the future development of the industry. 1. What are the most attractive future emerging markets for hydropower? 2. What parameters are utilized by international hydro IPPs to determine market attractiveness?

  19. Recent experience of IFFM PAS in the design process of lowhead propeller hydraulic turbines for Small Hydro

    International Nuclear Information System (INIS)

    Kaniecki, M; Krzemianowski, Z

    2010-01-01

    The paper contains the short description of the design process of the axial flow turbines for Small Hydro. The crucial elements of the process are: ARDES programme for 1D inverse problem (containing the statistic information of the well performed hydraulic units, applying the lifting aerofoil theory); determination of universal hill diagram and optimization of the runner blades geometry by utilization of the 3D CFD codes. As the result of design process with utilization of both design steps, the generated runner blades geometry (1D inverse problem) and some computational results of 3D CFD solver have been presented. As the conclusion some crucial remarks of the designed process have been brought forward.

  20. Ultrasonic inspection experience of steam generator tubes at Ontario Hydro and the TRUSTIE inspection system

    International Nuclear Information System (INIS)

    Choi, E.I.; Jansen, D.

    1998-01-01

    Ontario Hydro have been using ultrasonic test (UT) technique to inspect steam generator (SG) tubes since 1993. The UT technique has higher sensitivity in detecting flaws in SG tubes and can characterize the flaws with higher accuracy. Although an outside contractor was used initially, Ontario Hydro has been using a self-developed system since 1995. The TRUSTIE system (Tiny Rotating UltraSonic Tube Inspection Equipment) was developed by Ontario Hydro Technologies specifically for 12.7 mm outside diameter (OD) tubes, and later expanded to larger tubes. To date TRUSTIE has been used in all of Ontario Hydro's nuclear generating stations inspecting for flaws such as pitting, denting, and cracks at top-of-tubesheet to the U-bend region. (author)

  1. Opening new horizons, building new synergies : 1998 annual report of Hydro-Quebec International

    International Nuclear Information System (INIS)

    1999-01-01

    Hydro-Quebec International (HQI) was established in 1978 as a wholly owned subsidiary of Hydro-Quebec. Its mission is to contribute to Hydro-Quebec's growth and profitability by investing in energy partnerships and by selling Hydro-Quebec expertise internationally. This annual report presents highlights of the company's operations, balance sheet, financial position, and investments. 1998 proved to be a year of market development and prospecting which yielded promising results. The expanded scope of the company that now includes investment and infrastructure construction was already generating $ 26 million in economic spinoff for Quebec. The report highlights HQI's involvement in Europe, the Middle East, Africa, and Asia. Great strides have been made also in ensuring the most rigorous practices possible to assess and manage risk and to bolster the company's ability to take unforeseen events in stride. On the investment side, in 1998, the first year of its involvement as an investor, HQI initiated investments amounting to $137 million. Plans are to double that figure in 1999. tabs., figs

  2. Thermo-hydro-mechanical behavior of fractured rock mass

    International Nuclear Information System (INIS)

    Coste, F.

    1997-12-01

    The purpose of this research is to model Thermo-Hydro-Mechanical behavior of fractured rock mass regarding a nuclear waste re-depository. For this, a methodology of modeling was proposed and was applied to a real underground site (EDF site at Nouvelle Romanche). This methodology consists, in a first step, to determine hydraulic and mechanical REV. Beyond the greatest of these REV, development of a finite element code allows to model all the fractures in an explicit manner. The homogenized mechanical properties are determined in drained and undrained boundary conditions by simulating triaxial tests that represent rock mass subject to loading. These simulations allow to study the evolution of hydraulic and mechanical properties as a function of stress state. Drained and undrained boundary conditions enable to discuss the validity of assimilation of a fractured rock mass to a porous medium. The simulations lead to a better understanding of the behavior of the fractured rock masses and allow to show the dominant role of the shear behavior of the fractures on the hydraulic and mechanical homogenized properties. From a thermal point of view, as long as conduction is dominant, thermal properties of the rock mass are almost the same as those the intact rock. (author)

  3. 77 FR 55212 - North Star Hydro Services CA, LLC; Notice of Preliminary Permit Application Accepted for Filing...

    Science.gov (United States)

    2012-09-07

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project No. 14379-000] North Star Hydro..., Motions To Intervene, and Competing Applications On March 30, 2012, North Star Hydro Services CA, LLC... approximately 3.8 gigawatthours. Applicant Contact: David Holland, North Star Hydro Services CA, LLC, 1110 West...

  4. Therapeutic efficacy of hydro-kinesiotherapy Programs in lumbar spondylosis

    Directory of Open Access Journals (Sweden)

    Ana-Maria BOTEZAN

    2015-12-01

    Full Text Available Lumbar spondylarthrosis is a degenerative disease that affects the joint structures of the lumbar spine. In the course of time, numerous studies on the role of hydro-kinesiotherapy in the treatment of lumbar spondylosis have been conducted. The aim of this research is motivated by the significantly high number of patients with chronic pain in the lumbar spine due to lumbar spondylosis, as well as by the negative impact on their quality of life through the impairment of the activities of daily living. The prospective longitudinal study was carried out at the Clinical Rehabilitation Hospital Cluj-Napoca. The study included 35 patients with chronic low back pain and mobility limitation in the lumbar spine. The patients were assigned to two groups: the study group formed by 20 patients and the control group consisting of 15 patients aged between 40-70 years. The treatment of the patients included in the study was performed over a two week period and consisted of a hydro-kinesiotherapy program, for the patients of the study group, the duration of a treatment session being 40 minutes. Both the subjects of the study group and of the control group also benefited from sedative massage of the lumbosacral spine, kinesiotherapy, laser therapy of the lumbar spine. The patients were evaluated using Schober’s test, the Visual Analogue Scale, the Oswestry index. These evaluation methods were applied to the patients of both groups at the beginning of the rehabilitation programs and after two weeks. The results of the study demonstrated the therapeutic efficacy of the medical rehabilitation programs that included hydro-kinesiotherapy programs. The patients of both groups had improvements through a decrease of lumbar pain, an increase in lumbar spine mobility, as well as in the patients’ ability to organize themselves in the activities of daily living. However, the patients of the study group, with a hydro-kinesiotherapy program performed for two weeks, had

  5. Hydro operational restrictions forum: Licensee workshop summary. Final report

    International Nuclear Information System (INIS)

    Ebrahim, S.; Monahan, C.K.; Pistor, B.; West, A.

    1998-08-01

    In spite of producing no atmospheric pollutants, hydroelectric power plants often go unrecognized as a unique provider of clean, efficient, low-cost energy. A concerted effort is needed to ensure that these attributes are fully accounted for when considering the uses and benefits of available water resources. Relicensing reviews and other regulatory activities associated with continued operation of hydro generation projects have drawn increased attention to hydro resources. This attention has typically resulted in imposition of conditions having a substantial cost impact without, necessarily, reflecting a full appreciation of the resource's benefits and attributes. With the extensive countrywide effort in relicensing and regulation, there is an opportunity to collect and compile lessons learned. This is particularly true with respect to preferred practices, technologies, and techniques applicable to required studies and mitigation measures. Such compilation will enable the industry and related stakeholders to improve quality and effectiveness while reducing costs of relicensing and mitigation for continued hydro operations. As a technology leader for the industry, EPRI is in a unique position to identify and document these techniques and practices. This report comprises the proceedings of the hydro licensees workshop. Fifteen licensee representatives with recent or current involvement in the relicensing process gathered at this workshop and shared their experiences, both good and bad. Support was strong among attendees for EPRI's effort to collect and compile these, along with the experiences of others, into a guidebook of accepted practices. Initial workshop findings were used in the second workshop to solicit buy-in from agencies and NGOs to the need for--as well as proposed scope of--a compendium of preferred practices

  6. Transfer Hydro-dehalogenation of Organic Halides Catalyzed by Ruthenium(II) Complex.

    Science.gov (United States)

    You, Tingjie; Wang, Zhenrong; Chen, Jiajia; Xia, Yuanzhi

    2017-02-03

    A simple and efficient Ru(II)-catalyzed transfer hydro-dehalogenation of organic halides using 2-propanol solvent as the hydride source was reported. This methodology is applicable for hydro-dehalogenation of a variety of aromatic halides and α-haloesters and amides without additional ligand, and quantitative yields were achieved in many cases. The potential synthetic application of this method was demonstrated by efficient gram-scale transformation with catalyst loading as low as 0.5 mol %.

  7. Market Power in Hydro-Thermal Supply

    International Nuclear Information System (INIS)

    Edin, Karl-Axel

    2006-12-01

    Despite having had a deregulated electricity market in Sweden for over ten years we still need to increase our understanding as to how deregulated electricity markets actually work and how possible problems are to be solved. One question that is always in focus is if the competition between generators in the Nordic electricity market really works the way it was intended. Many argue that the concentration in ownership of generation plants already has gone too far. Together with joint ownership in nuclear facilities and barriers for entrance, critics say that this has resulted in higher electricity prices than necessary. In this report different methods to (ex ante) study potential possibilities for generating firms to influence the electricity price (market power) and (ex post) discover possible manipulation through analysing the spot price and other observed factors on the electricity market are analysed. The purpose of the longer underlying paper is to give a comprehensive treatment of the electricity market with storage, i.e. hydro power, with an auction market organisation and to test the models on the Nordic market in order to explore the explanatory power of auction market theory and the theory of contestable market. The main theoretical effort in the paper concerns auction theory with inventories. The paper develops an inter-temporal auction model of a thermal-hydro power market. Parallel to the derivation of the basic equations a numerical model is developed in order to illustrate the results of the model. Section 2 of the present paper summarizes the basic equations (derived in the longer paper) for an inter-temporal auction thermal-hydro market. Section 3 contains the illustrations of solutions to equations for some stylized markets. In section 4 the auction model is tested on the Nordic market

  8. Development of a numerical code for the prediction of the long-term behavior of the underground facilities for the high-level radioactive waste disposal

    International Nuclear Information System (INIS)

    Sawada, Masataka; Okada, Tetsuji; Hasegawa, Takuma

    2006-01-01

    Complicated phenomena originated by thermo-hydro-mechanical coupling behavior will occur in the near-field of geological disposal of nuclear waste. Development of a numerical evaluation method for such phenomena is important in order to make a reasonable repository design and a safety assessment. In order to achieve the objective above, a numerical model using the equations which can evaluate the swelling characteristics of buffer materials based on the diffusive double layer theory is proposed, and a numerical scheme for the thermo-hydro-mechanical coupled analysis including the swelling model is constructed. The proposed swelling model can reproduce the behavior observed during both swelling pressure tests and swelling deformation tests. When the developed numerical code is applied to the laboratory heater test using a bentonite specimen, it can reproduce the thermal gradient, the distribution of saturation rate and the variation of porosity. The developed numerical code will be applied to well-controlled laboratory tests and full-scale in-situ tests in the future work. In order to apply to the various geochemical conditions around the engineered barrier, chemical component will be coupled to the present numerical code. (author)

  9. Implications of the Bangor Hydro decision on FERC relicensings

    Science.gov (United States)

    Pizzi, L.

    1997-01-01

    In the next 15 years, over 400 existing nonfederal dams will require new licenses by the Federal Energy Regulatory Commission (FERC) in order to continue operations. In many cases, state or federal agencies have a unique opportunity to condition the hydropower licenses to protect environmental values. In 1996, the Court of Appeals for the District of Columbia Circuit issued an opinion striking down a mandatory license condition imposed by the U.S. Department of the Interior in a FERC relicensing. The case, Bangor Hydro-Electric Company v.Federal Energy Regulatory Commission, is instructive for agencies regarding the procedures to be followed in imposing mandatory FERC licensing conditions in the future. After Bangor Hydro, agencies should: (1) support their decisions by substantial evidence in the FERC record, (2) request applicant studies to support agency decisions and allow public comment on the decisions as a means to test the facts and analysis, and (3) consider intervening in a case to defend the condition on appeal. Bangor Hydro also raises, but does not decide, the issue of whether the agency imposing the mandatory condition should engage in balancing the economics of the hydropower project with the public resources affected by the project.

  10. In the spotlight: New hydro development in North America

    International Nuclear Information System (INIS)

    Barnes, M.J.

    1993-01-01

    1992 was a year of progress for many segments of the hydropower industry as developers worked to bring new projects on line. This industry overview features several of these projects and offers a preview of 1993 activity. The only operating privately owned hydroelectric project in Texas. The largest hydro plant in the province of Manitoba. The world's largest submersible hydroturbine-generator. These projects and others-completed and placed in service in 1992-can claim a special place in the history books. For each of the 31 hydro projects in North America that began operating in 1992, there's a unique story to tell. Each called upon the time, talent, commitment, ingenuity, and perseverance of those involved in their development. In aggregate, these projects contribute nearly 3,800 MW of clean, renewable electrical capacity that can be used efficiently and cost-effectively to help meet the power demands of customers in the US and Canada. Utilities, state agencies, municipalities, and independent power developers played roles in developing new hydro in 1992. We offer a sampling of their work to illustrate progress made in the past year

  11. 77 FR 73651 - North Star Hydro Services, CA LLC; Notice of Preliminary Permit Application Accepted for Filing...

    Science.gov (United States)

    2012-12-11

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project No. 14465-000] North Star Hydro..., Motions To Intervene, and Competing Applications On November 6, 2012, North Star Hydro Services CA, LLC.... Applicant Contact: Mr. David Holland, North Star Hydro Services CA, LLC, 1110 West 131st Street South, Jenks...

  12. 78 FR 77118 - KC Small Hydro, LLC; Notice of Amended Preliminary Permit Application Accepted for Filing and...

    Science.gov (United States)

    2013-12-20

    ..., Motions To Intervene, and Competing Applications On May 28, 2013, KC Scoby Hydro, LLC, filed an... 28, 2013, application and sent an acceptance letter to KC Scoby Hydro, LLC. Subsequently, On October 28, 2013, KC Scoby Hydro, LLC, amended its preliminary permit application to change its name to KC...

  13. 78 FR 54643 - KC Scoby Hydro, LLC; Notice of Preliminary Permit Application Accepted for Filing and Soliciting...

    Science.gov (United States)

    2013-09-05

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project No. 14526-000] KC Scoby Hydro... Intervene, and Competing Applications On May 28, 2013, KC Scoby Hydro, LLC, filed an application for a... Contact: Kelly Sackheim, KC Scoby Hydro, LLC, 5096 Cocoa Palm Way, Fair Oaks, CA 95628; phone: (301) 401...

  14. Ontario Hydro's plan for used nuclear fuel

    International Nuclear Information System (INIS)

    Stevens-Guille, P.D.; Howes, H.A.; Freire-Canosa, J.

    1992-01-01

    A comprehensive plan for the management of used nuclear fuel has been published by Ontario Hydro. In this paper current practices are discussed and actions leading to disposal in a repository are outlined. Extended storage options are discussed should disposal be delayed

  15. iTree-Hydro: Snow hydrology update for the urban forest hydrology model

    Science.gov (United States)

    Yang Yang; Theodore A. Endreny; David J. Nowak

    2011-01-01

    This article presents snow hydrology updates made to iTree-Hydro, previously called the Urban Forest Effects—Hydrology model. iTree-Hydro Version 1 was a warm climate model developed by the USDA Forest Service to provide a process-based planning tool with robust water quantity and quality predictions given data limitations common to most urban areas. Cold climate...

  16. B.C. Hydro drops Duke Point

    International Nuclear Information System (INIS)

    Anon.

    2005-01-01

    The abandonment of the proposed natural gas-fired Duke Point Power Project on Vancouver Island was discussed. It was suggested that the continuing appeal process increases the risk that the plant will not be built in time. The news followed a decision by the British Columbia (BC) Court of Appeal to hear an appeal of the project by a number of intervenors. Over $170 million has been spent on the project to date. The decision will impact the BC treasury, as the amount is being deducted from the dividends that BC Hydro would have paid to the government. A coalition of individuals and environmental groups, as well as local industry, are opposed to the plant on the basis of increased greenhouse (GHG) emissions and higher natural gas prices. The project would have required a natural gas pipeline to be built under Georgia Strait. The project was thought necessary due to the deteriorating condition of high voltage direct current cables running under the strait. BC Hydro's fallback plan for the island is load reduction. A new transmission line is also planned

  17. Liquid assets: factors contributing to the development of small hydro in China

    International Nuclear Information System (INIS)

    Pan, D.

    2006-01-01

    The rapid growth of small hydro capacity in China is reviewed. At present, the annual generation from rural small hydropower in China equates with the saving of 44 million tonnes of coal, or the emission of 110 million tonnes of carbon dioxide. Other environmental advantages such as a reduction in wood burning, reduced logging and therefore reduced soil erosion, are mentioned. Energy-starved China stood to gain much from the development of small hydro systems and government policy has been supportive in terms of relatively low tax rates and low interest loans. It is expected that due to the rapid economic growth in China, small-scale hydro will maintain its present level of development and continue to be promoted in a sound and rational manner. (author)

  18. Analysis of Axial Turbine Pico-Hydro Electrical Power Plant in North Sulawesi Indonesia

    Science.gov (United States)

    Sangari, F. J.; Rompas, P. T. D.

    2018-02-01

    This study presents analysis of pico-hydro electrical power plant in North Sulawesi, Indonesia. The objective of this study is to get a design of axial turbine pico-hydro electrical power plant. The method used the study of literature, survey the construction site of the power plant and the characteristics of the location being a place of study, analysis of hydropower ability and analyzing costs of power plant. The result showed that the design of axial turbine pico-hydro installation is connected to a generator to produce electrical energy maximum can be used for household needs in villages. This analyze will be propose to local government of Minahasa, North Sulawesi, Indonesia.

  19. 76 FR 67174 - Arkansas Electric Cooperative Corp., Riverbank Hydro No. 9 LLC, Solia 3 Hydroelectric LLC, Lock...

    Science.gov (United States)

    2011-10-31

    ...; 14166-000; 14180-000; 14193-000] Arkansas Electric Cooperative Corp., Riverbank Hydro No. 9 LLC, Solia 3... May 2, 2011, Arkansas Electric Cooperative Corp. (Arkansas Electric), Riverbank Hydro No. 9 LLC.... Krouse, Hydro Green Energy, 5090 Richmond Avenue 390, Houston, TX 77056. (877) 556-6566 x 709. FFP 2's...

  20. Demystification and localization in the adoption of micro-hydro technology : Insights from India

    NARCIS (Netherlands)

    Höffken, J.I.

    2016-01-01

    The phrase ‘small is beautiful’ holds true for the micro-hydro plants discussed in this article. Micro-hydro plants can convert the energy of falling water into electricity. In India, access to electricity cannot be taken for granted, especially in rural areas, which do not yet have grid extension

  1. Large scale hydro-economic modelling for policy support

    Science.gov (United States)

    de Roo, Ad; Burek, Peter; Bouraoui, Faycal; Reynaud, Arnaud; Udias, Angel; Pistocchi, Alberto; Lanzanova, Denis; Trichakis, Ioannis; Beck, Hylke; Bernhard, Jeroen

    2014-05-01

    To support European Union water policy making and policy monitoring, a hydro-economic modelling environment has been developed to assess optimum combinations of water retention measures, water savings measures, and nutrient reduction measures for continental Europe. This modelling environment consists of linking the agricultural CAPRI model, the LUMP land use model, the LISFLOOD water quantity model, the EPIC water quality model, the LISQUAL combined water quantity, quality and hydro-economic model, and a multi-criteria optimisation routine. With this modelling environment, river basin scale simulations are carried out to assess the effects of water-retention measures, water-saving measures, and nutrient-reduction measures on several hydro-chemical indicators, such as the Water Exploitation Index (WEI), Nitrate and Phosphate concentrations in rivers, the 50-year return period river discharge as an indicator for flooding, and economic losses due to water scarcity for the agricultural sector, the manufacturing-industry sector, the energy-production sector and the domestic sector, as well as the economic loss due to flood damage. Recently, this model environment is being extended with a groundwater model to evaluate the effects of measures on the average groundwater table and available resources. Also, water allocation rules are addressed, while having environmental flow included as a minimum requirement for the environment. Economic functions are currently being updated as well. Recent development and examples will be shown and discussed, as well as open challenges.

  2. The study of polymeric hydro-gels with unique properties obtained by polymerization with gamma radiation processing

    International Nuclear Information System (INIS)

    Dragusin, M.

    1995-01-01

    This thesis presents the work carried out on polymeric hydro-gels obtained by radiation processing using 60 Co gamma rays from the irradiation facility IETI-10.000 (10 k Ci), and on the polymeric hydro-gels obtained by irradiation with the electron beams from a linear accelerator (6 MeV). The aim of the study was to determine the effect of the rate dose and total dose absorbed in the materials. There are presented the preparation methods of homo- and co-polymer hydro-gels (acrylics, namely anionic and neutral monomers (acrylamide, acrylic acid, vinyl acetate) and cationic monomers (di-methyl di-allyl ammonium chloride)) such as floculants, additives, absorbers, etc. Concerning with these we have analysed the preparation methods, the mechanical, thermal, diffusivity, and swelling properties of polymeric hydro-gels in a large variety of gels of type I or II. The technological aspects and end use were studied in connection with the characteristics of the radiation processing of these hydro-gels as a function of chemical composition rate and absorbed dose, swelling degree (low and very high hydro-soluble), mechanical and diffusional properties. (author) 33 figs., 12 tabs., 101 refs

  3. Post-acquisition integration of employees : a case study of Norsk Hydro

    OpenAIRE

    Winsjansen, Elisabeth; Wright, Harriet

    2013-01-01

    This study explores and investigates the integration of employees after a cross-border acquisition has been signed and closed. An exploratory study of Norsk Hydro has been conducted using a qualitative research design, with five in-depth interviews of employees from Norsk Hydro and from the organization’s divisions in Germany and Brazil. The number of cross-border acquisitions have increased in the past decades as a way of companies to renew their competitive positions in the g...

  4. 76 FR 44323 - National Grid Transmission Services Corporation; Bangor Hydro Electric Company; Notice of...

    Science.gov (United States)

    2011-07-25

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Docket No. EL11-49-000] National Grid Transmission Services Corporation; Bangor Hydro Electric Company; Notice of Petition for Declaratory Order Take..., 18 CFR 385.207, National Grid Transmission Services Corporation and Bangor Hydro Electric Company...

  5. A case study of small hydro and grid extension for rural electrification alternatives and complementarities

    International Nuclear Information System (INIS)

    Tebicke, H.L.; Mariam, H.G.

    1990-01-01

    This paper reports that rural electrification in Eastern and Southern African Countries (ESAC) has so far been based largely on stand-alone diesel electric generating plant or on the extension of high-voltage transmission grids fed by large hydro and/or thermal electric generating stations. The alternative of furnishing supply at modest investment and competitive cost from a nearby small- hydro plant has rarely been considered in those countries of the sub-region that have ample hydro-power resources. All countries in the sub-region (except Angola) import petroleum and/or petroleum product supplies, as well as all hardware for electricity supply and utilization. As a result, in most countries an acute shortage of foreign exchange severely hampers implementation of rural electrification schemes. This should turn attention increasingly to strategies which are less capital-intensive and less dependent on foreign exchange, such as small-hydro plants, where the resource is located near to rural demand. Increasing the local content of small-hydro project implementation has paid off in recent years, considerably reducing costs in a number of Asian and Latin American projects. Local contributions have taken the form of resource assessment at a particular site, design, construction works, and fabrication of relatively simple components of power plant such as hydraulic equipment, low pressure penstocks and gates, as well as simpler types of turbines (e.g., the Banki type). Inadequacy of indigenous technical capacity to make similar local contributions in the ESAC has meant that the few recent small-hydro projects have relied on importing both expertise and equipment. The high costs resulting have frequently fueled arguments against pursuit of small-hydro projects

  6. Chalifoux Dairy and Hydro-Quebec, partners in innovation; Laiterie Chalifoux et Hydro-Quebec, partenaires dans l`innovation des entreprises quebecoises

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1996-12-31

    Recently, Chalifoux Dairy of Sorel, Quebec, invested, with the help of Hydro-Quebec, in three new technologies to increase the energy efficiency of the production line. A summary of these technological improvements was presented. The three new technologies were induction heating pasteurization, ultraviolet sterilization and ultrafiltration. Ultra-high temperature (UHT) induction heating is now used to pasteurize cream and chocolate milk. This new pasteurization method has reduced product returns from 5 per cent to nil. UHT cream is packaged in small disposable containers that are previously sterilized by a radiant ultraviolet source. An ultrafiltration method also has been implemented for production of specialty cheese at the dairy. This process yields 20 per cent more production with 30 per cent less energy than traditional methods. Hydro-Quebec assisted Chalifoux Dairy with a subsidy of $596,000 for these energy-efficiency modifications.

  7. Restoring coastal wetlands that were ditched for mosquito control: a preliminary assessment of hydro-leveling as a restoration technique

    Science.gov (United States)

    Smith, Thomas J.; Tiling, Ginger; Leasure, Pamela S.

    2007-01-01

    The wetlands surrounding Tampa Bay, Florida were extensively ditched for mosquito control in the 1950s. Spoil from ditch construction was placed adjacent to the wetlands ditches creating mound-like features (spoil-mounds). These mounds represent a loss of 14% of the wetland area in Tampa Bay. Spoil mounds interfere with tidal flow and are locations for non-native plants to colonize (e.g., Schinus terebinthifolius). Removal of the spoil mounds to eliminate exotic plants, restore native vegetation, and re-establish natural hydrology is a restoration priority for environmental managers. Hydro-leveling, a new technique, was tested in a mangrove forest restoration project in 2004. Hydro-leveling uses a high pressure stream of water to wash sediment from the spoil mound into the adjacent wetland and ditch. To assess the effectiveness of this technique, we conducted vegetation surveys in areas that were hydro-leveled and in non-hydro-leveled areas 3 years post-project. Adult Schinus were reduced but not eliminated from hydro-leveled mounds. Schinus seedlings however were absent from hydro-leveled sites. Colonization by native species was sparse. Mangrove seedlings were essentially absent (≈2 m−2) from the centers of hydro-leveled mounds and were in low density on their edges (17 m−2) in comparison to surrounding mangrove forests (105 m−2). Hydro-leveling resulted in mortality of mangroves adjacent to the mounds being leveled. This was probably caused by burial of pneumatophores during the hydro-leveling process. For hydro-leveling to be a useful and successful restoration technique several requirements must be met. Spoil mounds must be lowered to the level of the surrounding wetlands. Spoil must be distributed further into the adjacent wetland to prevent burial of nearby native vegetation. Finally, native species may need to be planted on hydro-leveled areas to speed up the re-vegetation process.

  8. HydroDesktop: An Open Source GIS-Based Platform for Hydrologic Data Discovery, Visualization, and Analysis

    Science.gov (United States)

    Ames, D. P.; Kadlec, J.; Cao, Y.; Grover, D.; Horsburgh, J. S.; Whiteaker, T.; Goodall, J. L.; Valentine, D. W.

    2010-12-01

    A growing number of hydrologic information servers are being deployed by government agencies, university networks, and individual researchers using the Consortium of Universities for the Advancement of Hydrologic Science, Inc. (CUAHSI) Hydrologic Information System (HIS). The CUAHSI HIS Project has developed a standard software stack, called HydroServer, for publishing hydrologic observations data. It includes the Observations Data Model (ODM) database and Water Data Service web services, which together enable publication of data on the Internet in a standard format called Water Markup Language (WaterML). Metadata describing available datasets hosted on these servers is compiled within a central metadata catalog called HIS Central at the San Diego Supercomputer Center and is searchable through a set of predefined web services based queries. Together, these servers and central catalog service comprise a federated HIS of a scale and comprehensiveness never previously available. This presentation will briefly review/introduce the CUAHSI HIS system with special focus on a new HIS software tool called "HydroDesktop" and the open source software development web portal, www.HydroDesktop.org, which supports community development and maintenance of the software. HydroDesktop is a client-side, desktop software application that acts as a search and discovery tool for exploring the distributed network of HydroServers, downloading specific data series, visualizing and summarizing data series and exporting these to formats needed for analysis by external software. HydroDesktop is based on the open source DotSpatial GIS developer toolkit which provides it with map-based data interaction and visualization, and a plug-in interface that can be used by third party developers and researchers to easily extend the software using Microsoft .NET programming languages. HydroDesktop plug-ins that are presently available or currently under development within the project and by third party

  9. 75 FR 18191 - City of Raleigh; Community Hydro, LLC; Notice of Competing Preliminary Permit Applications...

    Science.gov (United States)

    2010-04-09

    ...: Mr. Thomas A. McCormick, Raleigh City Attorney, P.O. Box 590, Raleigh, North Carolina 27601, e-mail tom.mccormick@ci.raleigh.nc.us . For Community Hydro, LLC: Lori Barg, Community Hydro, LLC, 113...

  10. Revisiting Renewable Energy Map in Indonesia: Seasonal Hydro and Solar Energy Potential for Rural Off-Grid Electrification (Provincial Level

    Directory of Open Access Journals (Sweden)

    Agung Wahyuono Ruri

    2018-01-01

    Full Text Available Regarding the acceleration of renewable energy diffusion in Indonesia as well as achieving the national energy mix target, renewable energy map is essential to provide useful information to build renewable energy system. This work aims at updating the renewable energy potential map, i.e. hydro and solar energy potential, with a revised model based on the global climate data. The renewable energy map is intended to assist the design off-grid system by hydropower plant or photovoltaic system, particularly for rural electrification. Specifically, the hydro energy map enables the stakeholders to determine the suitable on-site hydro energy technology (from pico-hydro, micro-hydro, mini-hydro to large hydropower plant. Meanwhile, the solar energy map depicts not only seasonal solar energy potential but also estimated energy output from photovoltaic system.

  11. Scheduling of a hydro producer considering head-dependency, price scenarios and risk-aversion

    International Nuclear Information System (INIS)

    Pousinho, H.M.I.; Mendes, V.M.F.; Catalão, J.P.S.

    2012-01-01

    Highlights: ► A MIQP approach is proposed for the short-term hydro scheduling problem. ► Head-dependency, discontinuous operating regions and discharge ramping constraints are considered. ► As new contribution to earlier studies, market uncertainty is introduced in the model via price scenarios. ► Also, risk aversion is incorporated by limiting the volatility of the expected profit through CVaR. ► A case study based on one of the main Portuguese cascaded hydro systems is provided. - Abstract: In this paper, a mixed-integer quadratic programming approach is proposed for the short-term hydro scheduling problem, considering head-dependency, discontinuous operating regions and discharge ramping constraints. As new contributions to earlier studies, market uncertainty is introduced in the model via price scenarios, and risk aversion is also incorporated by limiting the volatility of the expected profit through the conditional value-at-risk. Our approach has been applied successfully to solve a case study based on one of the main Portuguese cascaded hydro systems, requiring a negligible computational time.

  12. Long-term generation scheduling of Xiluodu and Xiangjiaba cascade hydro plants considering monthly streamflow forecasting error

    International Nuclear Information System (INIS)

    Xie, Mengfei; Zhou, Jianzhong; Li, Chunlong; Zhu, Shuang

    2015-01-01

    Highlights: • Monthly streamflow forecasting error is considered. • An improved parallel progressive optimality algorithm is proposed. • Forecasting dispatching chart is manufactured accompanying with a set of rules. • Applications in Xiluodu and Xiangjiaba cascade hydro plants. - Abstract: Reliable streamflow forecasts are very significant for reservoir operation and hydropower generation. But for monthly streamflow forecasting, the forecasting result is unreliable and it is hard to be utilized, although it has a certain reference value for long-term hydro generation scheduling. Current researches mainly focus on deterministic scheduling, and few of them consider the uncertainties. So this paper considers the forecasting error which exists in monthly streamflow forecasting and proposes a new long-term hydro generation scheduling method called forecasting dispatching chart for Xiluodu and Xiangjiaba cascade hydro plants. First, in order to consider the uncertainties of inflow, Monte Carlo simulation is employed to generate streamflow data according to the forecasting value and error distribution curves. Then the large amount of data obtained by Monte Carlo simulation is used as inputs for long-term hydro generation scheduling model. Because of the large amount of streamflow data, the computation speed of conventional algorithm cannot meet the demand. So an improved parallel progressive optimality algorithm is proposed to solve the long-term hydro generation scheduling problem and a series of solutions are obtained. These solutions constitute an interval set, unlike the unique solution in the traditional deterministic long-term hydro generation scheduling. At last, the confidence intervals of the solutions are calculated and forecasting dispatching chart is proposed as a new method for long-term hydro generation scheduling. A set of rules are proposed corresponding to forecasting dispatching chart. The chart is tested for practical operations and achieves

  13. Financial profile of Hydro-Quebec : 1998-2001

    International Nuclear Information System (INIS)

    1999-01-01

    Hydro-Quebec is a publicly owned company with a single shareholder, the Quebec government. It is ranked among North America's largest distributors of green energy. This report provides financial highlights including revenue, expenditure, net income, total assets, long term debt, shareholder's equity and the financial position of the utility. Operating statistics are also provided. This includes electricity sold both in and out of Quebec, total installed capacity, peak requirements for winter, total number of customer accounts, and the number of permanent employees. Because of the January ice storm, Hydro-Quebec's major priority in 1998 was to reinforce its transmission and distribution system to meet customer expectations. From February to December 1998, about 3,000 km of line were built, rebuilt or consolidated. By 2001, the utility will have looped several of its high-voltage transmission systems. Plans are also underway to build four new high-voltage lines and an interconnection with Ontario, using advanced technologies. tabs., figs

  14. Ontario hydro waste storage concepts and facilities

    International Nuclear Information System (INIS)

    Carter, T.J.; Mentes, G.A.

    1976-01-01

    Ontario Hydro presently operates 2,200 MWe of CANDU heavy water reactors with a further 11,000 MWe under design or construction. The annual quantities of low and medium level solid wastes expected to be produced at these stations are tabulated. In order to manage these wastes, Ontario Hydro established a Radioactive Waste Operations Site within the Bruce Nuclear Power Development located on Lake Huron about 250 km northwest of Toronto. The Waste Operations Site includes a 19-acre Storage Site plus a Radioactive Waste Volume Reduction Facility consisting of an incinerator and waste compactor. Ontario has in use or under construction both in-ground and above-ground storage facilities. In-ground facilities have been used for a number of years while the above-ground facilities are a more recent approach. Water, either in the form of precipitation, surface or subsurface water, presents the greatest concern with respect to confinement integrity and safe waste handling and storage operations

  15. Using project management techniques in hydro-relicensing

    International Nuclear Information System (INIS)

    Dominie, D.; Richard, J.

    1991-01-01

    This paper reports that to answer a pressing need for managing today's complex process and requirements of hydro relicensing, Central Maine Power Company has applied the principles of project management, including the use of computerized scheduling to its hydro relicensing efforts. This approach involves early inter-departmental cooperation in mapping out critical path scheduling by requiring the project team to: Outline the scope of the project in its entirety. Clarify and define components of the project. Quantify and categorize assumptions and dependencies. Identify constraints. The computer-generated schedule of this cooperative planning effort provides a graphic representation of the team's plan and become the focal point for refinements and adjustments necessary to complete an application on time. The use of project management techniques facilities team understanding of the realities and limitations in the relicensing process. These techniques encourage cooperative action, and use a solution-oriented process resulting in a product which can be a useful tool in communicating with resource agencies and regulators

  16. Hydro-plankton characteristics and their relationship with sardine and anchovy distributions on the French shelf of the Bay of Biscay

    Directory of Open Access Journals (Sweden)

    Pierre Petitgas

    2006-06-01

    Full Text Available The spatial pattern in hydro-plankton and fish distributions and their relationship were analysed based on the spring 2000 fisheries acoustic survey. The importance of this survey was that it was a multi-disciplinary platform which collected an extensive set of parameters in the hydro-plankton leading to a potentially finer description of hydro-plankton conditions and fish habitats. More than 50 variables were measured on a grid of stations, in four compartments of the ecosystem: hydrology, nutrients, primary producers and meso-zooplankton. First, a joint analysis of all hydro-plankton compartments was performed using multiple factor analysis (MFA. The method was used to estimate a compromise factorial space common to all compartments in which the stations were grouped by hierarchical clustering. The groups were represented spatially and a strong spatial pattern was evidenced. The fish and their spawned eggs were sampled along transect lines using acoustics and CUFES (continuous underway fish egg samplers. The distribution of the fish and their eggs was analysed in relation to the hydro-plankton groups of stations and difference in fish density across hydro-plankton conditions was tested by a pair-wise multiple comparison procedure. Anchovy was associated with a lesser number of hydro-plankton conditions than sardine. Eggs of both species were also associated with a lesser number of conditions than the fish. Finally, the gain provided by using the extensive set of hydro-plankton parameters for mapping large-scale hydro-plankton conditions was analysed in comparison with the situation in which a small set of parameters was available. The extensive set of parameters allowed more hydro-plankton conditions to be identified but only in the coastal area and not on the shelf. Size fractionated chlorophyll was determinant for tracking river plume hydro-plankton condition. However, the fish did not respond to the variety of the coastal hydro

  17. Proposed Hydro-Quebec development plan, 1990-1992: Horizon 1999

    International Nuclear Information System (INIS)

    1990-01-01

    The supply and demand for electric power in Quebec are reviewed and forecasts of future demand are established, using various scenarios of demographic, economic, and energy development. Options for meeting future demand at Hydro-Quebec are assessed, including the construction of new generation and transmission facilities, rehabilitation of existing facilities, improving electrical energy efficiency, and conservation strategies. These options are considered while applying the principle of sustainable development that respects the environment. In addition, objectives and strategies are presented for improving the quality of service and internal operations. Financial forecasts for Hydro-Quebec are proposed which take into account the forecast changes in the utility's cost and revenue factors and its self-financing requirements. 36 figs., 54 tabs

  18. ANTHEM: a two-dimensional multicomponent self-consistent hydro-electron transport code for laser-matter interaction studies

    International Nuclear Information System (INIS)

    Mason, R.J.

    1982-01-01

    The ANTHEM code for the study of CO 2 -laser-generated transport is outlined. ANTHEM treats the background plasma as coupled Eulerian thermal and ion fluids, and the suprathermal electrons as either a third fluid or a body of evolving collisional PIC particles. The electrons scatter off the ions; the suprathermals drag against the thermal background. Self-consistent E- and B-fields are computed by the Implicit Moment Method. The current status of the code is described. Typical output from ANTHEM is discussed with special application to Augmented-Return-Current CO 2 -laser-driven targets

  19. A Full Hydro- and Morphodynamic Description of Breaker Bar Development

    DEFF Research Database (Denmark)

    Jacobsen, Niels Gjøl

    The present thesis considers a coupled modelling approach for hydro- and morphodynamics in the surf zone, which is based on a solution to the Reynolds Averaged Navier-Stokes (RANS) equations with a Volume of Fluid (VOF) closure for the surf tracking. The basis for the numerical approach is the su......The present thesis considers a coupled modelling approach for hydro- and morphodynamics in the surf zone, which is based on a solution to the Reynolds Averaged Navier-Stokes (RANS) equations with a Volume of Fluid (VOF) closure for the surf tracking. The basis for the numerical approach...

  20. Modelling the economics of combined wind/hydro/diesel power systems

    International Nuclear Information System (INIS)

    Sinha, A.

    1993-01-01

    A model that stimulates the performance and economics of a combined wind/hydro/diesel plant with pumped storage has been developed. It is applied to a hypothetical site to demonstrate how a subset of the cheapest configuration of plant sizes may be identified, illustrating in particular the trade-off between the hydro storage capacity and the wind turbine penetration. It seems that, with the wind and water regimes employed, pumped storage is unlikely to have significant benefits, but may be beneficial in areas without natural inflow, in which case the reservoir is used as a store for excess wind output. (author)

  1. HYDRO-ABRASIVE RESISTANCE AND MECHANICAL PROPERTIES OF CONCRETE WITH ADDED FLY ASH

    OpenAIRE

    Ristić, Nenad; Grdić, Zoran; Topličić-Ćurčić, Gordana

    2015-01-01

    The durability of hydraulic engineering structures mostly depends on the resistance of their concrete surfaces to mechanical abrasion. In this paper, we study the hydro-abrasive resistance and mechanical properties of concrete in which cement is partially replaced with fly ash in various proportions. To evaluate these concretes, we measured their compressive strength, flexural strength, static modulus of elasticity, ultrasound velocity through concrete, and sclerometer rebound. The hydro-abra...

  2. Microfabrication and Test of a Three-Dimensional Polymer Hydro-focusing Unit for Flow Cytometry Applications

    Science.gov (United States)

    Yang, Ren; Feeback, Daniel L.; Wang, Wan-Jun

    2005-01-01

    This paper details a novel three-dimensional (3D) hydro-focusing micro cell sorter for micro flow cytometry applications. The unit was microfabricated by means of SU-8 3D lithography. The 3D microstructure for coaxial sheathing was designed, microfabricated, and tested. Three-dimensional hydrofocusing capability was demonstrated with an experiment to sort labeled tanned sheep erythrocytes (red blood cells). This polymer hydro-focusing microstructure is easily microfabricated and integrated with other polymer microfluidic structures. Keywords: SU-8, three-dimensional hydro-focusing, microfluidic, microchannel, cytometer

  3. The HydroColor App: Above Water Measurements of Remote Sensing Reflectance and Turbidity Using a Smartphone Camera

    Science.gov (United States)

    Leeuw, Thomas; Boss, Emmanuel

    2018-01-01

    HydroColor is a mobile application that utilizes a smartphone’s camera and auxiliary sensors to measure the remote sensing reflectance of natural water bodies. HydroColor uses the smartphone’s digital camera as a three-band radiometer. Users are directed by the application to collect a series of three images. These images are used to calculate the remote sensing reflectance in the red, green, and blue broad wavelength bands. As with satellite measurements, the reflectance can be inverted to estimate the concentration of absorbing and scattering substances in the water, which are predominately composed of suspended sediment, chlorophyll, and dissolved organic matter. This publication describes the measurement method and investigates the precision of HydroColor’s reflectance and turbidity estimates compared to commercial instruments. It is shown that HydroColor can measure the remote sensing reflectance to within 26% of a precision radiometer and turbidity within 24% of a portable turbidimeter. HydroColor distinguishes itself from other water quality camera methods in that its operation is based on radiometric measurements instead of image color. HydroColor is one of the few mobile applications to use a smartphone as a completely objective sensor, as opposed to subjective user observations or color matching using the human eye. This makes HydroColor a powerful tool for crowdsourcing of aquatic optical data. PMID:29337917

  4. The HydroColor App: Above Water Measurements of Remote Sensing Reflectance and Turbidity Using a Smartphone Camera.

    Science.gov (United States)

    Leeuw, Thomas; Boss, Emmanuel

    2018-01-16

    HydroColor is a mobile application that utilizes a smartphone's camera and auxiliary sensors to measure the remote sensing reflectance of natural water bodies. HydroColor uses the smartphone's digital camera as a three-band radiometer. Users are directed by the application to collect a series of three images. These images are used to calculate the remote sensing reflectance in the red, green, and blue broad wavelength bands. As with satellite measurements, the reflectance can be inverted to estimate the concentration of absorbing and scattering substances in the water, which are predominately composed of suspended sediment, chlorophyll, and dissolved organic matter. This publication describes the measurement method and investigates the precision of HydroColor's reflectance and turbidity estimates compared to commercial instruments. It is shown that HydroColor can measure the remote sensing reflectance to within 26% of a precision radiometer and turbidity within 24% of a portable turbidimeter. HydroColor distinguishes itself from other water quality camera methods in that its operation is based on radiometric measurements instead of image color. HydroColor is one of the few mobile applications to use a smartphone as a completely objective sensor, as opposed to subjective user observations or color matching using the human eye. This makes HydroColor a powerful tool for crowdsourcing of aquatic optical data.

  5. Validation and testing of the VAM2D computer code

    International Nuclear Information System (INIS)

    Kool, J.B.; Wu, Y.S.

    1991-10-01

    This document describes two modeling studies conducted by HydroGeoLogic, Inc. for the US NRC under contract no. NRC-04089-090, entitled, ''Validation and Testing of the VAM2D Computer Code.'' VAM2D is a two-dimensional, variably saturated flow and transport code, with applications for performance assessment of nuclear waste disposal. The computer code itself is documented in a separate NUREG document (NUREG/CR-5352, 1989). The studies presented in this report involve application of the VAM2D code to two diverse subsurface modeling problems. The first one involves modeling of infiltration and redistribution of water and solutes in an initially dry, heterogeneous field soil. This application involves detailed modeling over a relatively short, 9-month time period. The second problem pertains to the application of VAM2D to the modeling of a waste disposal facility in a fractured clay, over much larger space and time scales and with particular emphasis on the applicability and reliability of using equivalent porous medium approach for simulating flow and transport in fractured geologic media. Reflecting the separate and distinct nature of the two problems studied, this report is organized in two separate parts. 61 refs., 31 figs., 9 tabs

  6. The Feasibility of Small Hydro-Electric Generation in a Large Urban Area

    OpenAIRE

    Benson Y. Zhang; Adam Taylor

    2012-01-01

    The possibilities of generating electric power from relatively small hydro-electric sources in a large urban area is investigated. Two different aspects of hydro-electric sources have been studied: storm/waste water pipes in large multi-tenanted residential buildings and urban storm water discharge area (CSI area). The potential to generate from these sources has been investigated using a micro-turbine. The potential electric power which could be extracted from the sources was estimated using...

  7. Effect of hydro cooling and packaging on the shelf life of cold stored ...

    African Journals Online (AJOL)

    Selected litchi fruits cultivar Taiso harvested at full red color stage were destalked and were (a) non-hydro cooled and (b) hydro cooled at 0 - 1ºC for 12 to 15 minutes until the core pulp temperature reached 5ºC and were packed in LDPE plastic packaging, clip-on barquettes , opaque plastic bags,70 micron thick and cold ...

  8. 78 FR 34092 - Lock+ Hydro Friends Fund XXX, LLC; FFP Project 121, LLC; Notice of Competing Preliminary Permit...

    Science.gov (United States)

    2013-06-06

    .... 14504-000] Lock+ Hydro Friends Fund XXX, LLC; FFP Project 121, LLC; Notice of Competing Preliminary... Applications Lock+ Hydro Friends Fund XXX, LLC and FFP Project 121, LLC filed preliminary permit applications... regular business day. See id. at 385.2001(a)(2). Lock+ Hydro Friends Fund XXX, LLC's application is for a...

  9. Ontario Hydro Research Division, 1980

    International Nuclear Information System (INIS)

    The work of the Research Division of Ontario Hydro provides technical and scientific support for the engineering and operation of a power system that includes hydraulic, fossil-fired, and nuclear generation. It also relates to the transmission and distribution of electricity and to the need to help customers use electricity with safety and economy. Among the examples of projects given are qualification of CANDU heat transport system components, pressure tube replacement, steam generator integrity, testing for earthquake resistance, and radioactive waste disposal

  10. Hydro-economic modelling in mining catchments

    Science.gov (United States)

    Ossa Moreno, J. S.; McIntyre, N.; Rivera, D.; Smart, J. C. R.

    2017-12-01

    Hydro-economic models are gaining momentum because of their capacity to model both the physical processes related to water supply, and socio-economic factors determining water demand. This is particularly valuable in the midst of the large uncertainty upon future climate conditions and social trends. Agriculture, urban uses and environmental flows have received a lot of attention from researchers, as these tend to be the main consumers of water in most catchments. Mine water demand, although very important in several small and medium-sized catchments worldwide, has received less attention and only few models have attempted to reproduce its dynamics with other users. This paper describes an on-going project that addresses this gap, by developing a hydro-economic model in the upper Aconcagua River in Chile. This is a mountain catchment with large scale mining and hydro-power users at high altitudes, and irrigation areas in a downstream valley. Relevant obstacles to the model included the lack of input climate data, which is a common feature in several mining areas, the complex hydrological processes in the area and the difficulty of quantifying the value of water used by mines. A semi-distributed model developed within the Water Evaluation and Planning System (WEAP), was calibrated to reproduce water supply, and this was complemented with an analysis of the value of water for mining based on two methods; water markets and an analysis of its production processes. Agriculture and other users were included through methods commonly used in similar models. The outputs help understanding the value of water in the catchment, and its sensitivity to changes in climate variables, market prices, environmental regulations and changes in the production of minerals, crops and energy. The results of the project highlight the importance of merging hydrology and socio-economic calculations in mining regions, in order to better understand trade-offs and cost of opportunity of using

  11. Ultra thin hydro-films based on lactose-crosslinked fish gelatin for wound healing applications.

    Science.gov (United States)

    Etxabide, Alaitz; Vairo, Claudia; Santos-Vizcaino, Edorta; Guerrero, Pedro; Pedraz, Jose Luis; Igartua, Manoli; de la Caba, Koro; Hernandez, Rosa Maria

    2017-09-15

    This study focuses on the development and characterization of an ultra thin hydro-film based on lactose-mediated crosslinking of fish gelatin by Maillard reaction. Lactose results in the only efficient crosslinker able to produce resistant to handling hydro-films when compared to conventional crosslinkers such as glutaraldehyde or genipin (tested at 25 and 37°C in phosphate buffer saline solution (PBS)).The disappearance of the peak related to the N-containing groups (XPS) and the images obtained by SEM and AFM demonstrate the highly ordered nano-scaled structure of lactose-crosslinked gelatin, confirming the crosslinking efficiency. This dressing presents high hydrophilicity and mild occlusivity, as shown by the swelling curve (max swelling at 5min) and by the occlusion factor of 25.17±0.99%, respectively. It demonstrates high stability to hydrolysis or cell-mediated degradation. Moreover, ISO 10993-5:2009 biocompatibility assay results in undetectable cytotoxicity effects. Spreading, adhesion and proliferation assays confirm the excellent adaptability of the cells onto the hydro-film surface without invading the dressing. Finally, the hydro-film enables the controlled delivery of therapeutic factors, such as the epidermal growth factor (EGF). This study demonstrates that lactose-mediated crosslinking is able to produce ultra thin gelatin hydro-films with suitable properties for biomedical applications, such as wound healing. Copyright © 2017 Elsevier B.V. All rights reserved.

  12. New avenues in cobalt-60 production at Ontario Hydro

    International Nuclear Information System (INIS)

    Mylvaganam, C.K.; Ronchka, R.A.

    1990-01-01

    Ontario Hydro produces cobalt-60 in the control rods of twelve power reactors. These reactors have a typical flux of 2 x 10 14 neutrons/cm 2 /s, making them efficient producers of cobalt-60. Current annual production is 45 million curies. Since the primary function of these reactors is the production of electricity, their flexibility to meet the needs of commercial cobalt production by the control rod route is limited. Ontario Hydro is therefore developing innovative production techniques, making use of the CANDU reactor's unique ability to be fuelled on-power. These techniques will enable production to better respond to the market's requirements for quantity and specific activity. As it is supplementary to control rod production, annual supply could potentially reach 165 million curies. (author)

  13. Design concept of Hydro cascade control system

    International Nuclear Information System (INIS)

    Fustik, Vangel; Kiteva, Nevenka

    2006-01-01

    In this paper a design concept of the comple hydro cascade scheme is presented with the design parameters of the main technical features. The cascade control system architecture is designed considering up-to-date communication and information technology. The control algorithm is based on Pond Level Control and Economic Load Allocation concepts.

  14. Hydro-engineering structure and Liptovska Mara Pumped Storage Power Plant

    International Nuclear Information System (INIS)

    Regula, E.

    2005-01-01

    In this paper thirty years history of the Hydro-engineering structure and Liptovska Mara Pumped Storage Power Plant (PSPP) is presented. In 1975 year the Liptovska Mara PSPP was commissioned. There are 2 Kaplan turbines and 2 Derezias reversible turbines with a total installed power 198 MW. The average annual output is 134.5 GWh. As a part of this hydro-engineering structure is Besenova Small-scale power plants with 2 turbines and with installed power 4.64 MW. The average annual output consists 18.3 GWh. There up to end of 2004 year 3,620.172 MWh of electricity was produced. Environmental effects are discussed

  15. Small hydro takes stock of a dozen years of activity

    International Nuclear Information System (INIS)

    Leutwiler, H.

    2000-01-01

    This short article discusses a survey that takes stock of the investments made in small hydro schemes in Switzerland since 1985 and the structural changes in this area that have occurred. Typical figures are given for investments and the increase in energy production that have resulted. The various possibilities for the realisation of small hydro installations are discussed including pressure-reduction turbines, the use of turbines in drinking water and wastewater systems. The importance of the sale of the electricity thus generated as 'green' power is noted. The potential of this form of electricity generation in a liberalised electricity market and the obstacles placed in its way are discuss

  16. Dynamics analysis of the fast-slow hydro-turbine governing system with different time-scale coupling

    Science.gov (United States)

    Zhang, Hao; Chen, Diyi; Wu, Changzhi; Wang, Xiangyu

    2018-01-01

    Multi-time scales modeling of hydro-turbine governing system is crucial in precise modeling of hydropower plant and provides support for the stability analysis of the system. Considering the inertia and response time of the hydraulic servo system, the hydro-turbine governing system is transformed into the fast-slow hydro-turbine governing system. The effects of the time-scale on the dynamical behavior of the system are analyzed and the fast-slow dynamical behaviors of the system are investigated with different time-scale. Furthermore, the theoretical analysis of the stable regions is presented. The influences of the time-scale on the stable region are analyzed by simulation. The simulation results prove the correctness of the theoretical analysis. More importantly, the methods and results of this paper provide a perspective to multi-time scales modeling of hydro-turbine governing system and contribute to the optimization analysis and control of the system.

  17. The Modeling and Simulation of Thermal Analysis at Hydro Generator Stator Winding Insulation

    Directory of Open Access Journals (Sweden)

    Mihaela Raduca

    2006-10-01

    Full Text Available This paper presents the modelling and simulation of thermal analysis at hydro generator stator winding. The winding stator is supplied at high voltage of 11 kV for high power hydro generator. To present the thermal analysis for stator winding is presented at supply of coil by 11 kV, when coil is heat and thermal transfer in insulation at ambient temperature.

  18. Improvement of seawater salt quality by hydro-extraction and re-crystallization methods

    Science.gov (United States)

    Sumada, K.; Dewati, R.; Suprihatin

    2018-01-01

    Indonesia is one of the salt producing countries that use sea water as a source of raw materials, the quality of salt produced is influenced by the quality of sea water. The resulting average salt quality contains 85-90% NaCl. The Indonesian National Standard (SNI) for human salt’s consumption sodium chloride content is 94.7 % (dry base) and for industrial salt 98,5 %. In this study developed the re-crystallization without chemical and hydro-extraction method. The objective of this research to choose the best methods based on efficiency. The results showed that re-crystallization method can produce salt with NaCl content 99,21%, while hydro-extraction method content 99,34 % NaCl. The salt produced through both methods can be used as a consumption and industrial salt, Hydro-extraction method is more efficient than re-crystallization method because re-crystallization method requires heat energy.

  19. The development of biodiversity conservation measures in China's hydro projects: A review.

    Science.gov (United States)

    Bai, Ruiqiao; Liu, Xuehua; Liu, Xiaofei; Liu, Lanmei; Wang, Jianping; Liao, Sihui; Zhu, Annah; Li, Zhouyuan

    2017-11-01

    The hydropower capacity of China ranks first in the world and accounts for approximately 20% of the total energy production in the country. While hydropower has substantially contributed to meeting China's renewable energy targets and providing clean energy to rural areas, the development of hydropower in China has been met with significant controversy. Ecologically, hydro projects alter the landscape, with potential impacts to the country's aquatic biodiversity. Over the past four decades in China, various mainstream opinions and misunderstandings have been presented concerning how to alleviate the negative impacts of hydro projects on aquatic ecosystems. This article reviews research concerning potential mitigation measures to enhance aquatic biodiversity conservation in hydro projects in China. Based on the academic attention such research has attracted, three technical measures for aquatic biodiversity conservation are considered: (1) fish passages, (2) restocking efforts and (3) river and lake renovations. This article provides a historical comparison of these three practices in China to demonstrate the advantages and disadvantages of each method. The article also reviews the relevant legislation, regulations and technical guidelines concerning China's hydro projects dating back to 1979. The dynamics in research, publications, and patents concerning these three mitigation measures are summarized to demonstrate their technological developments in the context of legislative and policy advances. Data were gathered through the China Knowledge Resource Integrated Database and the State Intellectual Property Office of the People's Republic of China. Based on the analysis provided, the article recommends an expansion of China's environmental certification system for hydro projects, more robust regional legislation to bolster the national framework, the cooperation between upstream and downstream conservation mechanisms, and better monitoring to determine the efficacy

  20. Highly selective BSA imprinted polyacrylamide hydrogels facilitated by a metal-coding MIP approach.

    Science.gov (United States)

    El-Sharif, H F; Yapati, H; Kalluru, S; Reddy, S M

    2015-12-01

    We report the fabrication of metal-coded molecularly imprinted polymers (MIPs) using hydrogel-based protein imprinting techniques. A Co(II) complex was prepared using (E)-2-((2 hydrazide-(4-vinylbenzyl)hydrazono)methyl)phenol; along with iron(III) chloroprotoporphyrin (Hemin), vinylferrocene (VFc), zinc(II) protoporphyrin (ZnPP) and protoporphyrin (PP), these complexes were introduced into the MIPs as co-monomers for metal-coding of non-metalloprotein imprints. Results indicate a 66% enhancement for bovine serum albumin (BSA) protein binding capacities (Q, mg/g) via metal-ion/ligand exchange properties within the metal-coded MIPs. Specifically, Co(II)-complex-based MIPs exhibited 92 ± 1% specific binding with Q values of 5.7 ± 0.45 mg BSA/g polymer and imprinting factors (IF) of 14.8 ± 1.9 (MIP/non-imprinted (NIP) control). The selectivity of our Co(II)-coded BSA MIPs were also tested using bovine haemoglobin (BHb), lysozyme (Lyz), and trypsin (Tryp). By evaluating imprinting factors (K), each of the latter proteins was found to have lower affinities in comparison to cognate BSA template. The hydrogels were further characterised by thermal analysis and differential scanning calorimetry (DSC) to assess optimum polymer composition. The development of hydrogel-based molecularly imprinted polymer (HydroMIPs) technology for the memory imprinting of proteins and for protein biosensor development presents many possibilities, including uses in bio-sample clean-up or selective extraction, replacement of biological antibodies in immunoassays and biosensors for medicine and the environment. Biosensors for proteins and viruses are currently expensive to develop because they require the use of expensive antibodies. Because of their biomimicry capabilities (and their potential to act as synthetic antibodies), HydroMIPs potentially offer a route to the development of new low-cost biosensors. Herein, a metal ion-mediated imprinting approach was employed to metal-code our

  1. Asymptotic study of a magneto-hydro-dynamic system

    International Nuclear Information System (INIS)

    Benameur, J.; Ibrahim, S.; Majdoub, M.

    2003-01-01

    In this paper, we study the convergence of solutions of a Magneto-Hydro-Dynamic system. On the torus T 3 , the proof is based on Schochet's methods, whereas in the case of the whole space R 3 , we use Strichartz's type estimates. (author)

  2. Statistical variability of hydro-meteorological variables as indicators ...

    African Journals Online (AJOL)

    Statistical variability of hydro-meteorological variables as indicators of climate change in north-east Sokoto-Rima basin, Nigeria. ... water resources development including water supply project, agriculture and tourism in the study area. Key word: Climate change, Climatic variability, Actual evapotranspiration, Global warming ...

  3. Coupled thermo-hydro-mechanical processes around a bentonite buffer embedded in Opalinus Clay - Comparison between measurements and calculations

    Energy Technology Data Exchange (ETDEWEB)

    Goebel, Ingeborg; Alheid, Hans-Joachim [BGR Hannover, Stilleweg 2, D-30655 Hannover (Germany); Jockwer, Norbert [Gesellschaft fuer Anlagen- und Reaktorsicherheit (GRS) mbH, Theodor-Heuss-Str. 4, 38122 Braunschweig (Germany); Mayor, Juan Carlos [ENRESA, Emilio Vargas 7, E-Madrid (Spain); Garcia-Sineriz, Jose Luis [AITEMIN, c/ Alenza, 1 - 28003 Madrid (Spain); Alonso, Eduardo; Munoz, Juan Jorge [International Center for Numerical Methods in Engineering, CIMNE, Edificio C-1, Campus Norte UPC, C/Gran Capitan, s/n, 08034 Barcelona (Spain); Weber, Hans Peter [NAGRA, Hardstrasse 73, CH-5430 Wettingen (Switzerland); Ploetze, Michael [ETHZ, Eidgenoessische Technische Hochschule Zuerich, ETH Zentrum, HG Raemistrasse 101, CH-8092 Zuerich (Switzerland); Klubertanz, Georg [COLENCO Power Engineering Ltd, CPE, Taefern Str. 26, 5405 Baden-Daettwil (Switzerland); Ammon, Christian [Rothpletz, Lienhard, Cie AG, Schifflaendestrasse 35, 5001 Aarau (Switzerland)

    2004-07-01

    The Heater Experiment at the Mont Terri Underground Laboratory consists of an engineered barrier system composed of compacted bentonite blocks around a heater. The bentonite barrier is embedded in Opalinus Clay. The aim of the project is improved understanding of thermo-hydro mechanically (THM) coupled processes. Calculations are performed by 2 Finite-Element programs, CODE-BRIGHT and MHERLIN, the former for the near-field modeling and the latter for the rock modeling. Numerical modeling is carried out during all phases of the project to give input for design tasks such as cooling and dismantling, and to finally produce verified models of the THM coupled engineered barrier system. Results of both programs are discussed in the light of the experimental findings. (authors)

  4. A multi-scale computational scheme for anisotropic hydro-mechanical couplings in saturated heterogeneous porous media

    NARCIS (Netherlands)

    Mercatoris, B.C.N.; Massart, T.J.; Sluys, L.J.

    2013-01-01

    This contribution discusses a coupled two-scale framework for hydro-mechanical problems in saturated heterogeneous porous geomaterials. The heterogeneous nature of such materials can lead to an anisotropy of the hydro-mechanical couplings and non-linear effects. Based on an assumed model of the

  5. Value of pumped hydro storage in a hybrid energy generation and allocation system

    International Nuclear Information System (INIS)

    Kocaman, Ayse Selin; Modi, Vijay

    2017-01-01

    Highlights: •We propose a two-stage stochastic mixed-integer programming model for a hybrid energy system. •We investigate the solar and PHES integration considering the streamflow uncertainty. •We study the benefit of PHES system over conventional hydropower systems to support solar. •We examine the role of PHES systems in both isolated and connected systems. -- Abstract: Transition from fossil fuels to renewable sources is inevitable. In this direction, variation and intermittency of renewables can be integrated into the grid by means of hybrid systems that operate as a combination of alternative resources, energy storage and long distance transmission lines. In this study, we propose a two-stage stochastic mixed-integer programming model for sizing an integrated hybrid energy system, in which intermittent solar generation in demand points is supported by pumped hydro storage (PHES) systems and diesel is used as an expensive back-up source. PHES systems work as a combination of pumped storage and conventional hydropower stations since there is also natural streamflow coming to the upper reservoirs that shows significant seasonal and inter-annual variability and uncertainty. With several case studies from India, we examine the role of high hydropower potential in the Himalaya Mountains to support solar energy generation in the form of pumped hydro or conventional hydro system while meeting the demand at various scales. We show that pumped hydro storage can keep the diesel contribution to meet the demand less than 10%, whereas this number can go up to more than 50% for conventional systems where the streamflow potential is limited compared to the demand. We also examine the role of pumped hydro systems in both isolated and connected systems (through inter-regional transmission lines) and show that the benefit of pumped hydro is more significant in isolated systems and resource-sharing in connected systems can substitute for energy storage. In addition, with

  6. Tree ring-based chronology of hydro-geomorphic processes as a fundament for identification of hydro-meteorological triggers in the Hrubý Jeseník Mountains (Central Europe).

    Science.gov (United States)

    Tichavský, Radek; Šilhán, Karel; Tolasz, Radim

    2017-02-01

    Hydro-geomorphic processes have significantly influenced the recent development of valley floors, river banks and depositional forms in mountain environments, have caused considerable damage to manmade developments and have disrupted forest management. Trees growing along streams are affected by the transported debris mass and provide valuable records of debris flow/flood histories in their tree-ring series. Dendrogeomorphic approaches are currently the most accurate methods for creating a chronology of the debris flow/flood events in forested catchments without any field-monitoring or a stream-gauging station. Comprehensive studies focusing on the detailed chronology of hydro-geomorphic events and analysis of meteorological triggers and weather circulation patterns are still lacking for the studied area. We provide a spatio-temporal reconstruction of hydro-geomorphic events in four catchments of the Hrubý Jeseník Mountains, Czech Republic, with an analysis of their triggering factors using meteorological data from four nearby rain gauges. Increment cores from 794 coniferous trees (Picea abies [L.] Karst.) allowed the identification of 40 hydro-geomorphic events during the period of 1889-2013. Most of the events can be explained by extreme daily rainfalls (≥50mm) occurring in at least one rain gauge. However, in several cases, there was no record of extreme precipitation at rain gauges during the debris flow/flood event year, suggesting extremely localised rainstorms at the mountain summits. We concluded that the localisation, intensity and duration of rainstorms; antecedent moisture conditions; and amount of available sediments all influenced the initiation, spatial distribution and characteristics of hydro-geomorphic events. The most frequent synoptic situations responsible for the extreme rainfalls (1946-2015) were related to the meridional atmospheric circulation pattern. Our results enhance current knowledge of the occurrences and triggers of debris flows

  7. Using historic earnings to value hydro energy

    International Nuclear Information System (INIS)

    Robson, I.A.; Whittington, H.W.

    1993-01-01

    This article briefly presents a technique for assigning a value to the water held in and removed from the hydro reservoir. Using historic earnings as the basis for a series of equations, it aims to give engineers trading energy a reliable means of placing a value on what is effectively a ''free'' resource. (Author)

  8. Improved cyberinfrastructure for integrated hydrometeorological predictions within the fully-coupled WRF-Hydro modeling system

    Science.gov (United States)

    gochis, David; hooper, Rick; parodi, Antonio; Jha, Shantenu; Yu, Wei; Zaslavsky, Ilya; Ganapati, Dinesh

    2014-05-01

    The community WRF-Hydro system is currently being used in a variety of flood prediction and regional hydroclimate impacts assessment applications around the world. Despite its increasingly wide use certain cyberinfrastructure bottlenecks exist in the setup, execution and post-processing of WRF-Hydro model runs. These bottlenecks result in wasted time, labor, data transfer bandwidth and computational resource use. Appropriate development and use of cyberinfrastructure to setup and manage WRF-Hydro modeling applications will streamline the entire workflow of hydrologic model predictions. This talk will present recent advances in the development and use of new open-source cyberinfrastructure tools for the WRF-Hydro architecture. These tools include new web-accessible pre-processing applications, supercomputer job management applications and automated verification and visualization applications. The tools will be described successively and then demonstrated in a set of flash flood use cases for recent destructive flood events in the U.S. and in Europe. Throughout, an emphasis on the implementation and use of community data standards for data exchange is made.

  9. Hydro power in the German system of energy supply; Wasserkraft im Energiesystem Deutschland

    Energy Technology Data Exchange (ETDEWEB)

    Kaltschmitt, M. [Stuttgart Univ. (Germany). Abt. Neue Energietechnologie und Technikanalyse

    1997-12-31

    The technical potentials of electric power generation from hydro power in Germany, the current harnessing of hydro power, its costs, and certain characteristic quantities reflecting its effects on the environment are described. These diverse characteristic quantities are compared with those of other renewable and fossil energy sources used to generate electricity. On this basis, opportunities for extending the use of hydro power in Germany and its limits are discussed. (orig.) [Deutsch] Das Ziel der folgenden Ausfuehrungen ist, die technischen Potentiale und deren derzeitige Nutzung, die Kosten und bestimmte die Umwelteffekte beschreibende Kenngroessen einer Stromerzeugung aus Wasserkraft in Deutschland darzustellen. Diese unterschiedlichen Kenngroessen werden anschliessend mit denen anderer regenerativer Energien und fossiler Energietraeger zur Stromerzeugung verglichen. Ausgehend davon werden die Moeglichkeiten und Grenzen einer weitergehenden Wasserkraftnutzung im Energiesystem Deutschland diskutiert. (orig.)

  10. Hydro Power Reservoir Aggregation via Genetic Algorithms

    Directory of Open Access Journals (Sweden)

    Markus Löschenbrand

    2017-12-01

    Full Text Available Electrical power systems with a high share of hydro power in their generation portfolio tend to display distinct behavior. Low generation cost and the possibility of peak shaving create a high amount of flexibility. However, stochastic influences such as precipitation and external market effects create uncertainty and thus establish a wide range of potential outcomes. Therefore, optimal generation scheduling is a key factor to successful operation of hydro power dominated systems. This paper aims to bridge the gap between scheduling on large-scale (e.g., national and small scale (e.g., a single river basin levels, by applying a multi-objective master/sub-problem framework supported by genetic algorithms. A real-life case study from southern Norway is used to assess the validity of the method and give a proof of concept. The introduced method can be applied to efficiently integrate complex stochastic sub-models into Virtual Power Plants and thus reduce the computational complexity of large-scale models whilst minimizing the loss of information.

  11. BC Hydro - IPC review : report on the creation of IPC International Power Corporation and its joint venture with the British Columbia Hydro and Power Authority for the Raiwind power project

    International Nuclear Information System (INIS)

    1997-03-01

    BC Hydro is one of the sponsors involved in the construction of a thermal electric power plant in Raiwind, Pakistan. As a Crown corporation, BC Hydro and its participation in the project is subject to the policies and priorities of the provincial government. This document describes the circumstances surrounding the creation of the International Power Corporation (IPC) and its joint venture with BC Hydro for the development of international power projects including the Raiwind project. The project has provoked much public discussion in British Columbia because of the involvement of Cayman Island companies in the project structure. There is concern with the intermingling of public and private interests in the project, including allegations that an IPC share offering benefited insiders of government and BC Hydro. A description of the history and structure of the Raiwind project and detailed information on the British Columbia participants is provided. Directors and shareholders of the principal corporate participants are listed. The development process in Pakistan, the key features of the project and the underlying agreements among the participants are described. An assessment of potential conflicts of interest and a review of public sector standards and guidelines regarding conflicts of interest is presented. 60 refs., 39 tabs., 6 figs

  12. Financing options for small hydro projects

    International Nuclear Information System (INIS)

    Shepherd, J.C.

    1993-01-01

    Examples and techniques used to enhance the ability to finance small hydro projects, or to finance them in non-standard ways, were discussed. It was suggested that factors that motivate investors, namely the maximization of the rate of return on capital, and minimization of risk, should be the primary concern for any would-be developer. A responsible, conservative approach to financial projections was recommended as the best to impress potential investors

  13. Notes for remarks by William A. Farlinger, chairman of Ontario Hydro

    International Nuclear Information System (INIS)

    Farlinger, W.A.

    1997-01-01

    The advantages of convergence for gas and electric companies were discussed. Both utilities possess transmission lines, rights of way, billing systems and long-term customer relationships. The speaker, Chairman of Ontario Hydro, suggested that within a few years, customers may be in a position to choose their power supplier. Ontario Hydro's vision for convergence and the recent restructuring of the Corporation into three new signature companies (generation, transmission, retail) were described. In this process Ontario Hydro has taken steps toward open access to the grid by all producers, competition among many sellers and buyers, and choice of supplier by consumers for lower cost power. One of the basic driving forces for convergence in the energy field is the interchangeability of electricity or gas. Some municipalities have already implemented joint gas and electricity meter reading, and there are many other ways in which converge can provide cheaper power and better service to the consumer. Ultimately, convergence would mean that monopolies would disappear, as would the boundaries between the gas and electricity industries

  14. Perceived risk of nuclear and hydro electrical power generation in Colombia

    International Nuclear Information System (INIS)

    Munera, H.A.

    1982-12-01

    This report deals with the estimation of risk factors of hydro plants and the perception of risks and benefits of nuclear, hydropower and coal by a selected part of the public. Historical data (1922 - 1979) on occurrence of earthquakes in Colombia demonstrate high seismicity (3,489 incidents) for the country in total and also for areas where the majority of hydro projects are to be located. Model-based calculations of regional probabilities for earthquakes at prospective dam-sites with a magnitude of 7 (Richter scale) or larger resulted in p=0.038/year for a 50 year recurrence period for high and p=0.0004/year for low seismicity areas. Attitudes towards three energy systems were elicited from 130 university students and graduates with a questionnaire based on a psychometric model. Generally attitudes were most favourable towards hydro, less favourable towards coal and more critical towards nuclear. Nuclear is perceived to have economic advantages, but to pose environmental, individual and societal risks. Respondents PRO and CON nuclear agree on the lack of risk from hydropower

  15. 76 FR 8728 - Bear Creek Hydro Associates, LLC; Notice of Preliminary Permit Application Accepted for Filing...

    Science.gov (United States)

    2011-02-15

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project No. 13951-000] Bear Creek Hydro..., Motions To Intervene, and Competing Applications On December 22, 2010, the Bear Creek Hydro Associates... (FPA), proposing to study the [[Page 8729

  16. Defense plan of Hydro-Quebec for extreme contingencies

    International Nuclear Information System (INIS)

    Trudel, Guilles; Bernard, Serge; Portales, Esteban

    2000-01-01

    In the last years, Hydro-Quebec it undertook an important program to improve the dependability of their net of energy transport. They concentrated the efforts on increasing the capacity of the net resist in the event of carries to an extreme contingency caused in general by multiple incidents or for successive disconnection of the lines of energy transport. To neutralize these contingencies, Hydro-Quebec it adopted a series of special measures that are contained under the general title of Plan of Defense for Extreme Contingencies. The objective of this plan is to detect the incidents that surpass the capacity of the net. It is completely automatic and it is based mainly in: A system of automatic disconnection of generation and tele-shot of loads; A system of automatic maneuver (opening and closing) of inductances shunt of 735 kw; A system of disconnection of loads for low voltage; A system of disconnection of loads for low frequency. The present document summarizes the orientations that there is taking Hydro-Quebec to protect its net in the event of extreme contingencies and it describes the different automatism that they are adopts, in particular the system automatic disconnection of generation and tele-shot of loads (RPTC) that is one of the main components of the defense plan. The system RPTC detects the simultaneous loss of several lines directly in 15 substations of 735 kw. It understands four places of automatic disconnection of generation and a centralized system of tele-shot of loads

  17. Development of Dalaelven hydro power scheme in Sweden

    International Nuclear Information System (INIS)

    Kokko, Voitto; Hjerthen, Peter; Ingfaelt, Hans; Loewen, Karl-Erik; Sjoegren, Arne

    2015-01-01

    The Dalaelven hydro scheme is located in central Sweden. Fortum has in the scheme 50 dams and 35 hydro power plants producing 4 TWh energy with a capacity of 970 MW. The main reservoirs are Lake Siljan and Traengsletsjoen with Traengslet dam, the highest earth-filled dam in Sweden. Development of the hydro scheme started 1878 with construction of four power plants for industry until 1930. From 1931 to 1974 15 power plants were built for increasing electricity consumption. De-regulation of the energy market in 1990's and EU environmental targets in 2000's resulted in the rehabilitation of ten power plants between 1990 and 2014 with increased annual energy production of 377 GWh (29%) and capacity 124 MW (59%). This energy decreases the annual CO 2 emissions with 125918 tons in comparison to production of the same amount of energy by coal. In several cases the rehabilitation was made in new power houses, allowing the development of the layout and technology of civil structures, and use of state-of-art equipment. Sweden uses the green certificate system, and 235 GWh of the energy received this certificate. Other environmental benefits come from use of the environmentally friendly Kaplan turbines and construction of some new fish pass. There are further plans to increase the spillway capacity of Traengslet dam and to rehabilitate eight power plant units. The possibilities of obtaining the Environmental licences for the rehabilitations has became challenging in the past years and green certificates are nowadays agreed only for increased energy. (authors)

  18. Hydro-mechanical processes

    Energy Technology Data Exchange (ETDEWEB)

    Laouafa, F.; Kazmierczak, J.B. [Institut National de l' Environnement Industriel et des Risques (INERIS), Parc Technologique ALATA, 60 - Verneuil en Halatte (France); Armand, G. [Agence Nationale pour la Gestion des Dechets Radioactifs, Lab. de Souterrain de Meuse/Haute-Marne, 55 - Bure (France); Vaunat, J. [Catalonia UPC- Technical Univ., Barcelona (Spain); Jobmann, M.; Polster, M. [DBETEC- DBE Technology GmbH, Peine (Germany); Su, K.; Lebon, P.; Plas, F.; Armand, G.; Abou-Chakra Guery, A.; Cormery, F.; Shao, J.F.; Kondo, D. [ANDRA - Agence Nationale pour la Gestion des Dechets Radioactifs, 92 - Chatenay Malabry (France); Souley, M. [Institut National de l' Environnement Industriel et des Risques (INERIS), 54 - Nancy (France); Coll, C.; Charlier, R.; Collin, F.; Gerard, P. [Liege Univ., Dept. ArGEnCo (Belgium); Xiang Ling, Li [ESV EURIDICE, SCK.CEN, Belgian Nuclear Research Centre, Mol (Belgium); Collin, F. [Liege Univ., Charge de Recherches FNRS (Belgium); Pellet, F.L.; Fabre, G. [University Joseph Fourier, Laboratory 3S-R, 38 - Grenoble (France); Garcia-Sineriz, J.L.; Rey, M. [AITEMIN - Asociacion para la Investigacion y Desarrollo Industrial de los Recursos Naturales, Madrid (Spain); Mayor, J.C. [ENRESA - Empresa Nacional des Residuos Radioactivos, Madrid (Spain); Castellanos, E.; Romero, E.; Lloret, A.; Gens, A. [Catalunya Univ. Politecnica, UPC (Spain); Villar, M.V. [CIEMAT - Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas, Madrid (Spain); Chambon, R. [Laboratoire 3S, UJF-INPG-CNRS, 38 - Grenoble (France); Czaikowski, O.; Lux, K.H. [Clausthal Univ. of Technology, Professorship for Waste Disposal and Geomechanics, Clausthal-Zellerfeld (Germany); Van Geet, M.; Bastiaens, W.; Volckaert, G.; Weetjens, E.; Sillen, X. [SCK-CEN, Waste and Disposal dept., Mol (Belgium); ONDRAF/NIRAS, Brussel (Belgium); Imbert, Ch. [CEA Saclay, Dept. de Physico-Chimie (DPC/SCCME/LECBA), 91 - Gif sur Yvette (France)] [and others

    2007-07-01

    This session gathers 13 articles dealing with: three-dimensional and time stepping modelling of the whole Meuse/Haute-Marne ANDRA URL (F. Laouafa, J.B. Kazmierczak, G. Armand, J. Vaunat, M. Jobmann, M. Polster); a constitutive model for a deep argillaceous rock using Hoek-Brown criteria (K. Su, C. Chavant, M. Souley); the long term behaviour of the Boom clay: influence of viscosity on the pore pressure distribution (C. Coll, R. Charlier, X.L. Li, F. Collin); the microstructural changes induced by viscoplastic deformations in argillaceous rocks (F.L. Pellet, G. Fabre, K. Su, P. Lebon); the engineered barrier experiment at Mont Terri rock laboratory (J.L. Garcia-Sineriz, M. Rey, J.C. Mayor); the chemical influence on the Hydro-Mechanical behaviour of high-density FEBEX bentonite (E. Castellanos, M.V. Villar, E. Romero, A. Lloret, A. Gens); the influence of water exchanges on the gallery convergence (P. Gerard, R. Charlier, R. Chambon, F. Collin); a new method for ageing resistant storage of argillaceous rock samples to achieve reproducible experimental results even after long intermediate storage times (O. Czaikowski, K.H. Lux); the installation and evaluation of a large-scale in-situ shaft seal experiment in Boom clay the RESEAL project M. Van Geet, W. Bastiaens, G. Volckaert, E. Weetjens, X. Sillen, A. Gens, M.V. Villar, Ch. Imbert, M. Filippi, F. Plas); the hydro-Mechanical response of the Callovo-Oxfordian mud-stone around a deep vertical drift (J. Vaunat, B. Garitte, A. Gens, K. Su, G. Armand); the sensitivity of total stress to changes in externally applied water pressure in KBS-3 buffer bentonite (J.F. Harrington, D.J. Birchall, P. Sellin); the comparison of the poro-elastic behavior of Meuse/Haute Marne and Tournemire argillites: effect of loading and saturation states (E. Bemer, A. Noiret, F. Homand, A. Rejeb); and the multi-scale modelling of the argillites mechanical behaviour (A. Abou-Chakra Guery, F. Cormery, K. Su, J.F. Shao, D. Kondo)

  19. Introducing the CUAHSI Hydrologic Information System Desktop Application (HydroDesktop) and Open Development Community

    Science.gov (United States)

    Ames, D.; Kadlec, J.; Horsburgh, J. S.; Maidment, D. R.

    2009-12-01

    The Consortium of Universities for the Advancement of Hydrologic Sciences (CUAHSI) Hydrologic Information System (HIS) project includes extensive development of data storage and delivery tools and standards including WaterML (a language for sharing hydrologic data sets via web services); and HIS Server (a software tool set for delivering WaterML from a server); These and other CUASHI HIS tools have been under development and deployment for several years and together, present a relatively complete software “stack” to support the consistent storage and delivery of hydrologic and other environmental observation data. This presentation describes the development of a new HIS software tool called “HydroDesktop” and the development of an online open source software development community to update and maintain the software. HydroDesktop is a local (i.e. not server-based) client side software tool that ultimately will run on multiple operating systems and will provide a highly usable level of access to HIS services. The software provides many key capabilities including data query, map-based visualization, data download, local data maintenance, editing, graphing, data export to selected model-specific data formats, linkage with integrated modeling systems such as OpenMI, and ultimately upload to HIS servers from the local desktop software. As the software is presently in the early stages of development, this presentation will focus on design approach and paradigm and is viewed as an opportunity to encourage participation in the open development community. Indeed, recognizing the value of community based code development as a means of ensuring end-user adoption, this project has adopted an “iterative” or “spiral” software development approach which will be described in this presentation.

  20. 78 FR 48670 - Rivermill Hydroelectric, Inc., New Hampshire Hydro Associates; Notice of Transfer of Exemption

    Science.gov (United States)

    2013-08-09

    ... Hydroelectric, Inc., New Hampshire Hydro Associates; Notice of Transfer of Exemption August 5, 2013. 1. By letter filed July 19, 2013, Rivermill Hydroelectric, Inc. and New Hampshire Hydro Associates informed the... Project, FERC No. 9403. All correspondence should be forwarded to Rivermill Hydroelectric, Inc., c/o Essex...

  1. Hydropower and Environmental Sustainability - HydroES 2016 Report on the Conference held by SHF in Grenoble on March 16-17, 2016

    International Nuclear Information System (INIS)

    Barillier, Agnes; Caignaert, Guy; Gouraud, Veronique; Ramos, Maria-Helena; Roult, Didier; Viollet, Pierre-Louis

    2016-01-01

    Hydropower is an important source of renewable energy for electrical production in Europe and throughout the world. Being flexible and allowing energy storage, it also facilitates the development of intermittent energy in electricity systems. The development, operation and maintenance of hydropower production are closely related to growing concerns on environment sustainability, climate change mitigation and meeting societal needs for energy. Reliable and efficient hydropower facilities can improve hydropower performance and the environmental acceptability of new projects when they are also planned to protect the environment in which they operate. This document presents a synthesis report of the international conference HydroES 2016 - Hydropower and Environmental Sustainability, organized by SHF and hosted by INP ENSE3, in Grenoble, on 16-17 March 2016. It shows that the scientific community and the hydropower industry are committed to assessing environment and social impacts of hydropower and are proactive towards a sustainable future. (authors)

  2. Asymptotic study of a magneto-hydro-dynamic system

    Energy Technology Data Exchange (ETDEWEB)

    Benameur, J [Institut Preparatoire aux Etudes d' Ingenieurs de Monastir (Tunisia); Ibrahim, S [Faculte des Sciences de Bizerte, Departement de Mathematiques, Bizerte (TN); [Abdus Salam International Centre for Theoretical Physics, Trieste (Italy)]. E-mail: slim.ibrahim@fsb.rnu.tn; Majdoub, M [Faculte des Sciences de Tunis, Departement de Mathematiques, Tunis (Tunisia)

    2003-01-01

    In this paper, we study the convergence of solutions of a Magneto-Hydro-Dynamic system. On the torus T{sup 3}, the proof is based on Schochet's methods, whereas in the case of the whole space R{sup 3}, we use Strichartz's type estimates. (author)

  3. A parallel calibration utility for WRF-Hydro on high performance computers

    Science.gov (United States)

    Wang, J.; Wang, C.; Kotamarthi, V. R.

    2017-12-01

    A successful modeling of complex hydrological processes comprises establishing an integrated hydrological model which simulates the hydrological processes in each water regime, calibrates and validates the model performance based on observation data, and estimates the uncertainties from different sources especially those associated with parameters. Such a model system requires large computing resources and often have to be run on High Performance Computers (HPC). The recently developed WRF-Hydro modeling system provides a significant advancement in the capability to simulate regional water cycles more completely. The WRF-Hydro model has a large range of parameters such as those in the input table files — GENPARM.TBL, SOILPARM.TBL and CHANPARM.TBL — and several distributed scaling factors such as OVROUGHRTFAC. These parameters affect the behavior and outputs of the model and thus may need to be calibrated against the observations in order to obtain a good modeling performance. Having a parameter calibration tool specifically for automate calibration and uncertainty estimates of WRF-Hydro model can provide significant convenience for the modeling community. In this study, we developed a customized tool using the parallel version of the model-independent parameter estimation and uncertainty analysis tool, PEST, to enabled it to run on HPC with PBS and SLURM workload manager and job scheduler. We also developed a series of PEST input file templates that are specifically for WRF-Hydro model calibration and uncertainty analysis. Here we will present a flood case study occurred in April 2013 over Midwest. The sensitivity and uncertainties are analyzed using the customized PEST tool we developed.

  4. Hydro-carbon liquid for use in motors

    Energy Technology Data Exchange (ETDEWEB)

    Cobbett, G T.B.

    1907-03-15

    A process for the manufacture of liquid hydro-carbon mixtures suitable as a fuel for internal-combustion engines is disclosed, which consists in dissolving a suitable quantity of shale oil, which has been purified with sulfuric acid, in petroleum spirit, then purifying the solution with sulfuric acid and subsequently with oxalic acid or other suitable decolorizing agent.

  5. Hydro-geophysical investigations for groundwater at Atan ...

    African Journals Online (AJOL)

    The depth to bedrock varies from 5.5 - 53.1m with resistivity values ranging between 61 -11,292 ohm-m. The hydro-geologic study focused on measurement of depth to water table and actual depth of the hand dug wells while the geological aspect of the work was hinged on a geologic mapping. The results of hydrogeologic ...

  6. Comparative fate of an organochlorine, chlordecone, and a related compound, chlordecone-5b-hydro, in soils and plants.

    Science.gov (United States)

    Clostre, Florence; Cattan, Philippe; Gaude, Jean-Marie; Carles, Céline; Letourmy, Philippe; Lesueur-Jannoyer, Magalie

    2015-11-01

    We address the problem of the comparative environmental fate of a pesticide, chlordecone (CLD), and a related compound, chlordecone-5b-hydro (CLD-5b-hydro). We used a large database including data from two types of contaminated volcanic soils, andosol and nitisol, and thirteen crops grown in the French West Indies in historically polluted soils. We performed in-depth statistical analysis of the effect of different parameters (soil type, crop, organ, etc.) on the ratio of CLD-5b-hydro to CLD in both soils and plants. The environmental fate of the two compounds differed depending on the type of soil. Proportionally, more CLD-5b-hydro than CLD was measured in nitisols than in andosols. Compared to CLD, we also found a preferential transfer of CLD-5b-hydro from the soil to the plant. Finally, mobilization of the two compounds differed according to the species of crop but also within the plant, with increasing ratios from the roots to the top of the plant. The properties of the compound played a key role in the underlying processes. Because CLD-5b-hydro is more soluble in water and has a lower K(ow) than CLD, CLD-5b-hydro (1) was more easily absorbed from soils by plants, (2) was less adsorbed onto plant tissues and (3) was transported in greater quantities through the transpiration stream. Due to the amounts of CLD-5b-hydro we measured in some plant parts such as cucurbit fruits, an assessment of the toxicity of this CLD monodechlorinated product is recommended. Copyright © 2015 Elsevier B.V. All rights reserved.

  7. 77 FR 23241 - Lock+ Hydro Friends Fund XXX, LLC; Notice of Intent To File License Application, Filing of Pre...

    Science.gov (United States)

    2012-04-18

    ... Friends Fund XXX, LLC; Notice of Intent To File License Application, Filing of Pre-Application Document.... Date Filed: February 20, 2012. d. Submitted By: Lock+ Hydro Friends Fund XXX, LLC. e. Name of Project... Applicant Contact: Mr. Mark R. Stover, Lock+\\TM\\ Hydro Friends Fund XXX, c/o Hydro Green Energy, LLC, 900...

  8. Hydro-geomorphologic events in Portugal and its association with Circulation weather types

    Science.gov (United States)

    Pereira, Susana; Ramos, Alexandre M.; Rebelo, Luís; Trigo, Ricardo M.; Zêzere, José L.

    2017-04-01

    Floods and landslides correspond to the most hazardous weather driven natural disasters in Portugal. A recent improvement on their characterization has been achieved with the gathering of basic information on past floods and landslides that caused social consequences in Portugal for the period 1865-2015 through the DISASTER database (Zêzere et al., 2014). This database was built under the assumption that strong social impacts of floods and landslides are sufficient relevant to be reported consistently by national and regional newspapers. The DISASTER database contains detailed information on the location, date of occurrence and social impacts (fatalities, injuries, missing people, evacuated and homeless people) of each individual hydro-geomorphologic case (1677 flood cases and 292 landslide cases). These hydro-geomorphologic disaster cases are grouped in a restrict number of DISASTER events that were selected according to the following criteria: a set of at least 3 DISASTER cases sharing the same trigger in time (with no more than 3 days without cases), which have a widespread spatial extension related to the triggering mechanism and a certain magnitude. In total, the DISASTER database includes 134 events (3.7 average days of duration) that generated high social impacts in Portugal (962 fatalities and 40878 homeless people). Each DISASTER event was characterized with the following attributes: hydro-geomorphologic event type (e.g landslides, floods, flash floods, urban floods); date of occurrence (year, month and days); duration in days; spatial location in GIS; number of fatalities, injured, evacuated and homeless people; and weather type responsible for triggering the event. The atmospheric forcing at different time scales is the main trigger for the hydro-meteorological DISASTER events occurred in Portugal. In this regard there is an urge for a more systematic assessment of the weather types associated to flood and landslide damaging events to correctly

  9. Hydro-Quebec annual report, 1993

    International Nuclear Information System (INIS)

    1994-01-01

    An overview is presented of the activities of Hydro-Quebec for the year ended December 31, 1993, as well as its financial status. Export sales of electricity to other Canadian provinces and the USA are reported. Research programs and demonstration projects are described, as well as the utility's international activities. Environmental and economic considerations for the province are presented. Financial data includes total sales, sales by sector, export sales, and rate changes. A financial statement is included. In 1993, total sales volume was 152.1 TWh, or 7.5 TWh more than in 1992, for a total sales revenue of $7,004 million, an increase of 3.5% over 1992. Sales in Quebec increased 5 TWh, with nearly all of this increase coming from the industrial sector. Exports outside of Quebec totalled 15 TWh, or 20% more than in 1992. The largest increase in exports was in the form of short-term sales to the USA. Expenditures in 1993 were $3,761 million, only slightly more than in 1992. Facilities commissioned in 1993 included the Brisay power plant, two of six units at the Laforge-1 plant, and the north portion of the 12th transmission line from the LaGrande complex. Total installed capacity of the Hydro-Quebec system reached 29,131 MW, and total power produced was 131.6 TWh. Total length of transmission and distribution lines in 1993 reached 29,869 km and 100,908 km respectively. 9 figs., 17 tabs

  10. Comparison of Ontario Hydro's performance with world power reactors - 1981

    International Nuclear Information System (INIS)

    Dumka, B.R.

    1982-04-01

    The performance of Ontario Hydro's CANDU reactors in 1981 is compared with that of 123 world nuclear power reactors rated at 500 MW(e) or greater. The report is based on data extracted from publications, as well as correspondence with a number of utilities. The basis used is the gross capacity factor, which is defined as gross unit generation divided by the perfect gross output for the period of interest. The lowest of the published turbine and generator design ratings is used to determine the perfect gross output, unless the unit has been proven capable of consistently exceeding this value. The first six reactors in the rankings were CANDU reactors operated by Ontario Hydro

  11. Developing teaching kit on the use of micro-hydro generator in remote area

    Directory of Open Access Journals (Sweden)

    Desak Made Megawati

    2017-04-01

    Full Text Available The study aimed at: (1 identifying the criteria of teaching kit feasibility for the advantages of micro-hydro generator in remote area; and (2 identifying the effectiveness of teaching kit implementation on the use of micro-hydro generator in remote area in order to improve the students’ concept mastery on SMP Negeri 1 Rampi South Sulawesi. The study was a research and development that adapted the 4D model, which consisted of define, design, develop, and disseminate. The teaching kit that had been developed was a syllabus, lesson plans, student’s worksheet, and assessment instrument. For the data gathering, the researcher implemented the non-test technique, in the form of product validation sheet, student’s worksheet readability questionnaire sheet, teaching implementation sheet, and test technique, in the form of concept mastery test item sheet. The results of the study show that: (1 the teaching kit on the use of micro-hydro generator in remote area that has been developed falls into the “Very Good” category for syllabus, lesson plan, and student’s worksheet; and (2 the implementation of the teaching kit on the use of micro-hydro generator in remote area has been effective to improve the students’ concept mastery in SMP Negeri 1 Rampi South Sulawesi.

  12. Hydro-CT in the detection and staging of pancreatic carcinoma

    International Nuclear Information System (INIS)

    Richter, G.M.; Wunsch, C.; Schneider, B.; Duex, M.; Kauffmann, G.W.; Klar, E.; Seelos, R.

    1998-01-01

    Purpose: To document our experience with spiral hydro-CT of the pancreas based on a combination of pharmacologic intestinal paralysis and water distension of the stomach and duodenum with specific reference to tumor detection rate, differentiation of malignant versus benign tumors and assessment of tumor resectability in a prospective study on 211 consecutive patients. Results: 96% of the examinations were well tolerated. In only 4% was on-site administration of a gastric tube required because of vomiting. In 2% of the patients a slight allergic reaction to the contrast medium was seen. The prevalence of a pancreatic neoplasm was 37,8%. In tumor detection Hydro-CT reached an overall accuracy of 94,8% with a sensitivity of 93,7% and a specificity of 95,2%. 52 patients underwent surgical exploration 34 of whom with tumorfree resection margins (RO resection) corresponding to a resection of 42,5%. In those assessment of resectability reached an overall accuracy of 94,6% with a sensitivity of 91,2% and specificity of 95,6%. Conclusion: The new technique of Hydro-CT based on thin slice and spiral methodology including pharmacologic intestinal paralysis and water distension results in a high tumor detection rate and reliable assessment of resectability. (orig./AJ) [de

  13. Unmanned operation of Hydro Power Plants

    International Nuclear Information System (INIS)

    Regula, E.

    2008-01-01

    Intentions to launch unmanned operation are no news, the very first occurred in Hydro Power Plants (HPP) at the time when the first computer technology was implemented into process of power generation, i.e. no later than in 1960 s . ENEL entering Slovenske elektrarne not only revived but significantly accelerated the implementation process of unmanned operation. Experience of ENEL says that unmanned operation means better reliability of the HPP and this is the priority. (author)

  14. Exploration of hydro-geomorphological indices for coastal floodplain ...

    African Journals Online (AJOL)

    Flood is a reoccurring natural hazard in many parts of Nigeria, and is likely to increase in severity and frequency. Characterization of recently flooded areas was carried out using hydro-morphological indices to identify flood prone areas. In flood risk quantification and identification, hydrodynamic models require vast ...

  15. Resettlement associated with hydro projects in China

    International Nuclear Information System (INIS)

    Anon.

    1993-01-01

    The flow rates of Chinese rivers are subject to major seasonal fluctuations, and as a result large reservoirs have to be constructed for flood control, irrigation, and power generation. As most of the river valleys are densely populated, the relocation and resettlement of people from the reservoir areas are major but unavoidable problems to be addressed in building hydro projects in China. (author)

  16. 78 FR 62350 - FFP Qualified Hydro 14, LLC; Western Minnesota Municipal Power Agency; Notice Announcing...

    Science.gov (United States)

    2013-10-18

    .... 14491-000] FFP Qualified Hydro 14, LLC; Western Minnesota Municipal Power Agency; Notice Announcing... applications were filed by FFP Qualified Hydro 14, LLC for Project No. 13579-002 and Western Minnesota... regular business day. See 18 CFR 385.2001(a)(2) (2013). On October 21, 2013, at 10:00 a.m. (Eastern Time...

  17. Optimal wind-hydro solution for the Marmara region of Turkey to meet electricity demand

    International Nuclear Information System (INIS)

    Dursun, Bahtiyar; Alboyaci, Bora; Gokcol, Cihan

    2011-01-01

    Wind power technology is now a reliable electricity production system. It presents an economically attractive solution for the continuously increasing energy demand of the Marmara region located in Turkey. However, the stochastic behavior of wind speed in the Marmara region can lead to significant disharmony between wind energy production and electricity demand. Therefore, to overcome wind's variable nature, a more reliable solution would be to integrate hydropower with wind energy. In this study, a methodology to estimate an optimal wind-hydro solution is developed and it is subsequently applied to six typical different site cases in the Marmara region in order to define the most beneficial configuration of the wind-hydro system. All numerical calculations are based on the long-term wind speed measurements, electrical load demand and operational characteristics of the system components. -- Research highlights: → This study is the first application of a wind-hydro pumped storage system in Turkey. → The methodology developed in this study is applied to the six sites in the Marmara region of Turkey. A wind - hydro pumped storage system is proposed to meet the electric energy demand of the Marmara region.

  18. Effective Hydro-Mechanical Properties of Fluid-Saturated Fracture Networks

    Science.gov (United States)

    Pollmann, N.; Vinci, C.; Renner, J.; Steeb, H.

    2015-12-01

    Consideration of hydro-mechanical processes is essential for the characterization of liquid-resources as well as for many engineering applications. Furthermore, the modeling of seismic waves in fractured porous media finds application not only in geophysical exploration but also reservoir management. Fractures exhibit high-aspect-ratio geometries, i.e. they constitute thin and long hydraulic conduits. Motivated by this peculiar geometry, the investigation of the hydro-mechanically coupled processes is performed by means of a hybrid-dimensional modeling approach. The effective material behavior of domains including complex fracture patterns in a porous rock is assessed by investigating the fluid pressure and the solid displacement of the skeleton saturated by compressible fluids. Classical balance equations are combined with a Poiseuille-type flow in the dimensionally reduced fracture. In the porous surrounding rock, the classical Biot-theory is applied. For simple geometries, our findings show that two main fluid-flow processes occur, leak-off from fractures to the surrounding rock and fracture flow within and between the connected fractures. The separation of critical frequencies of the two flow processes is not straightforward, in particular for systems containing a large number of fractures. Our aim is to model three dimensional hydro-mechanically coupled processes within complex fracture patterns and in particular determine the frequency-dependent attenuation characteristics. Furthermore, the effect of asperities of the fracture surfaces on the fracture stiffness and on the hydraulic conductivity will be added to the approach.

  19. StarSmasher: Smoothed Particle Hydrodynamics code for smashing stars and planets

    Science.gov (United States)

    Gaburov, Evghenii; Lombardi, James C., Jr.; Portegies Zwart, Simon; Rasio, F. A.

    2018-05-01

    Smoothed Particle Hydrodynamics (SPH) is a Lagrangian particle method that approximates a continuous fluid as discrete nodes, each carrying various parameters such as mass, position, velocity, pressure, and temperature. In an SPH simulation the resolution scales with the particle density; StarSmasher is able to handle both equal-mass and equal number-density particle models. StarSmasher solves for hydro forces by calculating the pressure for each particle as a function of the particle's properties - density, internal energy, and internal properties (e.g. temperature and mean molecular weight). The code implements variational equations of motion and libraries to calculate the gravitational forces between particles using direct summation on NVIDIA graphics cards. Using a direct summation instead of a tree-based algorithm for gravity increases the accuracy of the gravity calculations at the cost of speed. The code uses a cubic spline for the smoothing kernel and an artificial viscosity prescription coupled with a Balsara Switch to prevent unphysical interparticle penetration. The code also implements an artificial relaxation force to the equations of motion to add a drag term to the calculated accelerations during relaxation integrations. Initially called StarCrash, StarSmasher was developed originally by Rasio.

  20. Locked on course: Hydro-Quebec's commitment to mega-projects

    International Nuclear Information System (INIS)

    Maxwell, J.; Briscoe, F.; Suzuki, Tatsujiro; Lee, J.; Stewart, A.

    1997-01-01

    Large organizations often escalate their commitments to mega-project development, even after evidence becomes available of adverse environmental consequences or lack of economic feasibility. This escalation of commitment transcends both sectorial and national boundaries. Preeminent examples include controversial nuclear projects in the US, hydroelectric projects like the Three Gorges Dam in China, and transport projects like the Chunnel and the Concorde. In this article, the authors examine the experience of Hydro-Quebec with the Great Whale Project. They argue that Hydro-Quebec escalated its commitment even after serious questions emerged about its environmental impacts and economic feasibility, because of (1) its earlier success with large projects, (2) its engineering culture''s norms for consistency, and (3) its role in the government''s desire for economic and cultural autonomy. Finally, they discuss the changes that are necessary to break commitments to such projects

  1. An environmental data base for all Hydro-Quebec reservoirs

    International Nuclear Information System (INIS)

    Demers, C.

    1988-01-01

    Hydro-Quebec has created two management positions specifically for reservoirs, namely Reservoir Ecology Advisor and Reservoir Management Advisor. To assist management decisions, a means was required of bringing together all existing environmental information for each reservoir operated by Hydro-Quebec, including storage reservoirs, auxiliary reservoirs and forebays. A relational database using Reflex software was developed on a network of Macintosh computers. The database contains five blocks of information: general information, and physical, physiochemical, biologic and socioeconomic characteristics for each reservoir. Data will be collected on over 100 sites, and the tool will form the basis for developing a medium-range study program on reservoir ecology. The program must take into account the physical, biological and socioeconomic aspects of the environment, as well as the concerns of management personnel operating the reservoirs, the local population, reservoir users, and various government departments. 2 figs

  2. The hydro-mechanical modeling of the fractured media; Modelisation hydromecanique des milieux fractures

    Energy Technology Data Exchange (ETDEWEB)

    Kadiri, I

    2002-10-15

    The hydro-mechanical modeling of the fractured media is quite complex. Simplifications are necessary for the modeling of such media, but, not always justified, Only permeable fractures are often considered. The rest of the network is approximated by an equivalent continuous medium. Even if we suppose that this approach is validated, the hydraulic and mechanical properties of the fractures and of the continuous medium are seldom known. Calibrations are necessary for the determination of these properties. Until now, one does not know very well the nature of measurements which must be carried out in order to carry on a modeling in discontinuous medium, nor elements of enough robust validation for this kind of modeling. For a better understanding of the hydro-mechanical phenomena in fractured media, two different sites have been selected for the work. The first is the site of Grimsel in Switzerland in which an underground laboratory is located at approximately 400 m of depth. The FEBEX experiment aims at the in-situ study of the consecutive phenomena due to the installation of a heat source representative of radioactive waste in the last 17 meters of the FEBEX tunnel in the laboratory of Grimsel. Only, the modeling of the hydro-mechanical of the excavation was model. The modeling of the Febex enabled us to establish a methodology of calibration of the hydraulic properties in the discontinuous media. However, this kind of study on such complex sites does not make possible to answer all the questions which arise on the hydro-mechanical behavior of the fractured media. We thus carried out modeling on an other site, smaller than the fist one and more accessible. The experimental site of Coaraze, in the Maritime Alps, is mainly constituted of limestone and fractures. Then the variation of water pressure along fractures is governed by the opening/closure sequence of a water gate. Normal displacement as well as the pore pressure along these fractures are recorded, and then

  3. 75 FR 47808 - Verde Hydro, LLC; Notice of Preliminary Permit Application Accepted for Filing and Soliciting...

    Science.gov (United States)

    2010-08-09

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project No. 13819-000] Verde Hydro, LLC... Intervene, and Competing Applications August 2, 2010. On July 21, 2010, Verde Hydro, LLC filed an... the feasibility of the Verde Hydroelectric Project, located in Maricopa County, in the State of...

  4. 76 FR 24014 - Renew Hydro, LLC; Notice of Preliminary Permit Application Accepted for Filing and Soliciting...

    Science.gov (United States)

    2011-04-29

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project No. 13872-000] Renew Hydro, LLC... Intervene, and Competing Applications On October 19, 2010, Renew Hydro, LLC filed an application for a...) a new powerhouse; (3) a crest-mounted walkway carrying hydraulic and electrical conduits; (4) one...

  5. 76 FR 49462 - Newfound Hydroelectric Company, KTZ Hydro, LLC; Notice of Application for Transfer of License...

    Science.gov (United States)

    2011-08-10

    ... Hydroelectric Company, KTZ Hydro, LLC; Notice of Application for Transfer of License, and Soliciting Comments and Motions To Intervene On July 25, 2011, Newfound Hydroelectric Company (transferor) and KTZ Hydro, LLC (transferee) filed an application for transfer of license for the Newfound Hydroelectric Project...

  6. The Hydro-Economic Interdependency of Cities: Virtual Water Connections of the Phoenix, Arizona Metropolitan Area

    Directory of Open Access Journals (Sweden)

    Richard R. Rushforth

    2015-06-01

    Full Text Available Water footprinting has revealed hydro-economic interdependencies between distant global geographies via trade, especially of agricultural and manufactured goods. However, for metropolitan areas, trade not only entails commodity flows at many scales from intra-municipal to global, but also substantial intra-metropolitan flows of the skilled labor that is essential to a city’s high-value economy. Virtual water flows between municipalities are directly relevant for municipal water supply policy and infrastructure investment because they quantify the hydro-economic dependency between neighboring municipalities. These municipalities share a physical water supply and also place demands on their neighbors’ water supplies by outsourcing labor and commodity production outside the municipal and water supply system boundary to the metropolitan area. Metropolitan area communities span dense urban cores to fringe agricultural towns, spanning a wide range of the US hydro-economy. This study quantifies water footprints and virtual water flows of the complete economy of the Phoenix Metropolitan Area’s municipalities. A novel approach utilized journey to work data to estimate virtual water flows embedded in labor. Commodities dominate virtual water flows at all scales of analysis, however labor is shown to be important for intra-metropolitan virtual water flows. This is the first detailed water footprint analysis of Phoenix, an important city in a water-scarce region. This study establishes a hydro-economic typology for communities to define several niche roles and decision making points of view. This study’s findings can be used to classify communities with respect to their relative roles, and to benchmark future improvements in water sustainability for all types of communities. More importantly, these findings motivate cooperative approaches to intra-metropolitan water supply policy that recognize the hydro-economic interdependence of these

  7. Research on evaluation of coupled thermo-hydro-mechanical phenomena in the near-field

    International Nuclear Information System (INIS)

    Chijimatsu, Masakazu; Imai, Hisashi; Fukutome, Kazuhito; Kayukawa, Koji; Sasaki, Hajime; Moro, Yoshiji

    2004-02-01

    After emplacement of the engineered barrier system (EBS), it is expected that the near-field environment will be impacted by phenomena such as heat dissipation by conduction and other heat transfer mechanisms, infiltration of groundwater from the surrounding rock in the engineered barrier system, stress imposed by the overburden pressure and generation of swelling pressure in the buffer due to water infiltration. In order to recognize and evaluate these coupled thermo-hydro-mechanical (THM) phenomena, it is necessary to make a confidence of the mathematical models and computer codes. Evaluating these coupled THM phenomena is important in order to clarify the initial transient behavior of the EBS within the near field. DECOVALEX project is an international co-operative project for the DEvelopment of COupled models and their VALidation against EXperiments in nuclear waste isolation and it is significance to participate this project and to apply the code for the validation. Therefore, we tried to apply the developed numerical code against the subjects of DECOVALEX. We carried out the simulation against the Task 1 (simulation of FEBEX in-situ full-scale experiment), Task 3 BMT1 (Bench Mark Test against the near field coupling phenomena) and Task 3 BMT2 (Bench Mark Test against the up-scaling of fractured rock mass). This report shows the simulation results against these tasks. Furthermore, technical investigations about the in-situ full-scale experiment (called Prototype Repository Project) in Aespoe HRL facility by SKB of Sweden were performed. In order to evaluate the coupled phenomena in the engineered barrier, we use the new swelling model based on the theoretical approach. In this paper, we introduce the modeling approach and applicability about the new model. (author)

  8. THREE-DIMENSIONAL BOLTZMANN HYDRO CODE FOR CORE COLLAPSE IN MASSIVE STARS. I. SPECIAL RELATIVISTIC TREATMENTS

    International Nuclear Information System (INIS)

    Nagakura, Hiroki; Sumiyoshi, Kohsuke; Yamada, Shoichi

    2014-01-01

    We propose a novel numerical method for solving multi-dimensional, special relativistic Boltzmann equations for neutrinos coupled with hydrodynamics equations. This method is meant to be applied to simulations of core-collapse supernovae. We handle special relativity in a non-conventional way, taking account of all orders of v/c. Consistent treatment of the advection and collision terms in the Boltzmann equations has been a challenge, which we overcome by employing two different energy grids: Lagrangian remapped and laboratory fixed grids. We conduct a series of basic tests and perform a one-dimensional simulation of core-collapse, bounce, and shock-stall for a 15 M ☉ progenitor model with a minimum but essential set of microphysics. We demonstrate in the latter simulation that our new code is capable of handling all phases in core-collapse supernova. For comparison, a non-relativistic simulation is also conducted with the same code, and we show that they produce qualitatively wrong results in neutrino transfer. Finally, we discuss a possible incorporation of general relativistic effects into our method

  9. Development of coal hydro gasification technology

    International Nuclear Information System (INIS)

    Itoh, Kazuo; Nomura, Kazuo; Asaoka, Yoshikiyo; Kato, Shojiro; Seo, Tomoyuki

    1997-01-01

    Taking a potential future decrease in natural gas supply into consideration, we are looking for a way to secure a stable supply of high quality substitute natural gas made from coal (which occurs abundantly throughout the world) in large volumes at low cost. We are working towards our goal of commercializing coal hydro gasification technology in the 2010's and have started developing elemental technology from FY, 1996 as a part of the governmental new energy program. (au)

  10. Assessment of small versus large hydro-power developments - a Norwegian case study

    Energy Technology Data Exchange (ETDEWEB)

    Bakken, Tor Haakon; Harby, Atle

    2010-07-01

    Full text: The era of new, large hydro-power development projects seems to be over in Norway. Partly as a response to this, a large number of applications for the development of smallscale hydro power projects up to 10 MW overflow the Water Resources and Energy Directorate, resulting in an extensive development of small tributaries and water courses in Norway. This study has developed a framework for the assessment and comparison of several small versus many large hydro-power projects based on a multi-criteria analysis (MCA) approach, and further tested this approach on planned or developed projects in the Helgeland region, Norway. Multi-criteria analysis is a decision-support tool aimed at providing a systematic approach for the comparison of various alternatives with often non-commensurable and conflicting attributes. At the same time, the technique enables complex problems and various alternatives to be assessed in a transparent and simple way. The MCA-software was in our case equipped with 2 overall criteria (objectives) with a number of sub criteria; Production with sub-criteria like volume of energy production, installed effect, storage capacity and economical profit; Environmental impacts with sub-criteria like fishing interests, biodiversity, protection of unexploited nature The data used in the case study is based on the planned development of Vefsna (large project) with the energy/effect production estimated and the environmental impacts identified as part of the feasibility studies (the project never reached the authorities' licensing system with a formal EIA). The small-scale hydro-power projects used for comparison are based on realized projects in the Helgeland region and a number of proposed projects, up scaled to the size of the proposed Vefsna-development. The results from the study indicate that a large number of small-scale hydro-power projects need to be implemented in order to balance the volume of produced electricity/effect from one

  11. Margins for uncertainties in Hydro-Quebec's short-term operations planning

    International Nuclear Information System (INIS)

    Beaumont, M.; Raymond, M.P.

    1995-01-01

    A method developed by Hydro-Quebec for establishing the short-term capacity margin requirements for dealing with uncertainties from 1 to 24 hours in advance, was presented. Hydro-Quebec's generating system and characterization of the problems associated with meeting load requirements were discussed. Factors accounted for included those concerning internal load forecast, unit forced outages, risks of not meeting firm load, risks of not meeting real-time reserves requirements, costs, time delays, and operating constraints of non-hydraulic resources. Each of these were described in detail, and methods for combining mathematical uncertainties were presented. Procedures used for selecting an appropriate risk level and building a margin policy were described. Improvements for more accurate modelling were discussed. 5 refs., 2 tabs., 5 figs

  12. 75 FR 11153 - Hydro Energy Technologies, LLC; Notice of Preliminary Permit Application Accepted for Filing and...

    Science.gov (United States)

    2010-03-10

    ...-long gravity dam; (2) a existing 36-acre impoundment with a storage capacity of 250 acre feet.; (3) an... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project No. 13627-000] Hydro Energy..., Motions To Intervene, and Competing Applications March 1, 2010. On November 6, 2009, Hydro Energy...

  13. The contribution of small hydro power stations to the electricity generation in Greece: Technical and economic considerations

    International Nuclear Information System (INIS)

    Kaldellis, J.K.

    2007-01-01

    Hydropower is the most widely used renewable energy source worldwide, contributing almost with 18.5% to the fulfillment of the planet electricity generation. However, most locations in Europe appropriate for the installation of large hydro power stations have already been exploited. Furthermore, there is a significant local communities' opposition towards new large power stations; hence, small hydro power stations remain one of the most attractive opportunities for further utilization of the available hydro potential. Greece and more precisely the country's mainland possesses a significant hydro-power potential which is up to now only partially exploited. In parallel, a large number of private investors have officially expressed their interest in creating small hydro power stations throughout the country, encouraged by the significant Greek State subsidy opportunities for renewable energy applications. However, up to now a relatively small number of projects have been realized, mainly due to decision-making problems, like the administrative bureaucracy, the absence of a rational national water resources management plan and the over-sizing of the proposed installations. Certainly, if the above problems are suitably treated, small hydro-power plants can be proved considerably profitable investments, contributing also remarkably to the national electricity balance and replacing heavy polluting lignite and imported oil. In the context of the above interesting issues, the present study reviews in detail the existing situation of small hydropower plants in Greece and investigates their future prospects as far as the energy, economic and environmental contribution are concerned

  14. Some impacts and mitigations for small hydro developments in Newfoundland and Labrador

    International Nuclear Information System (INIS)

    Buchanan, R.

    1993-01-01

    Potential adverse impacts of small hydro power plants were defined and some of the mitigative techniques that can be used to eliminate or alleviate these impacts were outlined. Potential adverse impacts involved in the construction of hydro projects were identified as those associated with construction of dams, borrow areas, access roads, powerhouses, canals, penstocks, and transmission lines. Fish passage and fish habitat maintenance were also among the major issues that confront most of the proposed small hydro projects in Newfoundland. Fish passage and habitat issues received particular attention in view of their obvious importance in a province where fishing is a way of life for large segments of the population. Major challenges included both upstream and downstream fish passage, and maintenance flows downstream of dams. Upstream migration could be facilitated by fishways. Downstream migration of Atlantic salmon smolts was said to be more problematic, but could be addressed by strategies such as intake design, screens, bypasses, sluices, turbine selection, plant shutdowns at critical times and operation of turbines at peak efficiencies. 12 refs., 2 tabs

  15. Current status and future developments of small and micro hydro in southern Africa

    CSIR Research Space (South Africa)

    Jonker Klunne, W

    2012-05-01

    Full Text Available -1 Current status and future developments of small and micro hydro in southern Africa Wim Jonker Klunne Council for Scientific and Industrial Research (CSIR) PO Box 395 Pretoria 0001 South Africa Introduction Small and micro hydropower... are renewable energy technologies that have large potential in the south- ern African region, both for grid and off-grid applications. Within the region a good understanding exists on the potential for large scale hydro with a substantial number of plants...

  16. Linking CATHENA with other computer codes through a remote process

    Energy Technology Data Exchange (ETDEWEB)

    Vasic, A.; Hanna, B.N.; Waddington, G.M. [Atomic Energy of Canada Limited, Chalk River, Ontario (Canada); Sabourin, G. [Atomic Energy of Canada Limited, Montreal, Quebec (Canada); Girard, R. [Hydro-Quebec, Montreal, Quebec (Canada)

    2005-07-01

    starts, ends, controls, receives boundary conditions from CATHENA, calls ELOCA-IST subroutines for computation and sends feedback to CATHENA through PVM calls. The benefit of this dynamic link is that CATHENA's GENeralized Heat Transfer Package (GENHTP) is replaced with a specialized detailed model for CANDU fuel elements. The stand-alone plant conTROL Gentilly-2 (TROLG2) program, developed jointly by AECL and Hydro-Quebec, simulates the control system of the Gentilly-2 generating station operated by Hydro Quebec. The dynamic link with a CATHENA plant idealization couples the thermalhydraulic reactor behavior to reactor control system behavior of the Gentilly-2 generating station plant during transient conditions. CATHENA can perform simulations of CANDU channels by dynamically linking with one or more ELOCA driver programs. Each link to an independent instance of the ELOCA driver program is associated with one fuel element having up to 20 axial nodes (current ELOCA-IST limit) and one circumferential segment. Figure 1 in the full paper shows graphically the data transfers involved in the connection between the CATHENA and ELOCA driver through the PVM interface. Variables transferred from CATHENA to ELOCA-IST at each time step are: number of axial segments; number of circumferential segments (currently one only); coolant pressure; coolant temperature; sheath-to-coolant heat transfer coefficient; thermal radiation heat flux; and, power fraction. Variables that are returned for each axial segment from ELOCA-IST are: fuel sheath temperature; fuel element outer diameter; and, fuel length. CATHENA linked with ELOCA through PVM allows independent development of separate codes and achieves direct coupling during execution ensuring convergence between the codes. This coupling also eliminates the preparation and conversion of data transfer necessary between the codes by an analyst. This coupling process saves analyst time while reducing the possibility of inadvertent errors

  17. Linking CATHENA with other computer codes through a remote process

    International Nuclear Information System (INIS)

    Vasic, A.; Hanna, B.N.; Waddington, G.M.; Sabourin, G.; Girard, R.

    2005-01-01

    , controls, receives boundary conditions from CATHENA, calls ELOCA-IST subroutines for computation and sends feedback to CATHENA through PVM calls. The benefit of this dynamic link is that CATHENA's GENeralized Heat Transfer Package (GENHTP) is replaced with a specialized detailed model for CANDU fuel elements. The stand-alone plant conTROL Gentilly-2 (TROLG2) program, developed jointly by AECL and Hydro-Quebec, simulates the control system of the Gentilly-2 generating station operated by Hydro Quebec. The dynamic link with a CATHENA plant idealization couples the thermalhydraulic reactor behavior to reactor control system behavior of the Gentilly-2 generating station plant during transient conditions. CATHENA can perform simulations of CANDU channels by dynamically linking with one or more ELOCA driver programs. Each link to an independent instance of the ELOCA driver program is associated with one fuel element having up to 20 axial nodes (current ELOCA-IST limit) and one circumferential segment. Figure 1 in the full paper shows graphically the data transfers involved in the connection between the CATHENA and ELOCA driver through the PVM interface. Variables transferred from CATHENA to ELOCA-IST at each time step are: number of axial segments; number of circumferential segments (currently one only); coolant pressure; coolant temperature; sheath-to-coolant heat transfer coefficient; thermal radiation heat flux; and, power fraction. Variables that are returned for each axial segment from ELOCA-IST are: fuel sheath temperature; fuel element outer diameter; and, fuel length. CATHENA linked with ELOCA through PVM allows independent development of separate codes and achieves direct coupling during execution ensuring convergence between the codes. This coupling also eliminates the preparation and conversion of data transfer necessary between the codes by an analyst. This coupling process saves analyst time while reducing the possibility of inadvertent errors and additionally

  18. Sizing of a wind-hydro system using a reversible hydraulic facility with seawater. A case study in the Canary Islands

    International Nuclear Information System (INIS)

    Portero, Ulises; Velázquez, Sergio; Carta, José A.

    2015-01-01

    Highlights: • A model of a wind-hydro system is developed associated to a specific demand. • A particular case on islands with a weak electrical system is simulated. • A reversible seawater-based pumped-hydro system associated to a wind farm is sized. • The economic benefit of the resulting wind-hydro system is calculated. - Abstract: While the climatic conditions of the Canary Islands (Spain) are highly favourable for wind and solar energy exploitation, the low freshwater reserves are a problem when considering the implementation of hydro-based systems. For this reason, the pumped hydro storage (PHS) systems that have been proposed on the islands and which aim to exploit the available freshwater include an additional seawater desalination process. Given this drawback, this paper proposes an original alternative: a reversible PHS facility which directly uses seawater with the system in this case located on the coast of Gran Canaria island. This facility would be used to manage and better integrate the energy generated by a wind farm into a weak insular electrical system. An analysis is also undertaken of the economic benefits the proposed wind-hydro system would entail for the island’s electrical system. As a result of the incorporation of the hydraulic unit, the contribution of the wind-hydro system in satisfying electricity demand is 29% higher than if a wind-only system is used. The electrical energy generation cost of the wind-hydro system amounts to 95.34 €/MW h, entailing an annual saving for the electrical system of 7.68 M€/year.

  19. The Nothuesli small hydro project; Wasserkraftwerk Nothuesli, Gonzenbaechli - Vorprojekt

    Energy Technology Data Exchange (ETDEWEB)

    Balachandran, S.; Jorde, K.

    2008-07-01

    This report for the Swiss Federal Office of Energy (SFOE) discusses the project for a small 16-kilowatt hydro plant on the Gonzenbaechli stream in eastern Switzerland. The site, which was used even before 1860 for obtaining power from the stream is briefly described, as are the present remains of earlier installations. An old Francis turbine has been retrieved and could possibly be reused. Water-flow figures and fall-heights are noted. Design flows and residual water quantities required by legislation are noted and discussed, as are the geology and topology of the catchment area. The proposals for a new hydro-power plant are described, including the apparatus proposed with a power of 20 kVA. Environmental aspects are also discussed, as are the investment costs and the economic viability of the project. The paper is completed with a comprehensive appendix, including detailed cost estimates.

  20. BC Hydro best practices : energy efficiency and integrated planning

    International Nuclear Information System (INIS)

    Henriques, D.

    2004-01-01

    The key elements to success in energy efficiency include integrated energy planning, a review of conservation potential, pursuing a target, risk sharing between all parties, and long term planning when making investments in demand side management (DSM). The barriers to cost effective energy efficiency investment were also outlined along with the scope of the conservation potential review which included 95 per cent of electricity end use applications in all market sectors including residential, commercial, institutional and industrial. BC Hydro's Power Smart program focuses on energy efficiency and load displacement to meet 35 per cent of the utility's forecasted growth by 2012. The sources of savings within each of the market sectors were identified. Key recommendations regarding energy efficiency and conservation were also presented with reference to financial incentives offered by BC Hydro to consumers to encourage a switch to more efficient lighting systems. 10 figs

  1. Modeling detailed hydro-meteorological surfaces and runoff response in large diverse watersheds

    International Nuclear Information System (INIS)

    Byrne, J.; Kienzle, S.W.; MacDonald, R.J.

    2008-01-01

    An understanding of local variability in climatic conditions over complex terrain is imperative to making accurate assessments of impacts from climate change on fresh water ecosystems (Daly, 2006). The derivation of representative spatial data in diverse environments poses a significant challenge to the modelling community. This presentation describes the current status of a long term ongoing hydro-climate model development program. We are developing a gridded hydroclimate dataset for diverse watersheds using SimGrid (Larson, 2008; Lapp et al., 2005; Sheppard, 1996), a model that applies the Mountain Climate Model (MTCLIM; Hungerford et al., 1989) to simulate hydro-climatic conditions over diverse terrain. The model uses GIS based terrain categories (TC) classified by slope, aspect, elevation, and soil water storage. SimGrid provides daily estimates of solar radiation, air temperature, relative humidity, precipitation, snowpack and soil water storage over space. Earlier versions of the model have been applied in the St. Mary (Larson, 2008) and upper Oldman basins (Lapp et al., 2005), giving realistic estimates of hydro-climatic variables. The current study demonstrates improvements to the estimation of temperature, precipitation, snowpack, soil water storage and runoff from the basin. Soil water storage data for the upper drainage were derived with GIS and included in SimGrid to estimate soil water flux over the time period. These changes help improve the estimation of spatial climatic variability over the basin while accounting for topographical influence. In further work we will apply spatial hydro-climatic surfaces from the SimGrid model to assess the hydrologic response to environmental change for watersheds in Canada and beyond. (author)

  2. A sliding point contact model for the finite element structures code EURDYN

    International Nuclear Information System (INIS)

    Smith, B.L.

    1986-01-01

    A method is developed by which sliding point contact between two moving deformable structures may be incorporated within a lumped mass finite element formulation based on displacements. The method relies on a simple mechanical interpretation of the contact constraint in terms of equivalent nodal forces and avoids the use of nodal connectivity via a master slave arrangement or pseudo contact element. The methodology has been iplemented into the EURDYN finite element program for the (2D axisymmetric) version coupled to the hydro code SEURBNUK. Sample calculations are presented illustrating the use of the model in various contact situations. Effects due to separation and impact of structures are also included. (author)

  3. Development of Manitoba Hydro's public water safety around dams management guidelines

    Energy Technology Data Exchange (ETDEWEB)

    Bonin, Dave; McPhail, Gord; Murphy, Shayla; Schellenberg, Gord [KGS Acres, Winnipeg, (Canada); Read, Nick [Manitoba Hydro, Winnipeg, (Canada)

    2010-07-01

    Several drowning fatalities and safety incidents have occurred around dams in Ontario, Manitoba and other jurisdictions in Canada. Following these incidents, Manitoba Hydro implemented several measures to improve public safety around its dams with the development of a warning signs manual. Manitoba Hydro found that a standard centralized approach to the process of improving public safety is better for ensuring compliance and consistency, even though they have safety measures in place. This paper described the process that Manitoba Hydro has followed in developing a formal set of public water safety around dams (PWSD) guidelines and a program for implementing these guidelines. This program was developed with the intent of providing a high standard of public protection and continuous improvement and monitoring on par with the effect spent on similar dam safety type programs. This paper focused on the development of the pilot PWSD management plan for Pine Falls generating station in order to test the effectiveness and usability of the guidelines.

  4. DAILY SCHEDULING OF SMALL HYDRO POWER PLANTS DISPATCH WITH MODIFIED PARTICLES SWARM OPTIMIZATION

    Directory of Open Access Journals (Sweden)

    Sinvaldo Rodrigues Moreno

    2015-04-01

    Full Text Available This paper presents a new approach for short-term hydro power scheduling of reservoirs using an algorithm-based Particle Swarm Optimization (PSO. PSO is a population-based algorithm designed to find good solutions to optimization problems, its characteristics have encouraged its adoption to tackle a variety of problems in different fields. In this paper the authors consider an optimization problem related to a daily scheduling of small hydro power dispatch. The goal is construct a feasible solution that maximize the cascade electricity production, following the environmental constraints and water balance. The paper proposes an improved Particle Swarm Optimization (PSO algorithm, which takes advantage of simplicity and facility of implementation. The algorithm was successfully applied to the optimization of the daily schedule strategies of small hydro power plants, considering maximum water utilization and all constraints related to simultaneous water uses. Extensive computational tests and comparisons with other heuristics methods showed the effectiveness of the proposed approach.

  5. Joint atmospheric-terrestrial water balances for East Africa: a WRF-Hydro case study for the upper Tana River basin

    Science.gov (United States)

    Kerandi, Noah; Arnault, Joel; Laux, Patrick; Wagner, Sven; Kitheka, Johnson; Kunstmann, Harald

    2018-02-01

    For an improved understanding of the hydrometeorological conditions of the Tana River basin of Kenya, East Africa, its joint atmospheric-terrestrial water balances are investigated. This is achieved through the application of the Weather Research and Forecasting (WRF) and the fully coupled WRF-Hydro modeling system over the Mathioya-Sagana subcatchment (3279 km2) and its surroundings in the upper Tana River basin for 4 years (2011-2014). The model setup consists of an outer domain at 25 km (East Africa) and an inner one at 5-km (Mathioya-Sagana subcatchment) horizontal resolution. The WRF-Hydro inner domain is enhanced with hydrological routing at 500-m horizontal resolution. The results from the fully coupled modeling system are compared to those of the WRF-only model. The coupled WRF-Hydro slightly reduces precipitation, evapotranspiration, and the soil water storage but increases runoff. The total precipitation from March to May and October to December for WRF-only (974 mm/year) and coupled WRF-Hydro (940 mm/year) is closer to that derived from the Climate Hazards Group Infrared Precipitation with Stations (CHIRPS) data (989 mm/year) than from the TRMM (795 mm/year) precipitation product. The coupled WRF-Hydro-accumulated discharge (323 mm/year) is close to that observed (333 mm/year). However, the coupled WRF-Hydro underestimates the observed peak flows registering low but acceptable NSE (0.02) and RSR (0.99) at daily time step. The precipitation recycling and efficiency measures between WRF-only and coupled WRF-Hydro are very close and small. This suggests that most of precipitation in the region comes from moisture advection from the outside of the analysis domain, indicating a minor impact of potential land-precipitation feedback mechanisms in this case. The coupled WRF-Hydro nonetheless serves as a tool in quantifying the atmospheric-terrestrial water balance in this region.

  6. 77 FR 20808 - Black Bear Hydro Partners, LLC; Notice of Application Accepted for Filing, Ready for...

    Science.gov (United States)

    2012-04-06

    ... March 14, 2012. d. Applicant: Black Bear Hydro Partners, LLC. e. Name of Projects: Orono Project 2710.... 791a-825r. h. Applicant Contact: Mr. Scott D. Hall, Black Bear Hydro Partners, LLC, P.O. Box 276... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project Nos. 2710-057; 2712-074] Black...

  7. Hydro-electric power project on the Toulnustouc River

    International Nuclear Information System (INIS)

    Rochon, Y.; Morneau, J.; Lefebvre, G.

    2001-01-01

    Hydro-Quebec has proposed the development of a hydro-electric power project on the Toulnustouc River, located between Saint-Anne Lake and Manic Reservoir. The work would involve the construction of a power generation plant of 526 MW, construction of a 77 m dam on the Toulnustouc River, 14 km downstream from the existing Lac-Saint-Anne dam, the creation of a new water expanse covering 22 square kilometers, the construction of an embankment, the strengthening of the existing Saint-Anne embankment, digging a 9.8 km gallery, and the construction of a flood spillway. This work would have consequences for three different sectors of the river: between the existing and the proposed dam, between the dam and the projected power plant, and between the power plant and the limit of the influence of the reservoir Manic-2. Hydro-Quebec would like the work to begin in July 2001, with the aim of having the plant in operation in 2005. The overall cost of the project is estimated at 600 million dollars. It is expected that the economic benefits for the region would be in the 211 million dollar range. An environmental assessment of the entire project was performed by Quebec Ministere de l'Environnement. The authors determined that the project was recognized as justified by the Ministere des Ressources Naturelles (Natural Resources Ministry) and concluded that the project was acceptable from an environmental point of view as long as six conditions were met. They touched on the construction of a flood spillway capable of evacuating 19 cubic meters per second at any time during the year, that water be evacuated downstream following a pre-determined debit that varies according to the time of year, monitoring of the brook trout population and its habitat, and environmental monitoring. 46 refs., 7 tabs., 2 figs., 1 annex

  8. Hydro and nuclear power for African less-carbon development

    Energy Technology Data Exchange (ETDEWEB)

    El-Gazzar, Mohamed; Ibrahim, Yassin Mohamed; Bedrous, Maher Aziz

    2007-07-01

    Though the overall picture reveal availability of enormous energy resources which far exceed energy requirements of Africa, most of these resources are grossly underutilized, particularly hydro and nuclear resources. It suggests that Africa's problem is not lack of energy resources but its development and utilization. The region will remain a major net exporter of energy for several decades to com. In dealing with its energy problems Africa faces a unique set of initial conditions, defined mainly by its level and pattern of economic growth, social and demographic characteristics, energy resource endowment, location distances between supply sources and consumption areas, technological underdevelopment, and poverty-driven energy-environment conflict. A key challenge is the optimal utilization of the Africa's energy resources to facilitate both individual country and regional energy and economic development. Stronger emphasis on a more integrated energy supply network based on more widespread regional initiatives, particularly in electricity is essential to sustainable energy development in Africa. This paper discusses the prospects for hydro and nuclear power in Africa. The continent is the poorest in the world. The lack of reliable, accessible and affordable energy hinders its development. Hydro and nuclear power promises to be the least-carbon energy sources, while being the cheapest and most reliable among all. The role the hydropower can play in securing a sustainable energy future for Africa is highly emphasized. Also, nuclear power has many advantages to Africa. Opportunities for hydropower and nuclear power in Africa are all considered. Advantages and disadvantages are also all discussed. (auth)

  9. Spatial heterogeneities and variability of karst hydro-system : insights from geophysics

    Science.gov (United States)

    Champollion, C.; Fores, B.; Lesparre, N.; Frederic, N.

    2017-12-01

    Heterogeneous systems such as karsts or fractured hydro-systems are challenging for both scientist and groundwater resources management. Karsts heterogeneities prevent the comparison and moreover the combination of data representative of different scales: borehole water level can generally not be used directly to interpret spring flow dynamic for example. The spatial heterogeneity has also an impact on the temporal variability of groundwater transfer and storage. Karst hydro-systems have characteristic non linear relation between precipitation amount and discharge at the outlets with threshold effects and a large variability of groundwater transit times In the presentation, geophysical field experiments conducted in karst hydro-system in the south of France are used to investigate groundwater transfer and storage variability at a scale of a few hundred meters. We focus on the added value of both geophysical time-lapse gravity experiments and 2D ERT imaging of the subsurface heterogeneities. Both gravity and ERT results can only be interpreted with large ambiguity or some strong a priori: the relation between resistivity and water content is not unique; almost no information about the processes can be inferred from the groundwater stock variations. The present study demonstrate how the ERT and gravity field experiments can be interpreted together in a coherent scheme with less ambiguity. First the geological and hydro-meteorological context is presented. Then the ERT field experiment including the processing and the results are detailed in the section about geophysical imaging of the heterogeneities. The gravity double difference (S2D) time-lapse experiment is described in the section about geophysical monitoring of the temporal variability. The following discussion demonstrate the impact of both experiments on the interpretation in terms of processes and heterogeneities.

  10. BC Hydro's smart grid strategy within a global transformation

    Energy Technology Data Exchange (ETDEWEB)

    Zucker, R. [BC Hydro, Vancouver, BC (Canada). Smart Grid Development Program

    2009-07-01

    Electric utilities are now examining methods of ensuring adequate supply and energy security for the future. This presentation discussed BC Hydro's smart grid program within the context of other global automated metering initiatives. Over 60 per cent of the United States' gross domestic product (GDP) is derived from industries and services dependent on electricity. Power outages and interruptions cost the country an estimated $150 billion per year. A more efficient and reliable grid will provide $1.8 trillion in annual additive revenue by 2020. BC Hydro currently has over 1.8 million customers, and is comprised of 41 dam sites, 30 hydro facilities, and 9 thermal units. The utility has over 18,000 km of transmission lines and 56,000 km of distribution lines. The province's energy plan hopes to achieve energy self-sufficiency by 2016, and all new electric generation will be net zero greenhouse gas (GHG) or serve as an offset for GHG emissions. The BC Hydro smart meter program will help to support the utility's conservation program. The smart grid will include fundamental applications for metering, meter data management, distribution automation and management, and substation automation. The foundation of the smart meter system is comprised of IT and telecommunications infrastructure and a circuit topology. Reliability and power quality improvements of 40 per cent are anticipated, as well as significant improvements in energy efficiency and customer service. Smart grid applications are being designed for microgrids and plug-in vehicles. A voltage control system has been designed to allow the real time management of energy flows. It was concluded that smart grid programs will provide significant benefits to utility customers and communities in the province. tabs., figs.

  11. Scheduling of head-sensitive cascaded hydro systems : a comparison based on numerical simulation results

    Energy Technology Data Exchange (ETDEWEB)

    Catalao, J.P.S.; Mariano, S.J.P.S. [Beira Interior Univ., Covilha (Portugal). Dept. of Electromechanical Engineering; Mendes, V.M.F. [Superior Engineering Inst. of Lisbon, Lisbon (Portugal). Dept. of Electrical Engineering and Automation; Ferreira, L.A.F.M. [Technical Univ. of Lisbon, Superior Technical Inst., Lisbon (Portugal). Dept. of Electrical Engineering and Computers

    2008-07-01

    The electric power sector in Portugal and Spain has shifted from a traditional monopoly to a deregulated, competitive energy market. As such, hydroelectric facilities face the optimal challenge of how to make a profit by managing water resources without compromising future potential profit. As such, hydro scheduling is a key activity for hydroelectric power utilities because of its significant economic impact. It involves the optimal management of water inflows and storage in reservoirs. This paper considered the problem of short-term hydro scheduling, concerning head-sensitive cascaded reservoirs, and the algorithmic aspects of its solution. The authors proposed and compared optimization methods based on dynamic programming, and linear and nonlinear network programming. The comparison revealed a negligible extra computational effort in a realistic cascaded hydro system where the head depended on the stored water volume. 17 refs., 3 tabs., 7 figs.

  12. Scheduling of head-sensitive cascaded hydro systems : a comparison based on numerical simulation results

    International Nuclear Information System (INIS)

    Catalao, J.P.S.; Mariano, S.J.P.S.; Mendes, V.M.F.; Ferreira, L.A.F.M.

    2008-01-01

    The electric power sector in Portugal and Spain has shifted from a traditional monopoly to a deregulated, competitive energy market. As such, hydroelectric facilities face the optimal challenge of how to make a profit by managing water resources without compromising future potential profit. As such, hydro scheduling is a key activity for hydroelectric power utilities because of its significant economic impact. It involves the optimal management of water inflows and storage in reservoirs. This paper considered the problem of short-term hydro scheduling, concerning head-sensitive cascaded reservoirs, and the algorithmic aspects of its solution. The authors proposed and compared optimization methods based on dynamic programming, and linear and nonlinear network programming. The comparison revealed a negligible extra computational effort in a realistic cascaded hydro system where the head depended on the stored water volume. 17 refs., 3 tabs., 7 figs

  13. Discussion paper : financial strategies for the use of proceeds from the sale of Brampton Hydro

    International Nuclear Information System (INIS)

    2001-11-01

    In October 2000, following changes to the structure of Ontario's electricity industry, the City of Brampton negotiated the sale of Brampton Hydro to Hydro One for $260.2 million. The City Council had determined that the sale would offer the best combination of potential operating efficiencies, reliability of service and rate stability for customers and protection of jobs for employees of Brampton Hydro. The proceeds of the sale will have to be carefully managed. The City Council has developed a strategy to ensure the best balance of immediate and long term benefits for its residents. This paper presents several mechanisms for accessing the funds and possible uses of the funds such as asset repair and rehabilitation, special projects, and growth driven projects. 6 tabs., 1 fig

  14. Long-term continuous administration of a hydro-ethanolic extract of ...

    African Journals Online (AJOL)

    Long-term continuous administration of a hydro-ethanolic extract of Synedrella ... Ghana, P.O Box LG 43, Legon, Accra, Ghana 2Department of Animal Experimentation, Noguchi Memorial. Institute for ..... short-or long-term administration.

  15. Introduction of remote meter reading for Hydro-Quebec's residential customers

    Energy Technology Data Exchange (ETDEWEB)

    Hache, R.; Pouliot, D.

    1992-01-01

    In 1986 Hydro-Quebec set a province-wide objective, under its program to improve the quality of customer service, to achieve 95% billing based on real readings. Using market studies, Hydro-Quebec was able to determine a population (approximately 10% of customers) of hard-to-access meters. To reach the objective, they examined the options of using additional human resources or using new technology. In 1988, they decided to adopt inbound technology (TELEREADER) and carry out a pilot project to validate certain aspects of the technology. This document gives an introduction to TELEREADER, along with its requirements, parameters and information on its installation.

  16. Linear Modeling and Regulation Quality Analysis for Hydro-Turbine Governing System with an Open Tailrace Channel

    Directory of Open Access Journals (Sweden)

    Jiandong Yang

    2015-10-01

    Full Text Available On the basis of the state–space method (SSM, a novel linear mathematical model of the unsteady flow for the tailrace system with an open channel is proposed. This novel model is an elastic linearized model of water hammer. The validity of the model has been verified by several examples of numerical simulation, which are based on a finite difference technique. Then, the complete mathematical model for the hydro-turbine governing system of hydropower station with an open tailrace channel, which is used for simulating the transient process of the hydro-turbine governing system under load disturbance, is established by combining the models of hydro-turbine, generator, governor and open tailrace channel. Finally, according to the complete model, the regulation quality for hydro-turbine governing system with an open tailrace channel under load disturbance is studied, and the effects of open tailrace channel and tailrace surge tank on regulation quality are analyzed. The results indicate that: The open tailrace channel has a strong influence on the regulation quality by observing the water level fluctuations in tailrace surge tank. The surge shows a piecewise periodical change along with the variation in the length of an open channel. The open tailrace channel can be used to improve the regulation quality of hydro-turbine governing system.

  17. HydroCloud: A Web Application for Exploring Stream Gage Data

    Directory of Open Access Journals (Sweden)

    Martin C. Roberge

    2017-08-01

    Full Text Available HydroCloud (hydrocloud.org is a mobile-friendly web application for visually browsing hydrology data from multiple sources. Data providers such as the US Geological Survey (USGS and the German 'Wasserstraßen- und Schifffahrtsverwaltung des Bundes' (WSV currently serve stream discharge data from more than 10,000 stream gages around the world. HydroCloud allows users to plot these data while out in the field, while also providing contextual information such as the current NEXRAD weather imagery or descriptive information about the stream gage and its watershed. Additional features include a chat mechanism for contacting developers, and the use of local storage for saving data.   Funding Statement: This project was supported in part by a grant from the Towson University School of Emerging Technology.

  18. Ontario Hydro's nuclear program

    International Nuclear Information System (INIS)

    Jackson, H.A.

    1982-06-01

    In 1981 Ontario Hydro generated over 100 billion KWh of electrical energy. Approximately one third of this was from nuclear units. There are ten CANDU units (5 250 MW) currently in operation, and another twelve (8 600 MW) are under construction. The presently committed nuclear expansion program is estimated to involve expenditures of 16 billion dollars over the next 10 years. About 10 000 people are employed in the nuclear design and construction program. All projects are generally on schedule, with the stations coming into service during the following time periods: Pickering B, 1983-85; Bruce B, 1984-87; Darlington, 1988-90. The status of each project is reviewed. Planning is underway for some retubing projects, as early as 1985 for Pickering A

  19. ASSESSMENT OF WATER PUMPING SYSTEM AND IMPROVEMENT IN HYDRO-ENERGETIC PERFORMANCE

    Directory of Open Access Journals (Sweden)

    Augusto da Gama Rego

    2017-01-01

    Full Text Available Within the policy of sanitation services for all and the need t o lower electricity consumption, the current analysis evaluates the water pumping s ystem and defines actions for the improvement of hydro-energetic performance. The present research was divided into two sections: assessment of the water pumping syst em (based on hydro- energetic simulation and an analysis of the impact of ineffici ency on electric energy consumption (based on computer simulation. Results revealed th at methodology was satisfactory and that the main operational issues could be iden tified and corrections could be computer-simulated. A potential 16% reduction in consu mption and in electricity costs could be obtained.

  20. 78 FR 62350 - Lock+ Hydro Friends Fund III, LLC; Western Minnesota Municipal Power Agency; Notice Announcing...

    Science.gov (United States)

    2013-10-18

    .... 14540-000] Lock+ Hydro Friends Fund III, LLC; Western Minnesota Municipal Power Agency; Notice...+ Hydro Friends Fund III, LLC for Project No. 14539-000 and Western Minnesota Municipal Power Agency for... CFR 385.2001(a)(2) (2013). On October 21, 2013, at 10:00 a.m. (Eastern Time), the Secretary of the...

  1. 78 FR 70549 - Lock+ Hydro Friends Fund III, LLC, Western Minnesota Municipal Power Agency; Notice Announcing...

    Science.gov (United States)

    2013-11-26

    .... 14540-000] Lock+ Hydro Friends Fund III, LLC, Western Minnesota Municipal Power Agency; Notice...+ Hydro Friends Fund III, LLC for Project No. 14539-000 and Western Minnesota Municipal Power Agency for... CFR.385.2001(a)(2) (2013). On November 25, 2013, at 10:00 a.m. (Eastern Time), the Secretary of the...

  2. Report and recommendations in the matter of British Columbia Hydro and Power Authority and an inquiry into a Heritage Contract for British Columbia Hydro and Power Authority's existing generation resources and regarding stepped rates and transmission access

    International Nuclear Information System (INIS)

    Hobbs, R.H.; Hall, K.L.; Bradley, P.G.

    2003-01-01

    Under British Columbia's new energy plan, the BC Utilities Commission made recommendations on two main policy initiatives regarding regulation of BC Hydro. The first involved a Heritage Contract that would ensure any benefits attributable to the existing low-cost generation of BC Hydro would be secured for British Columbians. The Heritage Contract had the support of all participants. The proposal was based on the revenue required by Generation to meet the cost of supplying the energy of Heritage Resources to Distribution. The second recommendation involved a stepped rate structure for large commercial and industrial customers to encourage a more efficient use of energy resources and private investments in new generation. It also recommends concurrent implementation of time-of-use rates. BC Hydro had also proposed a significant change in the determination and disposition of Trade Income between BC Hydro and Powerex. The agreement stipulated that Trade Income would no longer include revenues from the sale of surplus power, except for profits realized by Powerex after paying BC Hydro an indexed price for surplus power. All Trade income up to $200 million would accrue to the ratepayers. This report presents 3 alternatives to the Trade Income proposal and several others recommendations dealing with transmission voltage customers and generation access, legislation, regulation and special directions. The report identified a schedule for implementation of retail access by the end of 2004. 9 appendices

  3. Geographic information systems - tool for evaluation of the hydro-energy performance of water supply systems

    Directory of Open Access Journals (Sweden)

    Aline Christian Pimentel Almeida Santos

    2017-05-01

    Full Text Available The most relevant challenges in the water supply system (WSS are high water losses and the waste of electric energy. This paper aimed to assess the capacity of the Geographic Information System (GIS in the analysis of the hydro-energy performance of WSSs. The Stage 1 comprises the selection of data and the respective hydro-energy indexes are defined; cartographic data are defined in Stage 2 and a geo-referenced database is constructed in Stage 3. In the stage 4, the data of the Central Water Supply Zone administered by the Water Works Company of the state of Pará in Belém, Brazil were employed to assess its applicability, in which the sectors with the worst hydro-energy performance were identified, such as Sector 9, with the highest water loss rates (59.11% and electric energy consumption per m3 of water produced (1.57 kwh m-³. The results shows that geo-referential assessment of the hydro-energy performance of WSSs provided accurate information for decision-taking related to the rational use of water and electricity in the systems.

  4. 78 FR 49509 - Lock+ Hydro Friends Fund XXX, LLC; FFP Project 121, LLC; Notice Announcing Preliminary Permit...

    Science.gov (United States)

    2013-08-14

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [ Project No. 13625-003; Project No. 14504-000] Lock+ Hydro Friends Fund XXX, LLC; FFP Project 121, LLC; Notice Announcing Preliminary Permit... and Jefferson County, Ohio. The applications were filed by Lock+ Hydro Friends Fund XXX, LLC for...

  5. 76 FR 73616 - Lock 12 Hydro Partners; FFP Project 107 LLC; Notice of Competing Preliminary Permit Applications...

    Science.gov (United States)

    2011-11-29

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project Nos. 13214-002; 14274-000] Lock 12 Hydro Partners; FFP Project 107 LLC; Notice of Competing Preliminary Permit Applications Accepted..., 2011, Lock 12 Hydro Partners (Lock 12), and FFP Project 107 LLC (FFP 107) filed preliminary permit...

  6. 76 FR 73614 - Lock 14 Hydro Partners; FFP Project 106 LLC; Notice of Competing Preliminary Permit Applications...

    Science.gov (United States)

    2011-11-29

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project Nos. 13213-002; 14271-000] Lock 14 Hydro Partners; FFP Project 106 LLC; Notice of Competing Preliminary Permit Applications Accepted..., 2011, Lock 14 Hydro Partners (Lock 14), and FFP Project 106 LLC (FFP 106) filed preliminary permit...

  7. Chemical influence on the hydro-mechanical behaviour of high-density bentonite

    Energy Technology Data Exchange (ETDEWEB)

    Castellanos, E.; Romero, E.; Lioret, A. [Technical Univ. of Catalonia UPC, Barcelona (Spain); Musso, G. [Politecnico di Torino, Torino (Italy)

    2005-07-01

    In radioactive waste disposal schemes, during the operational period of clay barriers, solute transport an d thermal gradients may alter the solute concentration of pore water. These induced changes have important consequences on hydro-mechanical properties and microstructural alterations (mineral composition and pore size distribution changes) of the clay barrier. Chemically induced changes originated by different imbibition fluids and soil mineral compositions have been a subject with a long research tradition. These researches have been mainly focused on the behaviour of reconstituted soils starting from slurry and saturated wit h saline solutions at elevated concentrations, where hydro-mechanical changes (soil compressibility and water permeability changes) are clearly detected. In contrast, available information concerning the response of high-density clays subjected to chemically induced actions with a wide range of pore solution concentrations is very limited in spite of its practical relevance to environmental geotechnics. This situation has been caused, at least in part, by the difficulties in detecting important hydro-mechanical changes when clays with low water storage capacity have been used. Nevertheless, this paper will demonstrate that even in the case of high-density fabrics, considerable changes can be observed when high-activity clays (bentonites) are imbibed with different pore fluid compositions. (authors)

  8. On the hydro-mechanical behaviour of MX80 bentonite-based materials

    Directory of Open Access Journals (Sweden)

    Yu-Jun Cui

    2017-06-01

    Full Text Available Bentonite-based materials have been considered in many countries as engineered barrier/backfilling materials in deep geological disposal of high-level radioactive waste. During the long period of waste storage, these materials will play an essential role in ensuring the integrity of the storage system that consists of the waste canisters, the engineered barrier/backfill, the retaining structures as well as the geological barrier. Thus, it is essential to well understand the hydro-mechanical behaviours of these bentonite-based materials. This review paper presents the recent advances of knowledge on MX80 bentonite-based materials, in terms of water retention properties, hydraulic behaviour and mechanical behaviour. Emphasis is put on the effect of technological voids and the role of the dry density of bentonite. The swelling anisotropy is also discussed based on the results from swelling tests with measurements of both axial and radial swelling pressures on a sand-bentonite mixture compacted at different densities. Microstructure observation was used to help the interpretation of macroscopic hydro-mechanical behaviour. Also, the evolution of soil microstructure thus the soil density over time is discussed based on the results from mock-up tests. This evolution is essential for understanding the long-term hydro-mechanical behaviour of the engineered barrier/backfill.

  9. Ultrafast Hydro-Micromechanical Synthesis of Calcium Zincate: Structural and Morphological Characterizations

    Directory of Open Access Journals (Sweden)

    Vincent Caldeira

    2017-01-01

    Full Text Available Calcium zincate is a compound with a large panel of application: mainly known as an advantageous replacement of zinc oxide in negative electrodes for air-zinc or nickel-zinc batteries, it is also used as precursor catalyst in biodiesel synthesis and as antifungal compound for the protection of limestone monuments. However, its synthesis is not optimized yet. In this study, it was elaborated using an ultrafast synthesis protocol: Hydro-Micromechanical Synthesis. Two other synthesis methods, Hydrochemical Synthesis and Hydrothermal Synthesis, were used for comparison. In all cases, the as-synthesized samples were analyzed by X-ray diffraction, scanning electron microscopy, and LASER diffraction particle size analysis. Rietveld method was used to refine various structural parameters and obtain an average crystallite size, on a Hydro-Micromechanical submicronic sample. X-ray single crystal structure determination was performed on a crystal obtained by Hydrochemical Synthesis. It has been shown that regardless of the synthesis protocol, the prepared samples always crystallize in the same crystal lattice, with P21/c space group and only differ from their macroscopic textural parameters. Nevertheless, only the Hydro-Micromechanical method is industrially scalable and enables a precise control of the textural parameters of the obtained calcium zincate.

  10. Anticonvulsant and neuroprotective effects of Rosa damascena hydro-alcoholic extract on rat hippocampus

    Directory of Open Access Journals (Sweden)

    Mansour Homayoun

    2015-04-01

    Full Text Available Objective: Previously, analgesic, hypnotic, and anticonvulsant effects have been suggested for Rosa damascena (R. damascena. In the present study, possible anti-seizure and neuro-protective effects of hydro-alcoholic extract of R. damascena has been investigated after inducing seizures in rats by pentylenetetrazole (PTZ. Materials and Methods: The rats were divided to five groups: (1 Control: received saline, (2 PTZ: 100 mg/kg, i.p., (3 PTZ-Extract 50 mg/kg(PTZ-Ext 50, (4 PTZ- Extract 100 mg/kg(PTZ-Ext 100, and (5 PTZ- Extract 200 mg/kg(PTZ-Ext 200 groups which were treated with 50, 100, and 200 mg/kg respectively of hydro-alcoholic extract of R. damascena for one week before PTZ injection. The animals were examined for electrocorticography (ECoG recording and finally, the brains were removed for histological study. Results: The hydro-alcoholic extract of R. damascena significantly prolonged the latency of seizure attacks and reduced the frequency and amplitude of epileptiform burst discharges induced by PTZ injection. Moreover, all three doses of the extract significantly inhibited production of dark neurons in different regions of the hippocampus in the mentioned animal model. Conclusion: The present study showed that the hydro-alcoholic extract of R. damascena has anticonvulsant and neuroprotective effects. More investigations are needed to be done in order to better understand the responsible compound(s as well as the possible mechanism(s.

  11. The Atlin Hydro Project : generation for generations

    Energy Technology Data Exchange (ETDEWEB)

    Simpson, S. [Atlin Tlingit Development Corp., Atlin, BC (Canada)

    2010-07-01

    This presentation documented the step-by-step process by which the Atlin Hydro Project was developed. The Taku River Tlingit First Nation undertook the Atlin project as part of its vision for responsible resource management, sustainable economic development, and cultural revival. The Atlin Community Energy Plan involved an assessment of electricity demand, a 20-year demand projection, energy efficiency recommendations, and an assessment of power supply options such as wind towers, connection to the Yukon power grid, and hydro. The potential impact on fisheries, hydrology, wildlife habitat, roads and bridges, navigable waters and forests, existing rights, and First Nation archaeology were assessed, along with other factors such as hazards and flood control. A hydrology assessment of the Surprise-Pine Drainage Basin was undertaken, and stream-flow measurements were taken near the intake location on Pine Creek. The project comprises a discharge control structure and a fish ladder; an intake and weir on Pine Creek; a penstock pipeline from intake to powerhouse; a powerhouse with a 2.1 MW Pelton turbine generator and a switch yard; and a power line from the powerhouse to the interconnection with the existing grid. The impacts on fisheries, wildlife, and human movement are expected to be minimal. 28 figs., 3 tabs.

  12. Atmospheric emissions : hydro-electricity versus other options

    International Nuclear Information System (INIS)

    Chamberland, A.; Belanger, C.; Gagnon, L.

    1996-01-01

    One of the great environmental advantage offered by hydro-electricity in northern or temperate climates includes reduced atmospheric emissions. While natural gas plants, from an environmental viewpoint, are thought to be the best fossil fuel option, they emit 18 times more greenhouse gases, at least 60 times more sulfur dioxide and hundreds of times more nitrogen oxides than do hydro-electric systems. The relative SO 2 and greenhouse gas emissions from energy systems in Canada were outlined, and their environmental impacts were described. At the same time, mention was made of other environmental pollutants, such as acid rain, photochemical smog, and particulates that continue to have major impacts on the environment, but were displaced as the focus of attention by greenhouse gases. A study was conducted to determine the effects of extreme biomass decomposition and greenhouse gas emissions from reservoirs. The study showed that at depths of more than 10 centimeters below water surface, organic matter does not contribute to greenhouse gas production, even at 20 degrees C. It was demonstrated that even when maximum biomass decomposition is assumed, a modern natural gas plant would emit 14 times more green house gases than a hydroelectric plant of comparable capacity. 13 refs., 4 tabs., 3 figs

  13. Hydro turbine governor’s power control of hydroelectric unit with sloping ceiling tailrace tunnel

    Science.gov (United States)

    Fu, Liang; Wu, Changli; Tang, Weiping

    2018-02-01

    The primary frequency regulation and load regulation transient process when the hydro turbine governor is under the power mode of hydropower unit with sloping ceiling tailrace are analysed by field test and numerical simulation in this paper. A simulation method based on “three-zone model” to simulate small fluctuation transient process of the sloping ceiling tailrace is proposed. The simulation model of hydraulic turbine governor power mode is established by governor’s PLC program identification and parameter measurement, and the simulation model is verified by the test. The slow-fast-slow “three-stage regulation” method which can improve the dynamic quality of hydro turbine governor power mode is proposed. The power regulation strategy and parameters are optimized by numerical simulation, the performance of primary frequency regulation and load regulation transient process when the hydro turbine governor is under power mode are improved significantly.

  14. Nuclear power at Ontario Hydro

    International Nuclear Information System (INIS)

    Tapon, F.; Osborne, T.J.

    1980-01-01

    This case study shows that the diffusion of nuclear power in the electric public utility industry in Canada approximates the logistic growth curve, in agreement with previous results on technological innovation diffusion in the U.S. private sector. Many of the economic variables that affect this diffusion in the private sectors in the U.S. and Canada are also significant in the public sector in Canada. Too few utilities have adopted nuclear technology to permit using regression analysis to study the effect of environmental and regulatory factors on the growth of Ontario Hydro. Thus, cost-benefit analysis for each province might be more effective

  15. BC Hydro experiences the power of engineering document management software

    International Nuclear Information System (INIS)

    Wilkins, A.

    2000-01-01

    The recent popularity of electronic document management software (EDMS), specifically designed for engineering CAD/CAM drawings that holds the promise of reducing paper-pushing and freeing up organizational resources for more productive purposes, is discussed. To illustrate how such systems function, a document management system installed at BC Hydro, with over 2,500 users in two main engineering groups is described. The new system - FileNET - replaces several older systems that have been used as stand-alone systems in various divisions of BC Hydro for some time. Instead of integrating the entire file of some 750,000 documents, the new system has complete records of some 70,000 of the most recent CAD drawings and an on-line index to the older file that is used less frequently. Access to the entire storehouse of drawings is said to be fast, efficient and secure. Automated document control procedures during work-in-progress, viewing, redlining capabilities, seamless integration with CAD tools and Web access to drawings from anywhere within the two engineering divisions, are some of the most noteworthy characteristics of the new system. It does not completely replace paper, but it does promise significant streamlining of the paper handling function. It also ensures that BC Hydro's central computer is the prime repository of all documents and drawings, and that this valuable record of environmental. legal, regulatory and other public policy importance is instantly available, without the need to handle paper

  16. Assessing the role of large hydro in Canada's electricity future

    International Nuclear Information System (INIS)

    Lee Pochih

    1992-01-01

    Electric power in Canada was first generated by steam in the 1880s. The use of hydroelectricity spread rapidly due to abundant water resources and the nationalization of power companies by the provinces; by 1920, 97% of Canadian electricity production came from hydroelectric plants. Thermal generation became competitive by the 1960s, when most of the best hydro sites had been developed, and nuclear generation also started gaining a share of the market. By 1991, hydroelectricity's share of Canadian power production had declined to around 60%. Hydroelectric power has long been used as an instrument of Canadian industrial policy. Given the amount and importance of utility capital expenditures, it was recognized that hydropower development could serve such policy objectives as job creation, industrial development, and macroeconomic stabilization. Creation of provincially owned utilities led to construction of large hydroelectric projects, notably in Quebec, British Columbia, Manitoba, and Newfoundland. The 20 largest hydroelectric power plants in Canada have a total installed capacity of 35,704 MW, representing ca 59% of Canada's total 1991 hydro capacity. The construction of such large projects is not expected to proceed as quickly as in the past because of environmental concerns. However, a number of factors favor continuation of development of hydro resources: a remaining potential estimated at ca 44,000 MW; simplification of electricity export regulations; more stringent air pollution standards that favor non-polluting energy sources; and a moratorium on nuclear power plants in Ontario. 4 tabs

  17. Note sur l'environnement hydro-sédimentaire lagunaire Marcory ...

    African Journals Online (AJOL)

    Note sur l'environnement hydro-sédimentaire lagunaire Marcory-Riviera en lagune Ebrié en Côte d'Ivoire : Note on hydrology and sedimentary characteristics of the Marcory-Riviera lagoon area in Abidjan, Côte d'Ivoire.

  18. A tale of three hydros - post-privatisation in Patagonia

    International Nuclear Information System (INIS)

    Smith, H.F.

    1994-01-01

    When Argentina's state-owned utility, operating in northern Patagonia, sold off hydro-electric generating plants in 1993, they were bought by several North American utility companies. This article looks at the problems these companies encountered and examines whether the enterprise has shown itself to be economically valuable. (UK)

  19. A Novel Frequency Restoring Strategy of Hydro-PV Hybrid Microgrid

    DEFF Research Database (Denmark)

    Wei, Feng; Kai, Sun; Guan, Yajuan

    2014-01-01

    . The existence of frequency steady-state error and the slow active power/frequency dynamic response are inevitable. Therefore, a novel frequency restoring strategy for the hydro-PV hybrid microgrid based on the improved hierarchical control of PV systems is proposed in this paper. The output active power of PV......The conventional PV systems based on the voltage inverters only inject dispatched power to the utility grid when they work at a grid-connected mode in the hydro-PV hybrid microgrid. Due to the droop method employed for load sharing between generators, as well as the enormous inertia of system...... systems is controlled by an extra frequency restoring controller resided in the tertiary control level. The frequency steady-state error is eliminated through regulating and rebalancing the power flow between the hydropower and the PV system. The proposed strategy has verified through simulations...

  20. T-staging of gastric cancer of air-filling multidetector-row CT: Comparison with hydro-multidetector-row CT

    Energy Technology Data Exchange (ETDEWEB)

    Kumano, Seishi, E-mail: kumano@radiol.med.kindai.ac.jp [Department of Radiology, Kinki University School of Medicine, Osakasayama, Osaka 589-8511 (Japan); Okada, Masahiro; Shimono, Taro; Kuwabara, Masatomo; Yagyu, Yukinobu; Imaoka, Izumi; Ashikaga, Ryuichiro; Ishii, Kazunari; Murakami, Takamichi [Department of Radiology, Kinki University School of Medicine, Osakasayama, Osaka 589-8511 (Japan)

    2012-11-15

    Purpose: The purpose of this study was to evaluate the accuracy of T-staging of gastric cancer by air-filling multidetector-row CT (air-MDCT) compared with water-filling MDCT (hydro-MDCT). Materials and methods: One hundred fifteen patients with histologically diagnosed gastric cancer were included in this study. Fifty-eight patients underwent air-MDCT, and the remaining 57 had hydro-MDCT using a 64-channel scanner. Based on the volumetric data of contrast-enhanced MDCT obtained about 75 s after intravenously injecting 525 mg iodine per kilogram patients weight (525 mgI/kg) nonionic contrast material at the rate of 2 ml/s, oblique coronal and oblique sagittal multi-planar reformatted images perpendicular to the stomach wall, including the tumor, were reconstructed on a workstation. Mural invasion of gastric cancer into the gastric wall, as visualized by CT, was classified according to the TNM classification, and the results of T-staging by MDCT were compared with those by pathologic analysis after surgery. Results: Correct assessment of T-staging by air-CT was achieved in 48 of 58 patients (83%), and that by hydro-MDCT was 49 of 57 patients (86%). The sensitivity, specificity, and accuracy of the technique in determining the invasion of serosa were 88%, 93%, and 91% for air-CT and 83%, 95%, and 91% for hydro-CT. There were no significant differences between hydro-MDCT and air-MDCT in sensitivity (P = 0.73), specificity (P = 0.71) and accuracy (P = 0.98). Conclusion: Air-MDCT is a very valuable tool in T-staging of gastric cancer as well as hydro-MDCT.

  1. Hydro-electric power - potential and limitations

    Energy Technology Data Exchange (ETDEWEB)

    Amundsen, T.

    1995-12-31

    This paper focuses on efficiency improvement in electric power production by matching the different characteristics for thermal power and hydropower. The paper introduces secondary hydropower defined as available power stored as hydro-energy in water reservoirs as a key element to achieve this goal. The iron-locked connection between GDP (Gross Domestic Product) and power consumption is discussed. As it also is a general understanding that GDP has to increase to accommodate the world`s growing population, the unavoidable conclusion is that more power is to be produced. 3 figs.

  2. Hydro-electric power - potential and limitations

    International Nuclear Information System (INIS)

    Amundsen, T.

    1995-01-01

    This paper focuses on efficiency improvement in electric power production by matching the different characteristics for thermal power and hydropower. The paper introduces secondary hydropower defined as available power stored as hydro-energy in water reservoirs as a key element to achieve this goal. The iron-locked connection between GDP (Gross Domestic Product) and power consumption is discussed. As it also is a general understanding that GDP has to increase to accommodate the world's growing population, the unavoidable conclusion is that more power is to be produced. 3 figs

  3. Hydro-Quebec : positioning and strategic planning

    International Nuclear Information System (INIS)

    Lanoue, R.

    1998-01-01

    Hydro-Quebec's corporate concerns for 1998-2002 were highlighted. The Corporation's strategic plan envisages that within the next decade, the utility will boost sales by 25 per cent with an investment of $13.2 billion in new generation projects. The electric utility plans to build on past experience and maintain its electricity rates and service quality. Sustaining environmental quality while developing into a world class enterprise remains a major objective of the utility. Research and development will also continue to be an integral part of the utility's operations. Tabs., figs

  4. CalSimHydro Tool - A Web-based interactive tool for the CalSim 3.0 Hydrology Prepropessor

    Science.gov (United States)

    Li, P.; Stough, T.; Vu, Q.; Granger, S. L.; Jones, D. J.; Ferreira, I.; Chen, Z.

    2011-12-01

    CalSimHydro, the CalSim 3.0 Hydrology Preprocessor, is an application designed to automate the various steps in the computation of hydrologic inputs for CalSim 3.0, a water resources planning model developed jointly by California State Department of Water Resources and United States Bureau of Reclamation, Mid-Pacific Region. CalSimHydro consists of a five-step FORTRAN based program that runs the individual models in succession passing information from one model to the next and aggregating data as required by each model. The final product of CalSimHydro is an updated CalSim 3.0 state variable (SV) DSS input file. CalSimHydro consists of (1) a Rainfall-Runoff Model to compute monthly infiltration, (2) a Soil moisture and demand calculator (IDC) that estimates surface runoff, deep percolation, and water demands for natural vegetation cover and various crops other than rice, (3) a Rice Water Use Model to compute the water demands, deep percolation, irrigation return flow, and runoff from precipitation for the rice fields, (4) a Refuge Water Use Model that simulates the ponding operations for managed wetlands, and (5) a Data Aggregation and Transfer Module to aggregate the outputs from the above modules and transfer them to the CalSim SV input file. In this presentation, we describe a web-based user interface for CalSimHydro using Google Earth Plug-In. The CalSimHydro tool allows users to - interact with geo-referenced layers of the Water Budget Areas (WBA) and Demand Units (DU) displayed over the Sacramento Valley, - view the input parameters of the hydrology preprocessor for a selected WBA or DU in a time series plot or a tabular form, - edit the values of the input parameters in the table or by downloading a spreadsheet of the selected parameter in a selected time range, - run the CalSimHydro modules in the backend server and notify the user when the job is done, - visualize the model output and compare it with a base run result, - download the output SV file to be

  5. 77 FR 31843 - Swan Lake North Hydro, LLC; Notice of Preliminary Permit Application Accepted For Filing and...

    Science.gov (United States)

    2012-05-30

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project No. 13318-002] Swan Lake North Hydro, LLC; Notice of Preliminary Permit Application Accepted For Filing and Soliciting Comments, Motions to Intervene, and Competing Applications On April 3, 2012, Swan Lake North Hydro, LLC, filed an application for a successive preliminary permit...

  6. 75 FR 66083 - Iron Mask Hydro, LLC; Notice of Preliminary Permit Application Accepted for Filing and Soliciting...

    Science.gov (United States)

    2010-10-27

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project No. 13723-000] Iron Mask Hydro..., Iron Mask Hydro, LLC filed an application for a preliminary permit, pursuant to section 4(f) of the Federal Power Act (FPA), proposing to study the feasibility of the Iron Mask Pumped Storage Project to be...

  7. 75 FR 53963 - Iron Mask Hydro, LLC; Notice of Preliminary Permit Application Accepted for Filing and Soliciting...

    Science.gov (United States)

    2010-09-02

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project No. 13723-000] Iron Mask Hydro... Intervene, and Competing Applications August 27, 2010. On May 6, 2010, Iron Mask Hydro, LLC filed an... study the feasibility of the Iron Mask Pumped Storage Project to be located near the U.S. Bureau of...

  8. Invitations to tenders from Hydro-Quebec: many projects, little MW?

    International Nuclear Information System (INIS)

    Turmel, A.

    2004-01-01

    Topics discussed include the regulatory and jurisdictional framework governing the tendering process, and the difficulties involved in filing applications. The roles of Hydro-Quebec, the Quebec government, and the Quebec government's economic regulation agency, Regie de l'energie were covered

  9. Comparison between MPC and PID control for compact hydro ...

    African Journals Online (AJOL)

    This paper presents water temperature of a hydro distillation that have been modelled by using linear ARX Modal. Based on the modal obtained, a model predictive controller and PID controller have been developed. Both controller undergone the performance of controller tests that includes set point, set point change and ...

  10. Code Assessment of SPACE 2.19 using LSTF 10% Main Steam-Line-Break Test

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Minhee; Kim, Seyun [KHNP CRI, Daejeon (Korea, Republic of)

    2016-10-15

    The Safety and Performance Analysis Code for Nuclear Power Plants (SPACE) has been developed in recent years by the Korea Hydro and Nuclear Power Co. through collaborative works with other Korean nuclear industries and research institutes. As a result of the development, the 2.19 version of the code was released through the successive various verification and validation works. In this study, results produced by the SPACE 2.19 code were compared with the experimental data from JAERI's LSTF Test Run SBSL- 01 for a 10% main steam line break transient in a pressurized water reactor. The LSTF 10% main steam line break test were simulated using the SPACE 2.19 for code V and V work. The overall comparisons between the SPACE 2.19 code prediction and the LSTF Test Run SB-SL-01 experimental data are reasonably satisfactory. The comparisons were conducted in terms of the variations of mass flow rate, void fraction, pressure, collapsed liquid level, temperature, and system flow rate for the transient. In addition, the input model was modified for simulation accuracy of PZR pressure based on the calculated results. The correction of PORV setpoint affects to simulate the PORV open and close phenomena similarly with experiments. From the modification, the computed results show a reasonable agreement with experimental data in overall transient time.

  11. Twenty-five years of research in hydro-ecology at the EDF research and development division

    International Nuclear Information System (INIS)

    Gosse, Ph.

    1999-01-01

    Hydro-ecology (or aquatic ecology) is the study of aquatic systems in their interacting aspects: physical, chemical and biological. The creation in 1974 of the Environment Department at EDF Research and Development Division marked the start in France of quantitative hydro-ecology applied to power generation installations. The studies developed around several main themes, determined both the expansion of the nuclear programme and by changes in French environmental regulations, in particular the 1976 law on impact studies, the 1984 fishing and hydro-biology law and the 1992 water law. In this framework, he effect of artificial warming of rivers, eutrophication of continental and marine waters, transfers of mineral micro-pollutants and radionuclides in rivers, and problems specific to hydropower installations such as guaranteed in stream flow or fish pass design, have been studies. This work, conducted in collaboration with many other laboratories, has led to the development of original quantitative approaches, notably in the field of numerical modelling. The paper selects several of the tools developed whose scope of application is wider than the environment and management of thermal or hydropower plants. Two major applications grouping the experience acquired in hydro-ecology are presented: the AGIRE software and the global environment study of the Singrauli area in India. (author)

  12. Impact of the future water value on wind-reversible hydro offering strategies in electricity markets

    International Nuclear Information System (INIS)

    Sánchez de la Nieta, A.A.; Contreras, J.; Catalão, J.P.S.

    2015-01-01

    Highlights: • A stochastic mixed integer linear model is proposed to maximize the profit and the future water value. • Conditional Value at Risk (CVaR) is used for risk-hedging. • The offer strategies analyzed are single and separate, with and without a physical connection. • The effect of considering the future water value of the reservoirs is studied for several time horizons. - Abstract: A coordinated offering strategy between a wind farm and a reversible hydro plant can reduce wind power imbalances, improving the system efficiency whilst decreasing the total imbalances. A stochastic mixed integer linear model is proposed to maximize the profit and the future water value FWV of the system using Conditional Value at Risk (CVaR) for risk-hedging. The offer strategies analyzed are: (i) single wind-reversible hydro offer with a physical connection between wind and hydro units to store spare wind energy, and (ii) separate wind and reversible hydro offers without a physical connection between them. The effect of considering the FWV of the reservoirs is studied for several time horizons: one week (168 h) and one month (720 h) using an illustrative case study. Conclusions are duly drawn from the case study to show the impact of FWV in the results.

  13. OECD/NEZ Main Steam Line Break Benchmark Problem Exercise I Simulation Using the SPACE Code with the Point Kinetics Model

    International Nuclear Information System (INIS)

    Kim, Yohan; Kim, Seyun; Ha, Sangjun

    2014-01-01

    The Safety and Performance Analysis Code for Nuclear Power Plants (SPACE) has been developed in recent years by the Korea Nuclear Hydro and Nuclear Power Co. (KHNP) through collaborative works with other Korean nuclear industries. The SPACE is a best-estimated two-phase three-field thermal-hydraulic analysis code to analyze the safety and performance of pressurized water reactors (PWRs). The SPACE code has sufficient features to replace outdated vendor supplied codes and to be used for the safety analysis of operating PWRs and the design of advanced reactors. As a result of the second phase of the development, the 2.14 version of the code was released through the successive various V and V works. The topical reports on the code and related safety analysis methodologies have been prepared for license works. In this study, the OECD/NEA Main Steam Line Break (MSLB) Benchmark Problem Exercise I was simulated as a V and V work. The results were compared with those of the participants in the benchmark project. The OECD/NEA MSLB Benchmark Problem Exercise I was simulated using the SPACE code. The results were compared with those of the participants in the benchmark project. Through the simulation, it was concluded that the SPACE code can effectively simulate PWR MSLB accidents

  14. Impact of climate change on operations and planning of Hydro-Quebec's generation system

    International Nuclear Information System (INIS)

    Raymond, M.P.; Houle, B.; Robert, S.

    2008-01-01

    Studies that are underway at OURANOS indicate that some of the probable climate change scenarios in the coming years will have an effect on Quebec's watersheds hydrology and on temperatures. For Hydro-Quebec, who draws more than 95% of its generation from hydraulic resources and whose electricity loads depend pretty much on temperatures, such climate changes will definitely have a significant impact on many aspects of the planning and operations of its system. Our presentation will be divided into three parts. First, to bridge the gap between climate change scientists and water managers, we will present a list of the types of parameters needed from the scientists in order for the water managers to assess the impacts of climate changes on a hydroelectric system such as Hydro-Quebec's. These parameters will include changes in annual and seasonal distribution and variability of natural inflows and, most importantly, the timing of the changes in the coming years. The second part will focus on the types of adaptive decisions and strategies that will have to be taken ahead of time in order to implement the changes on a hydroelectric generation system such as Hydro-Quebec's. They will cover different areas such as generation planning, operations planning and optimization, refurbishment and replacement of infrastructures, dam safety, flood control and protection, maintenance planning and reliability. Finally, we will present more specific results of the impact of some climate change scenarios on Hydro-Quebec's overall generation system, showing differences between regions, and a case study on one of its river systems. (author)

  15. HydroCube: an entity-relationship hydrogeological data model

    Science.gov (United States)

    Wojda, Piotr; Brouyère, Serge; Derouane, Johan; Dassargues, Alain

    2010-12-01

    Managing, handling and accessing hydrogeological information depends heavily on the applied hydrogeological data models, which differ between institutions and countries. The effective dissemination of hydrogeological information requires the convergence of such models to make hydrogeological information accessible to multiple users such as universities, water suppliers, and administration and research organisations. Furthermore, because hydrogeological studies are complex, they require a wide variety of high-quality hydrogeological data with appropriate metadata in clearly designed and coherent structures. A need exists, therefore, to develop and implement hydrogeological data models that cover, as much as possible, the full hydrogeological domain. A new data model, called HydroCube, was developed for the Walloon Region in Belgium in 2005. The HydroCube model presents an innovative holistic project-based approach which covers a full set of hydrogeological concepts and features, allowing for effective hydrogeological project management. The model stores data relating to the project locality, hydrogeological equipment, and related observations and measurements. In particular, it focuses on specialized hydrogeological field experiments such as pumping and tracer tests. This logical data model uses entity-relationship diagrams and it has been implemented in the Microsoft Access environment. It has been enriched with a fully functional user interface.

  16. Managing a hydro-energy reservoir: A policy approach

    Energy Technology Data Exchange (ETDEWEB)

    Van Ackere, Ann [HEC Lausanne, Internef, Universite de Lausanne, CH 1015 Lausanne, Dorigny (Switzerland); Ochoa, Patricia [London Business School, Regent' s Park, London NW1 4SA (United Kingdom)

    2010-11-15

    Liberalisation and privatisation have increased the need to gain more understanding into the management of hydro storage (HS) plants. We analyse what types of reservoir management policies enable an owner or a public authority to achieve their respective objectives. By 'policy' we understand simple, easily applicable decision rules, which enable a decision maker to decide when and how much to produce based on currently available information. We use a stylised deterministic simulation model of a hydro-power producer (HP) who behaves strategically. We study a non-liberalised market, where the authorities aim to minimise the total electricity cost for customers and a liberalised market where the HP attempts to maximise his contribution. This enables us to evaluate the impact of the liberalisation of HS production decisions on production volumes and electricity prices. We conclude that imposing rigid policies with the aim of limiting the potential for strategic behaviour can create incentives to produce only at very high prices throughout the year. This can lead to very high total costs, especially when the producer has most flexibility (large reservoirs combined with large turbine capacity). More surprisingly, we observe lower total production in a non-liberalised market. (author)

  17. Managing a hydro-energy reservoir: A policy approach

    Energy Technology Data Exchange (ETDEWEB)

    Ackere, Ann van, E-mail: Ann.vanAckere@unil.c [HEC Lausanne, Internef, Universite de Lausanne, CH 1015 Lausanne, Dorigny (Switzerland); Ochoa, Patricia, E-mail: Patricia.Ochoa@edfenergy.co [London Business School, Regent' s Park, London NW1 4SA (United Kingdom)

    2010-11-15

    Liberalisation and privatisation have increased the need to gain more understanding into the management of hydro storage (HS) plants. We analyse what types of reservoir management policies enable an owner or a public authority to achieve their respective objectives. By 'policy' we understand simple, easily applicable decision rules, which enable a decision maker to decide when and how much to produce based on currently available information. We use a stylised deterministic simulation model of a hydro-power producer (HP) who behaves strategically. We study a non-liberalised market, where the authorities aim to minimise the total electricity cost for customers and a liberalised market where the HP attempts to maximise his contribution. This enables us to evaluate the impact of the liberalisation of HS production decisions on production volumes and electricity prices. We conclude that imposing rigid policies with the aim of limiting the potential for strategic behaviour can create incentives to produce only at very high prices throughout the year. This can lead to very high total costs, especially when the producer has most flexibility (large reservoirs combined with large turbine capacity). More surprisingly, we observe lower total production in a non-liberalised market.

  18. Managing a hydro-energy reservoir: A policy approach

    International Nuclear Information System (INIS)

    Van Ackere, Ann; Ochoa, Patricia

    2010-01-01

    Liberalisation and privatisation have increased the need to gain more understanding into the management of hydro storage (HS) plants. We analyse what types of reservoir management policies enable an owner or a public authority to achieve their respective objectives. By 'policy' we understand simple, easily applicable decision rules, which enable a decision maker to decide when and how much to produce based on currently available information. We use a stylised deterministic simulation model of a hydro-power producer (HP) who behaves strategically. We study a non-liberalised market, where the authorities aim to minimise the total electricity cost for customers and a liberalised market where the HP attempts to maximise his contribution. This enables us to evaluate the impact of the liberalisation of HS production decisions on production volumes and electricity prices. We conclude that imposing rigid policies with the aim of limiting the potential for strategic behaviour can create incentives to produce only at very high prices throughout the year. This can lead to very high total costs, especially when the producer has most flexibility (large reservoirs combined with large turbine capacity). More surprisingly, we observe lower total production in a non-liberalised market. (author)

  19. Hydro-MRI for abdominal diagnostics in children; Hydro-MRT in der Darmdiagnostik bei Kindern

    Energy Technology Data Exchange (ETDEWEB)

    Kern, A.; Schunk, K.; Oberholzer, K.; Thelen, M. [Mainz Univ. (Germany). Klinik und Poliklinik fuer Radiologie; Kessler, M. [Mainz Univ. (Germany). Klinik und Poliklinik fuer Kinderchirurgie

    2001-11-01

    A clinical evaluation of hydro-MRI as an alternative method to barium studies in children with abdominal pain of unknown origin is presented. Patients and Methods: 20 children with abdominal pain of unknown origin aged from 9 - 16 years were examined after oral bowel opacification using 1000 ml of 2.5% mannitol solution with a 1.0T MRI system. The investigation was done in 2 planes (coronal and axial) under breath-hold conditions. Imaging procedures included various sequences (T2W HASTE + FS, contrast-enhanced T1W FLASH FS). Suspicious findings in bowel segments and extra-intestinal changes were assessed. Results: In 21/24 examinations the small bowel was completely visualized, in 15/24 cases colon segments were identified. An accurate assessment of the terminal ileum was not possible in 3/24 procedures. Breathing artefacts occurred in 3/24 examinations. Signs of Crohn's disease were found in 4 examinations, inflammatory changes of the ileum were detected in 3 cases. Inflammation of the colon was demonstrated in 2 children. Furthermore, pathological findings included constipation in one child and inflammation of the ileo-colic and mesenterial lymph nodes were found in another child. Extra-intestinal changes in 3 children were caused by ovarian cysts, and in one case by pleural effusion. In 4 examinations we detected ascites in the absence of other pathological findings. In 5 children there was no pathological correlation in the bowel or extra-intestinal region for the complaints. The children tolerated the hydro-MRI very well. There were no side effects using oral mannitol. (orig.) [German] Ziel: Klinische Evaluation der Hydro-MRT bei Kindern mit unklarer abdomineller Symptomatik als alternative Methode zur fraktionierten Magen-Darm-Passage. Patienten und Methoden: 20 Kinder und Jugendliche im Alter von 9 bis 16 Jahren mit unklaren abdominellen Beschwerden bzw. mit Verdacht auf eine chronisch entzuendliche Darmerkrankung wurden nach einer oralen

  20. Final Report - Wind and Hydro Energy Feasibility Study - June 2011

    Energy Technology Data Exchange (ETDEWEB)

    Jim Zoellick; Richard Engel; Rubin Garcia; Colin Sheppard

    2011-06-17

    This feasibility examined two of the Yurok Tribe's most promising renewable energy resources, wind and hydro, to provide the Tribe detailed, site specific information that will result in a comprehensive business plan sufficient to implement a favorable renewable energy project.

  1. Evaluation of HFIR vessel surveillance data and hydro-test conditions

    International Nuclear Information System (INIS)

    Cheverton, R.D.; Nanstad, R.K.

    1994-01-01

    Surveillance specimens for the High Flux Isotope Reactor (HFIR) pressure vessel were removed and tested during 1993, after the vessel had accumulated 701,469 MWd of operation. The data agree well with HFIR surveillance data obtained in previous years. In conjunction with this effort, the vessel hydro-test conditions were reevaluated and found to be more than adequate. In view of this result, and because there are economic incentives for reducing the frequency of hydro testing, an analysis was performed to determine the minimum permissible frequency. The value obtained is substantially less than that presently specified. It was also determined that a somewhat lower cooling-tower-basin temperature is acceptable (improves operational flexibility). In 1986, after ∼20 years of reactor operation, it was discovered that the vessel embrittlement rate was substantially greater than expected. Possible reasons for the accelerated rate are reviewed in this report

  2. Osmo and hydro priming improvement germination characteristics and enzyme activity of Mountain Rye (Secale montanum seeds under drought stress

    Directory of Open Access Journals (Sweden)

    Ansari O.

    2012-11-01

    Full Text Available Impacts of various concentrations of polyetylenglycol 6000 (PEG 6000(0, -9, -11, -13 and -15 bar and hydro priming on Mountain Rye (secale montanum germination characteristic and enzyme activity were evaluated under drought stress in the seed laboratory of Natural Resources Faculty, University of Tehran, Karaj, Iran. Analyze of variance for hydro priming showed that temperature × time of priming interaction was significantly for germination percentage (GP, normal seedling percentage (NSP, coefficient of velocity of germination (CVG, seedling vigor index (SVI, coefficient of allometry (AC and seedling length (SL under drought stress and for osmo priming showed that Concentration of PEG × Temperature × Time of priming interaction was significantly for all traits under drought stress. Results of interaction effects for hydro priming showed that the highest GP (53% and NSP (23.5% were attained from hydro priming for 16h at 15 ◦C and the highest CVG (0.21 and AC (0.49 were attained from hydro priming for 8h at 10 ◦C, also hydro priming for 8h at 15 ◦C increased SL (3.15 as compared to the unprimed.Osmo priming with concentration of -15 bar PEG for 24h at 15 ◦C increased GP (80.5 %, GI (17.9, NSP (45 %, SVI (257.85 and SL (5.73 cm and decreased MTG as compared to the unprimed and other treatments of osmo priming. The highest CVG was attained from concentration of -9 bar PEG for 24h at 10 ◦C. the highest AC was attained from concentration of -9 bar PEG for 12h at 15 ◦C. Also osmo and hydro priming increased catalase (CAT and ascorbate peroxidase (APX as compared to the unprimed.

  3. Hydro-environmental factors and phytoplankton of the Atlantic ...

    African Journals Online (AJOL)

    Hydro-environmental factors and phytoplankton of the Atlantic Ocean, off the Light House Beach, Lagos, Nigeria. ... (28.37±1.88), pH (7.85±0.17), conductivity (44738.75±6262.76 μS/cm), total dissolved solids (29236.71±4273.30 mg/L), salinity (27.11±3.91 ‰), alkalinity (126.99±42.81 mg/L) and chloride (15056.

  4. Exploring the impact of reduced hydro capacity and lignite resources on the Macedonian power sector development

    Directory of Open Access Journals (Sweden)

    Taseska-Gjorgievskaa Verica

    2014-01-01

    Full Text Available The reference development pathway of the Macedonian energy sector highlights the important role that lignite and hydro power play in the power sector, each accounting for 40% of total capacity in 2021. In 2030, this dominance continues, although hydro has a higher share due to the retirement of some of the existing lignite plants. Three sensitivity runs of the MARKAL-Macedonia energy system model have been undertaken to explore the importance of these technologies to the system, considering that their resource may be reduced with time: (1 Reducing the availability of lignite from domestic mines by 50% in 2030 (with limited capacity of imports, (2 Removing three large hydro options, which account for 310 MW in the business-as-usual case, and (3 Both of the above restrictions. The reduction in lignite availability is estimated to lead to additional overall system costs of 0.7%, compared to hydro restrictions at only 0.1%. With both restrictions applied, the additional costs rise to over 1%, amounting to 348 M€ over the 25 year planning horizon. In particular, costs are driven up by an increasing reliance on electricity imports. In all cases, the total electricity generation decreases, but import increases, which leads to a drop in capacity requirements. In both, the lignite and the hydro restricted cases, it is primarily gas-fired generation and imports that “fill the gap”. This highlights the importance of an increasingly diversified and efficient supply, which should be promoted through initiatives on renewables, energy efficiency, and lower carbon emissions.

  5. Temporal variations of NDVI and correlations between NDVI and hydro-climatological variables at Lake Baiyangdian, China.

    Science.gov (United States)

    Wang, Fei; Wang, Xuan; Zhao, Ying; Yang, Zhifeng

    2014-09-01

    In this paper, correlations between vegetation dynamics (represented by the normalized difference vegetation index (NDVI)) and hydro-climatological factors were systematically studied in Lake Baiyangdian during the period from April 1998 to July 2008. Six hydro-climatological variables including lake volume, water level, air temperature, precipitation, evaporation, and sunshine duration were used, as well as extracted NDVI series data representing vegetation dynamics. Mann-Kendall tests were used to detect trends in NDVI and hydro-climatological variation, and a Bayesian information criterion method was used to detect their abrupt changes. A redundancy analysis (RDA) was used to determine the major hydro-climatological factors contributing to NDVI variation at monthly, seasonal, and yearly scales. The results were as follows: (1) the trend analysis revealed that only sunshine duration significantly increased over the study period, with an inter-annual increase of 3.6 h/year (p NDVI trends were negligible; (2) the abrupt change detection showed that a major hydro-climatological change occurred in 2004, when abrupt changes occurred in lake volume, water level, and sunlight duration; and (3) the RDA showed that evaporation and temperature were highly correlated with monthly changes in NDVI. At larger time scales, however, water level and lake volume gradually became more important than evaporation and precipitation in terms of their influence on NDVI. These results suggest that water availability is the most important factor in vegetation restoration. In this paper, we recommend a practical strategy for lake ecosystem restoration that takes into account changes in NDVI.

  6. 76 FR 71961 - KC Hydro LLC of New Hampshire; Notice of Preliminary Permit Application Accepted for Filing and...

    Science.gov (United States)

    2011-11-21

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project No. 14246-000] KC Hydro LLC of..., Motions To Intervene, and Competing Applications On August 8, 2011, KC Hydro LLC of New Hampshire filed an... at the spillway crest elevation; (3) a newly constructed powerhouse; (4) new electrical generating...

  7. The efficiency of different estimation methods of hydro-physical limits

    Directory of Open Access Journals (Sweden)

    Emma María Martínez

    2012-12-01

    Full Text Available The soil water available to crops is defined by specific values of water potential limits. Underlying the estimation of hydro-physical limits, identified as permanent wilting point (PWP and field capacity (FC, is the selection of a suitable method based on a multi-criteria analysis that is not always clear and defined. In this kind of analysis, the time required for measurements must be taken into consideration as well as other external measurement factors, e.g., the reliability and suitability of the study area, measurement uncertainty, cost, effort and labour invested. In this paper, the efficiency of different methods for determining hydro-physical limits is evaluated by using indices that allow for the calculation of efficiency in terms of effort and cost. The analysis evaluates both direct determination methods (pressure plate - PP and water activity meter - WAM and indirect estimation methods (pedotransfer functions - PTFs. The PTFs must be validated for the area of interest before use, but the time and cost associated with this validation are not included in the cost of analysis. Compared to the other methods, the combined use of PP and WAM to determine hydro-physical limits differs significantly in time and cost required and quality of information. For direct methods, increasing sample size significantly reduces cost and time. This paper assesses the effectiveness of combining a general analysis based on efficiency indices and more specific analyses based on the different influencing factors, which were considered separately so as not to mask potential benefits or drawbacks that are not evidenced in efficiency estimation.

  8. Hydro-dam - A nature-based solution or an ecological problem: The fate of the Tonlé Sap Lake.

    Science.gov (United States)

    Lin, Zihan; Qi, Jiaguo

    2017-10-01

    Recent proliferation of hydro-dams was one of the nature-based solutions to meet the increasing demand for energy and food in the Lower Mekong River Basin (LMRB). While construction of these hydro-dams generated some hydropower and facilitated expansion of irrigated lands, it also significantly altered the basin-wide hydrology and subsequently impacted wetland ecosystems. Unintended adverse consequences of ecosystem services from lakes and wetlands offset the intended gains in hydroelectricity and irrigated agriculture. The trade-offs between gains in energy and food production and losses in aquatic ecosystem services were perceived to be significant but knowledge of the magnitude, spatial extent, and type of ecosystem services change is lacking and, therefore, the question whether the hydro-dam is an optimized solution or a potential ecological problem remains unanswered. In this study, as the first step to answer this question and using the Tonlé Sap Lake as an example, we quantified one of the impacts of hydro-dams on lake ecosystem's phenology in terms of open water area, a critical ecological characteristic that affects lake systems' fish production, biodiversity, and livelihoods of the local communities. We used the MODIS-NDVI time series, forecast function and the Mann-Kendall trend test method to first quantify the open water area, analyzed its changes over time, and then performed correlation analysis with climate variables to disentangle dam impacts. The results showed reduced hydro-periods, diminishing lake seasonality and a declining trend in Tonlé Sap Lake open water area over the past 15 years. These changes were insignificantly related to climatic influence during the same period. It is concluded that basin-wide hydro-dam construction and associated agricultural irrigation were deemed to be the primary cause of these ecological changes. Further analyses of changes in the lake's ecosystem services, including provision and cultural services, need to

  9. Energy efficiency at Hydro-Quebec: Why forget the substitution of electricity by natural gas?

    International Nuclear Information System (INIS)

    Bernard, J.-T.

    1994-01-01

    Hydro-Quebec has launched an energy program which will cost $1.9 billion and which intends to save 9.3 TWh of electricity consumption by the year 2000, equivalent to 5.6% of the forecasted electricity consumption. The program only considers electricity and ignores other energy sources. An analysis is conducted to determine whether the subsidies that Hydro-Quebec is prepared to spend in each sector of the program would be sufficient to make up the difference between the cost of electricity and that of natural gas for the end-user. A positive response to this question will allow identification of a less costly way that Hydro-Quebec could realize its energy efficiency objectives. The analysis takes into account the marginal cost of electricity production, the average cost of energy efficiency measures, electricity prices, and the prices of natural gas and of gas-burning equipment. The results of a detailed analysis of four typical cases in the residential and commercial sectors indicate that market segments exist in which an energy efficiency program that includes substitution of other forms of energy for electricity would be preferable to a simple reduction in electricity consumption. However, the rationale for the Hydro-Quebec program is that electricity prices are based on historical average costs; as a result, electricity prices are lower than marginal costs. This problem should be addressed before considering expensive energy efficiency programs where the least-cost alternative is not even considered. 5 refs., 1 fig., 2 tabs

  10. Workshop on the role of enhancement of utilization of primary and secondary hydro potential in the context of environmental protection. Part I

    International Nuclear Information System (INIS)

    1997-01-01

    The publication has been set up as proceedings of the workshop on the role of enhancement of utilization of primary and secondary hydro potential in the context of environmental protection. The proceedings consist of the following chapters: (1) BOT schemes as financial model of hydro power projects; (2) Application of pumped storage plants in the control of the Slovak power system and the possibility of pumped storage plant Ipel exploitation towards the year 2010; (3) Use of hydro energetic potential of streams from the aspects of nature conservation on the example of north Slovakia; (4) Ecological aspects of the hydro power industry and possible means to improve ecological conditions of water reservoirs; (5) Preparation and realization of HPP Zilina; (6) Freudenau HPP. ecological measures and groundwater management; (7) Present state of hydro power development in Austria

  11. Coupling X-band dual-polarized mini-radars and hydro-meteorological forecast models: the HYDRORAD project

    Directory of Open Access Journals (Sweden)

    E. Picciotti

    2013-05-01

    Full Text Available Hydro-meteorological hazards like convective outbreaks leading to torrential rain and floods are among the most critical environmental issues world-wide. In that context weather radar observations have proven to be very useful in providing information on the spatial distribution of rainfall that can support early warning of floods. However, quantitative precipitation estimation by radar is subjected to many limitations and uncertainties. The use of dual-polarization at high frequency (i.e. X-band has proven particularly useful for mitigating some of the limitation of operational systems, by exploiting the benefit of easiness to transport and deploy and the high spatial and temporal resolution achievable at small antenna sizes. New developments on X-band dual-polarization technology in recent years have received the interest of scientific and operational communities in these systems. New enterprises are focusing on the advancement of cost-efficient mini-radar network technology, based on high-frequency (mainly X-band and low-power weather radar systems for weather monitoring and hydro-meteorological forecasting. Within the above context, the main objective of the HYDRORAD project was the development of an innovative mbox{integrated} decision support tool for weather monitoring and hydro-meteorological applications. The integrated system tool is based on a polarimetric X-band mini-radar network which is the core of the decision support tool, a novel radar products generator and a hydro-meteorological forecast modelling system that ingests mini-radar rainfall products to forecast precipitation and floods. The radar products generator includes algorithms for attenuation correction, hydrometeor classification, a vertical profile reflectivity correction, a new polarimetric rainfall estimators developed for mini-radar observations, and short-term nowcasting of convective cells. The hydro-meteorological modelling system includes the Mesoscale Model 5

  12. Method for assessing wind power integration in a hydro based power system

    International Nuclear Information System (INIS)

    Norheim, I.; Palsson, M.; Tande, J.O.G.; Uhlen, K.

    2006-01-01

    The present paper demonstrates a method for assessment of how much wind power that can be integrated in a system with limited transmission capacity. Based on hydro inflow data and wind measurements (for different locations of planned wind farms in an area) it is possible to assess how much wind power that can be fed into a certain point in the transmission network without violating the transmission capacity limits. The proposed method combines the use of market modelling and detailed network analysis in order to assess the probability of network congestions rather than focusing on extreme cases. By computing the probability distribution of power flow on critical corridors in the grid it is possible to assess the likelihood of network congestions and the amount of energy that must be curtailed to fulfil power system security requirements (n-1). This way the assessment is not only made of worst case scenarios, assuming maximal flow from hydro plants and maximal wind power production. As extreme case scenarios are short term and may be solved by market mechanisms or automatic system protection schemes (disconnection of wind power or hydro power), the proposed method may reveal that it would be economic to install more wind power than if only based on analysis of worst case scenarios. (orig.)

  13. Experimental Hydro-Mechanical Characterization of Full Load Pressure Surge in Francis Turbines

    Science.gov (United States)

    Müller, A.; Favrel, A.; Landry, C.; Yamamoto, K.; Avellan, F.

    2017-04-01

    Full load pressure surge limits the operating range of hydro-electric generating units by causing significant power output swings and by compromising the safety of the plant. It appears during the off-design operation of hydraulic machines, which is increasingly required to regulate the broad integration of volatile renewable energy sources into the existing power network. The underlying causes and governing physical mechanisms of this instability were investigated in the frame of a large European research project and this paper documents the main findings from two experimental campaigns on a reduced scale model of a Francis turbine. The multi-phase flow in the draft tube is characterized by Particle Image Velocimetry, Laser Doppler Velocimetry and high-speed visualizations, along with synchronized measurements of the relevant hydro-mechanical quantities. The final result is a comprehensive overview of how the unsteady draft tube flow and the mechanical torque on the runner shaft behave during one mean period of the pressure oscillation, thus defining the unstable fluid-structure interaction responsible for the power swings. A discussion of the root cause is initiated, based on the state of the art. Finally, the latest results will enable a validation of recent RANS flow simulations used for determining the key parameters of hydro-acoustic stability models.

  14. The Statoil/Hydro fusion in a continental shelf perspective

    International Nuclear Information System (INIS)

    Osmundsen, Petter

    2007-01-01

    The article analysis the consequences of the Statoil/Hydro merger on the development on the Norwegian continental shelf. Various indicators of results of the market power the merger are presented and the effects of reduced competition on the markets are discussed. The advantages of the merger on the activities on the shelf are analyzed. (tk)

  15. 76 FR 71960 - KC Hydro LLC of New Hampshire; Notice of Preliminary Permit Application Accepted for Filing and...

    Science.gov (United States)

    2011-11-21

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project No. 14247-000] KC Hydro LLC of..., Motions To Intervene, and Competing Applications On August 8, 2011, KC Hydro LLC of New Hampshire filed an... spillway elevation of 130 feet mean sea level (msl); (3) connecting new electrical [[Page 71961...

  16. Distributed power in Afghanistan: The Padisaw micro-hydro project

    International Nuclear Information System (INIS)

    Hallett, Michael

    2009-01-01

    The provision of electricity is a vital need in reconstruction and development situations, like that in Afghanistan. Indeed, according to the Afghan government's Afghan National Development Strategy (ANDS) the need for electricity featured in 80% of the Provincial Development Plans as a top priority. With the help of the International Community, the government of Afghanistan is attempting to develop a new market oriented approach to the nationwide provision of electrical power. Although the bulk of the electrification effort is directed toward large scale construction of a national grid, the ANDS explicitly mentions a role for 'micro-hydro, solar, waste and small scale diesel power and energy generating sources'. This article will describe a micro-hydro project in Padisaw village, in the Nurgaram district of Nuristan province located in Northeastern Afghanistan and the role Provincial Reconstruction Team played in working with the local community through the project planning and building processes and offer some observation on how, as the Afghan National Development Strategy is executed, the private sector can play an increasingly significant role in the Afghan distributed energy arena. (author)

  17. Hydro One smart meter/smart grid : realizing the vision

    Energy Technology Data Exchange (ETDEWEB)

    Stevens, R. [Hydro One Networks Inc., Toronto, ON (Canada)

    2010-07-01

    Ontario's Hydro One Networks has been installing smart meters as part of its smart grid plan since 2007. The smart grid plan forms part of the utility's overall aim to create an energy conservation culture across the province. The utility now has over 1 million installed meters over a 640,000{sup 2} km territory. The smart grid planning team has adopted the use of an upgraded open protocol standards-based communications as part of its 2-way high bandwidth network. The utility is using a 1.8 Ghz worldwide interoperability for microwave access (WiMAX) spectrum designed specifically for the protection of electric utility infrastructure. The utility is now incorporating proof-of-concept applications including automated reclosers, remote terminal units, demand management devices and mobile technologies for use in its smart grid procedures. Various smart zone business scenarios were also described in this power point presentation, as well as details of Hydro One's integration plans for vendors and other power systems. tabs., figs.

  18. Intercomparison of Streamflow Simulations between WRF-Hydro and Hydrology Laboratory-Research Distributed Hydrologic Model Frameworks

    Science.gov (United States)

    KIM, J.; Smith, M. B.; Koren, V.; Salas, F.; Cui, Z.; Johnson, D.

    2017-12-01

    The National Oceanic and Atmospheric Administration (NOAA)-National Weather Service (NWS) developed the Hydrology Laboratory-Research Distributed Hydrologic Model (HL-RDHM) framework as an initial step towards spatially distributed modeling at River Forecast Centers (RFCs). Recently, the NOAA/NWS worked with the National Center for Atmospheric Research (NCAR) to implement the National Water Model (NWM) for nationally-consistent water resources prediction. The NWM is based on the WRF-Hydro framework and is run at a 1km spatial resolution and 1-hour time step over the contiguous United States (CONUS) and contributing areas in Canada and Mexico. In this study, we compare streamflow simulations from HL-RDHM and WRF-Hydro to observations from 279 USGS stations. For streamflow simulations, HL-RDHM is run on 4km grids with the temporal resolution of 1 hour for a 5-year period (Water Years 2008-2012), using a priori parameters provided by NOAA-NWS. The WRF-Hydro streamflow simulations for the same time period are extracted from NCAR's 23 retrospective run of the NWM (version 1.0) over CONUS based on 1km grids. We choose 279 USGS stations which are relatively less affected by dams or reservoirs, in the domains of six different RFCs. We use the daily average values of simulations and observations for the convenience of comparison. The main purpose of this research is to evaluate how HL-RDHM and WRF-Hydro perform at USGS gauge stations. We compare daily time-series of observations and both simulations, and calculate the error values using a variety of error functions. Using these plots and error values, we evaluate the performances of HL-RDHM and WRF-Hydro models. Our results show a mix of model performance across geographic regions.

  19. The development, qualification and availability of AECL analytical, scientific and design codes

    International Nuclear Information System (INIS)

    Kupferschmidt, W.C.H.; Fehrenbach, P.J.; Wolgemuth, G.A.; McDonald, B.H.; Snell, V.G.

    2001-01-01

    Over the past several years, AECL has embarked on a comprehensive program to develop, qualify and support its key safety and licensing codes, and to make executable versions of these codes available to the international nuclear community. To this end, we have instituted a company-wide Software Quality Assurance (SQA) Program for Analytical, Scientific and Design Computer Programs to ensure that the design, development, maintenance, modification, procurement and use of computer codes within AECL is consistent with today's quality assurance standards. In addition, we have established a comprehensive Code Validation Project (CVP) with the goal of qualifying AECL's 'front-line' safety and licensing codes by 2001 December. The outcome of this initiative will be qualified codes, which are properly verified and validated for the expected range of applications, with associated statements of accuracy and uncertainty for each application. The code qualification program, based on the CSA N286.7 standard, is intended to ensure (1) that errors are not introduced into safety analyses because of deficiencies in the software, (2) that an auditable documentation base is assembled that demonstrates to the regulator that the codes are of acceptable quality, and (3) that these codes are formally qualified for their intended applications. Because AECL and the Canadian nuclear utilities (i.e., Ontario Power Generation, Bruce Power, Hydro Quebec and New Brunswick Power) generally use the same safety and licensing codes, the nuclear industry in Canada has agreed to work cooperatively together towards the development, qualification and maintenance of a common set of analysis tools, referred to as the Industry Standard Toolset (IST). This paper provides an overview of the AECL Software Quality Assurance Program and the Code Validation Project, and their associated linkages to the Canadian nuclear community's Industry Standard Toolset initiative to cooperatively qualify and support commonly

  20. Main coolant pump testing at Ontario Hydro

    International Nuclear Information System (INIS)

    Hartlen, R.

    1991-01-01

    This article describes Ontario Hydro Research Division's experience with a computerized data acquisition and analysis system for monitoring mechanical vibration in reactor coolant pumps. The topics covered include bench-marking of the computer system and the coolant pumps, signatures of normal and malfunctioning pumps, analysis of data collected by the monitoring system, simulation of faults, and concerns that have been expressed about data interpretation, sensor types and locations, alarm/shutdown limits and confirmation of nondestructive examination testing. This presentation consists of overheads only

  1. The Ontario Hydro mortality surveillance programme

    International Nuclear Information System (INIS)

    Anderson, T.W.

    1985-01-01

    The Ontario Hydro mortality surveillance programme was the first such study established in any group of radiation workers. Copies of annual reports are available to senior officials of both management and union and to members of the general public. Apart from an elevated Standardized Mortality Ratio in the 15.0 - 19.9 cSv range, there is no suggestion of any rising cancer death rate with increased lifetime radiation dose. It should be noted that employees who had left before pensionable age were not included in the study. Results of the study are presented in tabular form

  2. Fuzzy interpolation of hydro power sales data in Simulink

    DEFF Research Database (Denmark)

    Jantzen, Jan; Eliasson, B.

    1994-01-01

    The problem in this case study can be described as a multi-dimensional surface fit to a given set of data. The data are sales figures in MWH/H for a hydro-thermal power generation system. The data are incomplete and not totally reliable. A model with ten fuzzy rules fits the data with a total error...

  3. The radiation safety self-assessment program of Ontario Hydro

    International Nuclear Information System (INIS)

    Armitage, G.; Chase, W.J.

    1987-01-01

    Ontario Hydro has developed a self-assessment program to ensure that high quality in its radiation safety program is maintained. The self-assessment program has three major components: routine ongoing assessment, accident/incident investigation, and detailed assessments of particular radiation safety subsystems or of the total radiation safety program. The operation of each of these components is described

  4. Risk assessment of hydro projects in the face of climate change - a case study

    International Nuclear Information System (INIS)

    Cheng, W.; Kilduff, T.

    2008-01-01

    As the IPCC's Climate Change 2007 report made clear, warming of the Climate System is unequivocal. It is also clear that warming of the land surface can significantly affect the hydrological systems of snow-fed rivers. Thus, it is prudent to consider the potential impacts of climate change when conducting cost-benefit analysis of hydro-electric system capital improvements. This paper evaluates the benefits to Seattle City Light, Seattle's municipal utility, of an upgrade to one of its hydro-electric projects, not on the basis, as is common, of historical flow data, but on the basis of modeled flows under a specific climate change scenario. Another novelty of the paper is that the analysis relies not on one 'normal' or average flow, but on an ensemble of flows that reflect the range of hydro conditions that might be anticipated under the climate scenario. Although the nature of the anticipated impacts of climate in the Northwest are such that the results are not markedly different from ignoring them, the paper raises a number of interesting issues that such analysis should typically address. (author)

  5. A 100% renewable electricity generation system for New Zealand utilising hydro, wind, geothermal and biomass resources

    International Nuclear Information System (INIS)

    Mason, I.G.; Page, S.C.; Williamson, A.G.

    2010-01-01

    The New Zealand electricity generation system is dominated by hydro generation at approximately 60% of installed capacity between 2005 and 2007, augmented with approximately 32% fossil-fuelled generation, plus minor contributions from geothermal, wind and biomass resources. In order to explore the potential for a 100% renewable electricity generation system with substantially increased levels of wind penetration, fossil-fuelled electricity production was removed from an historic 3-year data set, and replaced by modelled electricity production from wind, geothermal and additional peaking options. Generation mixes comprising 53-60% hydro, 22-25% wind, 12-14% geothermal, 1% biomass and 0-12% additional peaking generation were found to be feasible on an energy and power basis, whilst maintaining net hydro storage. Wind capacity credits ranged from 47% to 105% depending upon the incorporation of demand management, and the manner of operation of the hydro system. Wind spillage was minimised, however, a degree of residual spillage was considered to be an inevitable part of incorporating non-dispatchable generation into a stand-alone grid system. Load shifting was shown to have considerable advantages over installation of new peaking plant. Application of the approach applied in this research to countries with different energy resource mixes is discussed, and options for further research are outlined.

  6. Hydro aerobics as means for physical state improvement of female students

    Directory of Open Access Journals (Sweden)

    N.M. Balamutova

    2013-03-01

    Full Text Available The questions of organization and conducting studies were considered by using system of hydro aerobics exercises for improving physical training of female students. Sixty female students took part in the experiment. All the tested girls were divided into two groups, 30 persons each. The tested group of female students made aerobic exercises on the dry land according to a plan. The female students of experimental group made hydro aerobics exercises according to the programme. Several methods were used: anthropometry, control methods of the functional parameters of the body, testing of the physical training indicators, methods of mathematical statistics. The reliable positive improvements of cardiovascular and respiratory systems were in the experimental group of the girls. The effect of the reliable decrease of fat mass of the tested female students was exposed among anthropometrical characteristics.

  7. Hydro-elastic analysis and optimization of a composite marine propeller

    DEFF Research Database (Denmark)

    Blasques, José Pedro Albergaria Amaral; Berggreen, Christian; Andersen, Poul

    2010-01-01

    The present paper addresses the design and optimization of a flexible composite marine propeller. The aim is to tailor the laminate to control the deformed shape of the blade and consequently the developed thrust. The development of a hydro-elastic model is presented, and the laminate lay-up which...

  8. Global warming: a changing climate for hydro

    International Nuclear Information System (INIS)

    Oud, E.

    1993-01-01

    This paper quantifies the benefits attributable to hydroelectric power generation in preventing carbon dioxide emissions from the use of thermal plants. It proposes that utilities and funding agencies consider the societal costs associated with the emission of CO 2 in power system planning. It also suggests that the industrialized countries should consider changing their funding practice and give more appropriate credits for the construction of hydro plants in developing countries, with a view to avoiding the construction and operation of fossil fuelled powerplants. (author)

  9. Use of a scenario-neutral approach to identify the key hydro-meteorological attributes that impact runoff from a natural catchment

    Science.gov (United States)

    Guo, Danlu; Westra, Seth; Maier, Holger R.

    2017-11-01

    Scenario-neutral approaches are being used increasingly for assessing the potential impact of climate change on water resource systems, as these approaches allow the performance of these systems to be evaluated independently of climate change projections. However, practical implementations of these approaches are still scarce, with a key limitation being the difficulty of generating a range of plausible future time series of hydro-meteorological data. In this study we apply a recently developed inverse stochastic generation approach to support the scenario-neutral analysis, and thus identify the key hydro-meteorological variables to which the system is most sensitive. The stochastic generator simulates synthetic hydro-meteorological time series that represent plausible future changes in (1) the average, extremes and seasonal patterns of rainfall; and (2) the average values of temperature (Ta), relative humidity (RH) and wind speed (uz) as variables that drive PET. These hydro-meteorological time series are then fed through a conceptual rainfall-runoff model to simulate the potential changes in runoff as a function of changes in the hydro-meteorological variables, and runoff sensitivity is assessed with both correlation and Sobol' sensitivity analyses. The method was applied to a case study catchment in South Australia, and the results showed that the most important hydro-meteorological attributes for runoff were winter rainfall followed by the annual average rainfall, while the PET-related meteorological variables had comparatively little impact. The high importance of winter rainfall can be related to the winter-dominated nature of both the rainfall and runoff regimes in this catchment. The approach illustrated in this study can greatly enhance our understanding of the key hydro-meteorological attributes and processes that are likely to drive catchment runoff under a changing climate, thus enabling the design of tailored climate impact assessments to specific

  10. Rate proposal for 1993 and 1994 [Hydro-Quebec

    International Nuclear Information System (INIS)

    1994-01-01

    In its development plan, Hydro-Quebec has the goal of aligning its average rate increases with the inflation rate over the period 1993-2000. The near- and long-term evolution of rates must also follow the evolution of the costs of supply and assure the financial stability of the utility. The average annual increase target prices for 1993-95 is 3.5%. In 1993, the increase in supply cost is attributable to startup of service from the LaGrande 2-A and Becancour stations, as well as to energy efficiency programs and improvements in quality of service. In 1994-95, supply cost increases are related mainly to the second phase of the LaGrande complex. The present rate proposal is for two years and assures that rates will not increase beyond the projected rates of inflation of 2.3% for 1993 and 2.7% for 1994. Hydro-Quebec also has a long-term objective of gradually reducing cross-subsidization that exists among different tariff categories. A slight differentiation of rate increases in the various categories is proposed to reduce this cross-subsidization. The proposed rate increases are expected to bring additional revenues of $152 million for 1993/94 and $186 million for 1994/95. 3 figs., 35 tabs

  11. Hydro Ottawa Holding Inc. 2004 annual report : 3 ways to make 1 powerful connection

    International Nuclear Information System (INIS)

    2005-01-01

    An overview of the municipally owned Hydro Ottawa Holding Inc. was presented in this annual report. In 2004, the utility moved out of a deficit position for the first time in its 4 year history. Consolidated net earnings from continuing and discontinued operations increased to $19.7 million from $2.6 million. The increase was due mainly to decreases in operating, maintenance and administrative costs, as well as to the recovery of the cost of regulatory assets and the gain on the disposal of discontinued operations. As a result, the Corporation's deficit of $16.9 million became retained earnings of $2.8 million. Financial highlights were presented, as well as a comparison of distributors' charges with other utilities. It was noted that transparency and accountability were improved with more regular reporting to its shareholder, the City of Ottawa. In late 2004, City Council approved Hydro Ottawa Holding's 5 year consolidated financial plan which recommended that the City invest $37.8 million back into the Corporation and receive payment of the balance. The payback of the City's loan was financed through the Corporation's placement, in 2005, of $200 million in bonds. New programs included a trash-to-electricity contract, a bounty on energy-wasting fridges, and Telecom Ottawa's Data Backup and Recovery Service. Hydro Ottawa Holding Inc. is an amalgamation of 5 Ottawa-area utilities, and now provides leadership to 3 subsidiaries: Hydro Ottawa Ltd., Energy Ottawa Inc., and Telecom Ottawa Holding Inc.. Financial highlights of the 3 subsidiaries were also provided. tabs., figs

  12. Water resources management using the WRF-Hydro modelling system: Case-study of the Tono dam in West Africa

    Directory of Open Access Journals (Sweden)

    E. Naabil

    2017-08-01

    Full Text Available Water resources are a major source of economic development for most West African (WA countries. There is, however inadequate information on these resources for the purposes of planning, decision-making and management. This paper explores the potential for using a state of the art hydrological model (WRF-Hydro in a fully coupled (i.e. land surface hydrology-atmosphere mode to assess these water resources, particularly the Tono basin in Ghana. The WRF-Hydro model is an enhanced version of the Weather Research and Forecasting model (WRF which allows simulating river discharge. A 2-domain configuration is chosen: an outer domain at 25 km horizontal resolution encompassing the West African Region and an inner domain at 5 km horizontal resolution centered on the Tono basin. The infiltration partition parameter and Manning’s roughness parameter were calibrated to fit the WRF-Hydro simulated discharge with the observed data. The simulations were done from 1999 to 2003, using 1999 as a spin-up period. The results were compared with TRMM precipitation, CRU temperature and available observed hydrological data. The WRF-Hydro model captured the attributes of the “observed” streamflow estimate; with Nash-Sutcliff efficiency (NSE of 0.78 and Pearson’s correlation of 0.89. Further validation of model results is based on using the output from the WRF-Hydro model as input into a water balance model to simulate the dam levels. WRF-Hydro has shown the potential for use in water resource planning (i.e. with respect to streamflow and dam level estimation. However, the model requires further improvement with respect to calibration of model parameters (e.g. baseflow and saturated hydraulic conductivity considering the effect of the accumulation of model bias in dam level estimation.

  13. Geographic information systems - tool for evaluation of the hydro-energy performance of water supply systems

    OpenAIRE

    Aline Christian Pimentel Almeida Santos; José Almir Rodrigues Pereira; Augusto da Gama Rego; Rogério da Silva Santos

    2017-01-01

    The most relevant challenges in the water supply system (WSS) are high water losses and the waste of electric energy. This paper aimed to assess the capacity of the Geographic Information System (GIS) in the analysis of the hydro-energy performance of WSSs. The Stage 1 comprises the selection of data and the respective hydro-energy indexes are defined; cartographic data are defined in Stage 2 and a geo-referenced database is constructed in Stage 3. In the stage 4, the data of the Central Wate...

  14. VT Data - Lidar Hydro-enforced DEM (0.7m) 2015, Windham County

    Data.gov (United States)

    Vermont Center for Geographic Information — (Link to Metadata) This metadata applies to the following collection area(s): Windham County 2015 0.7m and Hydro Enforced Digital Elevation Model (DEMHE) dataset....

  15. Data and Models as Social Objects in the HydroShare System for Collaboration in the Hydrology Community and Beyond

    Science.gov (United States)

    Tarboton, D. G.; Idaszak, R.; Horsburgh, J. S.; Ames, D. P.; Goodall, J. L.; Band, L. E.; Merwade, V.; Couch, A.; Hooper, R. P.; Maidment, D. R.; Dash, P. K.; Stealey, M.; Yi, H.; Gan, T.; Castronova, A. M.; Miles, B.; Li, Z.; Morsy, M. M.; Crawley, S.; Ramirez, M.; Sadler, J.; Xue, Z.; Bandaragoda, C.

    2016-12-01

    How do you share and publish hydrologic data and models for a large collaborative project? HydroShare is a new, web-based system for sharing hydrologic data and models with specific functionality aimed at making collaboration easier. HydroShare has been developed with U.S. National Science Foundation support under the auspices of the Consortium of Universities for the Advancement of Hydrologic Science, Inc. (CUAHSI) to support the collaboration and community cyberinfrastructure needs of the hydrology research community. Within HydroShare, we have developed new functionality for creating datasets, describing them with metadata, and sharing them with collaborators. We cast hydrologic datasets and models as "social objects" that can be shared, collaborated around, annotated, published and discovered. In addition to data and model sharing, HydroShare supports web application programs (apps) that can act on data stored in HydroShare, just as software programs on your PC act on your data locally. This can free you from some of the limitations of local computing capacity and challenges in installing and maintaining software on your own PC. HydroShare's web-based cyberinfrastructure can take work off your desk or laptop computer and onto infrastructure or "cloud" based data and processing servers. This presentation will describe HydroShare's collaboration functionality that enables both public and private sharing with individual users and collaborative user groups, and makes it easier for collaborators to iterate on shared datasets and models, creating multiple versions along the way, and publishing them with a permanent landing page, metadata description, and citable Digital Object Identifier (DOI) when the work is complete. This presentation will also describe the web app architecture that supports interoperability with third party servers functioning as application engines for analysis and processing of big hydrologic datasets. While developed to support the

  16. A study of hydro-elastic instabilities of a weir

    International Nuclear Information System (INIS)

    Lacroix, C.; Viollet, P.L.

    1987-01-01

    Following low-frequency oscillations which appeared during the initial isothermal tests of Super-Phenix, LNH developed a scale model together with an analytical model approach. The hydro-elastic model allowed to set the phenomena to evidence and quantify the depending parameters influence, while the analytical approach allowed to have a better understanding of the phenomena and of the main parameters dependence [fr

  17. A Statistic Analysis Of Romanian Seaside Hydro Tourism

    OpenAIRE

    Secara Mirela

    2011-01-01

    Tourism represents one of the ways of spending spare time for rest, recreation, treatment and entertainment, and the specific aspect of Constanta County economy is touristic and spa capitalization of Romanian seaside. In order to analyze hydro tourism on Romanian seaside we have used statistic indicators within tourism as well as statistic methods such as chronological series, interdependent statistic series, regression and statistic correlation. The major objective of this research is to rai...

  18. BC Hydro's integrated resource planning : the 2004 IEP and beyond

    International Nuclear Information System (INIS)

    Soulsby, R.

    2004-01-01

    An outline of BC Hydro Integrated Electricity Plan (IEP) was presented in this paper, along with details of its environmental, social and business performance and statistics of its net income and revenue for 2003-2004. The IEP was created to match long term load to supply in the most cost-effective way and is also the basis for resource acquisition plans. In addition, the IEP models performance of portfolios of resources on a system-wide basis, considers uncertainties through sensitivity analysis and measures and evaluates multiple attributes from various portfolios. A flow chart of processes informed by the IEP was presented. Guiding principles behind the creation of the plan include low electricity rates and public ownership; secure, reliable supply; private sector development; environmental responsibility, with no nuclear power sources; ensuring energy self-sufficiency; and maintaining a balanced portfolio of resources. A pie chart of BC Hydro's current portfolio mix was presented as well as a supply and demand outlook and details of plans and new capacity resources required before 2013. Various resource options were presented. Key outcomes of First Nations and stakeholder engagement include the acceptance of BC Hydro as a sustainable energy company; a desire for higher priority on reliability and low cost; an agreement over the Power Smart 10 year plan; a general agreement that the current, balanced approach to resource acquisition was appropriate; and a desire for more rate options. There was an assurance that BC Hydro would continue to engage First Nations and stakeholders in integrated electricity planning. Other outcomes included requests for more information about outage and outage planning and process improvements; support to maintain low rates; a preference for maximizing use of existing facilities; support for wood waste cogeneration. A broad range of options were reviewed, but no superior portfolio was identified within the parameters of this paper

  19. Treatment of Displaced Indigenous Populations in Two Large Hydro Projects in Panama

    Directory of Open Access Journals (Sweden)

    Mary Finley-Brook

    2010-06-01

    Full Text Available Consultation practices with affected populations prior to hydro concessions often remained poor in the decade since the World Commission on Dams (WCD although, in some cases the involvement of local people in the details of resettlement has improved. Numerous international and national actors, such as state agencies, multilateral banks, corporate shareholders, and pro-business media, support the development of dams, but intergovernmental agencies struggle to assure the protection of fundamental civil, human, and indigenous rights at the permitting and construction stages. We analyse two large-scale Panamanian dams with persistent disrespect for indigenous land tenure. Free, prior, and informed consent was sidestepped even though each dam required or will require Ngöbe, Emberá, or Kuna villages to relocate. When populations protested, additional human rights violations occurred, including state-sponsored violence. International bodies are slowly identifying and denouncing this abuse of power. Simultaneously, many nongovernmental organisations (NGOs seek change in Panama consistent with WCD’s good-practice guidelines. A number of NGOs have tied hydro projects to unethical greenhouse gas (GHG emissions trade. As private and state institutions market formerly collective water and carbon resources for profit, these Panamanian cases have become central to a public debate over equitable and green hydro development. Media communication feeds disputes through frontline coverage of cooperation and confrontation.

  20. Experimental condition in the preparation of catalysts for Hydro treatment

    International Nuclear Information System (INIS)

    Gomez P, Alvaro

    1998-01-01

    In this work, by means of an exhaustive bibliographical revision and in a methodical way, they seek to settle down, the characteristics of the catalysts for Hydro treatment (HDT) on those that it is necessary to act with the purpose of obtaining more active, selective and resistant catalysts to the deactivation