نتایج جستجو برای: hydropower

تعداد نتایج: 3798  

2014
F. Behrouzi A. Maimun M. Nakisa

The growth of population, rising fossil fuel prices (limited and decreasing day by day), pollution problem due to use of fossil fuels and increasing electrical demand are important factors that encourage the use of green and renewable energy technologies. Among the different renewable energy technologies, hydro power generation (large and small scale) is the prime choice in terms of contributio...

2014
Xiaodong Yu Jian Zhang Ling Zhou

Based on the theory of hydraulic transients and the method of characteristics (MOC), a mathematic model of the differential surge tank with pressure-reduction orifices (PROs) and overflow weirs for transient calculation is proposed. The numerical model of hydraulic transients is established using the data of a practical hydropower station; and the probable transients are simulated. The results ...

2009
J. I. Pérez-Díaz

This paper presents part of the work carried out within the framework of a research project entitled Application of variable speed and intelligent control technologies to hydropower generation. Specifically, it is focused on the activities performed in order to achieve one of the main objectives of the project: the design of a water level control system for a low-head run-of-river variable spee...

2018
Li Huang Jian Huang Wei Wang

Resettlement affects not only the resettlers' production activities and life but also, directly or indirectly, the normal operation of power stations, the sustainable development of the resettlers, and regional social stability. Therefore, a scientific evaluation index system for the sustainable development of reservoir resettlement must be established that fits Chinese national conditions and ...

2016
Jamie Pittock David Dumaresq Andrea M. Bassi Marko Keskinen Olli Varis

An increasing global population and growing wealth are raising demand for energy and food, impacting on the environment and people living in river basins. Sectoral decision-making may not optimize socio-economic benefits because of perverse impacts in other sectors for people and ecosystems. The hydropower–food supply nexus in the Mekong River basins is assessed here in an influence model. This...

2017
H K Zhang Z Liang X B Liu D M Liu M G Deng H Y Wang

The efficiency test is an important indicator to evaluate the energy conversion performance of a hydraulic turbine. For hydropower stations which do not have the direct flow measurement conditions, whether the characteristic curve of a turbine obtained through similarity theory conversion by using the comprehensive characteristic curve of the turbine can correctly reflect the operating performa...

Journal: :Hydro Nepal: Journal of Water, Energy and Environment 1970

2011
W. Eugster T. DelSontro S. Sobek

Eddy covariance flux measurements confirm extreme CH4 emissions from a Swiss hydropower reservoir and resolve their short-term variability W. Eugster, T. DelSontro, and S. Sobek ETH Zurich, Institute of Agricultural Sciences, 8092 Zurich, Switzerland Eawag, Swiss Federal Institute of Aquatic Science and Technology, Kastanienbaum, Switzerland ETH Zurich, Institute for Biogeochemistry and Polluta...

Journal: :CoRR 2016
Matteo Gardini Aurora Manicardi

Nowadays hydroelectric energy is one of the best energy sources: it is cleaner, safer and more programmable than other sources. For this reason, its manage could not be done in an approssimative way, but advance mathematical models must be use. In this article we consider an overview of the problem: we introduce the problem, then we show its simplest but quite exaustive mathematical formulation...

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