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Numerical Flow Simulation in Turbine mode of Counter-Rotating Type pumping Unit to Cooperate with Wind Turbine

Journal of Energy and Power Engineering 2013年第9期7卷 1770-1777页

作者： Tengen Murakami Toshiaki Kanemoto Gohki Takano Risa Kasahara Faculty of Engineering Kyushu Institute of Technology Fukuoka 804-8550 Japan Graduate School of Engineering Kyushu Institute of Technology Fukuoka 804-8550 Japan

This serial research has proposed the hybrid power system combined the wind power unit with the counter-rotating type pump-turbine unit, to provide the constant output for the grid system, even at the suddenly fluctuating/turbulent wind circumstance. In this paper, the tandem impellers prepared for the counter-rotating type pumping unit were operated at the turbine mode, and the performances and the flow conditions were investigated numerically with accompanying the experimental results. Even though providing the pumping unit for the turbine mode, the maximum hydraulic efficiency is close to one of the counter-rotating type hydroelectric unit designed exclusively for the turbine mode. Besides, the runners/impellers of the unit work evidently so as to coincide the angular momentum change through the front runners/impellers with that through the rear runners/impellers, namely to take the axial flow at not only the inlet but also the outlet, without the guide vanes. From these results, it can be concluded that this type unit is effective to work at not only the pumping but also the turbine modes.

关键词： Pump-turbine pumping mode turbine mode power supply grid system counter-rotation.

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Counter-Rotating Type Pump-Turbine Unit Cooperating with Wind Power Unit

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Journal of Thermal Science 2013年第1期22卷 7-12页

作者： Tengen Murakami Toshiaki Kanemoto Faculty of Engineering Kyushu Institute of Technology

This serial research proposes the hybrid power system combined the wind power unit with the counter-rotating type pump-turbine unit,to provide the constant output for the grid system,even at the suddenly fluctuating/turbulent *** this paper,the tandem impellers of the counter-rotating type pumping unit was operated at the turbine mode,and the performances and the flow conditions were investigated numerically and *** 3-D turbulent flows in the runners were simulated at the steady state condition by using the commercial CFD code of ANSYS-CFX ver.12 with the SST turbulence *** providing the pump unit for the turbine mode,the maximum hydraulic efficiency is close to one of the counter-rotating type hydroelectric unit designed exclu-sively for the turbine ***,the runner/impeller of the unit works evidently so as to coincide the angularmomentum change through the front runners/impellers with that through the rear runners/impellers,namely to take the axial flow at not only the inlet but also the outlet without the guide *** results show that this type of unit is effective to work at not only the pumping but also the turbine modes.

关键词： pump-turbine pumping mode turbine mode power supply counter-rotation

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