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Floating Type Ocean Wave Power Station Equipped with Hydroelectric Unit

Journal of Thermal Science 2013年第5期22卷 467-471页

作者： Shun Okamoto Toshiaki Kanemoto toshihiko umekage Kyushu Institute of Technology Sensui 1-1 Tobata Kitakyushu 804-8550 Japan

The authors have invented the unique ocean wave power station,which is composed of the floating type platform with a pair of the floats lining up at the interval of one wave pitch and the counter-rotating type wave power unit,its runners are submerged in the seawater at the middle position of the *** profiles make the flow velocity at the runner is twice faster than that of the traditional fixed/caisson type OWC,on the ideal flow ***,the runners counter-rotate the inner and the outer armatures of the peculiar generator,respectively,and the relative rotational speed is also twice faster than the speed of the single runner/*** characteristics make the runner diameter large,namely the output higher,as requested,because the torque of the power unit never act on the floating type *** the preliminary reseach,this paper verifies to get the power using a Wells type single runner installed in the model *** runner takes the output which is affected by the oscillating amplitude of the platform,the rotational speed and the inertia force of the runner,etc.

关键词： Renewable energy Ocean wave Float Platform Counter-rotation Power unit

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Flow around Wells Type Runner Installed in Floating Type Unique Ocean Wave Power Station

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Journal of Energy and Power Engineering 2014年第11期8卷 1974-1981页

作者： Shun Okamoto Toshiaki Kanemoto Huang Bin toshihiko umekage Graduate School of Engineering Kyushu Institute of Technology Kitakyushu 804-8550 Japan Faculty of Engineering Kyushu Institute of Technology Kitakyushu 804-8550 Japan

The authors have proposed the unique ocean wave power station, which is composed of the floating type platform with a pair of floats lining up at the interval of one wave pitch and the power unit where the runners are submerged at the middle of the platform. Such a profile can make the flow velocity at the runner twice faster than that of OWC （oscillating water column） type constructed adjacent to the seashore. The behavior of the platform in the wave has been reported, and this paper continuously investigates the effects of the runner casing on the runner work and the platform behavior. Besides, the flows around the Wells type, not only single runner but also tandem runners are investigated numerically. It was confirmed that the runner work attenuates the platform amplitude and the runner casing contributes to increase the output. The flow simulation suggests that the tandem runners may be appropriate for the floating type ocean wave power station to get enough output.

关键词： Renewable energy ocean wave float platform counter-rotation power unit.

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Power Stabilization System with Counter-Rotating Type Pump-Turbine Unit for Renewable Energy

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Journal of Power and Energy Engineering 2014年第4期2卷 47-52页

作者： Toru Miyaji Risa Kasahara Toshiaki Kanemoto Jin-Hyuk Kim Young-Seok Choi toshihiko umekage Graduate School of Engineering Kyushu Institute of Technology Fukuoka Japan Faculty of Engineering Kyushu Institute of Technology Fukuoka Japan Green Energy System Technology Center Korea Institute of Industrial Technology Cheonan Korea

Traditional type pumped storage system contributes to adjust the electric power unbalance between day and night, in general. The pump-turbine unit is prepared for the power stabilization system, in this serial research, to provide the constant power with good quality for the grid system, even at the suddenly fluctuating/turbulent output from renewable energies. In the unit, the angular momentum changes through the front impeller/runner must be the same as that through the rear impeller/runner, that is, the axial flow at the outlet should be the same to the axial flow at the inlet. Such flow conditions are advantageous to work at not only the pumping mode but also the turbine mode. This work discusses experimentally the performance of the unit, and verifies that this type unit is very effective to both operating modes.

关键词： Power Stabilization Pump-Turbine Counter-Rotation Impeller Generator Motor

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