Studies on small-sized efficient rotating machine for tidal power generation

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Tidal and ocean current power generation effectively enable us to supply a kind of renewable energy with relatively small turbine diameter in compared to wind turbine thanks to sea water density which is more than 800 times of that for atmosphere. In the present study, one focuses on tidal and ocean power system together with the viewpoints on ocean, ship/port, railway/bridge, electronics and machinery, and energy materials. Then, operation tests are designed for coastal, islands and inland sea to obtain a suitable energy recovery system. A small-sized demonstrator, which is composed of a vital part of novel, compact and efficient rotating machine concepts, was designed and assembled together.