浮体式洋上風車(<特集>海洋エネルギー・資源の最前線)

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Brief overview of technology of a floating wind turbine is reported. A wide range of floating platform designs which include pontoon-type, semisubmersible-type, SPAR-type, tension-leg-type and cruise-type are introduced. The advantage and disadvantage of the designs are discussed from the view points of choice of number of wind turbines installed on a platform, mechanism of stability and motion characteristics. The design criteria of a platform and technological and economical feasibility are introduced. In most of the feasibility studies and the projects, a land-based wind turbine is assumed to be installed on a floating platform to reduce the overall cost. For this reason, smaller allowable limits are required for the motion of a floating wind turbine. For example, five degrees is allowable for a static inclination and one to two degrees is allowable for the amplitude of pitching motion considering inclination and acceleration. It is shown that economies of scale works for floating wind turbines, because size of the floating platform is determined mainly by the requirement for the motion of platform, not by the size and weight of wind turbine installed on the platform. For station keeping, taut mooring using synthetic fiber rope and cruise-type concept are introduced. Finally economy obtained from some of the feasibility studies is introduced. The cost shown by the studies are promising for power generation with a floating wind turbine.
一般社団法人日本エネルギー学会の論文
2009-07-20

浮体式洋上風車(<特集>海洋エネルギー・資源の最前線)

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