傾斜形波動ポンプの性能向上に関する研究 : 第1報, 傾斜形ダブルアクティング波動ポンプのフロートおよび波高変換装置の性能に及ぼす影響

概要

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A newly developed, inclined double-acting wave energy pump which can be designed effectively to inclined beach bottoms and the variation of wave periods has been experimentally investigated. In order to improve the pump performance the reciprocating moving parts, a pair of float-pistons have to be tuned with wave periods and take advantage of horizontal forces of the waves, which provides an idea of variable geometry. The pump, with variable axis angle, is operated in double-action mode in which water is pressurized by both up and down motions of the float-pistons. Model test pumps with rectangular and cylindrical floats were tested to determine the effect of the pump axis angle (θ), wave period (T_w) and some kinds of horizontal wave energy converters with an inclined plate. It is shown in this paper that an optimum pump axis angle exists in terms of the pump performance, and the combination of the cylindrical type float with the inclined wave energy converter results in increased pump efficiency on a large scale.
1997-04-25