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Hydrodynamic performance of a novel WEC-breakwater integrated system consisting of triple dual-freedom pontoons

机译：一种由三重双自由浮龙组成的新型WEC防水综合系统的流体动力学性能

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摘要

A breakwater consisting of three pontoon-type wave energy converters equipped with Power Take-Off (PTO) systems to extract wave energy from pitch and heave motions is proposed. The proposed integrated system has the potential to reduce the cost of the wave energy conversion system by sharing the essential infrastructure with the floating breakwater. In the model, the eigenfunction expansion matching method and technique of variables separation are used. The effects of the geometrical parameters (including pontoon width, draft and spacing) on the hydrodynamic performance characterized by the wave energy conversion efficiency, transmission and reflection coefficients are investigated, respectively. It is found that the effective bandwidth (transmission coefficient K_T ＜ 0.5 and hydrodynamic efficiency C_w ＞ 0.3) and the peak efficiency are enhanced when the pitch and heave motions are considered simultaneously, compared with the single DoF motion system. The effective bandwidth increases with the decrease of width and draft of the front pontoon. And the variation of pontoon spacing affects significantly the distribution of the efficiency due to the Bragg-type reflection. Additionally, it is found that the variation of the geometrical parameters of the front pontoon on wave transmission is limited by changing the geometrical parameters of the front pontoon only.
机译：提出了一种浮桥，其三个浮桥型波能量转换器配备有电力起飞（PTO）系统，以从间距和升降动作中提取波能。所提出的集成系统具有通过与浮动防波堤共享基本基础设施来降低波能转换系统的成本。在模型中，使用了特征函数扩展匹配方法和变量分离技术。分别研究了几何参数（包括浮桥宽度，牵伸和间距）对具有波能转换效率，传输和反射系数的流体动力性能的影响。结果发现，当同时考虑间距和升降运动时，有效带宽（透射系数K_T <0.5和流体动力学效率C_W> 0.3）和峰值效率。随着前浮桥的宽度和牵引力的减小，有效带宽增加。浮桥间距的变化显着影响了由于布拉格型反射引起的效率的分布。另外，发现通过改变前浮孔的几何参数，对波传输的前浮筒的几何参数的变化仅受到限制。

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  • 来源
    《Energy》 |2020年第15期|118463.1-118463.14|共14页
  • 作者

    Baoming Guo; Rongquan Wang; Dezhi Ning; Lifen Chen; Wojciech Sulisz;

  • 作者单位

    State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian 116024 China;

    State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian 116024 China;

    State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian 116024 China;

    State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian 116024 China;

    Institute of Hydro-Engineering Polish Academy of Sciences Koscierska 7 80328 Gdansk Poland;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    WEC; Wave energy; Integrated system; Dual degree-of-freedom; Hydrodynamic performance;

    机译：WEC;波能量;集成系统;双重自由度;流体动力学性能;

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