Optimal design and performance analysis of a hybrid system combing a floating wind platform and wave energy converters
Optimal design and performance analysis of a hybrid system combing a floating wind platform and wave energy converters
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DOI：
10.1016/j.apenergy.2020.114998
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发表时间：
2020-05
期刊：
影响因子：
11.2
通讯作者：
Jian-jian Hu;Binzhen Zhou;C. Vogel;Pin Liu;R. Willden;K. Sun;J. Zang;Jing Geng;P. Jin
中科院分区：
文献类型：
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作者：
Jian-jian Hu;Binzhen Zhou;C. Vogel;Pin Liu;R. Willden;K. Sun;J. Zang;Jing Geng;P. Jin
浮式海上风电平台和波浪能转换器(WEC)组合系统具有为海上电力供应和平台保护提供经济高效的解决方案的潜力。本文的目标是在给定的海况下，通过数值研究来优化混合系统中WEC的大小和布局。建立了基于势流理论和粘性修正的频域数值模型，用于研究由浮式平台和多个垂荡WEC组成的混合系统的水动力性能。提出了一种无量纲方法来确定圆柱形WEC在典型波浪频率下的半径、吃水和布局等一系列变量作为初始设计。在相同的海况下，与直径与吃水比较小的WEC相比，直径与吃水比较大的WEC产生的粘性效应相对较小，可获得更大的波功率、更大的有效频率范围和相近的单位重量波功率。WECs的加入降低了平台上的最大水平力和俯仰力矩，而最大垂直力则由于功率输出力的增加而增加，特别是在低频下。本文的研究结果为WECs的优化设计提供了指导，并表明了浮式平台风浪能利用之间的协同潜力。
Combined floating offshore wind platform and Wave Energy Converters (WECs) systems have the potential to provide a cost-effective solution to offshore power supply and platform protection. The objective of this paper is to optimize the size and layout of WECs within the hybrid system under a given sea state with a numerical study. The numerical model was developed based on potential flow theory with viscous correction in frequency domain to investigate the hydrodynamic performance of a hybrid system consisting of a floating platform and multiple heaving WECs. A non-dimensional method was presented to determine a series of variables, including radius, draft, and layout of the cylindrical WEC at a typical wave frequency as the initial design. WECs with larger diameter to draft ratio were found to experience relatively smaller viscous effects, and achieve more wave power, larger effective frequency range and similar wave power per unit weight compared with those with the smaller diameter to draft ratio in the same sea state. The addition of WECs reduced the maximum horizontal force and pitch moment on the platform, whereas the maximum vertical force increased due to the increasing power take-off force, especially at low frequencies. The results presented in this paper provide guidance for the optimized design of WECs and indicate the potential for synergies between wave and wind energy utilization on floating platforms.