Investigation of new layout design concepts of an array-on-device WaveSub device
Investigation of new layout design concepts of an array-on-device WaveSub device
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DOI：
10.1016/j.renene.2022.03.126
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发表时间：
2022-03
期刊：
影响因子：
8.7
通讯作者：
E. Faraggiana;J. Chapman;A. Williams;C. Whitlam;I. Masters
中科院分区：
文献类型：
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作者：
E. Faraggiana;J. Chapman;A. Williams;C. Whitlam;I. Masters
波浪能转换器（WEC）尚未证明其在主流能源市场的竞争力。该技术的研究和开发对于找到能源生产和降低成本方面的最佳解决方案是必要的。由于共享安装和电网连接成本，与单个设备相比，WEC 农场预计会降低能源平准成本 (LCoE)。研究表明，WEC 阵列的能量产出高度依赖于 WEC 的间距和布局。需要一种选择最佳阵列布局的方法。这里我们展示了具有 6 个浮点的 WaveSub 器件的 4 种不同设计布局之间的比较。选择了六浮点配置，因为如之前的研究所示，LCoE 随着每个设备浮点的增加而降低。针对线性、矩形、三角形和圆形多浮点配置，找到了 LCoE 和额定功率方面的最佳配置。优化的参数包括浮子间距和取力器 (PTO) 刚度、阻尼和额定功率。优化算法采用遗传算法结合克里金代理模型。数值模拟在 WEC-Sim 中在时域中求解，而水动力系数在 Nemoh 中使用线性势流理论计算。对于所有几何配置，最小的浮子间距是最有前途的，因为结构成本较低。事实上，浮体间距对设备产生的功率的影响不如浮体间距对资本成本的影响那么显着。总体而言，圆形配置优于其他配置。这项研究表明，可以通过优化来研究布局配置，并且这可以应用于未来的其他配置和其他 WEC 概念。
Wave Energy Converters (WECs) have not yet proven their competitiveness in the mainstream energy market. Research and development of this technology are necessary to find optimal solutions in terms both of energy produced and reduced cost. A WEC farm is expected to have reduced Levelized Cost of Energy (LCoE) compared to individual devices due to shared installation and grid connection costs. Studies show that energy yield of a WEC array is highly dependent on spacing and layout of the WECs. A method for selecting an optimal array layout is desirable.Here we show a comparison between 4 different design layouts of a WaveSub device with six floats. A six float configuration has been chosen because the LCoE reduces with increasing floats per device as shown in previous research. An optimal configuration in terms of LCoE and rated power is found for linear, rectangle, triangle and circular multi-float configurations. Parameters optimised are float spacing and Power Take Off (PTO) stiffness, damping and rated power. The optimisation algorithm uses a genetic algorithm combined with a Kriging surrogate model. Numerical simulations are solved in the time-domain in WEC-Sim while the hydrodynamic coefficients are calculated in Nemoh using a linear potential flow theory.For all geometric configurations, the smallest float spacing was the most promising because of the lower cost of the structure. In fact, the influence of the float spacing on the power produced by the device is shown to be less significant than the influence of float spacing on the capital cost. Overall, the circular configuration outperformed the other configurations. This study shows that layout configurations can be investigated with optimisation and this could be applied to other configurations and other WEC concepts in future.