Numerical benchmarking study of a selection of wave energy converters
Numerical benchmarking study of a selection of wave energy converters
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DOI：
10.1016/j.renene.2011.10.002
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发表时间：
2012-05-01
期刊：
影响因子：
8.7
通讯作者：
Krokstad, J.
中科院分区：
文献类型：
--
作者：
Babarit, A.;Hals, J.;Krokstad, J.
本研究的目的是估计八种不同工作原理的波浪能转换器（WECs）的年平均吸收功率。基于这些估计，可以推导出一组与成本相关的电力性能度量。它们是每特征质量（kWh/kg）、每特征表面积（MWh/m(2)）和每起飞力（PTO）均方根（kWh/N）的吸收能量。该方法依赖于数值模拟。对于每个设备，基于运动方程建立了数值波-线（W2W）模型。物理效果是根据流体力学建模实践中最先进的技术来建模的。然后，使用W2W模型计算了每个设备的功率矩阵和欧洲海岸五个不同代表性波点的年平均功率吸收，这些波点的波能资源平均水平在每米波前15至88千瓦之间。对每个装置的不确定性进行了讨论和估计。计算的功率矩阵和平均年功率吸收的结果组装在每个设备的汇总表中。对所选设备的比较表明，尽管工作原理和尺寸非常不同，但功率性能指标的变化远小于平均年功率吸收。对于所选的单位，这些度量都显示为1的数量级。(C) 2011 Elsevier Ltd.版权所有。
The aim of this study is to estimate the mean annual power absorption of a selection of eight Wave Energy Converters (WECs) with different working principles. Based on these estimates a set of power performance measures that can be related to costs are derived. These are the absorbed energy per characteristic mass [kWh/kg], per characteristic surface area [MWh/m(2)], and per root mean square of Power Take Off (PTO) force [kWh/N].The methodology relies on numerical modelling. For each device, a numerical Wave-to-Wire (W2W) model is built based on the equations of motion. Physical effects are modelled according to the state-of-the-art within hydrodynamic modelling practise. Then, the W2W models are used to calculate the power matrices of each device and the mean annual power absorption at five different representative wave sites along the European Coast, at which the mean level of wave power resource ranges between 15 and 88 kW per metre of wave front. Uncertainties are discussed and estimated for each device.Computed power matrices and results for the mean annual power absorption are assembled in a summary sheet per device. Comparisons of the selected devices show that, despite very different working principles and dimensions, power performance measures vary much less than the mean annual power absorption. With the chosen units, these measures are all shown to be of the order of 1. (C) 2011 Elsevier Ltd. All rights reserved.