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Numerical modelling of wave energy resources and assessment of wave energy extraction by large scale wave farms

机译：波浪能资源的数值模拟及大型波浪场对波浪能提取的评估

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This study reports the practicalities of applying a numerical model to assess the wave energy extraction at proposed development sites in Orkney Waters, Scotland. A state-of-the-art phase averaged spectral wave model, MIKE 21 Spectral Wave, in association with the wave-structure interaction software tool WAMIT, has been employed to study the impact of energy extraction by large arrays of Wave Energy Converters (WECs) on the wave height alteration in the neighbourhood of WEC arrays. Two generic types of WEC, one representing surface attenuators (deployed in deep water) and other representing Oscillating Wave Surge Converters (deployed in shallow waters) are used for numerical modelling. The power extraction performance of the WECs are initially modelled using WAMIT and validated with data from literature. As MIKE 21 SW has limited ability in modelling complete dynamics of a moving structure, each WEC has been modelled as a generic structure but with appropriate reflection, transmission and energy absorption properties derived from WAMIT, and this methodology is found to have worked well. In total there are 198 attenuators and 120 Oscillating Wave Surge Converters are constructed within the numerical model at potential energy locations in Orkney Waters, and the wave-WECs array interactions for the year 2010 have been simulated. The results suggest that the wave farm will have an impact on the wave climate immediately in the lee of the array, although the magnitude of these effects decreases monotonically with distance from the farm. (C) 2017 Elsevier Ltd. All rights reserved.
机译：这项研究报告了应用数值模型评估苏格兰奥克尼水域拟议开发地点的波浪能提取的实用性。最先进的相位平均频谱波模型MIKE 21 Spectral Wave，与波结构交互软件工具WAMIT相结合，已被用于研究大型波能转换器（WEC）的能量提取的影响）关于WEC阵列附近的波高变化。 WEC有两种通用类型，一种代表表面衰减器（部署在深水中），另一种代表振荡浪涌转换器（部署在浅水中）用于数值建模。 WEC的功率提取性能最初是使用WAMIT建模的，并使用文献数据进行了验证。由于MIKE 21 SW对运动结构的完整动力学建模的能力有限，因此每个WEC均已建模为通用结构，但具有从WAMIT派生的适当反射，透射和能量吸收特性，因此该方法非常有效。在奥克尼水域潜在能量位置的数值模型中，总共构建了198个衰减器和120个振荡波电涌转换器，并模拟了2010年的wave-WECs阵列相互作用。结果表明，尽管这些影响的幅度随与农场距离的增加而单调降低，但海浪养殖场将立即对阵列背风处的海浪气候产生影响。 （C）2017 Elsevier Ltd.保留所有权利。

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