A simplified method to estimate tidal current effects on the ocean wave power resource
A simplified method to estimate tidal current effects on the ocean wave power resource
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DOI：
10.1016/j.renene.2016.04.073
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发表时间：
2016-10-01
期刊：
影响因子：
8.7
通讯作者：
Neill, Simon P.
中科院分区：
文献类型：
--
作者：
Hashemi, M. Reza;Grilli, Stephan T.;Neill, Simon P.
虽然海洋波浪能可以显着修改潮流，在波浪能网站的资源评估一般忽略了这种影响，主要是由于开发耦合波浪潮汐模型的困难和高计算成本。此外，由于观测数据的缺乏，验证耦合模式中波流相互作用效应的预测是一项具有挑战性的任务。在这里，作为一种替代完全耦合的数值模型，我们提出了一个简化的分析方法，基于线性波浪理论，来估计潮流的影响，对波浪能资源。该方法估计由此产生的波高和波长的增加（或减少），以对抗（或以下）电流，以及量化波功率的变化。该方法的验证，将其应用到两个充满活力的位置周围的英国大陆架-彭特兰湾和布里斯托通道-波/电流的相互作用是显着的，并提供现场数据。结果表明，简化的分析方法具有良好的精度，因此，它可以作为一个有效的工具，使快速估计潮汐对波力资源的影响。此外，该方法可用于帮助更好地解释数值模式结果以及观测数据。(C)2016爱思唯尔有限公司版权所有
Although ocean wave power can be significantly modified by tidal currents, resource assessments at wave energy sites generally ignore this effect, mainly due to the difficulties and high computational cost of developing coupled wave-tide models. Furthermore, validating the prediction of wave-current interaction effects in a coupled model is a challenging task, due to the paucity of observational data. Here, as an alternative to fully coupled numerical models, we present a simplified analytical method, based on linear wave theory, to estimate the influence of tidal currents on the wave power resource. The method estimates the resulting increase (or decrease) in wave height and wavelength for opposing (or following) currents, as well as quantifying the change in wave power. The method is validated by applying it to two energetic locations around the UK shelf - Pentland Firth and Bristol Channel - where wave/current interactions are significant, and for which field data are available. Results demonstrate a good accuracy of the simplified analytical approach, which can thus be used as an efficient tool for making rapid estimates of tidal effects on the wave power resource. Additionally, the method can be used to help better interpret numerical model results, as well as observational data. (C) 2016 Elsevier Ltd. All rights reserved.