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A simplified method to estimate tidal current effects on the ocean wave power resource

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  • Hashemi, M. Reza
  • Grilli, Stéphan T.
  • Neill, Simon P.

Abstract

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.

Suggested Citation

  • Hashemi, M. Reza & Grilli, Stéphan T. & Neill, Simon P., 2016. "A simplified method to estimate tidal current effects on the ocean wave power resource," Renewable Energy, Elsevier, vol. 96(PA), pages 257-269.
    • Handle: RePEc:eee:renene:v:96:y:2016:i:pa:p:257-269
    DOI: 10.1016/j.renene.2016.04.073
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    References listed on IDEAS

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    Cited by:

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    3. Guillou, Nicolas & Chapalain, Georges & Neill, Simon P., 2016. "The influence of waves on the tidal kinetic energy resource at a tidal stream energy site," Applied Energy, Elsevier, vol. 180(C), pages 402-415.
    4. Shi, Xueli & Li, Shaowu & Liang, Bingchen & Zhao, Jianchun & Liu, Ye & Wang, Zhenlu, 2023. "Numerical study on the impact of wave-current interaction on wave energy resource assessments in Zhoushan sea area, China," Renewable Energy, Elsevier, vol. 215(C).
    5. Liang, Bingchen & Shao, Zhuxiao & Wu, Yajie & Shi, Hongda & Liu, Zhen, 2017. "Numerical study to estimate the wave energy under Wave-Current Interaction in the Qingdao coast, China," Renewable Energy, Elsevier, vol. 101(C), pages 845-855.

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