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Influence of the shape of a buoy on the efficiency of its dual-motion wave energy conversion

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  • Berenjkoob, Mahdi Nazari
  • Ghiasi, Mahmoud
  • Soares, C.Guedes

Abstract

A procedure is proposed for the geometric design of the buoy of a single-body wave energy converter (WEC) based on the characteristics of incident waves. The effect of the buoy shape on its hydrodynamic performance and the absorption efficiency of WEC model is considered. The model absorbs the wave energy through the dual motion (heave and surge) of the buoy. In order to compare the dynamics of various buoys in waves, a set of requirements is proposed to create identical conditions. Three groups of buoy geometry, including conical, spherical and unusual geometry are considered. The changes in the hydrodynamic parameters of the buoy due to the buoy shape variations are studied to clarify the effect of these changes on the efficiency of the WEC model. The obtained results show that increasing a ratio of hydrodynamic coefficients of the buoy, increases the produced power regardless of the wave frequency. Also, an appropriate shape for the buoy can raise the WEC model performance from suboptimal mode to optimal mode and would also lead to a significant increase in the absorbed power and efficiency.

Suggested Citation

  • Berenjkoob, Mahdi Nazari & Ghiasi, Mahmoud & Soares, C.Guedes, 2021. "Influence of the shape of a buoy on the efficiency of its dual-motion wave energy conversion," Energy, Elsevier, vol. 214(C).
    • Handle: RePEc:eee:energy:v:214:y:2021:i:c:s0360544220321058
    DOI: 10.1016/j.energy.2020.118998
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    References listed on IDEAS

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    Cited by:

    1. He, Zechen & Ning, Dezhi & Gou, Ying & Zhou, Zhimin, 2022. "Wave energy converter optimization based on differential evolution algorithm," Energy, Elsevier, vol. 246(C).
    2. Tiesheng Liu & Yanjun Liu & Shuting Huang & Gang Xue, 2022. "Shape Optimization of Oscillating Buoy Wave Energy Converter Based on the Mean Annual Power Prediction Model," Energies, MDPI, vol. 15(20), pages 1-19, October.
    3. Yu, Tongshun & Chen, Xingyu & Tang, Yuying & Wang, Junrong & Wang, Yuqiao & Huang, Shuting, 2023. "Numerical modelling of wave run-up heights and loads on multi-degree-of-freedom buoy wave energy converters," Applied Energy, Elsevier, vol. 344(C).
    4. Zhang, Yongxing & Huang, Zhicong & Zou, Bowei & Bian, Jing, 2023. "Conceptual design and analysis for a novel parallel configuration-type wave energy converter," Renewable Energy, Elsevier, vol. 208(C), pages 627-644.
    5. Kamarlouei, Mojtaba & Gaspar, J.F. & Guedes Soares, C., 2022. "Optimal design of an axisymmetric two-body wave energy converter with translational hydraulic power take-off system," Renewable Energy, Elsevier, vol. 183(C), pages 586-600.

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