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Hydrodynamic performance of a Comb-Type Breakwater-WEC system: An analytical study

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  • Zhao, Xuanlie
  • Zhang, Yang
  • Li, Mingwei
  • Johanning, Lars

Abstract

A breakwater-WEC system combining heaving body Wave Energy Converters (WEC) and Comb-Type Breakwater (CTB) was investigated. The traditional CTB consists of a distributed array of separated bottom-mounted caissons and wave chambers are located between two caissons. Heaving bodies provide the power take off (PTO) principles that are arranged at the wave chamber of the CTB. The interaction of the CTB and WEC was investigated based on the linear potential flow theory. An analytical model has been developed to examine the hydrodynamic performance of CTB-WEC system. The analytical model is validated with results from an experimental study. Results show that an increase in conversion efficiency is observed when the device is located in the aft end of the wave chamber. A high efficiency (i.e., 77.4%) and qualified wave attenuation performance of the integrated system are achieved for the proposed CTB-WEC system. The wave resonance along the incident wave direction in the wave chamber is beneficial for wave energy capturing. Furthermore, it was found that the critical value kc corresponds to the wave resonance, perpendicular to the incident wave direction, out of the wave chamber. The property of efficiency mitigation at regions of k > kc should be avoided while designing such a system.

Suggested Citation

  • Zhao, Xuanlie & Zhang, Yang & Li, Mingwei & Johanning, Lars, 2020. "Hydrodynamic performance of a Comb-Type Breakwater-WEC system: An analytical study," Renewable Energy, Elsevier, vol. 159(C), pages 33-49.
    • Handle: RePEc:eee:renene:v:159:y:2020:i:c:p:33-49
    DOI: 10.1016/j.renene.2020.05.100
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    Cited by:

    1. Wang, Yuhan & Wang, Dongxu & Dong, Sheng, 2022. "A theoretical model for an integrated wave energy extraction system consisting of a heaving buoy and a perforated wall," Renewable Energy, Elsevier, vol. 189(C), pages 1086-1101.
    2. Zhang, Yang & Zhao, Xuanlie & Geng, Jing & Göteman, Malin & Tao, Longbin, 2022. "Wave power extraction and coastal protection by a periodic array of oscillating buoys embedded in a breakwater," Renewable Energy, Elsevier, vol. 190(C), pages 434-456.
    3. Zhao, Xuanlie & Zhang, Yang & Li, Mingwei & Johanning, Lars, 2021. "Experimental and analytical investigation on hydrodynamic performance of the comb-type breakwater-wave energy converter system with a flange," Renewable Energy, Elsevier, vol. 172(C), pages 392-407.
    4. Huang, Shijie & Huang, Zhenhua, 2022. "Hydrodynamic performance of a row of closely-spaced bottom-sitting oscillating water columns," Renewable Energy, Elsevier, vol. 195(C), pages 344-356.
    5. Zhou, Yu & Chen, Lifen & Zhao, Jie & Liu, Xiangjian & Ye, Xiaorong & Wang, Fei & Adcock, Thomas A.A. & Ning, Dezhi, 2023. "Power and dynamic performance of a floating multi-functional platform: An experimental study," Energy, Elsevier, vol. 285(C).
    6. Zhou, Binzhen & Zheng, Zhi & Zhang, Qi & Jin, Peng & Wang, Lei & Ning, Dezhi, 2023. "Wave attenuation and amplification by an abreast pair of floating parabolic breakwaters," Energy, Elsevier, vol. 271(C).

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