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Analytical Study on an Oscillating Buoy Wave Energy Converter Integrated into a Fixed Box-Type Breakwater

Author

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  • Xuanlie Zhao
  • Dezhi Ning
  • Chongwei Zhang
  • Yingyi Liu
  • Haigui Kang

Abstract

An oscillating buoy wave energy converter (WEC) integrated to an existing box-type breakwater is introduced in this study. The buoy is installed on the existing breakwater and designed to be much smaller than the breakwater in scale, aiming to reduce the construction cost of the WEC. The oscillating buoy works as a heave-type WEC in front of the breakwater towards the incident waves. A power take-off (PTO) system is installed on the topside of the breakwater to harvest the kinetic energy (in heave mode) of the floating buoy. The hydrodynamic performance of this system is studied analytically based on linear potential-flow theory. Effects of the geometrical parameters on the reflection and transmission coefficients and the capture width ratio (CWR) of the system are investigated. Results show that the maximum efficiency of the energy extraction can reach 80% or even higher. Compared with the isolated box-type breakwater, the reflection coefficient can be effectively decreased by using this oscillating buoy WEC, with unchanged transmission coefficient. Thus, the possibility of capturing the wave energy with the oscillating buoy WEC integrated into breakwaters is shown.

Suggested Citation

  • Xuanlie Zhao & Dezhi Ning & Chongwei Zhang & Yingyi Liu & Haigui Kang, 2017. "Analytical Study on an Oscillating Buoy Wave Energy Converter Integrated into a Fixed Box-Type Breakwater," Mathematical Problems in Engineering, Hindawi, vol. 2017, pages 1-9, May.
    • Handle: RePEc:hin:jnlmpe:3960401
    DOI: 10.1155/2017/3960401
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    Cited by:

    1. 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.
    2. Cheng, Yong & Xi, Chen & Dai, Saishuai & Ji, Chunyan & Collu, Maurizio & Li, Mingxin & Yuan, Zhiming & Incecik, Atilla, 2022. "Wave energy extraction and hydroelastic response reduction of modular floating breakwaters as array wave energy converters integrated into a very large floating structure," Applied Energy, Elsevier, vol. 306(PA).
    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. Cheng, Yong & Du, Weiming & Dai, Saishuai & Ji, Chunyan & Collu, Maurizio & Cocard, Margot & Cui, Lin & Yuan, Zhiming & Incecik, Atilla, 2022. "Hydrodynamic characteristics of a hybrid oscillating water column-oscillating buoy wave energy converter integrated into a π-type floating breakwater," Renewable and Sustainable Energy Reviews, Elsevier, vol. 161(C).
    5. Zhou, Binzhen & Zheng, Zhi & Jin, Peng & Wang, Lei & Zang, Jun, 2022. "Wave attenuation and focusing performance of parallel twin parabolic arc floating breakwaters," Energy, Elsevier, vol. 260(C).
    6. Yang, Can & Xu, Tingting & Wan, Chang & Liu, Hengxu & Su, Zuohang & Zhao, Lujun & Chen, Hailong & Johanning, Lars, 2023. "Numerical investigation of a dual cylindrical OWC hybrid system incorporated into a fixed caisson breakwater," Energy, Elsevier, vol. 263(PE).

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