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Wave energy absorption of a wave farm with an array of buoys and flexible runway

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  • Zhang, H.C.
  • Xu, D.L.
  • Liu, C.R.
  • Wu, Y.S.

Abstract

A novel wave energy extraction method, based on the PTO (Power Take-Off) mechanism, is developed by utilizing an array of buoys connected with a flexible runway. Hydrodynamic interactions among the buoys are analyzed using an exact algebraic method based on linear wave theory in the frequency domain. A parametric governing equation of compounded wave energy converter referred to as a wave farm is formulated by using Hamilton's principle which can be discretized by using Galerkin method. The effects of wave condition and the parameters of PTO on the wave energy absorption and displacement of runway are analyzed. The results show that the energy extraction and displacement of the runway can reach an optimal balance by optimizing the stiffness of connectors and damping coefficient of PTO which leads to the benefits of more efficient energy absorption and less movement of the runway simultaneously. The quality of the wave farm is examined by introducing the q-factor to understand the effect of the array configuration. This research work is aimed to provide a theoretical guideline for wave energy converter design.

Suggested Citation

  • Zhang, H.C. & Xu, D.L. & Liu, C.R. & Wu, Y.S., 2016. "Wave energy absorption of a wave farm with an array of buoys and flexible runway," Energy, Elsevier, vol. 109(C), pages 211-223.
    • Handle: RePEc:eee:energy:v:109:y:2016:i:c:p:211-223
    DOI: 10.1016/j.energy.2016.04.107
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    Cited by:

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    2. Wang, Yu-Jen & Lee, Chih-Kuang, 2019. "Dynamics and power generation of wave energy converters mimicking biaxial hula-hoop motion for mooring-less buoys," Energy, Elsevier, vol. 183(C), pages 547-560.
    3. Hai-Cheng Zhang & Dao-Lin Xu & Chun-Rong Liu & You-Sheng Wu, 2017. "A Floating Platform with Embedded Wave Energy Harvesting Arrays in Regular and Irregular Seas," Energies, MDPI, vol. 10(9), pages 1-17, September.
    4. Zhao, Huai & Zhang, Haicheng & Bi, Rengui & Xi, Ru & Xu, Daolin & Shi, Qijia & Wu, Bo, 2020. "Enhancing efficiency of a point absorber bistable wave energy converter under low wave excitations," Energy, Elsevier, vol. 212(C).
    5. Jahangir, Mohammad Hossein & Hosseini, Seyed Sina & Mehrpooya, Mehdi, 2018. "A detailed theoretical modeling and parametric investigation of potential power in heaving buoys," Energy, Elsevier, vol. 154(C), pages 201-209.
    6. Zhang, Haicheng & Xu, Daolin & Ding, Rui & Zhao, Huai & Lu, Ye & Wu, Yousheng, 2019. "Embedded Power Take-Off in hinged modularized floating platform for wave energy harvesting and pitch motion suppression," Renewable Energy, Elsevier, vol. 138(C), pages 1176-1188.
    7. Zhang, Haicheng & Xi, Ru & Xu, Daolin & Wang, Kai & Shi, Qijia & Zhao, Huai & Wu, Bo, 2019. "Efficiency enhancement of a point wave energy converter with a magnetic bistable mechanism," Energy, Elsevier, vol. 181(C), pages 1152-1165.
    8. Zhang, Haicheng & Xu, Daolin & Zhao, Huai & Xia, Shuyan & Wu, Yousheng, 2018. "Energy extraction of wave energy converters embedded in a very large modularized floating platform," Energy, Elsevier, vol. 158(C), pages 317-329.
    9. Jin, Huaqing & Zhang, Haicheng & Xu, Daolin & Jun, Ding & Ze, Sun, 2022. "Low-frequency energy capture and water wave attenuation of a hybrid WEC-breakwater with nonlinear stiffness," Renewable Energy, Elsevier, vol. 196(C), pages 1029-1047.

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