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Performance analysis of a raft-type wave energy converter with a torsion bi-stable mechanism

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  • Shi, Qijia
  • Xu, Daolin
  • Zhang, Haicheng

Abstract

In this study, a torsion bi-stable mechanism is proposed to enhance the absorption efficiency of the raft-type wave energy converter (WEC). The torsion bi-stable mechanism and a power take-off (PTO) system are settled at the joint between hinged rafts. The dynamic model in the time domain of the raft-type WEC has been established in conjunction with a simplified model of the bi-stable mechanism. In order to analyze the performance of the whole system more rapidly, the convolution integral term of the dynamic model has been replaced by the state space model. The performances of the WECs are analyzed in both regular and irregular sea conditions. Compared with the corresponding linear model, the numerical results indicate that the bi-stable mechanism can enhance the capture efficiency of the raft-type WEC significantly and extend the range of the high efficiency to the lower frequencies.

Suggested Citation

  • Shi, Qijia & Xu, Daolin & Zhang, Haicheng, 2021. "Performance analysis of a raft-type wave energy converter with a torsion bi-stable mechanism," Energy, Elsevier, vol. 227(C).
  • Handle: RePEc:eee:energy:v:227:y:2021:i:c:s036054422100637x
    DOI: 10.1016/j.energy.2021.120388
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    References listed on IDEAS

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    1. Zhang, Xiantao & Tian, Xinliang & Xiao, Longfei & Li, Xin & Chen, Lifen, 2018. "Application of an adaptive bistable power capture mechanism to a point absorber wave energy converter," Applied Energy, Elsevier, vol. 228(C), pages 450-467.
    2. 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.
    3. Valeriia Denisova & Alexey Mikhaylov & Evgeny Lopatin, 2019. "Blockchain Infrastructure and Growth of Global Power Consumption," International Journal of Energy Economics and Policy, Econjournals, vol. 9(4), pages 22-29.
    4. 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.
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    Cited by:

    1. Gong, Haoxiang & Cao, Feifei & Han, Zhi & Liu, Shangze & Shi, Hongda, 2022. "Study on the wave energy capture spectrum based on wave height take-off," Energy, Elsevier, vol. 250(C).
    2. 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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