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Experimental and numerical study on a novel dual-resonance wave energy converter with a built-in power take-off system

Author

Listed:
  • Chen, Zhongfei
  • Zhou, Binzhen
  • Zhang, Liang
  • Li, Can
  • Zang, Jun
  • Zheng, Xiongbo
  • Xu, Jianan
  • Zhang, Wanchao

Abstract

A new concept of point-absorber wave energy converter (WEC) with a waterproof outer-floater and a built-in power take-off (BI-PTO) mechanism, named Dual-Resonance WEC (DR-WEC), is put forward and investigated by experiments and numerical simulations. The BI-PTO mechanism includes spring, sliding-mass and damping systems, where the spring system is the most complicated and should be designed specially. A 1:10 scale model is designed. The mechanical performance of the BI-PTO system is investigated by a bench test. The results have shown that the design is feasible, and the added inertia effect of the BI-PTO has a negative influence on the power output. The average mechanical efficiency of the BI-PTO is 65.8% with maximum up to 80.0%. The motion and power responses of the DR-WEC are studied by a wave tank experiment and a linear numerical model with corrected mechanical added mass and viscosity. The viscous added mass and damping correction coefficients are obtained by a free decay test. The good agreement between the experimental measurements and numerical simulations has indicated that the present numerical model with corrections is of enough accuracy and the effects of mooring system and other degree of freedoms on the heave motion and power responses can be ignored.

Suggested Citation

  • Chen, Zhongfei & Zhou, Binzhen & Zhang, Liang & Li, Can & Zang, Jun & Zheng, Xiongbo & Xu, Jianan & Zhang, Wanchao, 2018. "Experimental and numerical study on a novel dual-resonance wave energy converter with a built-in power take-off system," Energy, Elsevier, vol. 165(PA), pages 1008-1020.
    • Handle: RePEc:eee:energy:v:165:y:2018:i:pa:p:1008-1020
    DOI: 10.1016/j.energy.2018.09.094
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    1. Rodríguez, Claudio A. & Rosa-Santos, Paulo & Taveira-Pinto, Francisco, 2019. "Assessment of damping coefficients of power take-off systems of wave energy converters: A hybrid approach," Energy, Elsevier, vol. 169(C), pages 1022-1038.
    2. Wang, Daming & Jin, Siya & Hann, Martyn & Conley, Daniel & Collins, Keri & Greaves, Deborah, 2023. "Power output estimation of a two-body hinged raft wave energy converter using HF radar measured representative sea states at Wave Hub in the UK," Renewable Energy, Elsevier, vol. 202(C), pages 103-115.
    3. Xuhui, Yue & Qijuan, Chen & Zenghui, Wang & Dazhou, Geng & Donglin, Yan & Wen, Jiang & Weiyu, Wang, 2019. "A novel nonlinear state space model for the hydraulic power take-off of a wave energy converter," Energy, Elsevier, vol. 180(C), pages 465-479.
    4. Hu, Jianjian & Zhou, Binzhen & Vogel, Christopher & Liu, Pin & Willden, Richard & Sun, Ke & Zang, Jun & Geng, Jing & Jin, Peng & Cui, Lin & Jiang, Bo & Collu, Maurizio, 2020. "Optimal design and performance analysis of a hybrid system combing a floating wind platform and wave energy converters," Applied Energy, Elsevier, vol. 269(C).
    5. Ning, De-zhi & Mu, Di & Wang, Rong-quan & Mayon, Robert, 2023. "Experimental and numerical investigations on the solitary wave actions on a land-fixed OWC wave energy converter," Energy, Elsevier, vol. 282(C).

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