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Performance estimation of resonance-enhanced dual-buoy wave energy converter using coupled time-domain simulation

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  • Jin, Chungkuk
  • Kang, HeonYong
  • Kim, MooHyun
  • Cho, Ilhyoung

Abstract

This paper presents the modeling methodology and performance evaluation of the resonance-enhanced dual-buoy WEC (Wave Energy Converter) by HEM (hydrodynamic & electro-magnetic) fully-coupled-dynamics time-domain-simulation program. The numerical results are systematically compared with the authors’ 1/6-scale experiment. With a direct-drive linear generator, the WEC consists of dual floating cylinders and a moon-pool between the cylinders, which can utilize three resonance phenomena from moon-pool dynamics as well as heave motions of inner and outer buoys. The contact and friction between the two buoys observed in the experiment are also properly modeled in the time-domain simulation by the Coulomb-friction model. Moon-pool resonance peaks significantly exaggerated in linear potential theory are empirically adjusted through comparisons with measured values. A systematic comparative study between the simulations and experiments with and without PTO (power-take-off) is conducted, and the relative heave displacements/velocities and power outputs are well matched. Then, parametric studies are carried out with the simulation program to determine optimum generator parameters. The performance with various wave conditions is also assessed.

Suggested Citation

  • Jin, Chungkuk & Kang, HeonYong & Kim, MooHyun & Cho, Ilhyoung, 2020. "Performance estimation of resonance-enhanced dual-buoy wave energy converter using coupled time-domain simulation," Renewable Energy, Elsevier, vol. 160(C), pages 1445-1457.
    • Handle: RePEc:eee:renene:v:160:y:2020:i:c:p:1445-1457
    DOI: 10.1016/j.renene.2020.07.075
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    References listed on IDEAS

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    1. Gao, Yuping & Shao, Shuangquan & Zou, Huiming & Tang, Mingsheng & Xu, Hongbo & Tian, Changqing, 2016. "A fully floating system for a wave energy converter with direct-driven linear generator," Energy, Elsevier, vol. 95(C), pages 99-109.
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    Cited by:

    1. Xiao, Han & Wang, Xu, 2024. "Sensitivity analysis of design parameters and their interactions and performance prediction of a novel twin turbine wave energy converter," Energy, Elsevier, vol. 293(C).
    2. Roy, Sanjoy, 2023. "Short duration performance of floating heave buoy WEC in the Lakshadweep Sea," Renewable Energy, Elsevier, vol. 202(C), pages 1148-1159.
    3. Tay, Zhi Yung, 2022. "Energy generation enhancement of arrays of point absorber wave energy converters via Moonpool's resonance effect," Renewable Energy, Elsevier, vol. 188(C), pages 830-848.
    4. Senthil Kumar Natarajan & Ilhyoung Cho, 2023. "New Strategy on Power Absorption of a Concentric Two-Body Wave Energy Converter," Energies, MDPI, vol. 16(9), pages 1-20, April.
    5. Li, Demin & Dong, Xiaochen & Borthwick, Alistair G.L. & Sharma, Sanjay & Wang, Tianyuan & Huang, Heao & Shi, Hongda, 2024. "Two-buoy and single-buoy floating wave energy converters: A numerical comparison," Energy, Elsevier, vol. 296(C).

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