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On the dynamics and design of a two-body wave energy converter

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  • Liang, Changwei
  • Zuo, Lei

Abstract

A two-body wave energy converter oscillating in heave is studied in this paper. The energy is extracted through the relative motion between the floating and submerged bodies. A linearized model in the frequency domain is adopted to study the dynamics of such a two-body system with consideration of both the linear viscous damping and the hydrodynamic damping. The closed form solution of the maximum absorption power and corresponding power takeoff parameters are obtained. The suboptimal and optimal designs for a two-body system are proposed based on the closed form solution. The physical insight of the optimal design is to have one of the damped natural frequencies of the two body system the same as, or as close as possible to, the excitation frequency. A case study is conducted to investigate the influence of the submerged body on the absorption power of a two-body system subjected to suboptimal and optimal design under regular and irregular wave excitations. It is found that the absorption power of the two-body system can be significantly higher than that of the single body system with the same floating buoy in both regular and irregular waves. In regular waves, it is found that the mass of the submerged body should be designed with an optimal value in order to achieve the maximum absorption power for a given floating buoy in the presence of viscous damping. The viscous damping on the submerged body should be as small as possible for a given mass in both regular and irregular waves.

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  • Liang, Changwei & Zuo, Lei, 2017. "On the dynamics and design of a two-body wave energy converter," Renewable Energy, Elsevier, vol. 101(C), pages 265-274.
    • Handle: RePEc:eee:renene:v:101:y:2017:i:c:p:265-274
    DOI: 10.1016/j.renene.2016.08.059
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    1. Henriques, J.C.C. & Lopes, M.F.P. & Gomes, R.P.F. & Gato, L.M.C. & Falcão, A.F.O., 2012. "On the annual wave energy absorption by two-body heaving WECs with latching control," Renewable Energy, Elsevier, vol. 45(C), pages 31-40.
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    Cited by:

    1. Ji, Xueyu & Shami, Elie Al & Monty, Jason & Wang, Xu, 2020. "Modelling of linear and non-linear two-body wave energy converters under regular and irregular wave conditions," Renewable Energy, Elsevier, vol. 147(P1), pages 487-501.
    2. Chongfei Sun & Zirong Luo & Jianzhong Shang & Zhongyue Lu & Yiming Zhu & Guoheng Wu, 2018. "Design and Numerical Analysis of a Novel Counter-Rotating Self-Adaptable Wave Energy Converter Based on CFD Technology," Energies, MDPI, vol. 11(4), pages 1-21, March.
    3. Al Shami, Elie & Wang, Zhun & Wang, Xu, 2021. "Non-linear dynamic simulations of two-body wave energy converters via identification of viscous drag coefficients of different shapes of the submerged body based on numerical wave tank CFD simulation," Renewable Energy, Elsevier, vol. 179(C), pages 983-997.
    4. Ma, Yong & Zhang, Aiming & Yang, Lele & Li, Hao & Zhai, Zhenfeng & Zhou, Heng, 2020. "Motion simulation and performance analysis of two-body floating point absorber wave energy converter," Renewable Energy, Elsevier, vol. 157(C), pages 353-367.
    5. Harms, Julius & Hollm, Marten & Dostal, Leo & Kern, Thorsten A. & Seifried, Robert, 2022. "Design and optimization of a wave energy converter for drifting sensor platforms in realistic ocean waves," Applied Energy, Elsevier, vol. 321(C).
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    7. Fankai Kong & Hengxu Liu & Weiming Su & Jingtao Ao & Hailong Chen & Fengmei Jing, 2019. "Analytical and Numerical Analysis of the Dynamics of a Moonpool Platform–Wave Energy Buoy (MP–WEB)," Energies, MDPI, vol. 12(21), pages 1-24, October.
    8. Li, Xiaofan & Liang, Changwei & Chen, Chien-An & Xiong, Qiuchi & Parker, Robert G. & Zuo, Lei, 2020. "Optimum power analysis of a self-reactive wave energy point absorber with mechanically-driven power take-offs," Energy, Elsevier, vol. 195(C).
    9. Jin, Peng & Zhou, Binzhen & Göteman, Malin & Chen, Zhongfei & Zhang, Liang, 2019. "Performance optimization of a coaxial-cylinder wave energy converter," Energy, Elsevier, vol. 174(C), pages 450-459.
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    12. Al Shami, Elie & Wang, Xu & Zhang, Ran & Zuo, Lei, 2019. "A parameter study and optimization of two body wave energy converters," Renewable Energy, Elsevier, vol. 131(C), pages 1-13.
    13. Piscopo, V. & Benassai, G. & Della Morte, R. & Scamardella, A., 2020. "Towards a unified formulation of time and frequency-domain models for point absorbers with single and double-body configuration," Renewable Energy, Elsevier, vol. 147(P1), pages 1525-1539.
    14. Li, Xiaofan & Martin, Dillon & Liang, Changwei & Chen, ChienAn & Parker, Robert G. & Zuo, Lei, 2021. "Characterization and verification of a two-body wave energy converter with a novel power take-off," Renewable Energy, Elsevier, vol. 163(C), pages 910-920.
    15. Rahimi, Amir & Rezaei, Saeed & Parvizian, Jamshid & Mansourzadeh, Shahriar & Lund, Jorrid & Hssini, Radhouane & Düster, Alexander, 2022. "Numerical and experimental study of the hydrodynamic coefficients and power absorption of a two-body point absorber wave energy converter," Renewable Energy, Elsevier, vol. 201(P1), pages 181-193.
    16. Chen, Shuo & Jiang, Boxi & Li, Xiaofan & Huang, Jianuo & Wu, Xian & Xiong, Qiuchi & Parker, Robert G. & Zuo, Lei, 2022. "Design, dynamic modeling and wave basin verification of a Hybrid Wave–Current Energy Converter," Applied Energy, Elsevier, vol. 321(C).
    17. Cai, Qinlin & Zhu, Songye, 2021. "Applying double-mass pendulum oscillator with tunable ultra-low frequency in wave energy converters," Applied Energy, Elsevier, vol. 298(C).
    18. Derong, Duan & Fei, Chen & Hui, Zhang & Xuefeng, Yang & Fang, Zhao, 2020. "Study on capture power of the sealed-buoy wave energy converter in low energy flow density area," Renewable Energy, Elsevier, vol. 152(C), pages 1024-1034.
    19. Bonovas, Markos I. & Anagnostopoulos, Ioannis S., 2020. "Modelling of operation and optimum design of a wave power take-off system with energy storage," Renewable Energy, Elsevier, vol. 147(P1), pages 502-514.
    20. Han, Meng & Cao, Feifei & Shi, Hongda & Zhu, Kai & Dong, Xiaochen & Li, Demin, 2023. "Layout optimisation of the two-body heaving wave energy converter array," Renewable Energy, Elsevier, vol. 205(C), pages 410-431.
    21. Hua Liu & Weijun Wang & Shuai Tang & Longbo Mao & Hongju Mi & Guoping Zhang & Jun Liu, 2019. "Reliability Assessment of Water Hydraulic-Drive Wave-Energy Converters," Energies, MDPI, vol. 12(21), pages 1-21, November.
    22. Elie Al Shami & Ran Zhang & Xu Wang, 2018. "Point Absorber Wave Energy Harvesters: A Review of Recent Developments," Energies, MDPI, vol. 12(1), pages 1-36, December.
    23. Jinming Wu & Zhonghua Ni, 2020. "On the Design of an Integrated System for Wave Energy Conversion Purpose with the Reaction Mass on Board," Sustainability, MDPI, vol. 12(7), pages 1-16, April.
    24. Chen, Weixing & Wu, Zheng & Liu, Jimu & Jin, Zhenlin & Zhang, Xiantao & Gao, Feng, 2021. "Efficiency analysis of a 3-DOF wave energy converter (SJTU-WEC) based on modeling, simulation and experiment," Energy, Elsevier, vol. 220(C).

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