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Performance optimization of a coaxial-cylinder wave energy converter

Author

Listed:
  • Jin, Peng
  • Zhou, Binzhen
  • Göteman, Malin
  • Chen, Zhongfei
  • Zhang, Liang

Abstract

To achieve a wider frequency range where the device has a larger capture width ratio, the performance of a heaving coaxial-cylinder wave energy converter is optimized through actively controlled generator damping and stiffness using a linear frequency domain model. The generator power take-off system is modeled as a damping-spring system, and the numerical model is validated against published results. The coupled dynamics of a two-body model is analyzed to search for the optimal generator damping and stiffness leading to maximal capture width ratio. The optimization process, which can be decoupled into two independent steps, leads to an improved performance of the device, with increased frequency bandwidth and better capture width ratio. The effects of water depth, mooring stiffness, and the dimensions of the WEC on the capture width ratio are also studied, and parameter values are identified which correspond to optimal performance of the device.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:energy:v:174:y:2019:i:c:p:450-459
    DOI: 10.1016/j.energy.2019.02.189
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    References listed on IDEAS

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    1. Son, Daewoong & Belissen, Valentin & Yeung, Ronald W., 2016. "Performance validation and optimization of a dual coaxial-cylinder ocean-wave energy extractor," Renewable Energy, Elsevier, vol. 92(C), pages 192-201.
    2. 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.
    3. Son, Daewoong & Yeung, Ronald W., 2017. "Optimizing ocean-wave energy extraction of a dual coaxial-cylinder WEC using nonlinear model predictive control," Applied Energy, Elsevier, vol. 187(C), pages 746-757.
    4. Ning, Dezhi & Zhao, Xuanlie & Göteman, Malin & Kang, Haigui, 2016. "Hydrodynamic performance of a pile-restrained WEC-type floating breakwater: An experimental study," Renewable Energy, Elsevier, vol. 95(C), pages 531-541.
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    Cited by:

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    2. Wang, LiGuo & Lin, MaoFeng & Tedeschi, Elisabetta & Engström, Jens & Isberg, Jan, 2020. "Improving electric power generation of a standalone wave energy converter via optimal electric load control," Energy, Elsevier, vol. 211(C).
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    6. Aleix Maria-Arenas & Aitor J. Garrido & Eugen Rusu & Izaskun Garrido, 2019. "Control Strategies Applied to Wave Energy Converters: State of the Art," Energies, MDPI, vol. 12(16), pages 1-19, August.
    7. Zhou, Binzhen & Hu, Jianjian & Wang, Yu & Jin, Peng & Jing, Fengmei & Ning, Dezhi, 2023. "Coupled dynamic and power generation characteristics of a hybrid system consisting of a semi-submersible wind turbine and an array of heaving wave energy converters," Renewable Energy, Elsevier, vol. 214(C), pages 23-38.
    8. Zhou, Binzhen & Zheng, Zhi & Zhang, Qi & Jin, Peng & Wang, Lei & Ning, Dezhi, 2023. "Wave attenuation and amplification by an abreast pair of floating parabolic breakwaters," Energy, Elsevier, vol. 271(C).
    9. Berenjkoob, Mahdi Nazari & Ghiasi, Mahmoud & Soares, C.Guedes, 2021. "Influence of the shape of a buoy on the efficiency of its dual-motion wave energy conversion," Energy, Elsevier, vol. 214(C).
    10. 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.
    11. Zhou, Binzhen & Hu, Jianjian & Jin, Peng & Sun, Ke & Li, Ye & Ning, Dezhi, 2023. "Power performance and motion response of a floating wind platform and multiple heaving wave energy converters hybrid system," Energy, Elsevier, vol. 265(C).
    12. Zhou, Binzhen & Zheng, Zhi & Jin, Peng & Wang, Lei & Zang, Jun, 2022. "Wave attenuation and focusing performance of parallel twin parabolic arc floating breakwaters," Energy, Elsevier, vol. 260(C).

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