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Efficiency and survivability analysis of a point-absorber wave energy converter using DualSPHysics

Author

Listed:
  • Ropero-Giralda, Pablo
  • Crespo, Alejandro J.C.
  • Tagliafierro, Bonaventura
  • Altomare, Corrado
  • Domínguez, José M.
  • Gómez-Gesteira, Moncho
  • Viccione, Giacomo

Abstract

Smoothed Particle Hydrodynamics (SPH) method is used here to simulate a heaving point-absorber with a Power Take-Off system (PTO). The SPH-based code DualSPHysics is first validated with experimental data of regular waves interacting with the point-absorber. Comparison between the numerical and experimental heave displacement and velocity of the device show a good agreement for a given regular wave condition and different configurations of the PTO system. The validated numerical tool is then employed to investigate the efficiency of the proposed system. The efficiency, which is defined here as the ratio between the power absorbed by the point-absorber and its theoretical maximum, is obtained for different wave conditions and several arrangements of the PTO. Finally, the effects of highly energetic sea states on the buoy are examined through alternative configurations of the initial system. A survivability study is performed by computing the horizontal and vertical forces exerted by focused waves on the wave energy converter (WEC). The yield criterion is used to determine that submerging the heaving buoy at a certain depth is the most effective strategy to reduce the loads acting on the WEC and its structure, while keeping the WEC floating at still water level is the worst-case scenario.

Suggested Citation

  • Ropero-Giralda, Pablo & Crespo, Alejandro J.C. & Tagliafierro, Bonaventura & Altomare, Corrado & Domínguez, José M. & Gómez-Gesteira, Moncho & Viccione, Giacomo, 2020. "Efficiency and survivability analysis of a point-absorber wave energy converter using DualSPHysics," Renewable Energy, Elsevier, vol. 162(C), pages 1763-1776.
    • Handle: RePEc:eee:renene:v:162:y:2020:i:c:p:1763-1776
    DOI: 10.1016/j.renene.2020.10.012
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    1. Pablo Ropero-Giralda & Alejandro J. C. Crespo & Ryan G. Coe & Bonaventura Tagliafierro & José M. Domínguez & Giorgio Bacelli & Moncho Gómez-Gesteira, 2021. "Modelling a Heaving Point-Absorber with a Closed-Loop Control System Using the DualSPHysics Code," Energies, MDPI, vol. 14(3), pages 1-20, February.
    2. Amini, Erfan & Mehdipour, Hossein & Faraggiana, Emilio & Golbaz, Danial & Mozaffari, Sevda & Bracco, Giovanni & Neshat, Mehdi, 2022. "Optimization of hydraulic power take-off system settings for point absorber wave energy converter," Renewable Energy, Elsevier, vol. 194(C), pages 938-954.
    3. Bonaventura Tagliafierro & Madjid Karimirad & Iván Martínez-Estévez & José M. Domínguez & Giacomo Viccione & Alejandro J. C. Crespo, 2022. "Numerical Assessment of a Tension-Leg Platform Wind Turbine in Intermediate Water Using the Smoothed Particle Hydrodynamics Method," Energies, MDPI, vol. 15(11), pages 1-23, May.
    4. Tagliafierro, Bonaventura & Martínez-Estévez, Iván & Domínguez, José M. & Crespo, Alejandro J.C. & Göteman, Malin & Engström, Jens & Gómez-Gesteira, Moncho, 2022. "A numerical study of a taut-moored point-absorber wave energy converter with a linear power take-off system under extreme wave conditions," Applied Energy, Elsevier, vol. 311(C).
    5. Zhigang Liu & Wei Huang & Shi Liu & Xiaomei Wu & Chun Sing Lai & Yi Yang, 2023. "An Improved Hydraulic Energy Storage Wave Power-Generation System Based on QPR Control," Energies, MDPI, vol. 16(2), pages 1-18, January.
    6. Ji Woo Nam & Yong Jun Sung & Seong Wook Cho, 2021. "Effective Mooring Rope Tension in Mechanical and Hydraulic Power Take-Off of Wave Energy Converter," Sustainability, MDPI, vol. 13(17), pages 1-20, August.

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