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Performance comparison of the floating and fully submerged quasi-point absorber wave energy converters

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  • Sergiienko, N.Y.
  • Cazzolato, B.S.
  • Ding, B.
  • Hardy, P.
  • Arjomandi, M.

Abstract

Axisymmetric point absorbers are mostly designed as floating buoys that extract power from heave motion. Power absorption limits of such wave energy converters (WECs) are governed by the displaced volume of the buoy and its ability to radiate waves. In the case of fully submerged WECs, the power performance becomes a function of additional variables including the proximity to the mean surface level of the water, body shape and the maximum stroke length of the power take-off system. Placing the body below the water surface increases its survivability in storm conditions but changes the hydrodynamic properties of the WEC including maximum absorbed power. This paper investigates the differences between floating and fully submerged point absorber converters from the number of perspectives including energy extraction, bandwidth, and optimal size for a particular wave climate. The results show that when compared with floating converters, fully submerged buoys: (i) generally absorb less power at longer wavelengths, (ii) have narrower bandwidth, (iii) cannot be replaced by smaller units of the same total volume without a significant loss of power, and (iv) have a significant advantage as they can effectively utilise several modes of motion (e.g. surge and heave) in order to increase power generation.

Suggested Citation

  • Sergiienko, N.Y. & Cazzolato, B.S. & Ding, B. & Hardy, P. & Arjomandi, M., 2017. "Performance comparison of the floating and fully submerged quasi-point absorber wave energy converters," Renewable Energy, Elsevier, vol. 108(C), pages 425-437.
    • Handle: RePEc:eee:renene:v:108:y:2017:i:c:p:425-437
    DOI: 10.1016/j.renene.2017.03.002
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    References listed on IDEAS

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    1. Babarit, A. & Hals, J. & Muliawan, M.J. & Kurniawan, A. & Moan, T. & Krokstad, J., 2012. "Numerical benchmarking study of a selection of wave energy converters," Renewable Energy, Elsevier, vol. 41(C), pages 44-63.
    2. Sergiienko, N.Y. & Cazzolato, B.S. & Ding, B. & Arjomandi, M., 2016. "An optimal arrangement of mooring lines for the three-tether submerged point-absorbing wave energy converter," Renewable Energy, Elsevier, vol. 93(C), pages 27-37.
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    Cited by:

    1. Tunde Aderinto & Hua Li, 2019. "Review on Power Performance and Efficiency of Wave Energy Converters," Energies, MDPI, vol. 12(22), pages 1-24, November.
    2. Erfan Amini & Danial Golbaz & Fereidoun Amini & Meysam Majidi Nezhad & Mehdi Neshat & Davide Astiaso Garcia, 2020. "A Parametric Study of Wave Energy Converter Layouts in Real Wave Models," Energies, MDPI, vol. 13(22), pages 1-23, November.
    3. Meng, Fantai & Ding, Boyin & Cazzolato, Benjamin & Arjomandi, Maziar, 2019. "Modal analysis of a submerged spherical point absorber with asymmetric mass distribution," Renewable Energy, Elsevier, vol. 130(C), pages 223-237.
    4. Zhang, Yongxing & Huang, Zhicong & Zou, Bowei & Bian, Jing, 2023. "Conceptual design and analysis for a novel parallel configuration-type wave energy converter," Renewable Energy, Elsevier, vol. 208(C), pages 627-644.
    5. Zhang, Yongxing & Zhao, Yongjie & Sun, Wei & Li, Jiaxuan, 2021. "Ocean wave energy converters: Technical principle, device realization, and performance evaluation," Renewable and Sustainable Energy Reviews, Elsevier, vol. 141(C).
    6. Jinming Wu & Yingxue Yao & Liang Zhou & Malin Göteman, 2017. "Latching and Declutching Control of the Solo Duck Wave-Energy Converter with Different Load Types," Energies, MDPI, vol. 10(12), pages 1-18, December.
    7. Nick J. Baker & Ahmed Almoraya & Mohammad A. H. Raihan & Steve McDonald & Luke McNabb, 2022. "Development and Wave Tank Demonstration of a Fully Controlled Permanent Magnet Drive for a Heaving Wave Energy Converter," Energies, MDPI, vol. 15(13), pages 1-21, June.
    8. Meng, Fantai & Cazzolato, Benjamin & Li, Ye & Ding, Boyin & Sergiienko, Natalia & Arjomandi, Maziar, 2019. "A sensitivity study on the effect of mass distribution of a single-tether spherical point absorber," Renewable Energy, Elsevier, vol. 141(C), pages 583-595.
    9. Alireza Shadmani & Mohammad Reza Nikoo & Riyadh I. Al-Raoush & Nasrin Alamdari & Amir H. Gandomi, 2022. "The Optimal Configuration of Wave Energy Conversions Respective to the Nearshore Wave Energy Potential," Energies, MDPI, vol. 15(20), pages 1-29, October.
    10. 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.
    11. da Silva, L.S.P. & Sergiienko, N.Y. & Cazzolato, B. & Ding, B., 2022. "Dynamics of hybrid offshore renewable energy platforms: Heaving point absorbers connected to a semi-submersible floating offshore wind turbine," Renewable Energy, Elsevier, vol. 199(C), pages 1424-1439.
    12. Guo, Bingyong & Ringwood, John V., 2021. "Geometric optimisation of wave energy conversion devices: A survey," Applied Energy, Elsevier, vol. 297(C).

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