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Energy Conversion: A Comparison of Fix- and Self-Referenced Wave Energy Converters

Author

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  • Wanan Sheng

    (Marine and Renewable Energy Ireland, Environment Research Institute, University College Cork, P43 C573 Cork, Ireland)

  • Tony Lewis

    (Marine and Renewable Energy Ireland, Environment Research Institute, University College Cork, P43 C573 Cork, Ireland)

Abstract

The paper presents an investigation of fix-referenced and self-referenced wave energy converters and a comparison of their corresponding wave energy conversion capacities from real seas. For conducting the comparisons, two popular wave energy converters, point absorber and oscillating water column, and their power conversion capacities in the fixed-referenced and self-referenced forms have been numerically studied and compared. In the numerical models, the device’s power extractions from seas are maximized using the correspondingly optimized power take-offs in different sea states, thus their power conversion capacities can be calculated and compared. From the comparisons and analyses, it is shown that the energy conversion capacities of the self-referenced devices can be significantly increased if the motions of the device itself can be utilized for wave energy conversion; and the self-referenced devices can be possibly designed to be compliant in long waves, which could be a very beneficial factor for device survivability in the extreme wave conditions (normally long waves). In this regards, the self-referenced WECs (wave energy converters) may be better options in terms of wave energy conversion from the targeted waves in seas (frequently the most occurred), and in terms of the device survivability, especially in the extreme waves when compared to the fix-referenced counterparts.

Suggested Citation

  • Wanan Sheng & Tony Lewis, 2016. "Energy Conversion: A Comparison of Fix- and Self-Referenced Wave Energy Converters," Energies, MDPI, vol. 9(12), pages 1-19, December.
    • Handle: RePEc:gam:jeners:v:9:y:2016:i:12:p:1056-:d:85272
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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.
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    4. Gomes, R.P.F. & Henriques, J.C.C. & Gato, L.M.C. & Falcão, A.F.O., 2012. "Hydrodynamic optimization of an axisymmetric floating oscillating water column for wave energy conversion," Renewable Energy, Elsevier, vol. 44(C), pages 328-339.
    5. Falcão, António F.O. & Henriques, João C.C. & Cândido, José J., 2012. "Dynamics and optimization of the OWC spar buoy wave energy converter," Renewable Energy, Elsevier, vol. 48(C), pages 369-381.
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    Cited by:

    1. 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.
    2. Anne Blavette & Charles‐henri Bonnard & Ildar Daminov & Salvy Bourguet & Thomas Soulard, 2021. "Upgrading wave energy test sites by including overplanting: a techno‐economic analysis," Post-Print hal-03246886, HAL.
    3. Simon Thomas & Marianna Giassi & Malin Göteman & Martyn Hann & Edward Ransley & Jan Isberg & Jens Engström, 2018. "Performance of a Direct-Driven Wave Energy Point Absorber with High Inertia Rotatory Power Take-off," Energies, MDPI, vol. 11(9), pages 1-17, September.
    4. Ermando Petracca & Emilio Faraggiana & Alberto Ghigo & Massimo Sirigu & Giovanni Bracco & Giuliana Mattiazzo, 2022. "Design and Techno-Economic Analysis of a Novel Hybrid Offshore Wind and Wave Energy System," Energies, MDPI, vol. 15(8), pages 1-28, April.
    5. Sheng, Wanan, 2019. "Wave energy conversion and hydrodynamics modelling technologies: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 109(C), pages 482-498.

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