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Experimental Study Related to the Mooring Design for the 1.5 MW Wave Dragon WEC Demonstrator at DanWEC

Author

Listed:
  • Stefano Parmeggiani

    (Wave Dragon Ltd., 869 High Road, London N12 8QA, UK
    Department of Civil Engineering, Aalborg University, Sohngaardsholmsvej 57, DK-9000 Aalborg, Denmark)

  • Jens Peter Kofoed

    (Department of Civil Engineering, Aalborg University, Sohngaardsholmsvej 57, DK-9000 Aalborg, Denmark)

  • Erik Friis-Madsen

    (Wave Dragon Ltd., 869 High Road, London N12 8QA, UK)

Abstract

The paper presents the results of an experimental study identifying the response of a 1.5 MW Wave Dragon to extreme conditions typical of the DanWEC test center. The best strategies allowing for a reduction in the extreme mooring tension have also been investigated, showing that this is possible by increasing the surge natural period of the system. The most efficient strategy in doing this is to provide the mooring system with a large horizontal compliance (typically in the order of 100 s), which shall be therefore assumed as design configuration. If this is not possible, it can also be partly achieved by lowering the floating level to a minimum (survivability mode) and by adopting a negative trim position. The adoption of the design configuration would determine in a 100-year storm extreme mooring tensions in the order of 0.9 MN, 65% lower than the worst case experienced in the worst case configuration. At the same time it would lead to a reduction in the extreme motion response, resulting in heave and pitch oscillation heights of 7 m and 19° and surge excursion of 12 m. Future work will numerically identify mooring configurations that could provide the desired compliance.

Suggested Citation

  • Stefano Parmeggiani & Jens Peter Kofoed & Erik Friis-Madsen, 2013. "Experimental Study Related to the Mooring Design for the 1.5 MW Wave Dragon WEC Demonstrator at DanWEC," Energies, MDPI, vol. 6(4), pages 1-24, April.
    • Handle: RePEc:gam:jeners:v:6:y:2013:i:4:p:1863-1886:d:24699
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    References listed on IDEAS

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    1. Kofoed, Jens Peter & Frigaard, Peter & Friis-Madsen, Erik & Sørensen, Hans Chr., 2006. "Prototype testing of the wave energy converter wave dragon," Renewable Energy, Elsevier, vol. 31(2), pages 181-189.
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    Cited by:

    1. Stefano Parmeggiani & Jens Peter Kofoed & Erik Friis-Madsen, 2013. "Experimental Update of the Overtopping Model Used for the Wave Dragon Wave Energy Converter," Energies, MDPI, vol. 6(4), pages 1-32, April.
    2. Zanuttigh, Barbara & Angelelli, Elisa & Kortenhaus, Andreas & Koca, Kaan & Krontira, Yukiko & Koundouri, Phoebe, 2016. "A methodology for multi-criteria design of multi-use offshore platforms for marine renewable energy harvesting," Renewable Energy, Elsevier, vol. 85(C), pages 1271-1289.
    3. Oikonomou, C.L.G. & Gomes, R.P.F. & Gato, L.M.C. & Falcão, A.F.O., 2020. "On the dynamics of an array of spar-buoy oscillating water column devices with inter-body mooring connections," Renewable Energy, Elsevier, vol. 148(C), pages 309-325.
    4. Luca Martinelli & Matteo Volpato & Chiara Favaretto & Piero Ruol, 2019. "Hydraulic Experiments on a Small-Scale Wave Energy Converter with an Unconventional Dummy Pto," Energies, MDPI, vol. 12(7), pages 1-12, March.
    5. Xu, Sheng & Wang, Shan & Guedes Soares, C., 2019. "Review of mooring design for floating wave energy converters," Renewable and Sustainable Energy Reviews, Elsevier, vol. 111(C), pages 595-621.
    6. Dongsheng Qiao & Rizwan Haider & Jun Yan & Dezhi Ning & Binbin Li, 2020. "Review of Wave Energy Converter and Design of Mooring System," Sustainability, MDPI, vol. 12(19), pages 1-31, October.

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