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Wave Basin Experiments with Large Wave Energy Converter Arrays to Study Interactions between the Converters and Effects on Other Users in the Sea and the Coastal Area

Author

Listed:
  • Vasiliki Stratigaki

    (Department of Civil Engineering, Ghent University, Technologiepark 904, Zwijnaarde B-9052, Belgium)

  • Peter Troch

    (Department of Civil Engineering, Ghent University, Technologiepark 904, Zwijnaarde B-9052, Belgium)

  • Tim Stallard

    (School of Mechanical Aerospace and Civil Engineering, University of Manchester, Manchester M13 9PL, UK)

  • David Forehand

    (Institute for Energy Systems, School of Engineering, The University of Edinburgh, Edinburgh EH9 3JL, UK)

  • Jens Peter Kofoed

    (Wave Energy Research Group, Department of Civil Engineering, Aalborg University, Aalborg 9000, Denmark)

  • Matt Folley

    (School of Planning, Architecture & Civil Engineering, Queen's University Belfast, Belfast BT9 5AG, Northern Ireland, UK)

  • Michel Benoit

    (Saint-Venant Laboratory for Hydraulics, EDF-Recherche et Développement, Laboratoire Saint-Venant (EDF R&D, CETMEF, Ecole des Ponts ParisTech), Chatou 78401, France)

  • Aurélien Babarit

    (Ocean Energy and Ocean Waves Group, Ecole Centrale de Nantes, LHEAA Lab-CNRS UMR6598: Hydrodynamics, Energetics, Atmospheric Environment, Nantes 44321, France)

  • Jens Kirkegaard

    (Ports and Offshore Technology, DHI, Agern Allé 5, Hørsholm DK-2970, Denmark)

Abstract

Experiments have been performed in the Shallow Water Wave Basin of DHI (Hørsholm, Denmark), on large arrays of up to 25 heaving point absorber type Wave Energy Converters (WECs), for a range of geometric layout configurations and wave conditions. WEC response and modifications of the wave field are measured to provide data for understanding WEC array interactions and to evaluate array interaction numerical models. Each WEC consists of a buoy with a diameter of 0.315 m and power take-off (PTO) is modeled by realizing friction based energy dissipation through damping of the WEC’s motion. Wave gauges are located within and around the WEC array. Wave conditions studied include regular, polychromatic, long- and short-crested irregular waves. A rectilinear arrangement of WEC support structures is employed such that several array configurations can be studied. In this paper, the experimental arrangement and the obtained database are presented. Also, results for wave height attenuation downwave a rectilinear array of 25 heaving WECs are presented, for the case of irregular waves. Up to 16.3% and 18.1% (long-crested) and 11.2% and 18.1% (short-crested waves) reduction in significant wave height is observed downwave the WEC array, for the radiated wave field only and for the combination of incident-diffracted-radiated (perturbed) wave field, respectively. Using spectra at different locations within and around the array, the wave field modifications are presented and discussed.

Suggested Citation

  • Vasiliki Stratigaki & Peter Troch & Tim Stallard & David Forehand & Jens Peter Kofoed & Matt Folley & Michel Benoit & Aurélien Babarit & Jens Kirkegaard, 2014. "Wave Basin Experiments with Large Wave Energy Converter Arrays to Study Interactions between the Converters and Effects on Other Users in the Sea and the Coastal Area," Energies, MDPI, vol. 7(2), pages 1-34, February.
    • Handle: RePEc:gam:jeners:v:7:y:2014:i:2:p:701-734:d:32859
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    References listed on IDEAS

    as
    1. Babarit, A., 2013. "On the park effect in arrays of oscillating wave energy converters," Renewable Energy, Elsevier, vol. 58(C), pages 68-78.
    2. Zanuttigh, Barbara & Angelelli, Elisa & Kofoed, Jens Peter, 2013. "Effects of mooring systems on the performance of a wave activated body energy converter," Renewable Energy, Elsevier, vol. 57(C), pages 422-431.
    3. Li, Ye & Yu, Yi-Hsiang, 2012. "A synthesis of numerical methods for modeling wave energy converter-point absorbers," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(6), pages 4352-4364.
    4. Beels, Charlotte & Troch, Peter & De Visch, Kenneth & Kofoed, Jens Peter & De Backer, Griet, 2010. "Application of the time-dependent mild-slope equations for the simulation of wake effects in the lee of a farm of Wave Dragon wave energy converters," Renewable Energy, Elsevier, vol. 35(8), pages 1644-1661.
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