Experiments with Point Absorber Type Wave Energy Converters in a Large-Scale Wave Basin: The "WECwakes" Database

Vasiliki Stratigaki, Peter Troch, Tim Stallard, David Forehand, Jens Peter Kofoed, Matt Folley, Michel Benoit, Aurélien Babarit, Jens Kirkegaard, Marc Vantorre

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Abstract

Wave Energy Converters (WECs) extract energy from ocean waves and have the potential to produce a significant contribution of electricity from renewable sources. However, large "WEC farms" or "WEC arrays" are expected to have "WEC array effects", expressed as the impact of the WECs on the wave climate at an installation site, as well as on the overall power absorption of the WEC array. Experiments have been performed in the Shallow Water Wave Basin of DHI (Denmark) to study such "WEC array effects". Large arrays of up to 25 heaving point absorber type WECs have been tested for a range of geometric layout configurations and wave conditions. WEC response, wave induced forces on the WECs and wave field modifications have been measured. Each WEC consists of a buoy with diameter of 0.315 m. Power take-off is modeled by realizing friction based energy dissipation through damping of the WECs' motion. This unique experimental set-up of up to 25 individual WEC units in an array layout, placed in a large wave tank, is at present the largest set-up of its kind studying the important WEC array effects. The data obtained from these experimental tests will be very useful for the understanding of WEC array effects and for validation and extension of numerical models. This model validation will enable optimization of the geometrical layout of WEC arrays for real applications and reduction of the cost of energy from wave energy systems.
Original languageEnglish
Title of host publicationCoastlab 14 Book of Proceedings : Application of Physical Modelling to Port and Coastal Protection
EditorsValeri Penchev, Francisco Taveira Pinto
Number of pages11
Volume2
Publication date2014
Pages295-305
ISBN (Print)978-619-90271-1-0
Publication statusPublished - 2014
EventCoastlab 2014: Application of Physical Modelling to Port and coastal Protection - Varna, Bulgaria
Duration: 29 Sep 20142 Oct 2014
Conference number: 5

Conference

ConferenceCoastlab 2014
Number5
CountryBulgaria
CityVarna
Period29/09/201402/10/2014

Keywords

  • DHI shallaw water wave basin
  • Wave energy converter arrays
  • Roating structures
  • Wake effects
  • Wave form design
  • EU FP7 HYDRALAB IV
  • Wave energy converter farms
  • Wave energy converter parks
  • WECs

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    Stratigaki, V., Troch, P., Stallard, T., Forehand, D., Kofoed, J. P., Folley, M., Benoit, M., Babarit, A., Kirkegaard, J., & Vantorre, M. (2014). Experiments with Point Absorber Type Wave Energy Converters in a Large-Scale Wave Basin: The "WECwakes" Database. In V. Penchev, & F. Taveira Pinto (Eds.), Coastlab 14 Book of Proceedings: Application of Physical Modelling to Port and Coastal Protection (Vol. 2, pp. 295-305)