Modelling of wave attenuation induced by multi-purpose floating structures used for power supply and coastal protection

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

Experiments have been performed in the Shallow Water Wave Basin of DHI (Hørsholm, Denmark) within the EU FP7 Hydralab Programme, on large farms of up to 25 heaving point absorber type Wave Energy Converters (WECs). For a range of geometric lay-out configurations and wave conditions (regular, polychromatic, long- and short-crested irregular waves), WEC response and modification of the wave field have been measured to provide data for the understanding of WEC farm interactions and for the evaluation of farm interaction numerical models. A first extensive wave farm database is established. The experimental arrangement and the obtained database are presented, as well as results for wave height attenuation downwave of the farms. For long-crested irregular waves, up to 18.1 % and 20.8 % reduction in significant wave height is observed downwave of the 5×5-WEC rectilinear and staggered farm, respectively. Wave height attenuation is expected to be larger, since in practical wave farm applications WECs will be controlled to extract a large amount of power from the waves, and therefore the array will cause larger wave height dissipation. These findings present the ability to combine the harvesting of energy from sea waves with coastal defence systems, resulting in cost reduction for both applications when WECs operate as multi-purpose devices.

Original languageEnglish (US)
Title of host publicationProceedings of the Coastal Engineering Conference
PublisherAmerican Society of Civil Engineers (ASCE)
Volume2014-January
ISBN (Print)9780989661126
Publication statusPublished - 2014
Externally publishedYes
Event34th International Conference on Coastal Engineering, ICCE 2014 - Seoul, Korea, Republic of
Duration: Jun 15 2014Jun 20 2014

Other

Other34th International Conference on Coastal Engineering, ICCE 2014
CountryKorea, Republic of
CitySeoul
Period6/15/146/20/14

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Keywords

  • Coastal protection
  • DHI Shallow Water Wave Basin
  • EU FP7 HYDRALAB IV
  • Floating structures
  • Point absorber WECs
  • Wave energy converters
  • Wave height attenuation
  • WEC farms
  • WEC parks

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Ocean Engineering
  • Oceanography

Cite this

Stratigaki, V., Troch, P. A., Stallard, T., Forehand, D., Kofoed, J. P., Folley, M., ... Kirkegaard, J. (2014). Modelling of wave attenuation induced by multi-purpose floating structures used for power supply and coastal protection. In Proceedings of the Coastal Engineering Conference (Vol. 2014-January). American Society of Civil Engineers (ASCE).