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Numerical simulation of wake effects in the lee of a farm of Wave Dragon wave energy converters
Beels, C.; Troch, P.; De Visch, K.; De Backer, G.; De Rouck, J.; Kofoed, J.P. (2009). Numerical simulation of wake effects in the lee of a farm of Wave Dragon wave energy converters, in: Proceedings of the 8th European wave and tidal energy conference : EWTEC 2009. pp. 961-972
In: (2009). Proceedings of the 8th European wave and tidal energy conference : EWTEC 2009. Uppsala Universitet: Uppsala.
Beschikbaar in  Auteurs 
Documenttype: Congresbijdrage
Trefwoord
    Marien/Kust
Author keywords
    Farm; Wave Energy; Wave Energy Farms; Wakes; Wake Effects; Mild-Slope Equations
Auteurs  Top 
  • Beels, C.
  • Troch, P.
  • De Visch, K.
  • De Backer, G.
  • De Rouck, J.
  • Kofoed, J.P.
Abstract
    The contribution of wave energy to the renewable energy supply is rising. To extract a considerable amount of wave power,Wave Energy Converters (WECs) are arranged in several rows or in a ‘farm'. The wake behind each individual WEC in the farm affects the power absorption of its neighbouring WECs.In this paper wake effects in the lee of a single Wave Dragon WEC and multiple Wave Dragon WECs are studied in a time-dependent mild-slope equation model. The Wave Dragon WEC is a floating offshore converter of the overtopping type. The water volume of overtopped waves is first captured in a basin above mean sea level and then drains back to the sea through hydro turbines.The wake dimensions behind a single Wave Dragon WEC are investigated for uni- and multidirectional waves. An increasing directional spreading results in a faster wave redistribution behind the WEC. The power absorption of a farm of five Wave Dragon WECs, installed in a staggered grid, is calculated for varying inbetween distances. It is observed that an in-between distance of 2D is preferred, when taking spatial and safety considerations into account.
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