Numerical simulation of wake effects in the lee of a farm of wave energy converters
Beels, C.; Troch, P.; De Rouck, J.; Versluys, T.; De Backer, G. (2009). Numerical simulation of wake effects in the lee of a farm of wave energy converters, in: ASME 2009 28th international conference on ocean, offshore and arctic engineering (OMAE2009)- May 31–June 5, 2009, Honolulu, Hawaii, USA - Volume 4: ocean engineering; ocean renewable energy; ocean space utilization, parts A and B. pp. 1-11. https://dx.doi.org/10.1115/OMAE2009-79714 In: (2009). ASME 2009 28th international conference on ocean, offshore and arctic engineering (OMAE2009)- May 31–June 5, 2009, Honolulu, Hawaii, USA - Volume 4: ocean engineering; ocean renewable energy; ocean space utilization, parts A and B. American Society of Mechanical Engineers (ASME): New York. ISBN 978-0-7918-4344-4. , more |
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| 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'. WECs in a farm are interacting (e.g. The presence of other WECs influence the operational behaviour of a single WEC) and the overall power absorption is affected. In this paper wake effects in the lee of a single WEC and multiple WECs of the overtopping type, where 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, are studied in a time-dependent mild-slope equation model. The wake behind a single WEC is investigated for uni- and multi-directional incident waves. The wake becomes wider for larger wave peak periods. An increasing directional spreading results in a faster wave regeneration and a shorter wake behind the WEC. The wake in the lee of multiple WECs is calculated for two different farm lay-outs, i.e. an aligned grid and a staggered grid, with varying lateral and longitudinal spacing. In general, the staggered grid results in the highest overall wave power absorption. |
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