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Modelling of a flap-type wave energy converter farm in a mild-slope equation model for a wake effect assessment
Tomey-Bozo, Nicolas; Murphy, Jimmy; Troch, Peter; Lewis, Tony; Thomas, Gareth
It is expected that large farms of wave energy converters (WECs) will be installed and as part of the consenting process it will be necessary to quantify their impact on the local environment. The objective of this study is to assess the impact a WEC farm has on the incoming wave field through the use of a novel methodology. This methodology assesses the changes of the significant wave height surrounding a flap-type WEC farm with a special focus on the lee of the farm. A time-dependent mild-slope equation model is employed to solve the propagation of surface waves and their interaction with the devices. The model represents the devices as obstacle cells with attributed absorption coefficients tuned against near-fields obtained from a boundary element method (BEM) solver. The wake effect of the farm is determined by using a step-by-step approach starting first with an assessment of one device and progressively incrementing to a larger number of flaps. The effect of incident sea states, device separations and water depth changes on the wake effect of the farm is also investigated. This work shows the potential of a WEC farm to reduce significant wave heights on the leeside.
Keyword(s): Wave Energy Converters; WEC; Wave field; Time-dependent mild-slope equation; Leeside; Wakes; Wave power plants; Boundary-elements methods; BEM solver; Surface waves propagation; Wake effect assessment; Flap-type Wave Energy Converter farm; Boundary element method
Publication Date:
2017
Type: Journal article
Peer-Reviewed: Yes
Language(s): English
Institution: University College Cork
Citation(s): Tomey-Bozo, N., Murphy, J., Troch, P., Lewis, T. and Thomas, G. (2017) 'Modelling of a flap-type wave energy converter farm in a mild-slope equation model for a wake effect assessment', IET Renewable Power Generation, 11(9), pp. 142-1152.
Publisher(s): Institution of Engineering and Technology
File Format(s): application/pdf
First Indexed: 2018-06-01 06:30:46 Last Updated: 2018-06-01 06:30:46