Community Research and Development Information Service - CORDIS


WAVEIMPACT Report Summary

Project ID: 618556
Funded under: FP7-PEOPLE
Country: United Kingdom

Periodic Report Summary 1 - WAVEIMPACT (Wave Farm Impacts and Design)

The WAVEIMPACT project has several objectives, chief among which is to characterise the interaction of a wave energy farm with the wave field. This will be accomplished through laboratory testing of a single Wave Energy Converter (WEC) followed by testing using multiple WECs in several different configurations. The results of the laboratory tests will then used to validate a numerical model, case studies will be defined, run and analysed, and a set of guidelines will be produced based on the outcome of the case studies.
Thus far, a single model WEC, based on the WaveCat energy converter, has been constructed and tested within the University of Plymouth COAST Laboratory. The WaveCat is an floating, overtopping WEC consisting of two converging hulls containing reservoirs to capture, hold and release overtopping water. The volume of water captured, and therefore the power generated, can be controlled through varying the angle between the hulls, the freeboard of the device and the trim at which the device sits in the water.
The experiments completed in this research period have determined the 6 degree of freedom motion of the device, for both regular and irregular waves, with and without overtopping in the model. The motions of the device in the absence of overtopping are used in the initial calibration of the numerical model, with motion under the influence of overtopping used for further calibration of the numerical model.
The overtopping of the model was also measured and an estimate of power produced from irregular wave tests. The level of water in the reservoirs was measured, the flowrate monitored, and the corresponding power output estimated. The numerical model was also calibrated to take into account the effect of overtopping on the motions of the device.
The interaction of the device with the wave field was measured using wave gauges to the fore and aft of the device. The difference between fore and aft wave spectra was analysed to characterise the interaction of the model WEC with the wave field and, in particular, to determine for which wave conditions the incident waves were attenuated most in the lee of the model (in its wake) through the extraction, dissipation and reflection of wave energy by the device.
The numerical model is calibrated for the motions of a single device in regular and irregular waves, firstly without overtopping and then with overtopping. The numerical model will subsequently be expanded to include multiple models in different configurations representative of several case studies.


John Martin, (Head of Research Support & Development)
Tel.: +441752588931


Life Sciences
Record Number: 189536 / Last updated on: 2016-10-11