Abstract
AbstractThe energy demand in the world is increasing and the traditional energy resources like fossil are depleting. The generation of electricity using fossil fuel is polluting the environment. Hence the development of renewable and green energy resources is essential. Wave energy is such renewable and pollution free energy resource. The waves are generated by the wind blowing on a large area for long duration of time. The energy is concentrated in the wave form. The waves are more predictable. Hence wave energy is a promising energy resource. The Wave Energy Converter, WEC, is a unit which interacts with the waves in the near shore region and captures part of the wave energy. Thus the study of performance of wave energy converter, WEC, is an important area of ongoing research. The transmission through WEC was assessed primarily using wave flume tests. In last ten years the numerical studies of wave absorption and transmission through a WEC by considering the WEC as a permeable breakwater have been undertaken. To make wave energy extraction viable, wave energy farms consisting of many WECs will be necessary. Wave farms will maximize the production of electricity with affordable investment. Various configurations of the wave energy farm are being studied numerically using third generation wave transformation and propagation models. The Boussinesq Wave (BW) model can simulate wave penetration through permeable structures and also considers diffraction effects. In the present study, the wave transmission through array of WEC's for the three configurations consisting of a) single row of WEC's, b) Two rows of WEC's and c) Staggered array of WECs is investigated using MIKE 21 BW model. The effect of horizontal and vertical spacing for various wave heights and wave frequencies is estimated in a numerical flume. The optimal spacing depends on the wave length. The detailed results are presented in this paper.KeywordsWave Energy ConverterTransmission coefficientPermeable breakwaterBoussinesq wave model
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