Wave power extraction by arbitrary arrays of non-diffracting oscillating water columns

A model to predict wave power conversion from arbitrary arrays of oscillating water columns is presented. Based on linear potential theory and idealized non-diffracting machines, it relies on a published analytical solution for the flow field generated by a single oscillating pressure patch on the ocean surface. Estimates of wave power conversion are obtained for several array configurations and well-defined wave resources at two sites in Hawaii, using a single-processor computer. Such results illustrate the versatility and computational efficiency of the model. The proposed approach allows a relatively easy evaluation of interferences among individual machines. This would be useful in optimizing the spatial arrangement of oscillating water columns in large wave farms.

► Simplified model evaluates the performance of arbitrary arrays of OWCs. ► Realistic power take-off mechanism (air turbine with no optimal phase control). ► Versatile model illustrated for several large arrays in realistic wave climates. ► Computationally efficient model demonstrated with single-processor calculations. ► Constructive interference (amplification) is possible with single incident waves.