Wave power extraction from a hybrid oscillating water column-oscillating buoy wave energy converter

Oscillating water column (OWC) devices and oscillating buoys (OBs) are two of the main types wave energy converters (WECs). In this paper a hybrid column-oscillating buoy converter is proposed, which we have named OWCOB. The hinged at outer wall column. As waves propagate through OWCOB, within OWC chamber moves up down, producing air flow to propel turbine. Meanwhile, oscillation OB drives separate hydraulic system. To solve diffraction radiation problems OWCOB investigate its capture performance, an analytical model developed based on linear potential theory eigenfunction matching method. Assuming that PTOs both linear, power extraction evaluated in frequency domain. Of configurations considered, with opening waveward leeward found broader primary band compared same side. Further, thorough sensitivity analysis carried out considering design parameters (size submergence opening, distance between OB, hinge elevation, radius), can form basis optimization study for particular climate. Importantly, find performs generally better than stand-alone OWCs OBs, not least terms bandwidth.