Geometric asymmetry in the energy conversion and wave attenuation of a power-take-off-integrated floating breakwater

A hybrid system integrating a power take-off (PTO) into floating breakwater is promising candidate for both shoreline protection and commercial wave energy extraction. Although geometric asymmetry important to such PTO-integrated breakwaters, its role in conversion efficiency attenuation poorly understood. In this study, two-dimensional semi-analytical model dealing with floats arbitrary bottom shapes established based on the potential flow theory. To quantify reflected by breakwaters different contours, degree of absolute are newly defined mathematically. set symmetric asymmetric comparatively studied demonstrate effect linear PTO damping transmission coefficient, reflection efficiency. Results show that no matter or asymmetric, larger beneficial longer waves, particularly at heaving natural period device. On premise optimized, an increase greatly improves An slightly attenuation.