Abstract
Ocean waves are one of the high-density renewable energy resources and can work as a generous, sustainable, and clean energy source. The energy capturing of a floating point absorber system is designed to be maximum when it is close to resonance. Integrating coastal protection structures with a wave energy converter can be a promising solution to extract wave energy economically. This paper investigates the influence of bottom shapes on the hydrodynamic performance of a cylindrical heaving floating point absorber wave energy converter stand-alone and integrated with breakwater conditions. The study is carried out for constant mass and constant draft model cases, providing identical conditions for comparison. It is seen that a cylinder with a 90° conical bottom has better performance for the same waterline diameter than all the other models. After the integration with a chambered breakwater, the power performance of the wave energy device was found to increase by a maximum of 3.5 times more than that of the stand-alone case for all the models at quasi-resonance conditions, especially when the WEC is positioned at locations of amplified wave elevations inside the chamber.