A semi-analytical model of a hybrid wave energy conversion system that employs a submerged heaving buoy before a Jarlan-type breakwater had been presented, and a comparison was conducted to illustrate the system's superiority. The energy conversion and wave attenuation capabilities, as well as both vertical and horizontal wave forces operating on the hybrid system, were explored under the geometrical and physical parameters of the model. The separated variable approach and the matching eigenfunction method were utilized to develop this model, which was then validated using the wave energy conservation principle. The findings indicate that installing a Jarlan-type breakwater downstream of the buoy weakens the wave attenuation and energy capture capabilities of the device while relieving the structural forces, whereas the submerged buoy alleviates this problem very well. Furthermore, adopting reasonable parameters could improve the general efficiency of the system. In short, a thin buoy of appropriate width that is not too close to the water surface performs better and should be at an appropriate distance from the Jarlan-type breakwater to balance operational performance and structural loads.
Yang et al. (Thu,) studied this question.