Abstract
This paper describes effects of the projecting walls (PWs) to improvement of the wave energy absorption of oscillating water column (OWC) type wave energy convertors which are fixed on seabed and installed onto an existing breakwater. OWC types are one of a wave energy convertor and wave energy is firstly converted to energy of compressed air. The efficiency could be improved by installing PWs to conventional OWC type convertors. However, reasons of the improvement have not been clarified. The effects of the projecting walls to the efficiency were investigated from series calculations with the method presented in the study. In the investigations, motion behaviors of OWC and water region surrounded by PWs were compared and the reasons were discussed. Besides independently fixed types, variations and effects to the efficiency due to a breakwater were estimated in the paper.
