Abstract
The main type of wave power generation system now in use is the oscillating water column type. Most wave power generation systems of this type use the Wells turbine. The Wells turbine, however, is a low efficiency turbine. A non Wells turbine wave power generation system has been needed because of the bidirectional airflows of the break out of the surf and the backwash. An experiment regarding the practical use of an axial flow turbine in a wave power generation system has been performed at the Haramachi site continuously since 1996. This paper presents a summary of the efficiency of the axial flow turbine in a wave power generation system.