A Study on Component Technologies for a Marine Renewable Floating Base

Abstract

This study proposed a large floating base to utilize several kinds of marine renewable energy at the same time. The paper describes a concept of the floating base on which wave energy convertors (WECs) are installed and component technologies to realize the concept. An oscillating water column type was applied to WECs. Power take-off (PTO) performance and motion characteristics of the floating base were predicted within linear assumption. A marine turbine is also investigated concretely, which is a pitch-controllable vertical axis marine turbine. From the sea tests of the floating type VAMT, availability of a pitch-controllable system is shown. In addition, component technologies to control an electrical generator for the turbine are discussed in the paper. Besides, ROV development to maintain marine structures is introduced briefly. The paper summarizes several studies to realize the floating base and shows fundamental items to develop a hybrid systems of marine renewable energy utilization.