Numerical Study on Energy Absorption of a Floater for Design of Wave Energy Convertor in Ocean

Abstract: In order to design a wave energy generating system, a 6-DOF analysis technique is applied to the three-Dimensional CFD analysis on of a floating body and the behavior is interpreted according to thenature of the incoming wave. A wave period of 5.5s & amplitude of 0.57m from Marado is chosen. 12 case of natural pitching period from 1.25 to 2.8s has been modeled. The relation between tuning factor &pitch angle for the waves generated is compared to analyze the effects of energy absorption variables, namely mass moment of inertia, angular velocity and angular acceleration. From the results obtained, weconclude that model L is the maximum power absorbed, 6kW approximately. A maximum pitch angle of 1.91 degree was attained by Model F, and the maximum displacement of nearly 0.7m was attained by Model L among models D, F and L. Key words: Natural period, Tuning factor, Pitching angle, Angular velocity, Angular Acceleration †교신저자(부경대학교 기계자동차공학과, E-mail: ywlee@pknu.ac.kr, Tel: 051-629-6162)1 부경대학교 대학원 메카트로닉스공학과, E-mail: lkm7959@hotmail.com, Tel: 051- 629- 61622 부경대학교 대학원 메카트로닉스공학과, E-mail: partha@pknu.ac.kr, Tel: 051-629-77303 부경대학교 BK21 스마트기계 사업팀, E-mail: neoyoon@pknu.ac.kr, 051-629-6162