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Model Test of Dual-Buoy Wave Energy Converter using Multi-resonance
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 Title & Authors
Model Test of Dual-Buoy Wave Energy Converter using Multi-resonance
Kim, Jeong-Rok; Hyeon, Jong-Wu; Koh, Hyeok-Jun; Kweon, Hyuck-Min; Cho, Il-Hyoung;
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In this study, we proposed a new type of dual-buoy wave energy converter (WEC) exploiting multi-resonance and analyzed the experimental results from a model test in a 2-D wave flume. A dual-buoy WEC using multi-resonance has two advantages: high efficiency at the resonant frequencies and the potential to extend the frequency range available to extract wave power from the WEC. The suggested WEC was composed of an outer buoy and an inner buoy sliding vertically inside the outer buoy. As the power take-off device, a linear electric generator (LEG) consisting of permanent magnets and coils fixed at each buoy was adopted. Electricity was produced by the relative heave motion between the two buoys. To search for the optimal shape of a dual-buoy WEC, we conducted experiments on the heave motion of a two-body system in regular waves without an LEG installed. Model tests with six combinations of experimental models were conducted in order to find the motion characteristics of a dual-buoy WEC. It was found that model 2, which included a ring-shaped appendage to move the resonant frequency of the outer buoy toward a high value, showed a higher relative heave response amplitude operator (RAO) curve than model 1. In addition, the double-peak shape of the heave RAO curve shown for model 2 indicated the extension of the frequency range for extracting wave power in irregular waves.
Wave energy converter(WEC);Internal fluid;Dual-buoy;Model test;Relative heave motion;Multi-resonance;
 Cited by
수직 진자형 파력 발전 장치의 운동성능 및 파력 추출에 관한 실험적 연구,김성재;구원철;민은홍;장호윤;윤동협;이병성;

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