Efficiency analysis of a 3-DOF wave energy converter (SJTU-WEC) based on modeling, simulation and experiment

Weixing Chen, Zheng Wu, Jimu Liu, Zhenlin Jin, Xiantao Zhang and Feng Gao

Energy, 2021, vol. 220, issue C

Abstract: Wave energy is one of the most remarkable energy in the ocean, which bears attractive characteristics including inexhaustible, renewable and more predictable. Nowadays, the development of the wave energy converter (WEC) is still in the research stage; improving the efficiency is one of the key steps to promote the application process of WECs. This paper proposes a novel 3-degree-of-freedom (3-DOF) WEC called SJTU-WEC; moreover, methods to obtain the conversion efficiency for the each part are proposed. First, the principle of the SJTU-WEC is introduced, and the dynamic model of the SJTU-WEC is established; Next, the capture width ratios (CWRs) of the SJTU-WEC under different waves are obtained based on the Simulink model, and the simulation results show that optimal CWR is above 80%. A 1:80 scaled prototype of the 3-DOF mechanism is built, and the mechanical efficiency for the mechanism is tested to be about 90%. Moreover, a 1:4 scaled prototype of the energy conversion device (ECD) is built, and the efficiency of the ECD based on the power recovery method is tested to be about 80%. Finally, based on the modeling, simulation and experiment, the optimal conversion efficiency from the wave energy to the hydraulic energy of the SJTU-WEC is predicted to be more than 57.6%.

Keywords: SJTU-WEC; Efficiency; Modeling; Simulation; Experiment (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:220:y:2021:i:c:s0360544220328255

DOI: 10.1016/j.energy.2020.119718

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