Design, dynamic modeling and wave basin verification of a Hybrid Wave–Current Energy Converter

Shuo Chen, Boxi Jiang, Xiaofan Li, Jianuo Huang, Xian Wu, Qiuchi Xiong, Robert G. Parker and Lei Zuo

Applied Energy, 2022, vol. 321, issue C, No S0306261922006717

Abstract: Massive and high-density Marine and Hydrokinetic (MHK) energy is contained in the ocean, including waves, tidal streams, and ocean currents. Traditional MHK energy converters harvest energy from only a single MHK energy source, which does not fully exploit the energy potential that co-exists in multiple forms of MHK energy in the ocean. This paper presents the design and dynamics of a Hybrid Wave–Current Energy Converter (HWCEC) that can simultaneously convert both wave and current energy to electricity with a single Power Take-off (PTO) through the engagement and disengagement of the three one-way clutches. The critical design parameters are analyzed through modeling and simulation, including the transmission ratios, the electrical impedance, and the turbine-heave plate distance. Water basin tests in a wave–current tank were conducted, which shows the prototyped HWCEC can improve the electric power output by 38%–71% for regular waves and 79% for irregular waves, while providing a 70% reduction of the Peak to Average Ratio (PAR) of power compared to the baseline Wave Energy Converter (WEC). We further analyze the occurring percentages of the instant power of both WEC and HWCEC in irregular wave tests, shedding new insight on how HWCEC reduces the PAR.

Keywords: Wave energy converter; Tidal hydrokinetic energy converter; Hybrid Wave and Current Energy Converter; Wave basin verification; Peak to average ratio of power (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (2)

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DOI: 10.1016/j.apenergy.2022.119320

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