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Modeling and Validation of an Electrohydraulic Power Take-Off System for a Portable Wave Energy Convertor with Compressed Energy Storage

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  • Hao Tian

    (Mechanical Engineering Department, Dalian Maritime University, Dalian 116026, China
    Liaoning Key Laboratory on Rescue and Salvage Engineering, Dalian Maritime University, Dalian 116026, China)

  • Zijian Zhou

    (Mechanical Engineering Department, Dalian Maritime University, Dalian 116026, China)

  • Yu Sui

    (Mechanical Engineering Department, Dalian Maritime University, Dalian 116026, China)

Abstract

Small-scale, portable generation of electricity from ocean waves provides a versatile solution to power the ocean sensors network, in addition to the traditional large-scale wave energy conversion facilities. However, one issue of small-scale wave energy convertor (WEC) is the low capturable power density, challenging the design of the efficient power take-off (PTO) system. To tackle this challenge, in this paper, an electrohydraulic PTO system with compressed energy storage was proposed to boost output power of a portable WEC. Lumped-parameter kinematics and dynamics of the four-bar mechanism, the fluid dynamics of the digital fluid power circuit, and the mechanical and volumetric power losses were modeled and experimentally validated. Initial test results of the 0.64 m 2 footprint prototype showed that the inclusion of storage improved the averaged electric power output over 40 times compared to the traditional architecture, and the proposed device can deliver up to 122 W at peaks.

Suggested Citation

  • Hao Tian & Zijian Zhou & Yu Sui, 2019. "Modeling and Validation of an Electrohydraulic Power Take-Off System for a Portable Wave Energy Convertor with Compressed Energy Storage," Energies, MDPI, vol. 12(17), pages 1-15, September.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:17:p:3378-:d:263160
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    References listed on IDEAS

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