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Hydrodynamic Investigation of a Concentric Cylindrical OWC Wave Energy Converter

Author

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  • Yu Zhou

    (State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
    Offshore Renewable Energy Research Center, Dalian University of Technology, Dalian 116024, China)

  • Chongwei Zhang

    (State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
    Offshore Renewable Energy Research Center, Dalian University of Technology, Dalian 116024, China)

  • Dezhi Ning

    (State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
    Offshore Renewable Energy Research Center, Dalian University of Technology, Dalian 116024, China)

Abstract

A fixed, concentric, cylindrical oscillating water column (OWC) wave energy converter (WEC) is proposed for shallow offshore sites. Compared with the existing shoreline OWC device, this wave energy device is not restricted by the wave directions and coastline geography conditions. Analytical solutions are derived based on the linear potential-flow theory and eigen-function expansion technique to investigate hydrodynamic properties of the device. Three typical free-surface oscillation modes in the chamber are discussed, of which the piston-type mode makes the main contribution to the energy conversion. The effects of the geometrical parameters on the hydrodynamic properties are further investigated. The resonance frequency of the chamber, the power extraction efficiency, and the effective frequency bandwidth of the device is discussed, amongst other topics. It is found that the proposed OWC-WEC device with a lower draft and wider chamber breadth has better power extraction ability.

Suggested Citation

  • Yu Zhou & Chongwei Zhang & Dezhi Ning, 2018. "Hydrodynamic Investigation of a Concentric Cylindrical OWC Wave Energy Converter," Energies, MDPI, vol. 11(4), pages 1-23, April.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:4:p:985-:d:141940
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    References listed on IDEAS

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    Cited by:

    1. Oscar Barambones & Jose M. Gonzalez de Durana & Isidro Calvo, 2018. "Adaptive Sliding Mode Control for a Double Fed Induction Generator Used in an Oscillating Water Column System," Energies, MDPI, vol. 11(11), pages 1-27, October.
    2. Iván López & Rodrigo Carballo & David Mateo Fouz & Gregorio Iglesias, 2021. "Design Selection and Geometry in OWC Wave Energy Converters for Performance," Energies, MDPI, vol. 14(6), pages 1-18, March.
    3. Zhou, Yu & Ning, Dezhi & Liang, Dongfang & Cai, Shuqun, 2021. "Nonlinear hydrodynamic analysis of an offshore oscillating water column wave energy converter," Renewable and Sustainable Energy Reviews, Elsevier, vol. 145(C).
    4. Ning, De-zhi & Zhou, Yu & Mayon, Robert & Johanning, Lars, 2020. "Experimental investigation on the hydrodynamic performance of a cylindrical dual-chamber Oscillating Water Column device," Applied Energy, Elsevier, vol. 260(C).
    5. Dimitrios N. Konispoliatis, 2023. "The Effect of Hydrodynamics on the Power Efficiency of a Toroidal Oscillating Water Column Device," Sustainability, MDPI, vol. 15(16), pages 1-29, August.

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