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Wave-to-Wire Model Development and Validation for Two OWC Type Wave Energy Converters

Author

Listed:
  • Pierre Benreguig

    (MaREI Centre, Beaufort Building, University College Cork, Haubowline Road, P43C573 Ringaskiddy, Co. Cork, Ireland)

  • James Kelly

    (MaREI Centre, Beaufort Building, University College Cork, Haubowline Road, P43C573 Ringaskiddy, Co. Cork, Ireland)

  • Vikram Pakrashi

    (Dynamical Systems and Risk Laboratory, School of Mechanical and Materials Engineering, University College Dublin, D04V1W8 Dublin, Ireland
    SFI MaREI Centre, University College Dublin, D04V1W8 Dublin, Ireland
    The Energy Institute, University College Dublin, D04V1W8 Dublin, Ireland)

  • Jimmy Murphy

    (MaREI Centre, Beaufort Building, University College Cork, Haubowline Road, P43C573 Ringaskiddy, Co. Cork, Ireland)

Abstract

The Tupperwave device is a closed-circuit oscillating water column (OWC) wave energy converter that uses non-return valves and two large fixed-volume accumulator chambers to create a smooth unidirectional air flow, harnessed by a unidirectional turbine. In this paper, the relevance of the Tupperwave concept against the conventional OWC concept, that uses a self-rectifying turbine, is investigated. For this purpose, wave-to-wire numerical models of the Tupperwave device and a corresponding conventional OWC device are developed and validated against experimental tests. Both devices have the same floating spar buoy structure and a similar turbine technology. The models include wave-structure hydrodynamic interaction, air turbines and generators, along with their control laws in order to encompass all power conversion stages from wave to electrical power. Hardware-in-the-loop is used to physically emulate the last power conversion stage from mechanic to electrical power and hence validate the control law and the generator numerical model. The dimensioning methodology for turbines and generators for power optimisation is explained. Eventually, the validated wave-to-wire numerical models of the conventional OWC and the Tupperwave device are used to assess and compare the performances of these two OWC type wave energy device concepts in the same wave climate. The benefits of pneumatic power smoothing by the Tupperwave device are discussed and the required efficiency of the non-return valves is investigated.

Suggested Citation

  • Pierre Benreguig & James Kelly & Vikram Pakrashi & Jimmy Murphy, 2019. "Wave-to-Wire Model Development and Validation for Two OWC Type Wave Energy Converters," Energies, MDPI, vol. 12(20), pages 1-28, October.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:20:p:3977-:d:278182
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    References listed on IDEAS

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    1. Falcão, António F.O. & Henriques, João C.C., 2016. "Oscillating-water-column wave energy converters and air turbines: A review," Renewable Energy, Elsevier, vol. 85(C), pages 1391-1424.
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    Cited by:

    1. Lorenzo Ciappi & Lapo Cheli & Irene Simonetti & Alessandro Bianchini & Giampaolo Manfrida & Lorenzo Cappietti, 2020. "Wave-to-Wire Model of an Oscillating-Water-Column Wave Energy Converter and Its Application to Mediterranean Energy Hot-Spots," Energies, MDPI, vol. 13(21), pages 1-28, October.
    2. Luana Gurnari & Pasquale G. F. Filianoti & Marco Torresi & Sergio M. Camporeale, 2020. "The Wave-to-Wire Energy Conversion Process for a Fixed U-OWC Device," Energies, MDPI, vol. 13(1), pages 1-25, January.
    3. O’Kelly-Lynch, Patrick & Long, Cian & McAuliffe, Fiona Devoy & Murphy, Jimmy & Pakrashi, Vikram, 2020. "Structural design implications of combining a point absorber with a wind turbine monopile for the east and west coast of Ireland," Renewable and Sustainable Energy Reviews, Elsevier, vol. 119(C).

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