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Experimental Research on Primary and Secondary Conversion Efficiencies in an Oscillating Water Column-Type Wave Energy Converter

Author

Listed:
  • Tengen Murakami

    (Institute of Ocean Energy, Saga University, 1, Honjo, 840-8502 Saga, Japan)

  • Yasutaka Imai

    (Institute of Ocean Energy, Saga University, 1, Honjo, 840-8502 Saga, Japan)

  • Shuichi Nagata

    (Institute of Ocean Energy, Saga University, 1, Honjo, 840-8502 Saga, Japan)

  • Manabu Takao

    (Department of Mechanical Engineering, Matsue National College of Technology, 14-4, Nishiikuma, Matsue, 690-8518 Shimane, Japan)

  • Toshiaki Setoguchi

    (Institute of Ocean Energy, Saga University, 1, Honjo, 840-8502 Saga, Japan)

Abstract

For the practical application of a fixed oscillating water column (OWC)-type wave energy converter, it is necessary to develop a design method which can consider the characteristics of incident wave motion, the motion of the internal free surface affected in the structure such as a partly submerged wall, the fluctuation of air pressure in an air chamber, and the rotation of the air turbine. On the other hand, the impulse turbine as the secondary conversion device in the OWC unit is expected to achieve high efficiency. In this paper, firstly, the steady air flow tests for a single-impulse turbine were conducted to grasp the characteristics of the turbine without the effect of water waves. Secondly, the 2-dimensional wave tank tests in regular waves for the performance evaluation of the fixed OWC-type wave energy converter with the same impulse turbine were conducted to obtain the data needed to make this design method. As the results, the effects of the air chamber length and the guide vane’s setting angle on the primary and secondary conversion efficiencies are clarified experimentally.

Suggested Citation

  • Tengen Murakami & Yasutaka Imai & Shuichi Nagata & Manabu Takao & Toshiaki Setoguchi, 2016. "Experimental Research on Primary and Secondary Conversion Efficiencies in an Oscillating Water Column-Type Wave Energy Converter," Sustainability, MDPI, vol. 8(8), pages 1-11, August.
    • Handle: RePEc:gam:jsusta:v:8:y:2016:i:8:p:756-:d:75432
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    References listed on IDEAS

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    1. Henriques, J.C.C. & Gomes, R.P.F. & Gato, L.M.C. & Falcão, A.F.O. & Robles, E. & Ceballos, S., 2016. "Testing and control of a power take-off system for an oscillating-water-column wave energy converter," Renewable Energy, Elsevier, vol. 85(C), pages 714-724.
    2. 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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    4. Diego Vicinanza & Lucia Margheritini & Jens Peter Kofoed & Mariano Buccino, 2012. "The SSG Wave Energy Converter: Performance, Status and Recent Developments," Energies, MDPI, vol. 5(2), pages 1-34, January.
    5. Ning, De-Zhi & Wang, Rong-Quan & Zou, Qing-Ping & Teng, Bin, 2016. "An experimental investigation of hydrodynamics of a fixed OWC Wave Energy Converter," Applied Energy, Elsevier, vol. 168(C), pages 636-648.
    6. Setoguchi, T & Santhakumar, S & Maeda, H & Takao, M & Kaneko, K, 2001. "A review of impulse turbines for wave energy conversion," Renewable Energy, Elsevier, vol. 23(2), pages 261-292.
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    Cited by:

    1. Diego Vicinanza & Mariano Buccino, 2017. "A Helicopter View of the Special Issue on Wave Energy Converters," Sustainability, MDPI, vol. 9(2), pages 1-4, February.
    2. Dezhi Ning & Rongquan Wang & Chongwei Zhang, 2017. "Numerical Simulation of a Dual-Chamber Oscillating Water Column Wave Energy Converter," Sustainability, MDPI, vol. 9(9), pages 1-12, September.

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