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Overall performance evaluation of a model-scale OWC wave energy converter

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  • Liu, Zhen
  • Xu, Chuanli
  • Qu, Na
  • Cui, Ying
  • Kim, Kilwon

Abstract

Oscillating water column (OWC) wave energy converters (WECs) have two energy conversion stages. In this study, an axial-flow impulse turbine was installed on an OWC model to replace the traditional substitute, such as the orifice plate. The OWC model was placed in a wave flume for the experimental tests under regular wave conditions. This experimental setup was expected to reflect more actual interactions between two stages at the model-scale level. During the tests, various constant rotation-speeds of the impulse turbine were controlled by a servo motor. The free water-surface elevations at different positions in the OWC model, the air-pressure variations in the chamber, and the torque output of the turbine were recorded. The time histories and phase relationship of typical measured data were analyzed. The primary-stage and secondary-stage efficiencies were calculated under various wave conditions. The overall efficiency of the model peaked at the resonant length ratio of 7.1. All the experimental results can be employed as typical benchmarks for an accurate validation of numerical models.

Suggested Citation

  • Liu, Zhen & Xu, Chuanli & Qu, Na & Cui, Ying & Kim, Kilwon, 2020. "Overall performance evaluation of a model-scale OWC wave energy converter," Renewable Energy, Elsevier, vol. 149(C), pages 1325-1338.
    • Handle: RePEc:eee:renene:v:149:y:2020:i:c:p:1325-1338
    DOI: 10.1016/j.renene.2019.10.126
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    References listed on IDEAS

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    Cited by:

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    2. Ciappi, Lorenzo & Simonetti, Irene & Bianchini, Alessandro & Cappietti, Lorenzo & Manfrida, Giampaolo, 2022. "Application of integrated wave-to-wire modelling for the preliminary design of oscillating water column systems for installations in moderate wave climates," Renewable Energy, Elsevier, vol. 194(C), pages 232-248.
    3. Mia, Mohammad Rashed & Zhao, Ming & Wu, Helen & Munir, Adnan, 2021. "Numerical investigation of scaling effect in two-dimensional oscillating water column wave energy devices for harvesting wave energy," Renewable Energy, Elsevier, vol. 178(C), pages 1381-1397.
    4. Liu, Zhen & Xu, Chuanli & Kim, Kilwon & Choi, Jongsu & Hyun, Beom-soo, 2021. "An integrated numerical model for the chamber-turbine system of an oscillating water column wave energy converter," Renewable and Sustainable Energy Reviews, Elsevier, vol. 149(C).
    5. Molina–Salas, A. & Longo, S. & Clavero, M. & Moñino, A., 2023. "Theoretical approach to the scale effects of an OWC device," Renewable Energy, Elsevier, vol. 219(P2).
    6. Zheng, Siming & Phillips, John Wilfrid & Hann, Martyn & Greaves, Deborah, 2023. "Mathematical modelling of a floating Clam-type wave energy converter," Renewable Energy, Elsevier, vol. 210(C), pages 280-294.
    7. 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.
    8. Kharkeshi, Behrad Alizadeh & Shafaghat, Rouzbeh & Jahanian, Omid & Alamian, Rezvan & Rezanejad, Kourosh, 2022. "Experimental study of an oscillating water column converter to optimize nonlinear PTO using genetic algorithm," Energy, Elsevier, vol. 260(C).
    9. Liu, Zhen & Xu, Chuanli & Zhang, Xiaoxia & Ning, Dezhi, 2023. "Experimental study on an isolated oscillating water column wave energy converting device in oblique waves," Renewable and Sustainable Energy Reviews, Elsevier, vol. 184(C).
    10. Liu, Zhen & Xu, Chuanli & Kim, Kilwon & Li, Ming, 2022. "Experimental study on the overall performance of a model OWC system under the free-spinning mode in irregular waves," Energy, Elsevier, vol. 250(C).

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