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Effect of relative chamber width on energy conversion and mechanical characteristics of the offshore OWC device: A numerical study

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  • Qu, Ming
  • Yu, Dingyong
  • Li, Yufeng
  • Gao, Zhiyang

Abstract

In order to investigate the effect of the relative width D/D0 on the energy conversion and mechanical characteristics of offshore OWC device, the variation of pressure, air flow and wave force on structure of the offshore OWC chambers with length B = 0.40, 0.45, 0.50 m and D/D0 = 1, 4/5, 2/3, 1/2 were studied under the wave condition of relative wave height H/h = 0.2, incident wave period T = 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1s by numerical simulation. Based on the simulation results, the effects of D/D0 on the parameters of energy conversion, mechanical and hydrodynamic characteristics of the offshore OWC chamber are analyzed. The results show that in most cases, the chambers with D/D0 < 1 have better or similar comprehensive energy conversion-force effect and better force process than the one with D/D0 = 1. The combined effect of the chamber with D/D0 = 4/5 is the best, the wave force on it could be 0.7 times and the energy conversion efficiency could be 1.1 times as compared with that with D/D0 = 1. The research results can provide reference for the design of OWC device.

Suggested Citation

  • Qu, Ming & Yu, Dingyong & Li, Yufeng & Gao, Zhiyang, 2023. "Effect of relative chamber width on energy conversion and mechanical characteristics of the offshore OWC device: A numerical study," Energy, Elsevier, vol. 275(C).
    • Handle: RePEc:eee:energy:v:275:y:2023:i:c:s0360544223007661
    DOI: 10.1016/j.energy.2023.127372
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    References listed on IDEAS

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    1. Qu, Ming & Yu, Dingyong & Xu, Zhigang & Gao, Zhiyang, 2022. "The effect of the elliptical front wall on energy conversion performance of the offshore OWC chamber: A numerical study," Energy, Elsevier, vol. 255(C).
    2. 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).
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    4. Xu, Conghao & Huang, Zhenhua, 2018. "A dual-functional wave-power plant for wave-energy extraction and shore protection: A wave-flume study," Applied Energy, Elsevier, vol. 229(C), pages 963-976.
    5. Simonetti, I. & Cappietti, L. & Elsafti, H. & Oumeraci, H., 2018. "Evaluation of air compressibility effects on the performance of fixed OWC wave energy converters using CFD modelling," Renewable Energy, Elsevier, vol. 119(C), pages 741-753.
    6. 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).
    7. 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.
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