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An experimental investigation of the performance of a power transmission mechanism for a flapping-foil hydrokinetic turbine

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  • Kim, Dong-Geon
  • Kim, Jihoon
  • Ko, Jin Hwan

Abstract

In this work, a hydrokinetic turbine that transmits the flapping power of front and rear foils to the final shaft was proposed and verified by conducting experiments in a circulating water tunnel. In particular, a crank-rocker mechanism was adopted for the transmission, with maximum actual power transmission efficiency of 92.1 % achieved, an outcome close to the maximum theoretical power transmission efficiency of 95.3 %. Although apparent negative-torque zones of the rear hydrofoil were observed due to wake effect from the front foil, maximum power efficiency up to 32.1 % was achieved at a reduced frequency of 0.117. Eventually, better transmission performance will be realized by reducing the negative-torque zones and by designing a crank-rocker mechanism with high theoretical power transmission efficiency.

Suggested Citation

  • Kim, Dong-Geon & Kim, Jihoon & Ko, Jin Hwan, 2024. "An experimental investigation of the performance of a power transmission mechanism for a flapping-foil hydrokinetic turbine," Renewable Energy, Elsevier, vol. 237(PA).
    • Handle: RePEc:eee:renene:v:237:y:2024:i:pa:s096014812401704x
    DOI: 10.1016/j.renene.2024.121636
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    References listed on IDEAS

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    1. Khan, M.J. & Bhuyan, G. & Iqbal, M.T. & Quaicoe, J.E., 2009. "Hydrokinetic energy conversion systems and assessment of horizontal and vertical axis turbines for river and tidal applications: A technology status review," Applied Energy, Elsevier, vol. 86(10), pages 1823-1835, October.
    2. Xu, Wenhua & Xu, Guodong & Duan, Wenyang & Song, Zhijie & Lei, Jie, 2019. "Experimental and numerical study of a hydrokinetic turbine based on tandem flapping hydrofoils," Energy, Elsevier, vol. 174(C), pages 375-385.
    3. Ma, Penglei & Wang, Yong & Xie, Yudong & Zhang, Jianhua, 2018. "Analysis of a hydraulic coupling system for dual oscillating foils with a parallel configuration," Energy, Elsevier, vol. 143(C), pages 273-283.
    4. Kim, Jihoon & Kim, Dong-Geon & Jung, Sejin & Moon, Seong Min & Ko, Jin Hwan, 2023. "Experimental study of a fully passive flapping hydrofoil turbine with a dual configuration and a coupling mechanism," Renewable Energy, Elsevier, vol. 208(C), pages 191-202.
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