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High conversion efficiency of oscillating-buoy WEC with pneumatic PTO: Principle analysis and experimental verification

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  • Rao, Xiang
  • Wu, Bijun
  • Liu, Peiyu
  • Zhang, Fuming
  • Yuan, Zhiwen

Abstract

This study is grounded in the fundamental properties of wave diffraction and the law of energy conservation, to establish a conversion system for four distinct wave energy conversion systems. Through both qualitative and quantitative analyses, it elucidates why the oscillating-buoy wave energy conversion system achieves superior overall conversion efficiency. In response, the physical model of this type of this system was designed, optimized and experimentally validated. Wide wave tank tests showed a capture width ratio (CWR) reached a peak value of 252.6 %, with an overall conversion efficiency of 77.1 %, highlighting a significant improvement in the wave energy conversion performance. Through principal analysis and experimental tests, it is indicated that this new technology serves as a crucial pathway to address issues such as poor survivability, low reliability, and low conversion efficiency.

Suggested Citation

  • Rao, Xiang & Wu, Bijun & Liu, Peiyu & Zhang, Fuming & Yuan, Zhiwen, 2025. "High conversion efficiency of oscillating-buoy WEC with pneumatic PTO: Principle analysis and experimental verification," Renewable Energy, Elsevier, vol. 252(C).
    • Handle: RePEc:eee:renene:v:252:y:2025:i:c:s0960148125010468
    DOI: 10.1016/j.renene.2025.123384
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