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Optimization and parameter influence analysis of heave plate OWC wave energy buoy under broadband wave conditions

Author

Listed:
  • Zhang, Haoran
  • Ren, Xingye
  • Li, Yintao
  • Yang, Shaohui
  • Cao, Wensheng
  • Liu, Wenliang
  • Tu, Yongqiang

Abstract

Heave plate oscillating water column (OWC) wave energy buoys have superior capture width ratio (CWR). However, the influence of structural parameters on CWR under broadband wave conditions has not been clearly revealed. To address this barrier, this study adopts numerical simulation combined with response surface method (RSM) to optimize the CWR for each wave period. The influence of three key geometric parameters on device performance under both broadband wave conditions and three draft depths is investigated. First, the wave conditions and range of design parameters are determined. Secondly, a numerical model is developed and verified through experiment. Then, an optimization workflow is constructed. Lastly, the structure is optimized under broadband wave conditions, with the influence mechanism of structural parameters on CWR clarified. The results show that after optimization, the average CWR under selected wave conditions is improved by 27%, with maximum CWR reaching 59.3%, an increase of 19.3% compared with pre-optimization value. And efficient operating bandwidth is broadened by 116%. A five-stage law of the device's dynamic response evolution with wave periods is revealed, and dominant parameters of each stage are identified. This study provides an effective method for the refined design of broadband adaptive wave energy buoys.

Suggested Citation

  • Zhang, Haoran & Ren, Xingye & Li, Yintao & Yang, Shaohui & Cao, Wensheng & Liu, Wenliang & Tu, Yongqiang, 2026. "Optimization and parameter influence analysis of heave plate OWC wave energy buoy under broadband wave conditions," Energy, Elsevier, vol. 360(C).
    • Handle: RePEc:eee:energy:v:360:y:2026:i:c:s0360544226017743
    DOI: 10.1016/j.energy.2026.141667
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