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Layout optimization of wave energy converter arrays consisting of floating truncated cylinders with five degrees of freedom in regular and irregular waves

Author

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  • Kang, Yuanshun
  • Zeng, Xiaohui
  • Cui, Zhehua
  • Chen, Jiahao

Abstract

This paper develops a new oscillating buoy type wave energy converter, named 5-DOF WEC, which oscillates and extracts energy with five degrees of freedom (DOF) by setting the power take-off (PTO) system in each direction. Compared with the 1-DOF WEC, which only oscillates and extracts energy in the heave direction, the 5-DOF WEC can greatly enhance the energy extraction efficiency of the arrays, particularly in the high-frequency region. The performance of the WEC array is highly dependent on the geometric dimensions, PTO characteristics, and spatial position of each buoy. For the different incident angles and cylinder spacings, the energy extraction performances of the WEC array in regular and irregular waves are examined. The optimal layouts of the 5-DOF WEC arrays under the action of regular waves are given using the multi-level optimization method proposed by Kang et al. (2024) [1]. Then, the layout optimization problems of 1-DOF and 5-DOF WEC arrays in unidirectional irregular waves and multidirectional real wave scenarios are investigated. The results show that arranging the array linearly and perpendicular to the wave propagation direction has higher energy capture performance in unidirectional irregular waves and multidirectional real wave scenarios.

Suggested Citation

  • Kang, Yuanshun & Zeng, Xiaohui & Cui, Zhehua & Chen, Jiahao, 2026. "Layout optimization of wave energy converter arrays consisting of floating truncated cylinders with five degrees of freedom in regular and irregular waves," Renewable Energy, Elsevier, vol. 260(C).
    • Handle: RePEc:eee:renene:v:260:y:2026:i:c:s0960148126000285
    DOI: 10.1016/j.renene.2026.125203
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