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Hydrodynamic characteristics of hybrid immersed dual-buoy WEC integrated with Jarlan-type breakwater

Author

Listed:
  • Yang, Can
  • Yu, Jinshuo
  • Lu, Zhenye
  • Chen, Hailong
  • Ma, Gang
  • Johanning, Lars

Abstract

A semi-analytical model for a wave energy extraction system integrating a floating-submerged dual-buoy WEC device with a Jarlan-type breakwater is proposed, and a comparison is conducted with a traditional breakwater-WEC device, highlighting the advantages of the hybrid system. The model was established using the method of separation of variables and the matched eigenfunction expansion method, and was validated through energy conservation, convergence checks, and comparison with previous results. The study determines the required restoring stiffness for the underwater buoy to prevent collisions with the floating buoy. It also analyzes the energy conversion and wave resonance within the device. The results indicate that reducing the thickness and increasing the draft of the submerged body, while decreasing the draft of the floating body, enhances the system's energy capture efficiency. Water wave resonance between the device and the coastal wall improves this efficiency. However, when the device is positioned at the nodes of standing waves formed by coastal reflection, the efficiency drops to zero. Placing a perforated wall between the floaters and the coastal wall can reduce the horizontal wave loads on the floaters by up to 60%. Meanwhile, the maximum energy capture efficiency of the system consistently remains above 0.85.

Suggested Citation

  • Yang, Can & Yu, Jinshuo & Lu, Zhenye & Chen, Hailong & Ma, Gang & Johanning, Lars, 2026. "Hydrodynamic characteristics of hybrid immersed dual-buoy WEC integrated with Jarlan-type breakwater," Energy, Elsevier, vol. 347(C).
    • Handle: RePEc:eee:energy:v:347:y:2026:i:c:s0360544226006043
    DOI: 10.1016/j.energy.2026.140501
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