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Enhancing energy capture: single- and dual-chamber oscillating water column devices under converging waves
Yu Zhou1,2,3, Zhigao Wang4,5, Jing Geng4,5
1College of Shipbuilding Engineering, Harbin Engineering University, Harbin, China. yu_zhou@hrbeu.edu.cn.
Communications Engineering
|January 10, 2026
Summary
Researchers designed enhanced Oscillating Water Column (OWC) chambers to capture energy from focused waves. Novel designs achieved significantly higher power absorption, offering practical guidance for wave energy devices.
Area of Science:
- Ocean Engineering
- Renewable Energy Technologies
- Fluid Dynamics
Background:
- Parabolic coastal structures concentrate wave energy, creating high-potential zones for capture.
- Efficiently harvesting this concentrated wave energy remains a significant challenge.
Purpose of the Study:
- To propose and evaluate novel single- and dual-chamber Oscillating Water Column (OWC) designs for enhanced wave energy capture in focused wave environments.
- To provide practical design guidance for optimizing wave energy converters (WECs) in parabolic focusing conditions.
Main Methods:
- Utilized a time-domain higher-order boundary element method based on nonlinear potential flow theory.
- Coupled the hydrodynamic model with a nonlinear pneumatic model, calibrated through geometric scaling and focused-wave tests.
- Simulated OWC performance under parabolic wave focusing conditions.
Main Results:
- A bimodal resonance in parabolic focusing led to peak power absorption up to 17 times that of an isolated device.
- A leeward perforation design increased the single-chamber capture ratio to 25 times the baseline.
- A dual-chamber configuration with an added semicircular chamber enhanced total absorbed energy and widened the operational bandwidth.
Conclusions:
- The proposed OWC chamber designs significantly enhance wave energy capture efficiency in focused wave environments.
- Geometric modifications and dual-chamber configurations offer practical pathways to boost power output and broaden the effective bandwidth of WECs.
- This research provides valuable insights for the development of efficient wave energy conversion systems operating in complex wave conditions.
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