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Article

Model Test and Sea Trial of a Multi-Absorber 1 MW Wave Energy Converter

by
Min Chen
1,2,
Songwei Sheng
1,2,*,
Yaqun Zhang
1,2,
Zhenpeng Wang
1,2,
Kunlin Wang
1,2 and
Jiaqiang Jiang
1,2
1
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
2
Guangdong Provincial Key Laboratory of Renewable Energy, Guangzhou 510640, China
*
Author to whom correspondence should be addressed.
Energies 2025, 18(17), 4711; https://doi.org/10.3390/en18174711
Submission received: 23 July 2025 / Revised: 29 August 2025 / Accepted: 2 September 2025 / Published: 4 September 2025
(This article belongs to the Special Issue Ocean Energy Conversion and Magnetohydrodynamic Power Systems)
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Abstract

An innovative multi-absorber 1 MW wave energy converter (WEC), Nankun, is proposed for efficient wave energy extraction. It comprises a semi-submersible floating platform, a wave energy capture mechanism, a hydraulic energy conversion system, and a mooring system. The WEC operates by converting fluctuating wave power into stable electrical output through a unique sharp eagle-shaped wave absorber coupled with a hydraulic energy conversion module. Scaled model experiments (1:25) demonstrated energy-capture efficiency ranges predominantly between 30% and 50% across 0.8–1.4 s wave periods, with a peak of 56.17%. Analysis of the wave direction effect revealed that the device achieved significantly a higher energy capture at 180 deg compared with 0 deg wave headings, with a relative efficiency ratio of approximately 1.0:0.6~0.8. A full-scale prototype with 10 absorbers was deployed in the South China Sea, achieving grid connection in November 2023. Operational data confirmed viability and generation capacity, with the peak daily output reaching 9850 kWh and a cumulative production of 89,852 kWh over 20 days.
Keywords: wave energy; multi-absorber 1 MW WEC; energy capture efficiency; wave direction effect; model test; sea trial wave energy; multi-absorber 1 MW WEC; energy capture efficiency; wave direction effect; model test; sea trial

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MDPI and ACS Style

Chen, M.; Sheng, S.; Zhang, Y.; Wang, Z.; Wang, K.; Jiang, J. Model Test and Sea Trial of a Multi-Absorber 1 MW Wave Energy Converter. Energies 2025, 18, 4711. https://doi.org/10.3390/en18174711

AMA Style

Chen M, Sheng S, Zhang Y, Wang Z, Wang K, Jiang J. Model Test and Sea Trial of a Multi-Absorber 1 MW Wave Energy Converter. Energies. 2025; 18(17):4711. https://doi.org/10.3390/en18174711

Chicago/Turabian Style

Chen, Min, Songwei Sheng, Yaqun Zhang, Zhenpeng Wang, Kunlin Wang, and Jiaqiang Jiang. 2025. "Model Test and Sea Trial of a Multi-Absorber 1 MW Wave Energy Converter" Energies 18, no. 17: 4711. https://doi.org/10.3390/en18174711

APA Style

Chen, M., Sheng, S., Zhang, Y., Wang, Z., Wang, K., & Jiang, J. (2025). Model Test and Sea Trial of a Multi-Absorber 1 MW Wave Energy Converter. Energies, 18(17), 4711. https://doi.org/10.3390/en18174711

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