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Performance Studies on a Scaled Model of Dual Oscillating-Buoys WEC with One Pneumatic PTO

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  • Peiyu Liu

    (School of Mechanical and Power Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
    Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China)

  • Xiang Rao

    (Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
    College of Energy Science and Technology, University of Science and Technology of China, Hefei 230026, China)

  • Bijun Wu

    (Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
    College of Energy Science and Technology, University of Science and Technology of China, Hefei 230026, China)

  • Zhiwen Yuan

    (Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
    College of Energy Science and Technology, University of Science and Technology of China, Hefei 230026, China)

  • Fuming Zhang

    (Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China)

Abstract

A hybrid wave energy conversion (WEC) system, integrating a backward bent duct buoy (BBDB) with an oscillating buoy (OB) via a flexible mooring chain, is introduced in this study. Unlike existing hybrid WECs, the proposed system dispenses with rigid mechanical linkages and enables flexible offshore deployment. Flared BBDB and buoy models with spherical, cylindrical, and semi-capsule shapes are designed and tested experimentally in a wave flume using both regular and irregular wave conditions. The effects of nozzle ratio (NR), coupling distance, buoy draft, and buoy geometry are systematically examined to investigate the hydrodynamic performance and energy conversion characteristics. It is found that NR at 110 under unidirectional airflow produces an optimal balance between pressure response, free surface displacement, and energy conversion efficiency. Energy extraction is significantly influenced by the coupling distance, with the hybrid system achieving maximum performance at a specific normalized spacing. The semi-capsule buoy improves power extraction ability and expands effective bandwidth due to asymmetric shape and coupled motion. These findings provide valuable insights into the coupling mechanism and geometric optimization for hybrid WECs.

Suggested Citation

  • Peiyu Liu & Xiang Rao & Bijun Wu & Zhiwen Yuan & Fuming Zhang, 2025. "Performance Studies on a Scaled Model of Dual Oscillating-Buoys WEC with One Pneumatic PTO," Energies, MDPI, vol. 18(15), pages 1-21, August.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:15:p:4151-:d:1717981
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    References listed on IDEAS

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    1. Gao, Hong & Xiao, Jie, 2021. "Effects of power take-off parameters and harvester shape on wave energy extraction and output of a hydraulic conversion system," Applied Energy, Elsevier, vol. 299(C).
    2. Liliana Rusu & Eugen Rusu, 2021. "Evaluation of the Worldwide Wave Energy Distribution Based on ERA5 Data and Altimeter Measurements," Energies, MDPI, vol. 14(2), pages 1-16, January.
    3. Sheng, Wanan, 2019. "Power performance of BBDB OWC wave energy converters," Renewable Energy, Elsevier, vol. 132(C), pages 709-722.
    4. Yu Zhou & Chongwei Zhang & Dezhi Ning, 2018. "Hydrodynamic Investigation of a Concentric Cylindrical OWC Wave Energy Converter," Energies, MDPI, vol. 11(4), pages 1-23, April.
    5. Elhanafi, Ahmed & Macfarlane, Gregor & Fleming, Alan & Leong, Zhi, 2017. "Scaling and air compressibility effects on a three-dimensional offshore stationary OWC wave energy converter," Applied Energy, Elsevier, vol. 189(C), pages 1-20.
    6. Majidi, AjabGul & Bingölbali, Bilal & Akpınar, Adem & Iglesias, Gregorio & Jafali, Halid, 2021. "Downscaling wave energy converters for optimum performance in low-energy seas," Renewable Energy, Elsevier, vol. 168(C), pages 705-722.
    7. Liu, Zhen & Zhang, Xiaoxia & Xu, Chuanli, 2023. "Hydrodynamic and energy-harvesting performance of a BBDB-OWC device in irregular waves: An experimental study," Applied Energy, Elsevier, vol. 350(C).
    8. Li, Boyang & Li, Canpeng & Zhang, Baoshou & Deng, Fang & Yang, Hualin, 2023. "The effect of the different spacing ratios on wave energy converter of three floating bodies," Energy, Elsevier, vol. 268(C).
    9. Wu, Bi-jun & Li, Meng & Wu, Ru-kang & Zhang, Yun-qiu & Peng, Wen, 2017. "Experimental study on primary efficiency of a new pentagonal backward bent duct buoy and assessment of prototypes," Renewable Energy, Elsevier, vol. 113(C), pages 774-783.
    10. Wu, Shuping & Liu, Chuanyu & Chen, Xinping, 2015. "Offshore wave energy resource assessment in the East China Sea," Renewable Energy, Elsevier, vol. 76(C), pages 628-636.
    11. Kofoed, Jens Peter & Frigaard, Peter & Friis-Madsen, Erik & Sørensen, Hans Chr., 2006. "Prototype testing of the wave energy converter wave dragon," Renewable Energy, Elsevier, vol. 31(2), pages 181-189.
    12. Berenjkoob, Mahdi Nazari & Ghiasi, Mahmoud & Soares, C.Guedes, 2021. "Influence of the shape of a buoy on the efficiency of its dual-motion wave energy conversion," Energy, Elsevier, vol. 214(C).
    13. Cui, Lin & Zheng, Siming & Zhang, Yongliang & Miles, Jon & Iglesias, Gregorio, 2021. "Wave power extraction from a hybrid oscillating water column-oscillating buoy wave energy converter," Renewable and Sustainable Energy Reviews, Elsevier, vol. 135(C).
    14. Gunn, Kester & Stock-Williams, Clym, 2012. "Quantifying the global wave power resource," Renewable Energy, Elsevier, vol. 44(C), pages 296-304.
    15. Hu, Jianjian & Zhou, Binzhen & Vogel, Christopher & Liu, Pin & Willden, Richard & Sun, Ke & Zang, Jun & Geng, Jing & Jin, Peng & Cui, Lin & Jiang, Bo & Collu, Maurizio, 2020. "Optimal design and performance analysis of a hybrid system combing a floating wind platform and wave energy converters," Applied Energy, Elsevier, vol. 269(C).
    16. Roger Samsó & Júlia Crespin & Antonio García-Olivares & Jordi Solé, 2023. "Examining the Potential of Marine Renewable Energy: A Net Energy Perspective," Sustainability, MDPI, vol. 15(10), pages 1-35, May.
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