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Experimental study on primary efficiency of a new pentagonal backward bent duct buoy and assessment of prototypes

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  • Wu, Bi-jun
  • Li, Meng
  • Wu, Ru-kang
  • Zhang, Yun-qiu
  • Peng, Wen

Abstract

To improve the wave energy conversion efficiency of backward bent duct buoy (BBDB), a pentagonal BBDB model was designed and fabricated for experiments in a wave flume (2D) as well as in a wave basin (3D). Incident wave height, wave period, water elevation in the air chamber and pressure difference between indoor and outdoor of the air chamber were measured. The test results show that the maximum value of capture width ratio (CWR) of the model in the wave flume is about 119.1%, which is much better than the highest value 79.1% obtained under the same experimental conditions in historical documents. Under regular wave, the maximum value of CWR tested in the wave basin is about 146.8%, which is equivalent to the highest value in historical documents and has relatively wide bandwidth. Under irregular waves, the maximum average value of CWR tested in the wave basin is about 87.2%, which is superior to the highest value 52% in historical documents. The combination of experimental results of the model and the latest research achievements of air turbine can help to break the thoughts that wave energy utilization technology can't balance low cost and high efficient conversion.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:renene:v:113:y:2017:i:c:p:774-783
    DOI: 10.1016/j.renene.2017.06.010
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    References listed on IDEAS

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    1. Falcão, António F.O. & Henriques, João C.C., 2016. "Oscillating-water-column wave energy converters and air turbines: A review," Renewable Energy, Elsevier, vol. 85(C), pages 1391-1424.
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    Cited by:

    1. Liu, Zhen & Zhang, Xiaoxia & Xu, Chuanli, 2024. "Experimental study on a back-bent duct buoy oscillating water column device in various degrees of freedom," Renewable Energy, Elsevier, vol. 224(C).
    2. Portillo, J.C.C. & Reis, P.F. & Henriques, J.C.C. & Gato, L.M.C. & Falcão, A.F.O., 2019. "Backward bent-duct buoy or frontward bent-duct buoy? Review, assessment and optimisation," Renewable and Sustainable Energy Reviews, Elsevier, vol. 112(C), pages 353-368.
    3. 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).
    4. Wang, Chen & Zhang, Yongliang & Deng, Zhengzhi, 2022. "A novel dual-chamber oscillating water column system with dual lip-wall pitching motions for wave energy conversion," Energy, Elsevier, vol. 246(C).
    5. Wang, Chen & Zhang, Yongliang & Deng, Zhengzhi, 2021. "Theoretical analysis on hydrodynamic performance for a dual-chamber oscillating water column device with a pitching front lip-wall," Energy, Elsevier, vol. 226(C).
    6. Sheng, Wanan, 2019. "Power performance of BBDB OWC wave energy converters," Renewable Energy, Elsevier, vol. 132(C), pages 709-722.
    7. Ning, De-zhi & Wang, Rong-quan & Chen, Li-fen & Sun, Ke, 2019. "Experimental investigation of a land-based dual-chamber OWC wave energy converter," Renewable and Sustainable Energy Reviews, Elsevier, vol. 105(C), pages 48-60.
    8. Wang, Chen & Zhang, Yongliang & Deng, Zhengzhi, 2022. "Hydrodynamic performance of a heaving oscillating water column device restrained by a spring-damper system," Renewable Energy, Elsevier, vol. 187(C), pages 331-346.
    9. Wang, Chen & Zhang, Yongliang, 2021. "Numerical investigation on the wave power extraction for a 3D dual-chamber oscillating water column system composed of two closely connected circular sub-units," Applied Energy, Elsevier, vol. 295(C).

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