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Backward bent-duct buoy or frontward bent-duct buoy? Review, assessment and optimisation

Author

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  • Portillo, J.C.C.
  • Reis, P.F.
  • Henriques, J.C.C.
  • Gato, L.M.C.
  • Falcão, A.F.O.

Abstract

This work focuses on the investigation of bent-duct buoy oscillating-water-column (OWC) wave energy converters (WEC), which have been generally studied in their backward configuration (BBDB). This work studies both backward and frontward configurations through systematic phases starting from a reference model of a BBDB OWC WEC. Firstly, an appropriate numerical model is defined to assess the performance of BBDBs equipped with linear turbines. Secondly, having variations from the reference model, a parametric sensitivity analysis is carried out to study the influence of the main geometric variables, when designing a bent-duct buoy in both backward and frontward configurations. Results show a better performance of frontward configurations in most cases. Afterwards, an optimisation study is performed for a specific site. Results confirmed that the frontward configuration for the optimised geometry outperformed the backward configuration, and the selected geometry also performs better than the original reference at the site selected. Finally, a techno-economic assessment is carried out for the reference BBDB and for the optimised bent-duct buoy. Despite the substantial increase in annual mean power output, results confirm that the wave commercial projects are not economically feasible under current assumptions. This requires more efforts from developers and from regulators/policy makers to develop mechanisms to promote wave energy projects.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:rensus:v:112:y:2019:i:c:p:353-368
    DOI: 10.1016/j.rser.2019.05.026
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    References listed on IDEAS

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    Cited by:

    1. Mayon, Robert & Ning, Dezhi & Zhang, Chongwei & Chen, Lifen & Wang, Rongquan, 2021. "Wave energy capture by an omnidirectional point sink oscillating water column system," Applied Energy, Elsevier, vol. 304(C).
    2. 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).
    3. Domenico Curto & Vincenzo Franzitta & Andrea Guercio, 2021. "Sea Wave Energy. A Review of the Current Technologies and Perspectives," Energies, MDPI, vol. 14(20), pages 1-31, October.
    4. Guo, Bingyong & Ringwood, John V., 2021. "Geometric optimisation of wave energy conversion devices: A survey," Applied Energy, Elsevier, vol. 297(C).
    5. Carrelhas, A.A.D. & Gato, L.M.C. & Henriques, J.C.C., 2023. "Peak shaving control in OWC wave energy converters: From concept to implementation in the Mutriku wave power plant," Renewable and Sustainable Energy Reviews, Elsevier, vol. 180(C).
    6. Morais, F.J.F. & Carrelhas, A.A.D. & Gato, L.M.C., 2023. "Biplane-rotor Wells turbine: The influence of solidity, presence of guide vanes and comparison with other configurations," Energy, Elsevier, vol. 276(C).
    7. Portillo, J.C.C. & Henriques, J.C.C. & Gato, L.M.C. & Falcão, A.F.O., 2023. "Model tests on a floating coaxial-duct OWC wave energy converter with focus on the spring-like air compressibility effect," Energy, Elsevier, vol. 263(PA).

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