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Model testing of an oscillating water column spar-buoy wave energy converter isolated and in array: Motions and mooring forces

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  • Correia da Fonseca, F.X.
  • Gomes, R.P.F.
  • Henriques, J.C.C.
  • Gato, L.M.C.
  • Falcão, A.F.O.

Abstract

For large-scale exploitation of the offshore wave energy resource, floating wave energy converters should be deployed in arrays with inter-body mooring connections, reducing the number of bottom slack-mooring lines needed and consequently the project total cost. The present paper concerns the experimental investigation of the dynamics, energy extraction and mooring system performance of the OWC spar-buoy, deployed isolated and in a triangular array configuration, with inter-body mooring connections. For this purpose, three 1:32 scale models of the device were built and tested at Plymouth University large ocean basin. Pressure variations inside the OWC air chamber, mooring line forces in the buoy fairleads and buoys motion were measured. The turbine damping effect was simulated using a calibrated orifice fixed at the top of the air chamber. Tests were carried out for regular and irregular wave conditions with different wave heights and periods. Several model configurations were tested, including the variation of the mooring lines pre-tension, the structure ballast and the turbine damping. The closure of the air chamber, for turbine protection purposes, was found to be correlated with a large increase of the mooring loads. Results show a comparable performance between the three-device array and isolated device configuration.

Suggested Citation

  • Correia da Fonseca, F.X. & Gomes, R.P.F. & Henriques, J.C.C. & Gato, L.M.C. & Falcão, A.F.O., 2016. "Model testing of an oscillating water column spar-buoy wave energy converter isolated and in array: Motions and mooring forces," Energy, Elsevier, vol. 112(C), pages 1207-1218.
    • Handle: RePEc:eee:energy:v:112:y:2016:i:c:p:1207-1218
    DOI: 10.1016/j.energy.2016.07.007
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    References listed on IDEAS

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    Cited by:

    1. Zabala, I. & Henriques, J.C.C. & Blanco, J.M. & Gomez, A. & Gato, L.M.C. & Bidaguren, I. & Falcão, A.F.O. & Amezaga, A. & Gomes, R.P.F., 2019. "Wave-induced real-fluid effects in marine energy converters: Review and application to OWC devices," Renewable and Sustainable Energy Reviews, Elsevier, vol. 111(C), pages 535-549.
    2. 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).
    3. Oikonomou, Charikleia L.G. & Gomes, Rui P.F. & Gato, Luís M.C., 2021. "Unveiling the potential of using a spar-buoy oscillating-water-column wave energy converter for low-power stand-alone applications," Applied Energy, Elsevier, vol. 292(C).
    4. Giorgi, Giuseppe & Gomes, Rui P.F. & Henriques, João C.C. & Gato, Luís M.C. & Bracco, Giovanni & Mattiazzo, Giuliana, 2020. "Detecting parametric resonance in a floating oscillating water column device for wave energy conversion: Numerical simulations and validation with physical model tests," Applied Energy, Elsevier, vol. 276(C).
    5. Gradowski, M. & Gomes, R.P.F. & Alves, M., 2020. "Hydrodynamic optimisation of an axisymmetric floating Oscillating Water Column type wave energy converter with an enlarged inner tube," Renewable Energy, Elsevier, vol. 162(C), pages 1519-1532.
    6. Ning, De-zhi & Zhou, Yu & Mayon, Robert & Johanning, Lars, 2020. "Experimental investigation on the hydrodynamic performance of a cylindrical dual-chamber Oscillating Water Column device," Applied Energy, Elsevier, vol. 260(C).
    7. Gomes, Rui P.F. & Gato, Luís M.C. & Henriques, João C.C. & Portillo, Juan C.C. & Howey, Ben D. & Collins, Keri M. & Hann, Martyn R. & Greaves, Deborah M., 2020. "Compact floating wave energy converters arrays: Mooring loads and survivability through scale physical modelling," Applied Energy, Elsevier, vol. 280(C).
    8. Portillo, J.C.C. & Collins, K.M. & Gomes, R.P.F. & Henriques, J.C.C. & Gato, L.M.C. & Howey, B.D. & Hann, M.R. & Greaves, D.M. & Falcão, A.F.O., 2020. "Wave energy converter physical model design and testing: The case of floating oscillating-water-columns," Applied Energy, Elsevier, vol. 278(C).
    9. Xu, Sheng & Wang, Shan & Guedes Soares, C., 2020. "Experimental investigation on hybrid mooring systems for wave energy converters," Renewable Energy, Elsevier, vol. 158(C), pages 130-153.
    10. Liu, Zhen & Xu, Chuanli & Qu, Na & Cui, Ying & Kim, Kilwon, 2020. "Overall performance evaluation of a model-scale OWC wave energy converter," Renewable Energy, Elsevier, vol. 149(C), pages 1325-1338.
    11. Oikonomou, C.L.G. & Gomes, R.P.F. & Gato, L.M.C. & Falcão, A.F.O., 2020. "On the dynamics of an array of spar-buoy oscillating water column devices with inter-body mooring connections," Renewable Energy, Elsevier, vol. 148(C), pages 309-325.
    12. Correia da Fonseca, F.X. & Henriques, J.C.C. & Gato, L.M.C. & Falcão, A.F.O., 2019. "Oscillating flow rig for air turbine testing," Renewable Energy, Elsevier, vol. 142(C), pages 373-382.
    13. Yin, Xiuxing & Zhao, Xiaowei & Zhang, Wencan, 2018. "A novel hydro-kite like energy converter for harnessing both ocean wave and current energy," Energy, Elsevier, vol. 158(C), pages 1204-1212.
    14. Minghao Wu & Vasiliki Stratigaki & Peter Troch & Corrado Altomare & Tim Verbrugghe & Alejandro Crespo & Lorenzo Cappietti & Matthew Hall & Moncho Gómez-Gesteira, 2019. "Experimental Study of a Moored Floating Oscillating Water Column Wave-Energy Converter and of a Moored Cubic Box," Energies, MDPI, vol. 12(10), pages 1-20, May.

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