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Evaluation of air compressibility effects on the performance of fixed OWC wave energy converters using CFD modelling

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  • Simonetti, I.
  • Cappietti, L.
  • Elsafti, H.
  • Oumeraci, H.

Abstract

This study presents an evaluation of the error induced by neglecting the effect of air compressibility in modelling Oscillating Water Column (OWC) wave energy converters. A compressible two phases CFD model in the open-source software package OpenFOAM® is validated and then used to simulate a fixed OWC device, detached from the sea bottom. A comparative analysis of the results obtained by simulating the device at full-scale (1:1) and at four smaller scales (1:50, 1:25, 1:10 and 1:5) is performed in order to assess the scale effects associated with air compressibility. Indeed, for the air pressure levels considered in the simulations (up to 350 Pa at model scale 1:50), the effect of neglecting the air compressibility results in an overestimation up to about 15% for the air pressure in the OWC chamber and the subsequent air volume flux, but less than 10% for the capture width ratio. This overestimation increases with increasing pressure level. Results are analysed in terms of dimensionless parameters and a new parameter, strongly related to the compressible effects, is proposed and used to provide generalized equations delivering correction factors.

Suggested Citation

  • Simonetti, I. & Cappietti, L. & Elsafti, H. & Oumeraci, H., 2018. "Evaluation of air compressibility effects on the performance of fixed OWC wave energy converters using CFD modelling," Renewable Energy, Elsevier, vol. 119(C), pages 741-753.
    • Handle: RePEc:eee:renene:v:119:y:2018:i:c:p:741-753
    DOI: 10.1016/j.renene.2017.12.027
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    References listed on IDEAS

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    1. López, I. & Pereiras, B. & Castro, F. & Iglesias, G., 2016. "Holistic performance analysis and turbine-induced damping for an OWC wave energy converter," Renewable Energy, Elsevier, vol. 85(C), pages 1155-1163.
    2. López, I. & Pereiras, B. & Castro, F. & Iglesias, G., 2014. "Optimisation of turbine-induced damping for an OWC wave energy converter using a RANS–VOF numerical model," Applied Energy, Elsevier, vol. 127(C), pages 105-114.
    3. 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.
    4. Elhanafi, Ahmed & Fleming, Alan & Macfarlane, Gregor & Leong, Zhi, 2017. "Underwater geometrical impact on the hydrodynamic performance of an offshore oscillating water column–wave energy converter," Renewable Energy, Elsevier, vol. 105(C), pages 209-231.
    5. Gomes, R.P.F. & Henriques, J.C.C. & Gato, L.M.C. & Falcão, A.F.O., 2012. "Hydrodynamic optimization of an axisymmetric floating oscillating water column for wave energy conversion," Renewable Energy, Elsevier, vol. 44(C), pages 328-339.
    6. Simonetti, I. & Cappietti, L. & Elsafti, H. & Oumeraci, H., 2017. "Optimization of the geometry and the turbine induced damping for fixed detached and asymmetric OWC devices: A numerical study," Energy, Elsevier, vol. 139(C), pages 1197-1209.
    7. Zhang, Yali & Zou, Qing-Ping & Greaves, Deborah, 2012. "Air–water two-phase flow modelling of hydrodynamic performance of an oscillating water column device," Renewable Energy, Elsevier, vol. 41(C), pages 159-170.
    8. Nunes, Guilherme & Valério, Duarte & Beirão, Pedro & Sá da Costa, José, 2011. "Modelling and control of a wave energy converter," Renewable Energy, Elsevier, vol. 36(7), pages 1913-1921.
    9. Falcão, António F.O. & Henriques, João C.C. & Cândido, José J., 2012. "Dynamics and optimization of the OWC spar buoy wave energy converter," Renewable Energy, Elsevier, vol. 48(C), pages 369-381.
    10. Vyzikas, Thomas & Deshoulières, Samy & Giroux, Olivier & Barton, Matthew & Greaves, Deborah, 2017. "Numerical study of fixed Oscillating Water Column with RANS-type two-phase CFD model," Renewable Energy, Elsevier, vol. 102(PB), pages 294-305.
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