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Model tests on a floating coaxial-duct OWC wave energy converter with focus on the spring-like air compressibility effect

Author

Listed:
  • Portillo, J.C.C.
  • Henriques, J.C.C.
  • Gato, L.M.C.
  • Falcão, A.F.O.

Abstract

The spring-like air compressibility effect in oscillating-water-column (OWC) wave energy converters may significantly affect the device’s power performance. Yet, this effect has rarely been accounted for in physical model testing, especially in floating OWCs. Quantifying this effect in the development and analysis of OWCs is crucial for i) making better estimates of their performances and decreasing uncertainties, ii) improving design and testing processes, iii) reducing development costs, and iv) accelerating decision-making on wave energy projects. This paper presents experimental results of a floating coaxial-duct OWC at 1:40-scale. The experimental campaign comprised tests in which the Froude scale was applied to the whole converter structure and, for comparison, tests where the air chamber volume was expanded to comply with the aero-thermodynamic similitude. Tests included regular and irregular waves and various damping conditions. Experimental results show that compressibility effects can increase, decrease, or have neutral contributions to the mean absorbed power, depending on wave frequency. Another effect is the presence of reactive power. The capture width ratio is higher for the compressible experimental configuration in several cases. A new compressibility factor is proposed to aid in designing experimental and numerical campaigns.

Suggested Citation

  • 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).
    • Handle: RePEc:eee:energy:v:263:y:2023:i:pa:s0360544222024355
    DOI: 10.1016/j.energy.2022.125549
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    References listed on IDEAS

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    1. Sheng, Wanan, 2019. "Power performance of BBDB OWC wave energy converters," Renewable Energy, Elsevier, vol. 132(C), pages 709-722.
    2. Scialò, A. & Henriques, J.C.C. & Malara, G. & Falcão, A.F.O. & Gato, L.M.C. & Arena, F., 2021. "Power take-off selection for a fixed U-OWC wave power plant in the Mediterranean Sea: The case of Roccella Jonica," Energy, Elsevier, vol. 215(PA).
    3. Liu, Zhen & Xu, Chuanli & Kim, Kilwon & Choi, Jongsu & Hyun, Beom-soo, 2021. "An integrated numerical model for the chamber-turbine system of an oscillating water column wave energy converter," Renewable and Sustainable Energy Reviews, Elsevier, vol. 149(C).
    4. 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.
    5. 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.
    6. Fox, Brooklyn N. & Gomes, Rui P.F. & Gato, Luís M.C., 2021. "Analysis of oscillating-water-column wave energy converter configurations for integration into caisson breakwaters," Applied Energy, Elsevier, vol. 295(C).
    7. López, I. & Carballo, R. & Taveira-Pinto, F. & Iglesias, G., 2020. "Sensitivity of OWC performance to air compressibility," Renewable Energy, Elsevier, vol. 145(C), pages 1334-1347.
    8. Henriques, J.C.C. & Portillo, J.C.C. & Gato, L.M.C. & Gomes, R.P.F. & Ferreira, D.N. & Falcão, A.F.O., 2016. "Design of oscillating-water-column wave energy converters with an application to self-powered sensor buoys," Energy, Elsevier, vol. 112(C), pages 852-867.
    9. López, Iraide & Andreu, Jon & Ceballos, Salvador & Martínez de Alegría, Iñigo & Kortabarria, Iñigo, 2013. "Review of wave energy technologies and the necessary power-equipment," Renewable and Sustainable Energy Reviews, Elsevier, vol. 27(C), pages 413-434.
    10. 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.
    11. Ferreira, D.N. & Gato, L.M.C. & Eça, L. & Henriques, J.C.C., 2020. "Aerodynamic analysis of a biradial turbine with movable guide-vanes: Incidence and slip effects on efficiency," Energy, Elsevier, vol. 200(C).
    12. 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).
    13. Falcão, António F.O. & Gato, Luís M.C. & Henriques, João C.C. & Borges, João E. & Pereiras, Bruno & Castro, Francisco, 2015. "A novel twin-rotor radial-inflow air turbine for oscillating-water-column wave energy converters," Energy, Elsevier, vol. 93(P2), pages 2116-2125.
    14. Henriques, J.C.C. & Portillo, J.C.C. & Sheng, W. & Gato, L.M.C. & Falcão, A.F.O., 2019. "Dynamics and control of air turbines in oscillating-water-column wave energy converters: Analyses and case study," Renewable and Sustainable Energy Reviews, Elsevier, vol. 112(C), pages 571-589.
    15. 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.
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