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A novel radial self-rectifying air turbine for use in wave energy converters. Part 2. Results from model testing

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  • Falcão, A.F.O.
  • Gato, L.M.C.
  • Nunes, E.P.A.S.

Abstract

The paper presents results from model testing of a self-rectifying radial-flow air turbine, that is being developed as an alternative to the axial-flow self-rectifying turbines for applications in wave energy conversion. In the new machine, named biradial turbine, the flow into, and out of, the rotor is radial. The rotor is surrounded by a pair of radial-flow guide-vane rows. The downstream guide vanes are prevented from obstructing the flow coming out of the rotor by axially displacing the whole guide vane set. The turbine model, with a 0.488 m diameter rotor, was tested in unidirectional flow. Experimental results are shown, in dimensionless form, for efficiency, power and pressure head versus flow rate. They are compared with predictions from CFD computations. The results from model testing were used to estimate the time-averaged efficiency of the turbine subject to the irregular bidirectional air flow induced by random waves.

Suggested Citation

  • Falcão, A.F.O. & Gato, L.M.C. & Nunes, E.P.A.S., 2013. "A novel radial self-rectifying air turbine for use in wave energy converters. Part 2. Results from model testing," Renewable Energy, Elsevier, vol. 53(C), pages 159-164.
    • Handle: RePEc:eee:renene:v:53:y:2013:i:c:p:159-164
    DOI: 10.1016/j.renene.2012.11.018
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    References listed on IDEAS

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    1. Setoguchi, T & Santhakumar, S & Maeda, H & Takao, M & Kaneko, K, 2001. "A review of impulse turbines for wave energy conversion," Renewable Energy, Elsevier, vol. 23(2), pages 261-292.
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    1. Hui Zhang & Wanan Sheng & Zhimin Zha & George Aggidis, 2022. "A Preliminary Study on Identifying Biomimetic Entities for Generating Novel Wave Energy Converters," Energies, MDPI, vol. 15(7), pages 1-20, March.
    2. Carrelhas, A.A.D. & Gato, L.M.C. & Henriques, J.C.C. & Falcão, A.F.O. & Varandas, J., 2019. "Test results of a 30 kW self-rectifying biradial air turbine-generator prototype," Renewable and Sustainable Energy Reviews, Elsevier, vol. 109(C), pages 187-198.
    3. Henriques, J.C.C. & Gato, L.M.C. & Falcão, A.F.O. & Robles, E. & Faÿ, F.-X., 2016. "Latching control of a floating oscillating-water-column wave energy converter," Renewable Energy, Elsevier, vol. 90(C), pages 229-241.
    4. 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.
    5. 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.
    6. 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.
    7. Tomás Cabral & Daniel Clemente & Paulo Rosa-Santos & Francisco Taveira-Pinto & Tiago Morais & Filipe Belga & Henrique Cestaro, 2020. "Performance Assessment of a Hybrid Wave Energy Converter Integrated into a Harbor Breakwater," Energies, MDPI, vol. 13(1), pages 1-22, January.
    8. Kostas Belibassakis & Alexandros Magkouris & Eugen Rusu, 2020. "A BEM for the Hydrodynamic Analysis of Oscillating Water Column Systems in Variable Bathymetry," Energies, MDPI, vol. 13(13), pages 1-24, July.
    9. Ansarifard, Nazanin & Kianejad, S.S. & Fleming, Alan & Henderson, Alan & Chai, Shuhong, 2020. "Design optimization of a purely radial turbine for operation in the inhalation mode of an oscillating water column," Renewable Energy, Elsevier, vol. 152(C), pages 540-556.
    10. 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).
    11. Henriques, J.C.C. & Gomes, R.P.F. & Gato, L.M.C. & Falcão, A.F.O. & Robles, E. & Ceballos, S., 2016. "Testing and control of a power take-off system for an oscillating-water-column wave energy converter," Renewable Energy, Elsevier, vol. 85(C), pages 714-724.
    12. Nazanin Ansarifard & Alan Fleming & Alan Henderson & S.S. Kianejad & Shuhong Chai, 2019. "Design Optimisation of a Unidirectional Centrifugal Radial-Air-Turbine for Application in OWC Wave Energy Converters," Energies, MDPI, vol. 12(14), pages 1-22, July.
    13. Henriques, J.C.C. & Gato, L.M.C. & Lemos, J.M. & Gomes, R.P.F. & Falcão, A.F.O., 2016. "Peak-power control of a grid-integrated oscillating water column wave energy converter," Energy, Elsevier, vol. 109(C), pages 378-390.
    14. Moisel, Christoph & Carolus, Thomas H., 2016. "A facility for testing the aerodynamic and acoustic performance of bidirectional air turbines for ocean wave energy conversion," Renewable Energy, Elsevier, vol. 86(C), pages 1340-1352.
    15. Carrelhas, A.A.D. & Gato, L.M.C. & Henriques, J.C.C. & Falcão, A.F.O., 2020. "Experimental study of a self-rectifying biradial air turbine with fixed guide-vanes arranged into two concentric annular rows," Energy, Elsevier, vol. 198(C).
    16. Calheiros-Cabral, Tomás & Clemente, Daniel & Rosa-Santos, Paulo & Taveira-Pinto, Francisco & Ramos, Victor & Morais, Tiago & Cestaro, Henrique, 2020. "Evaluation of the annual electricity production of a hybrid breakwater-integrated wave energy converter," Energy, Elsevier, vol. 213(C).
    17. Pierre Benreguig & James Kelly & Vikram Pakrashi & Jimmy Murphy, 2019. "Wave-to-Wire Model Development and Validation for Two OWC Type Wave Energy Converters," Energies, MDPI, vol. 12(20), pages 1-28, October.
    18. Gato, L.M.C. & Maduro, A.R. & Carrelhas, A.A.D. & Henriques, J.C.C. & Ferreira, D.N., 2021. "Performance improvement of the biradial self-rectifying impulse air-turbine for wave energy conversion by multi-row guide vanes: Design and experimental results," Energy, Elsevier, vol. 216(C).
    19. 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.
    20. Falcão, António F.O. & Henriques, João C.C. & Gato, Luís M.C., 2018. "Self-rectifying air turbines for wave energy conversion: A comparative analysis," Renewable and Sustainable Energy Reviews, Elsevier, vol. 91(C), pages 1231-1241.
    21. Lopes, Bárbara S. & Gato, Luís M.C. & Falcão, António F.O. & Henriques, João C.C., 2019. "Test results of a novel twin-rotor radial inflow self-rectifying air turbine for OWC wave energy converters," Energy, Elsevier, vol. 170(C), pages 869-879.
    22. Erlantz Otaola & Aitor J. Garrido & Jon Lekube & Izaskun Garrido, 2019. "A Comparative Analysis of Self-Rectifying Turbines for the Mutriku Oscillating Water Column Energy Plant," Complexity, Hindawi, vol. 2019, pages 1-14, January.
    23. Xu, Conghao & Huang, Zhenhua, 2018. "A dual-functional wave-power plant for wave-energy extraction and shore protection: A wave-flume study," Applied Energy, Elsevier, vol. 229(C), pages 963-976.

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