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Preliminary experimental study on multi-stage gravitational water vortex turbine in a conical basin

Author

Listed:
  • Ullah, Rizwan
  • Cheema, Taqi Ahmad
  • Saleem, Abdul Samad
  • Ahmad, Sarvat Mushtaq
  • Chattha, Javed Ahmad
  • Park, Cheol Woo

Abstract

Gravitational water vortex turbine (GWVT) is an ultra-low head turbine that extracts energy from an artificially induced gravitational water vortex in the basin of cylindrical or conical configuration. The latter type of basin helps in the re-construction of vortex once it is distorted after passing through a runner and thus, provide an additional potential for power extraction at different heights along the basin. In the absence of a detailed experimental study on multi-staging of GWVT in a conical basin, a preliminary investigation has been carried out using runners of Savonius type blades and producing power independently because of telescopic shafts arrangement. The effects of crucial design parameters such as rotor diameter to basin diameter ratio (RB), vortex-blade interaction, the position of the various stages and the offset distance between the neighboring stages, on the performance of GWVT are reported. In addition, the performance parameters which include rotational speed, torque and power are investigated under various rotor submergence conditions; thus, revealing maximum performance for a brimming vortex-blade interaction. One of the key findings of the study is the complex transfer of energy between the two neighboring stages through the vortex flow without the physical contact of rotors. Moreover, multi-staging provides more power than single-stage GWVT by strengthening the vortex in the vicinity of each other through rigid body rotation of the neighboring runners. The outcomes of the present study make it a potential benchmark for the future generations of GWVT technology.

Suggested Citation

  • Ullah, Rizwan & Cheema, Taqi Ahmad & Saleem, Abdul Samad & Ahmad, Sarvat Mushtaq & Chattha, Javed Ahmad & Park, Cheol Woo, 2020. "Preliminary experimental study on multi-stage gravitational water vortex turbine in a conical basin," Renewable Energy, Elsevier, vol. 145(C), pages 2516-2529.
    • Handle: RePEc:eee:renene:v:145:y:2020:i:c:p:2516-2529
    DOI: 10.1016/j.renene.2019.07.128
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    Citations

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    Cited by:

    1. Saleem, Abdul Samad & Cheema, Taqi Ahmad & Ullah, Rizwan & Ahmad, Sarvat Mushtaq & Chattha, Javed Ahmad & Akbar, Bilal & Park, Cheol Woo, 2020. "Parametric study of single-stage gravitational water vortex turbine with cylindrical basin," Energy, Elsevier, vol. 200(C).
    2. Piyawat Sritram & Ratchaphon Suntivarakorn, 2021. "The Efficiency Comparison of Hydro Turbines for Micro Power Plant from Free Vortex," Energies, MDPI, vol. 14(23), pages 1-13, November.
    3. Velásquez, Laura & Posada, Alejandro & Chica, Edwin, 2022. "Optimization of the basin and inlet channel of a gravitational water vortex hydraulic turbine using the response surface methodology," Renewable Energy, Elsevier, vol. 187(C), pages 508-521.
    4. Nishi, Yasuyuki & Suzuo, Ryouta & Sukemori, Daichi & Inagaki, Terumi, 2020. "Loss analysis of gravitation vortex type water turbine and influence of flow rate on the turbine’s performance," Renewable Energy, Elsevier, vol. 155(C), pages 1103-1117.
    5. Edirisinghe, Dylan S. & Yang, Ho-Seong & Gunawardane, S.D.G.S.P. & Lee, Young-Ho, 2022. "Enhancing the performance of gravitational water vortex turbine by flow simulation analysis," Renewable Energy, Elsevier, vol. 194(C), pages 163-180.
    6. Nosare Maika & Wenxian Lin & Mehdi Khatamifar, 2023. "A Review of Gravitational Water Vortex Hydro Turbine Systems for Hydropower Generation," Energies, MDPI, vol. 16(14), pages 1-39, July.

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