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Loss analysis of gravitation vortex type water turbine and influence of flow rate on the turbine’s performance

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  • Nishi, Yasuyuki
  • Suzuo, Ryouta
  • Sukemori, Daichi
  • Inagaki, Terumi

Abstract

A gravitation vortex type water turbine is a water turbine that uses gravitational vortices generated upon water draining from a tank bottom and can generate power at low head and low flow rate. In our case, given its operation in a free surface flow field, it is critical to quantitatively understand the performance and hydraulic loss at various flow rates for its design and operation. Accordingly, we investigated the influence of flow rates on the performance of the gravitation vortex type water turbine by conducting experiments and free surface flow analysis. Using the analysis results, we proposed a loss analysis method and quantitatively evaluated the hydraulic loss. We found that the effective head and the turbine efficiency increased as the flow rate increased; hence, the turbine output increased at a rate greater than the increase rate of the flow rate. Our study revealed that among the losses that occurred in the water turbine, the tank loss and tank outlet loss were the most dominant, followed by the friction loss inside the tank, whereas the runner loss and friction loss in the runner were small.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:renene:v:155:y:2020:i:c:p:1103-1117
    DOI: 10.1016/j.renene.2020.03.186
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    1. 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.
    2. Nishi, Yasuyuki & Sato, Genki & Shiohara, Daishi & Inagaki, Terumi & Kikuchi, Norio, 2019. "A study of the flow field of an axial flow hydraulic turbine with a collection device in an open channel," Renewable Energy, Elsevier, vol. 130(C), pages 1036-1048.
    3. Kolekar, Nitin & Banerjee, Arindam, 2015. "Performance characterization and placement of a marine hydrokinetic turbine in a tidal channel under boundary proximity and blockage effects," Applied Energy, Elsevier, vol. 148(C), pages 121-133.
    4. Dhakal, Sagar & Timilsina, Ashesh B. & Dhakal, Rabin & Fuyal, Dinesh & Bajracharya, Tri R. & Pandit, Hari P. & Amatya, Nagendra & Nakarmi, Amrit M., 2015. "Comparison of cylindrical and conical basins with optimum position of runner: Gravitational water vortex power plant," Renewable and Sustainable Energy Reviews, Elsevier, vol. 48(C), pages 662-669.
    5. Nishi, Yasuyuki & Sato, Genki & Shiohara, Daishi & Inagaki, Terumi & Kikuchi, Norio, 2017. "Performance characteristics of axial flow hydraulic turbine with a collection device in free surface flow field," Renewable Energy, Elsevier, vol. 112(C), pages 53-62.
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    2. He, Jiawei & Si, Qiaorui & Sun, Wentao & Liu, Jinfeng & Miao, Senchun & Wang, Xiaohui & Wang, Peng & Wang, Chenguang, 2023. "Study on the energy loss characteristics of ultra-low specific speed PAT under different short blade lengths based on entropy production method," Energy, Elsevier, vol. 283(C).
    3. 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.
    4. Cruz, M. & Henriques, R. & Pinho, J.L. & Avilez-Valente, P. & Bio, A. & Iglesias, I., 2023. "Assessment of the potential for hydrokinetic energy production in the Douro river estuary under sea level rise scenarios," Energy, Elsevier, vol. 271(C).
    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. Janusz Bohatkiewicz & Marcin Dębiński & Mateusz Marciniuk & Aleksandra Cybulska, 2021. "The Use of Renewable Energy Sources in a Road Lane on the Example of the Network of National Roads and Highways in Poland," Energies, MDPI, vol. 14(15), pages 1-12, July.

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