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New mode to operate centrifugal pump as impulse turbine

Author

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  • Sengpanich, K.
  • Bohez, Erik L.J.
  • Thongkruer, P.
  • Sakulphan, K.

Abstract

Centrifugal pumps can be used as “Pump-as-Turbine (PaT)” by reversing the flow and operating as a Francis turbine. The proposed concept “Impulse Pump-as-Turbine (Impulse PaT)” will use centrifugal pump impeller to be used as hydro turbine by pairing with spear valve injector from impulse hydro turbine. Spear valve injector regulate water inlet flow rate, thus regulate power output of our new concept turbine. Additional benefit from utilized spear valve injector is low loss of turbine efficiency when operate at part-load condition, therefore this new concept turbine can be operated at wide range of flow condition without losing good efficiency while also eliminate risk of turbine damage from cavitation. Flow regulation through spear valve will also simplify control system for this proposed turbine compared to guide vanes. The validation methods from 1-D calculation based on Euler's turbine equation and numerical simulation by commercial CFD package shows that this new proposed concept is feasible with efficiency around 40% and wide operating range from 25% to maximum inlet flow rate. Results from numerical calculation shows that efficiency of this new concept of turbine is limited by number of blades in commercially available pump.

Suggested Citation

  • Sengpanich, K. & Bohez, Erik L.J. & Thongkruer, P. & Sakulphan, K., 2019. "New mode to operate centrifugal pump as impulse turbine," Renewable Energy, Elsevier, vol. 140(C), pages 983-993.
    • Handle: RePEc:eee:renene:v:140:y:2019:i:c:p:983-993
    DOI: 10.1016/j.renene.2019.03.116
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    References listed on IDEAS

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    Cited by:

    1. Yang, Gang & Shen, Xi & Pan, Qiang & Ding, Jingfei & Luo, Wenhua & Meng, Jia & Zhang, Desheng, 2025. "Multi-objective optimization design for broadening the high efficiency region of hydrodynamic turbine with forward-curved impeller and energy loss analysis," Renewable Energy, Elsevier, vol. 245(C).
    2. Lin, Tong & Zhang, Jiajing & Wei, Bisheng & Zhu, Zuchao & Li, Xiaojun, 2024. "The role of bionic tubercle leading-edge in a centrifugal pump as turbines(PATs)," Renewable Energy, Elsevier, vol. 222(C).
    3. Maxime Binama & Kan Kan & Hui-Xiang Chen & Yuan Zheng & Da-Qing Zhou & Wen-Tao Su & Xin-Feng Ge & Janvier Ndayizigiye, 2021. "A Numerical Investigation into the PAT Hydrodynamic Response to Impeller Rotational Speed Variation," Sustainability, MDPI, vol. 13(14), pages 1-22, July.

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