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Effects of impeller geometry modification on performance of pump as turbine in the urban water distribution network

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  • Shojaeefard, Mohammad Hassan
  • Saremian, Salman

Abstract

Nowadays, by increasing energy consumption, micro-scale energy production has received a lot of attention worldwide. Pressure control and electricity generation using existing hydraulic energy are possible by substituting the Soft Pressure Regulation System (SPRS) for a pressure reducing valves (PRV) in urban water distribution network (WDN) pipelines. The economical benefit and short start-up time are unique features of the SPRS that uses a pump as turbine (PAT). In this study, the numerical and experimental results of a single-stage centrifugal pump in direct and reverse working modes were compared and validated. The effect of passage width increasing, adding splitter blades and simultaneous modification of these parameters on improving the hydraulic performance of the PAT in the working range are investigated. Geometric modifications do not have the same effect on hydraulic parameters and efficiency in all operating ranges due to the significant range of flow rate variations in the WDN. Therefore, the statistical analysis was performed to identify the optimum modifications based on the PAT's working time in the specified flow rate ranges. The results show that simultaneous modification of parameters in the range of part-load condition (0.8QBEP) to over-load condition (1.2QBEP) reduces losses while increasing efficiency and power generation.

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  • Shojaeefard, Mohammad Hassan & Saremian, Salman, 2022. "Effects of impeller geometry modification on performance of pump as turbine in the urban water distribution network," Energy, Elsevier, vol. 255(C).
    • Handle: RePEc:eee:energy:v:255:y:2022:i:c:s0360544222014530
    DOI: 10.1016/j.energy.2022.124550
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    References listed on IDEAS

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    2. Shen, Zhicheng & Yao, Yao & Wang, Qiliang & Lu, Lin & Yang, Hongxing, 2023. "A novel micro power generation system to efficiently harvest hydroelectric energy for power supply to water intelligent networks of urban water pipelines," Energy, Elsevier, vol. 268(C).
    3. Balacco, Gabriella & Fiorese, Gaetano Daniele & Alfio, Maria Rosaria & Totaro, Vincenzo & Binetti, Mario & Torresi, Marco & Stefanizzi, Michele, 2023. "PaT-ID: A tool for the selection of the optimal pump as turbine for a water distribution network," Energy, Elsevier, vol. 282(C).
    4. Dehghan, Amir Arsalan & Shojaeefard, Mohammad Hassan & Roshanaei, Maryam, 2024. "Exploring a new criterion to determine the onset of cavitation in centrifugal pumps from energy-saving standpoint; experimental and numerical investigation," Energy, Elsevier, vol. 293(C).
    5. Tong Lin & Jian Li & Baofei Xie & Jianrong Zhang & Zuchao Zhu & Hui Yang & Xiaoming Wen, 2022. "Vortex-Pressure Fluctuation Interaction in the Outlet Duct of Centrifugal Pump as Turbines (PATs)," Sustainability, MDPI, vol. 14(22), pages 1-19, November.
    6. Bai, Yang & Zhu, Qianming & Huang, Diangui, 2024. "Numerical simulation of wave-number effects on the performance of traveling wave pump-turbine in turbine mode," Renewable Energy, Elsevier, vol. 229(C).
    7. Stefanizzi, M. & Filannino, D. & Capurso, T. & Camporeale, S.M. & Torresi, M., 2023. "Optimal hydraulic energy harvesting strategy for PaT installation in Water Distribution Networks," Applied Energy, Elsevier, vol. 344(C).
    8. Wang, Tao & Xiang, Ru & Yu, He & Zhou, Min, 2023. "Performance improvement of forward-curved impeller with an adequate outlet swirl using in centrifugal pump as turbine," Renewable Energy, Elsevier, vol. 204(C), pages 67-76.
    9. Qin, Yonglin & Li, Deyou & Wang, Hongjie & Liu, Zhansheng & Wei, Xianzhu & Wang, Xiaohang & Yang, Weibin, 2023. "Comprehensive hydraulic performance improvement in a pump-turbine: An experimental investigation," Energy, Elsevier, vol. 284(C).
    10. Shojaeefard, Mohammad Hassan & Saremian, Salman, 2024. "Analyzing the impact of blade geometrical parameters on energy recovery and efficiency of centrifugal pump as turbine installed in the pressure-reducing station," Energy, Elsevier, vol. 289(C).

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