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Review of positive slopes on pump performance characteristics of pump-turbines

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  • Li, Deyou
  • Zuo, Zhigang
  • Wang, Hongjie
  • Liu, Shuhong
  • Wei, Xianzhu
  • Qin, Daqing

Abstract

Positive slopes in the performance characteristics of pump-turbines are an indicative feature of unstable behaviour in pump mode operation, and are additionally conducive to instability problems during pump start-up. With the rapid development of pumped-storage power plants, this instability has become increasingly critical to the safe and stable operation of the entire unit. Thus, this topic has been attracting attention in the pump-turbine design and research fields. In this study, the relative achievements with regard to positive slopes, which have been obtained by various investigators over the last two decades, were reviewed. Such studies, including flow characteristics, and influence parameter, related to positive slopes were summarized. The generating mechanism, accompanying unsteady phenomena, and corresponding hysteresis phenomena, are also discussed. Investigations on the influence of geometric and operating unit parameters are presented. Finally, precautions and countermeasures for the improvement of positive slopes, and various perspectives regarding future work are proposed. The present review provides theoretical guidance for the design and operation of pump-turbines, in terms of the stability of the pumped-storage powers plants.

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  • Li, Deyou & Zuo, Zhigang & Wang, Hongjie & Liu, Shuhong & Wei, Xianzhu & Qin, Daqing, 2019. "Review of positive slopes on pump performance characteristics of pump-turbines," Renewable and Sustainable Energy Reviews, Elsevier, vol. 112(C), pages 901-916.
    • Handle: RePEc:eee:rensus:v:112:y:2019:i:c:p:901-916
    DOI: 10.1016/j.rser.2019.06.036
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    References listed on IDEAS

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    Cited by:

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    2. Li, Deyou & Song, Yechen & Lin, Song & Wang, Hongjie & Qin, Yonglin & Wei, Xianzhu, 2021. "Effect mechanism of cavitation on the hump characteristic of a pump-turbine," Renewable Energy, Elsevier, vol. 167(C), pages 369-383.
    3. Qin, Yonglin & Li, Deyou & Wang, Hongjie & Liu, Zhansheng & Wei, Xianzhu & Wang, Xiaohang, 2022. "Multi-objective optimization design on high pressure side of a pump-turbine runner with high efficiency," Renewable Energy, Elsevier, vol. 190(C), pages 103-120.
    4. Zhao, Ziwen & Yuan, Yichen & He, Mengjiao & Jurasz, Jakub & Wang, Jianan & Egusquiza, Mònica & Egusquiza, Eduard & Xu, Beibei & Chen, Diyi, 2022. "Stability and efficiency performance of pumped hydro energy storage system for higher flexibility," Renewable Energy, Elsevier, vol. 199(C), pages 1482-1494.
    5. Li, Deyou & Qin, Yonglin & Wang, Jianpeng & Zhu, Yutong & Wang, Hongjie & Wei, Xianzhu, 2022. "Optimization of blade high-pressure edge to reduce pressure fluctuations in pump-turbine hump region," Renewable Energy, Elsevier, vol. 181(C), pages 24-38.
    6. Lin, Tong & Zhu, Zuchao & Li, Xiaojun & Li, Jian & Lin, Yanpi, 2021. "Theoretical, experimental, and numerical methods to predict the best efficiency point of centrifugal pump as turbine," Renewable Energy, Elsevier, vol. 168(C), pages 31-44.
    7. 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).
    8. Yang, Gang & Shen, Xi & Shi, Lei & Zhang, Desheng & Zhao, Xutao & (Bart) van Esch, B.P.M., 2023. "Numerical investigation of hump characteristic improvement in a large vertical centrifugal pump with special emphasis on energy loss mechanism," Energy, Elsevier, vol. 273(C).
    9. Kan, Kan & Binama, Maxime & Chen, Huixiang & Zheng, Yuan & Zhou, Daqing & Su, Wentao & Muhirwa, Alexis, 2022. "Pump as turbine cavitation performance for both conventional and reverse operating modes: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 168(C).
    10. Li, Deyou & Chang, Hong & Zuo, Zhigang & Wang, Hongjie & Li, Zhenggui & Wei, Xianzhu, 2020. "Experimental investigation of hysteresis on pump performance characteristics of a model pump-turbine with different guide vane openings," Renewable Energy, Elsevier, vol. 149(C), pages 652-663.
    11. Ye, Weixiang & Geng, Chen & Luo, Xianwu, 2022. "Unstable flow characteristics in vaneless region with emphasis on the rotor-stator interaction for a pump turbine at pump mode using large runner blade lean," Renewable Energy, Elsevier, vol. 185(C), pages 1343-1361.
    12. Bin Huang & Kexin Pu & Peng Wu & Dazhuan Wu & Jianxing Leng, 2020. "Design, Selection and Application of Energy Recovery Device in Seawater Desalination: A Review," Energies, MDPI, vol. 13(16), pages 1-19, August.

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