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Multi-objective optimization design for broadening the high efficiency region of hydrodynamic turbine with forward-curved impeller and energy loss analysis

Author

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  • Yang, Gang
  • Shen, Xi
  • Pan, Qiang
  • Ding, Jingfei
  • Luo, Wenhua
  • Meng, Jia
  • Zhang, Desheng

Abstract

The energy recovery hydrodynamic turbine is characterized by convenience and high efficiency, has become the core energy conversion device in energy-saving and emission reduction systems in the world. The forward-curved impeller pump as turbine (FCI-PAT) exhibits advantages such as wide high efficiency region and strong operational stability, but its hydraulic design method is still immature. In this study, a multi-objective optimization design for the FCI-PAT is carried out based on numerical simulations and experimental test, aiming to broaden the high efficiency region. The blade inlet setting angle β1, blade outlet setting angle β2, blade wrap angle φ, blade inlet width b1 and blade number z of the forward curved impeller are optimized by combining artificial neural network and intelligent optimization algorithm. The energy loss mechanism in the FCI-PAT is investigated based on the entropy production theory, and the reasons for the performance improvement are analyzed in depth. The research results show that the weighted average hydraulic efficiency of FCI-PAT is increased by 2.06 % after optimization. The hydraulic efficiency of the FCI-PAT increased by 0.95 %, 3.04 % and 1.65 % under 0.8Qd, 1.0Qd and 1.2Qd, respectively. The hydraulic loss in the impeller and draft tube of the optimized model is reduced significantly, with a more uniform distribution of streamlines and a narrowed low-velocity region. The entropy production rate at the suction surface side of the impeller inlet and draft tube inlet of the optimized model is significantly decreased under three conditions, and the reduction is the most significant under 1.0Qd. The inlet and outlet design parameters of the forward-curved impeller have a significant impact on the energy recovery efficiency of FCI-PAT and should be focused on at the design stage.

Suggested Citation

  • 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).
    • Handle: RePEc:eee:renene:v:245:y:2025:i:c:s096014812500480x
    DOI: 10.1016/j.renene.2025.122818
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    References listed on IDEAS

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    1. Štefan, David & Rossi, Mosè & Hudec, Martin & Rudolf, Pavel & Nigro, Alessandra & Renzi, Massimiliano, 2020. "Study of the internal flow field in a pump-as-turbine (PaT): Numerical investigation, overall performance prediction model and velocity vector analysis," Renewable Energy, Elsevier, vol. 156(C), pages 158-172.
    2. 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.
    3. Sun, Longyue & Pan, Qiang & Zhang, Desheng & Zhao, Ruijie & Esch, B.P.M.(Bart) van, 2022. "Numerical study of the energy loss in the bulb tubular pump system focusing on the off-design conditions based on combined energy analysis methods," Energy, Elsevier, vol. 258(C).
    4. 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).
    5. Giosio, D.R. & Henderson, A.D. & Walker, J.M. & Brandner, P.A. & Sargison, J.E. & Gautam, P., 2015. "Design and performance evaluation of a pump-as-turbine micro-hydro test facility with incorporated inlet flow control," Renewable Energy, Elsevier, vol. 78(C), pages 1-6.
    6. Qi, Bing & Zhang, Desheng & Geng, Linlin & Zhao, Ruijie & van Esch, Bart P.M., 2022. "Numerical and experimental investigations on inflow loss in the energy recovery turbines with back-curved and front-curved impeller based on the entropy generation theory," Energy, Elsevier, vol. 239(PE).
    7. 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.
    8. Ye, Weixiang & Ikuta, Akihiro & Chen, Yining & Miyagawa, Kazuyoshi & Luo, Xianwu, 2021. "Investigation on the effect of forward skew angle blade on the hump characteristic in a mixed flow pump using modified partially averaged Navier-Stokes model," Renewable Energy, Elsevier, vol. 170(C), pages 118-132.
    9. Nautiyal, Himanshu & Varun & Kumar, Anoop, 2010. "Reverse running pumps analytical, experimental and computational study: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(7), pages 2059-2067, September.
    10. Wang, Tao & Wang, Chuan & Kong, Fanyu & Gou, Qiuqin & Yang, Sunsheng, 2017. "Theoretical, experimental, and numerical study of special impeller used in turbine mode of centrifugal pump as turbine," Energy, Elsevier, vol. 130(C), pages 473-485.
    11. Jiyun Du & Hongxing Yang & Zhicheng Shen, 2018. "Study on the impact of blades wrap angle on the performance of pumps as turbines used in water supply system of high-rise buildings," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 13(1), pages 102-108.
    12. Zhang, Wenwu & Chen, Zhenmu & Zhu, Baoshan & Zhang, Fei, 2020. "Pressure fluctuation and flow instability in S-shaped region of a reversible pump-turbine," Renewable Energy, Elsevier, vol. 154(C), pages 826-840.
    13. Wang, Tao & Kong, Fanyu & Xia, Bin & Bai, Yuxing & Wang, Chuan, 2017. "The method for determining blade inlet angle of special impeller using in turbine mode of centrifugal pump as turbine," Renewable Energy, Elsevier, vol. 109(C), pages 518-528.
    14. Jain, Sanjay V. & Patel, Rajesh N., 2014. "Investigations on pump running in turbine mode: A review of the state-of-the-art," Renewable and Sustainable Energy Reviews, Elsevier, vol. 30(C), pages 841-868.
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