Loss analysis and design optimization of a small scale mixed-flow pump turbine using the orthogonal method

doi:10.12028/j.issn.2095-4239.2018.0093

Energy Storage Science and Technology ›› 2018, Vol. 7 ›› Issue (5): 913-920.doi: 10.12028/j.issn.2095-4239.2018.0093

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Loss analysis and design optimization of a small scale mixed-flow pump turbine using the orthogonal method

YAN Jianru^1,2, ZUO Zhitao¹, HOU Hucan¹, ZHOU Xin¹, CHEN Haisheng^1,2

1 Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China

Received:2018-06-16 Revised:2018-07-05 Online:2018-09-01 Published:2018-09-01
Contact: 10.12028/j.issn.2095-4239.2018.0093

Abstract

Abstract: Numerical simulations were performed on a small scale pump turbine device under different flow conditions. The impeller on which the total pressure loss concentrates was optimized using the orthogonal method. A L9(3⁴) orthogonal table was produced with four important design factors for an impeller at three levels. The optimization considered pump head deviation, pump efficiency and turbine efficiency. The results showed that the blade outlet diameter affected significantly the performance of pump turbine. Compared with the original baseline pump turbine, the optimized pump efficiency increased by 1.06% and the optimized turbine efficiency increased by 1.62% under the design conditions. Both the optimized efficiency points under the pump and turbine operating conditions moved toward to a low flow rate due to the augment of the wrap angle.

Key words: pump turbine, orthogonal optimization, hydraulic design, loss analysis

CLC Number:

TK734

YAN Jianru, ZUO Zhitao, HOU Hucan, ZHOU Xin, CHEN Haisheng. Loss analysis and design optimization of a small scale mixed-flow pump turbine using the orthogonal method[J]. Energy Storage Science and Technology, 2018, 7(5): 913-920.

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Loss analysis and design optimization of a small scale mixed-flow pump turbine using the orthogonal method

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