Energy performance prediction of single-stage single-suction centrifugal pump under multiple operating conditions

Abstract

Abstract: In order to predict accurately the energy performance of centrifugal pumps under different working conditions, their hydraulic loss models are established based on the existing theoretical and empirical formulas at home and abroad. The linear regression method is used to find out the functional relationship between the impeller inlet angle of attack and the impact loss, so that the impact loss formula is revised. Thereby, to verify the accuracy of this model in predicting the energy performance of centrifugal pumps under different working conditions, a centrifugal pump with a specific speed of 92.8 is selected to calculate the head, efficiency and shaft power at nine operating points, and the result is compared with that of experiment and analyzed. The results show that the prediction results of the head will be basically consistent with the test results. The error between the predicted head and the test head at nine operating points will be less than 5%. This shows that the hydraulic loss equation can be used to predict the energy performance of centrifugal pumps well under different working conditions.

Key words: centrifugal pump, multi-operation condition, hydraulic loss, head

CLC Number:

TH311

YANG Jun-hu, JI Ya-ya, LIN Bin, MA Qi-hang, LUO Yu-tong, LI Zhi-fan. Energy performance prediction of single-stage single-suction centrifugal pump under multiple operating conditions[J]. Journal of Lanzhou University of Technology, 2020, 46(2): 48-54.

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