A theoretical model for predicting the startup performance of pumps as turbines

Yu-Liang Zhang; Yan-Juan Zhao; Zu-Chao Zhu

doi:10.1038/s41598-024-57693-9

A theoretical model for predicting the startup performance of pumps as turbines

Sci Rep. 2024 Mar 23;14(1):6963. doi: 10.1038/s41598-024-57693-9.

Authors

Yu-Liang Zhang¹, Yan-Juan Zhao², Zu-Chao Zhu³

Affiliations

¹ College of Mechanical Engineering, Quzhou University, Quzhou, 324000, China. zhang002@sina.com.
² College of Information Engineering, Quzhou College of Technology, Quzhou, 324000, China.
³ The Zhejiang Provincial Key Lab of Fluid Transmission Technology, Zhejiang Sci-Tech University, Hangzhou, 310018, China.

PMID: 38521814
DOI: 10.1038/s41598-024-57693-9

Abstract

Using the unsteady Bernoulli equation for the piping system and the angular momentum equation for the rotor, derives here a theoretical model to predict the startup performance of a pump as turbine (PAT). This model is effective for predicting the instantaneous evolution characteristics of the main performance parameters of PAT during startup, and these changings are initially faster and then slowly as a whole. The effect of the rotor moment of inertia and the final stabilized rotational speed of PAT on evolution characteristics of parameters is opposite. The rotational speed, head, hydraulic power, and conversion efficiency show a upward rising trend with the startup time, whereas the flow rate and hydraulic head loss display a downward trend.

Abstract

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