Startup of a pumping unit in an empty pipeline [1]

Conclusions

• 1. The resulting generalized relationships that we have defined more precisely will make it possible to determine the parameters of the transitional process during the startup of hydraulic units in the pump mode on an empty pipeline prior to reaching steady nominal revolutions with an accuracy adequate for the development of plans, i.e., the most complex stage requiring the joint consideration of the performance curves of the hydraulic machinery, motor, and pressure system.

• 2. Analog computers may be used in cases where it is necessary to study the effect of various combinations of basic parameters of the hydraulic units and pipelines on the startup processes, and also to perform a series of massive calculations. The block diagrams cited make it possible to incorporate the universal performance curves of hydraulic machinery, which are represented in various coordinate systems. The accuracy of the computations performed on the analog computer and by the analytical method is virtually the same.