Author(s): N. Nikolov; M. Maradjieva
Linked Author(s):
Keywords: Rotary pump; Algorithm; Numerical method; Similarity laws; Transient process; Membrane valve; Start-giving valve; Back-pressure valve; Break-down disconnection
Abstract: Effective protection of pipelines of pumping stations during a transient process is proposed. The protection includes a programmable membrane valve and a start-giving valve on branch of the pipeline. The operation of the programmable membrane valve and the coefficients of the set were investigated by theoretical and experimental methods. The mobile structure of the valve permits alternative values of the start-giving valve, the diameter of the diaphragm, the filling tube and the size of the valve. The authors studied the above mentioned protection in time of break-down disconnection of pumping stations. During this process an insignificant increase in head was observed. An algorithm, numerical model and some examples are described in the case of transient process with the protection mentioned above. A practical application in computer programmes is possible by means of the dynamic equation of motion, the similarity laws of the pump, the boundary conditions and the correction factors determined by experiments.
Year: 2003