Speed and adjustable parallel pump operation number combination :
The parallel pump all equipped with stepless speed regulating device (such as frequency governor) formed by the pump group, although the cost of a large investment, but the actual use of the effect and energy saving effect. Hours of load change, and speed variable flow to adapt; when load change is big, with stops running pump units coarse adjustment and speed adjustment to adapt. The adjustment range of this regulation is large and the adaptability is good. It is the best way to adjust the energy saving operation of the pump.
It should be noted that the parallel pump is the best of the same type, specifications, but also to all equipped with stepless speed control device, in the use of synchronous adjustment in a rotating speed. This is because, by parallel pump operation characteristics shows that multiple pumps in parallel operation performance curve is by the single pump performance curve in head and other conditions, the flow superposition and get, and the pump performance curve is by its own properties (such as flow, head and efficiency, etc.) or speed. Therefore, in order to ensure effective shunt, namely parallel operation flow greater than a single pump or pumps in parallel operation flow, it is best to use the same models, specifications of pumps in parallel, and with all speed control device, such as the frequency converter; and shifting enable run at the same time the pump synchronized variable for the same speed, to avoid parallel failure and the energy not instead of more energy consumption.
