Optimization on operation scheme of hot water circulating pump in heating network with quality adjustment scheme by stages

Through calculation and analysis, finds that, when the circulating water flow rate varies from 100% to 75% in a small-scale heating system with two pumps of the same type running in parallel, the power consumption of the pump in 75% of load is not 42.2% of that in the rated load, which is generally larger than 42.2%. Given the power consumption of the speed adjusting device and the motors, provides an optimal operation scheme with quality adjustment scheme by stages.