Analysis on Energy Saving of Pumps Movement Adjustment in a Closed Cycle

In practical engineering, water supply systems often work in variable working condition and their energy Consumption depends largely on the adjustment methods. Through the experiments, pumps in parallel were operated by many kinds of regulate methods in varied flow or in variable frequency, the Q-¿ graphs in different schemes were obtained and energy saving effects of the systems variable frequency control contrast with ones in variable flow control in different flow intervals were got after a comparative analysis of the energy flow which provide basis for energy saving effect researches of interrelated water supply systems in air conditioning and refrigeration areas.