This paper states the method of selecting and using circulatingpump in hot water heating system properly to save electric energy.
合理的选择和使用热水供暖系统循环水泵，以达到节约电能的目的。
2
Based on the motion function and characteristic in different modes of water system of air-conditioning, the differential of circulating water volume pump and elevation of pump were analyzed.
根据空调水系统在不同工况下运行的性能与特点，分析冬夏及部分负荷运行时，空调水系统的流量和扬程差异。
3
The basic principle of distributed circulatingpump heat-supply system is introduced.