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热水采暖循环水泵的选择,一般是按采暖最大热负荷计算出需要的循环水泵的流量和扬程,再由水泵产品样本上的水泵性能曲线及其表格中,选取两台相同型号和性能的水泵.然而,在整个采暖期室外空气温度比较低的时间一般约为一个月左右.因此,按采暖最大热负荷选择两台相同型号和性能的循环水泵其运行是不经济的.笔者认为,选择两台不同流量和扬程的循环水泵,在采暖期室外空气温度较高时使用流量和扬程较小的水泵,或者用低转数的水泵作为循环水泵,既能节省电能,又能满足采暖的要求. 一、用不同流量和扬程的水泵作循环水泵
The choice of hot water heating circulating pump is generally based on the maximum heat load heating to calculate the required circulation pump flow and lift, and then from the water pump performance curve and the table on the pump product sample, select two pumps of the same type and performance However, the time during which the outdoor air temperature is relatively low during the entire heating period is generally around one month. Therefore, it is not economical to select two circulating pumps of the same model and performance according to the maximum heat load for heating. The author believes that choosing two The circulating pump with different flow rates and heads, when the outdoor air temperature is high in the heating period, uses a pump with a small flow and head, or uses a low-speed pump as a circulating pump, which can not only save energy, but also meet the heating requirements. First, the use of different flow and head pumps for circulating water pumps