From the viewpoint of energy saving, the application of variable frequency technology in the secondary pump system was expounded and the energy consumption of variable frequency pump was analyzed.
从节能的角度，阐述了变频技术在二次泵变水量系统中的应用，对变频水泵的能耗进行了分析。
Simultaneously, it provides the method to determine the best pressure of header system and optimum frequency of variable frequency pump based on the special working condition.
同时，给出了在特定工况下，确定最佳母管压力和变频泵最佳频率的方法。
Motor loss takes a large proportion in total power of pump when variable frequency pump is used.
水泵变频时电动机损耗占水泵总功耗的比例较大。
In the heat-supply system with distributed variable frequency pump, there exists a zero pressure difference, at which supply and return water pressures are equal.
分布式变频泵供热系统中存在零压差点，该点供回水压力相等。
In the heat-supply system with distributed variable frequency pump, there exists a zero pressure difference, at which supply and return water pressures are equal.
分布式变频泵供热系统中存在零压差点，该点供回水压力相等。
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