变频一二次泵设计问题四则
Four issues for primary and secondary water pumps with variable frequency control
摘要：
通过分析得出了一次泵宜采用变频调节；为避免供水环路水力失衡，变频二次泵应设最低频率限制；提出变频二次泵应多台并联供水以满足系统低负荷时的水量需求，同时提出动态压力点控制法。
关键词：一次泵,二次泵,平衡管,盈亏,最低频率限制,动态压力点
Abstract：
Recommends that the primary water systems adopt variable frequency pumps. Presents that the minimum frequency should be set for secondary water pumps with variable frequency to avoid hydraulic imbalance in water supply loops, and that the secondary water pumps should be installed in parallel to satisfy the water rate demand of partial load. Puts forward the control method of dynamic pressure point.
Keywords:primary pump, secondary pump, balance pipe, profit and loss, minimum freguency limit, dynamic pressure point