计量供热系统变流量运行节能分析

Energy saving from variable flow operation of a heating system with heat metering

阐述了循环水泵变频调速的节能原理,提出离心水泵相似定律的适用性和等效率曲线概念。通过提出输配管压损曲线概念,从理论上分析了计量供热变流量系统循环水泵常用的恒扬程控制和恒定最不利环路压降控制两种方案,认为恒定最不利用户资用压力方案节能效果较好。

Presents the energy saving principle of a frequency-controlled pump and points out the applicability of the law of similitude for centrifugal pumps and the conception of constant efficiency curves. By citing distribution piping loss curve, analyses the two commonly used control methods of constant pump head and constant remote circuit differential pressure and considers that control with a constant remote circuit differential pressure is the better.