一次泵变流量系统在地铁车站中的应用分析

Application of Variable Primary Flow System in Subway Station

一次泵变流量系统近年来在地铁中逐步应用,鉴于地铁车站空调负荷的特性,经过对地铁典型车站的运行费用的分析,一次泵变流量具有较明显的经济性。但其节能效果的取得,取决于冷水机组的性能特性及控制系统,建议采用冷冻水调节范围大,COP影响小的冷水机组;采用定冷冻水进出水温度,同时尽量不调节二通阀开度、关闭压差旁通阀阀的控制方案。

Variable primary flow system（VPF） has be used gradually in recent years in the subway station. Given the subway station air conditioning load characteristics,running costs for a typical subway station air-conditioning water system carried out a detailed analysis of variable primary flow system has obvious economy. However,the energy saving effect depends on the performance characteristics of the chiller and the control system. Such chillers are recommended,which with large adjustment range chilled water and with little impact to COP. Such control strategy is recommended,which constant outlet and inlet chilled water temperature,at the same time try not to adjust the degree of the two-way valve,close pressure bypass valve.