空调冷冻水系统变流量时压差变化的实测分析

摘要

本文研究了实际运行时二次泵系统流量发生变化时，顶层最不利环路末端压差与顶层供回水管压差以及与整个供回水管压差的变化情况，结果表明：三处压差变化与系统流量变化均不存在一对一的关系，压差变化相同时，系统流量变化情况不同。实际检测结果说明了最不利环路末端定压差控制和供回水管压差控制都不能精确反映系统水流量的变化情况。%T his paper studies the change of pressure difference betw een the m ost negative term inal loop and the return pipe and the return pipe pressure difference w hen the flow of secondary pum p system changes in operation. T he result show sthatthere isno one-to-one relationship forthe change betw een pressure difference and the flow ofthe system and the return pipe pressure difference. W hen the change of pressure difference is the sam e, the change of the flow of the system isdifferent.The testresultshow sthatthe constantpressure difference ofthe m ostnegative term inalloop and the return pipe cannotaccurately reflectthe change ofthe flow ofthe system .