闭式水系统气囊罐对泵启停瞬态作用研究

The Study of Transient Characteristics of the Air Tank's Effecton Pump Start Up-Shut Down in Closed Water System

探讨以乙二醇溶液为流动介质的闭式水系统的定压装置中气囊罐在离心泵开机和关机时对定压点的压力作用情况,以某大型闭式冷却水系统为实验平台,分别对设计工况下有无气囊罐作用时进行离心泵的开关机操作,气囊罐作用时,能满足水系统稳定运行时定压点的压力需求,在四种不同稳定运行工况点下的离心泵进行开关机操作,定压点压力变化趋势和波动幅值大致一致,在四种不同加速时间下进行离心泵的开机操作,气囊罐均能对定压点压力有较好的响应变化。

This paper analyzes the constant pressure device-the air tank effect to the constant pressure point in the situation of the centrifugal pump start-up transient and the shut-down transient with ethylene glycol solution as a medium in the closed cycle. Taking a big closed cooling water system as an experiment platform, under the design conditions ofrespectively switching on and off the centrifugal pump when whether an air tank works. When the air tank works, it can meet the pressure need of operating the water system stably. Under the four different stable situations of switching on and off the centrifugal pump, the pressure change trend is similar to the fluctuation amplitude of the constant pressure point.Under the four different stable situations of switching on and offthe centrifugal pump, the air tank can correspond the change the pressure of the constant pressure point.