If the change-over valve fails, the by-pass valve in the exhaust gas recirculation cooler remains closed. 如果换向阀出现故障,废气再循环冷却器中的旁路阀将保持关闭状态。
Computational fluid dynamics ( CFD) simulations of dispersed two-phase flow through a flue dust change-over valve ( FDCV) were performed. 运用计算流体动力学(CFD)方法对烟气转换阀中的离散两相流场进行了数值模拟。
PLC functions communication with industrial control computer, signal exchange with signal PCB and the controlling of by-pass valve, change-over valve and stop/ start of hydraulic pump. 用PLC负责与工控机的通讯,与信号采集板的信号交换,以及旁通阀、换向阀、液压泵的启停控制。
Items of the tests are following: control test with the bypass valve, control test with the major feedwater valve and change-over test between bypass valve and major feedwater valve. 试验项目包括旁通阀控制试验、主给水阀控制试验和旁通阀与主给水阀的切换试验。