摘要
介绍一种离心式冷水机组油温智能控制系统,以西门子S7-200系列PLC和ProFace文本显示器组成控制系统的核心,以电子膨胀阀代替传统意义的孔板控制冷却油温的制冷剂流量,达到精确控制油温的目的。与传统油温控制系统相比,该系统对离心式冷水机组运行过程中精确控制油温、降低压缩机壳体表面温升、减小机组振动幅度有显著作用。
A kind of intelligent oil temperature control system of centrifugal water chiller is introduced. This system takes Siemens S7-200 series PLC and Pro-face text display as the core of the control system, and uses the electronic expansion valve instead of the traditional meaning of orifice plate to control the flow of refrigerant for cooling oil, to achieve the purpose of precise control of oil temperature. Compared with traditional temperature control system,it can be seen that this system has obvious effect on control of temperature, reducing the surface temperature of compressor shell and the vibration amplitude during centrifugal chiller operation.
出处
《制冷与空调》
2013年第1期18-22,共5页
Refrigeration and Air-Conditioning
关键词
离心式冷水机组
供油温度
PID
控制系统
设计
centrifugal water chiller~ oil temperature supplying~ PID~ control system~ design
