Research on Temperature Control Technology of high- Pressure Loop Gas Flow Standard Facility

The high-pressure loop gas flow standard facility (hereinafter referred to as the facility) is a working measurement standard [1] for gas flowmeters to perform measurement performance tests under different pressures. It can study and improve the measurement performance of flowmeters under different pressures and different gas media, which is of great significance to the research of flow measurement technology. This paper studies the temperature control technology of the facility, the purpose is to make the temperature meet the working requirements of the facility and as close as possible to the existing international advanced level. Through theoretical analysis and experimental methods, combined with the author's company and the experience of external construction facilities, this paper designs an intelligent control system including its various subsystems, and realizes the design requirement that the temperature change of the facility's working gas is not greater than ± 0.1 ℃ /min. This paper shares the construction experience, and proposes a technical route for further improvement by using advanced control methods such as fuzzy control and neural network control to reach the existing international excellent level of ±0.05 °C/min.