Speakers
Description
A 250 W@4.5 K helium refrigerator has been developed in the Technical Institute of Physics and Chemistry, CAS. To establish operation control strategies and provide a user friendly human machine interface, a dynamic real-time simulator has been developed for this helium refrigerator based on software EcosimPro and Siemens PLC S7-300. This helium refrigerator which consists of one screw compressor, two turbo expanders, ten heat exchangers and a 500 liters liquid helium reservoir is modelled by software EcosimPro. The PLC interactives data with EcosimPro model by OPC technology. The cool-down process of this 250 W@4.5 K helium refrigerator has been simulated. Comparison between simulation results and experimental data has been discussed. This dynamic simulator can be used as an operation training system.
