Integration and Commissioning of a Full Localization 250 W @ 4.5 K Helium Refrigerator at TIPC

27th International Cryogenics Engineering Conference and International Cryogenic Materials Conference 2018

Xie, X.J.^1 ; Yang, S.Q.^1 ; Deng, B.C.^1^2 ; Pan, W.^1 ; Wang, Y.L.^1 ; Zhu, W.P.^1 ; Wu, J.H.^1 ; Li, Q.^1 ; Gong, L.H.^1 ; Zhang, Y.^1

State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing

100190, China^1

University of Chinese Academy of Sciences, Beijing

100190, China^2

关键词: Cooling Capacity;    Helium refrigerators;    High-speed turbine;    Liquid helium;    Low pressures;    Oil removal;    Pneumatic valve;    Screw compressors;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/502/1/012013/pdf
DOI  :  10.1088/1757-899X/502/1/012013

来源: IOP

【 摘 要 】

A full Localization 250W@4.5K helium cryogenic refrigerator, composed of a helium screw compressor and its oil-removal subsystem, six plate-fin cryogenic heat exchangers, two high speed turbine expanders, eight pneumatic valves and a vessel with heat load, was developed at TIPC. The high and low pressure can be maintained stable by adjusting the PI parameters of pneumatic valves. Commissioning full localization 250W@4.5K refrigerator system is discussed. 300∼4.5K cool-down processes of cryogenic heat exchangers are present. The optimized cooling capacity of this refrigerator system is up to 317W at liquid helium teperature.