DEVELOPMENT OF LARGE SCALE CRYOGENIC SUPERFLUID HELIUM REFRIGERATION SYSTEM

While the applications of low temperature superconducting technology in basic scientific research spread widely,the development of cryogenic engineering was greatly accelerated,and lots of large helium cryogenic systems were established successively.The processes,performances and operating conditions of several typical superfluid helium cryogenic systems were described in detail.The advantages of the application of the super flow helium in the large-scale cryogenic system are introduced and the main equipment composition,the thermodynamic cycle scheme and the key equipment,the key technology breakthrough direction are analyzed in this paper.