FEATURES ONE- AND TWO-CIRCUIT CRYOGENIC HELIUM SYSTEMS
DOI:
https://doi.org/10.18198/j.ind.gases.2009.0466Keywords:
Helium, Superconducting device, Cryogenic helium system, Contour of cryogenic system, Step of precooling, Step of final cooling, Refrigerator with excess reverse flow, Expander, Ejector, CryostattingAbstract
The superconducting devices (SCD) as objects of cryostatting are characterized by small specific thermal loadings and their significant variations. At creation cryogenic helium systems (CHS) for cyostatting SCD aspire to the minimal expenses of energy. Except that in CHS apply such circuits that the optimum mode of their work didn't depend on operating conditions of cryostatting objects. Such systems are two-circuit CHS with refrigerators with excess reverse flow (RERF). Use the RERF in step of final cooling of expander has allowed not only to approach the efficiency of two-circuit CHS with RERF in settlement mode to one-circuit CHS with refrigerator installations with multistage expansion, but also to surpass the last during change of thermal loading in wide range of its values.
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