Cryostat refrigeration system using mixed refrigerants in a clos

Details Cryostat refrigeration system using mixed refrigerants in a clos Cryostat refrigeration system using mixed refrigerants in a clos

1995-06-29

1996-12-03

Capossela, Ronald C.

Refrigeration

Refrigeration producer

Compressor-condenser-evaporator circuit

62470, 62513, 165 58, 165201, F25B 4106

Patent

active

055796540

ABSTRACT:
A closed cycle cryogenic refrigerating system with a fixed restrictor operates with a compressor inlet pressure in a range of 0.1 Mpa to 0.4 Mpa and compressor discharge pressure in a range of 1.5 Mpa and 2.5 Mpa. A basic cryogenic refrigerant mixture is used to which is added approximately 3% to 25% of helium, hydrogen and/or neon. A ratio of refrigerant density at the inlet of the fixed restrictor between steady-state operation and operation at the beginning of cool-down is in an approximate range of 7 to 17. Relatively rapid cool-down is achieved and evaporator temperature is maintained in an approximate range of 70K to 120K.

REFERENCES:
patent: 3836779 (1974-09-01), Bruno
patent: 4094169 (1978-06-01), Schmerzler
patent: 4793150 (1988-12-01), Wattley et al.
patent: 4949546 (1990-08-01), Klusmier et al.

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