Method and apparatus for precooling a mass prior to immersion in

Details Method and apparatus for precooling a mass prior to immersion in Method and apparatus for precooling a mass prior to immersion in

1997-11-14

1999-10-05

Capossela, Ronald

Refrigeration

Processes

Treating an article

62332, 62374, F25D 1306

Patent

active

059606363

ABSTRACT:
An apparatus and method for precooling a mass to be cooled to a final low temperature by immersion in a cryogenic liquid, e.g. liquefied helium. The gaseous phase of the cryogenic liquid is cooled by heat exchange with a cryogenic liquid having a higher boiling point than the cryogenic liquid within which the mass is to be immersed. The cooled gaseous phase is circulated through a vessel containing the mass, recovered, recooled and recirculated until the mass and its containment vessel are at the desired precooling temperature. Thereafter cryogenic liquid can be introduced into the vessel to immerse the mass.

REFERENCES:
patent: 3413818 (1968-12-01), Pelmulder
patent: 3485055 (1969-12-01), Webster et al.
patent: 4856285 (1989-08-01), Acharya et al.
patent: 5694776 (1997-12-01), Sahm

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