Cryogenic refrigeration for vehicles

Details Cryogenic refrigeration for vehicles Cryogenic refrigeration for vehicles

1978-07-24

1980-02-05

Capossela, Ronald C.

Refrigeration

Processes

Treating an article

62 48, 62165, 62239, 62514R, F17C 702

Patent

active

041865626

ABSTRACT:
A cargo compartment of a refrigerated vehicle is cooled by a cryogen, such as carbon dioxide. A storage tank carried by the vehicle is filled with CO.sub.2 slush. Liquid CO.sub.2 is separated from solid CO.sub.2 and supplied to a heat-exchanger where it is vaporized and the vapor is warmed by heat transfer from the cargo compartment atmosphere. A minimum vapor pressure of at least about 75 psia is maintained in the heat-exchanger, and a portion of the vapor is returned to the vehicle tank, melting solid CO.sub.2 therein. The major portion of the vapor stream is expanded through one or more gas motors, passed through one or more additional heat-exchangers to cool the cargo compartment and then vented. The pressure of the returning vapor is preferably increased by a compressor attached to a gas motor and injected into the vehicle tank.

REFERENCES:
patent: 3754407 (1973-08-01), Tyree, Jr.
patent: 3810365 (1974-05-01), Hampton et al.
patent: 3984993 (1976-10-01), Muska
patent: 3994141 (1976-11-01), Schrawer
patent: 4015437 (1977-04-01), Daus

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