Refrigeration – Automatic control – Diverse – cascade or compound refrigeration-producing system
Patent
1992-11-20
1994-07-26
Tanner, Harry B.
Refrigeration
Automatic control
Diverse, cascade or compound refrigeration-producing system
62184, 62503, F25B 100
Patent
active
053318242
ABSTRACT:
Supplementary cooling for a mechanical refrigeration plant using ammonia as a refrigerant is provided by placing a tube in the vapor space of a buffer vessel and introducing liquid nitrogen into the tube. Although ammonia solidifies at -78.degree. C. and liquid nitrogen enters the tube at -196.degree. C. no ammonia solidifies on the tube even after extended operation. The present invention also provides a method of refrigeration which comprises introducing liquid nitrogen into the heat exchanger of a refrigeration apparatus in accordance with the invention and condensing refrigerant therewith. Preferably, the refrigerant is selected from the group consisting of ammonia and fluorocarbon R22.
REFERENCES:
patent: 3067590 (1962-12-01), Wood, Jr.
patent: 3077088 (1963-02-01), Japhet
patent: 3078689 (1963-02-01), Japhet
patent: 4123919 (1978-11-01), Fehlhaber
patent: 4233817 (1980-11-01), Toth
patent: 4732007 (1988-03-01), Dolan et al.
Drake Miles P.
Miller Jeremy P.
Monroe Charles M.
Williams Mark S.
Air Products and Chemicals Inc.
Marsh William F.
Simmons James C.
Tanner Harry B.
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