Refrigeration apparatus and method of refrigeration

Details Refrigeration apparatus and method of refrigeration Refrigeration apparatus and method of refrigeration

F - Mech Eng,Light,Heat,Weapons

25

B

F25B 7/00 (2006.01) F25D 16/00 (2006.01)

Patent

CA 2083443

ABSTRACT REFRIGERATION APPARATUS AND METHOD OF REFRIGERATION Supplementary cooling for a mechanical refrigera- tion plant using ammonia as a refrigerant is provided by placing a tube in the vapour space of a buffer vessel and introducing liquid nitrogen into the tube. Although ammonia solidifies at -78°C and liquid nitrogen enters the tube at -196°C no ammonia solidifies on the tube even after extended operation. The present invention also provides a method of refrigeration which comprises introducing liquid nitro- gen into the heat exchanger of a refrigeration apparatus in accordance with the invention and condensing refri- gerant therewith. Preferably, the refrigerant is selected from the group consisting of ammonia and fluorocarbon R22.

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