Heat transfer method using a secondary fluid

Details Heat transfer method using a secondary fluid Heat transfer method using a secondary fluid

F - Mech Eng,Light,Heat,Weapons

25

B

F25B 7/00 (2006.01) F24F 3/147 (2006.01) F24F 5/00 (2006.01) F24F 12/00 (2006.01) F25B 25/00 (2006.01) F25B 29/00 (2006.01)

Patent

CA 2139020

The invention is directed toward an air conditioning system for a building that has a first, compact, refrigeration circuit with high cost vapor/liquid phase, refrigerant therein for dehumidifying air in the building by taking heat out of the air. The system also has a second, longer, refrigeration circuit with a low cost liquid phase, refrigerant therein, and in heat exchange relation with the first circuit, for absorbing the heat picked up by the first circuit The second circuit has two branches with a heat exchanger in each branch for rejecting the heat picked up to outside air. In one branch, used in the wintertime, the heat exchanger in the one branch is used to preheat outside makeup air that is taken in to the system. In another branch, used in the summertime, the heat exchanger in the other branch gives up the heat to outside air outside of the building The use of the two circuits with two different refrigerants reduces the amount of the expensive refrigerant required

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