Air conditioning and refrigeration systems utilizing a cryogen

Details Air conditioning and refrigeration systems utilizing a cryogen Air conditioning and refrigeration systems utilizing a cryogen

F - Mech Eng,Light,Heat,Weapons

25

B

F25B 29/00 (2006.01) B60H 1/32 (2006.01) F24F 5/00 (2006.01) F25D 29/00 (2006.01)

Patent

CA 2110105

Methods and apparatus for controlling the tempera- ture of a conditioned space, including a supply of cryogen, and a fluid flow path for the cryogen which includes a heat exchanger. A heater is disposed to heat cryogen in the flow path in response to predetermined conditions, and a cryogen pre-heater is disposed to aid the heater. In a first embodiment, the pre-heater is aided by directing warm cryogen in heat exchange relation with cryogen flowing through the pre-heater, with the warm cryogen being taken from a point downstream from the heat exchanger. In another embodiment, the heater generates heated gases as a by-product, with the pre-heater being aided by directing the heated gases in heat exchange relation with cryogen flowing through the pre-heater.

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