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

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F25D 3/10 (2006.01) B60H 1/00 (2006.01) B60H 1/32 (2006.01) F17C 9/04 (2006.01) F24F 3/06 (2006.01) F24F 5/00 (2006.01) F25D 29/00 (2006.01) F25D 31/00 (2006.01)

Patent

CA 2135273

Air conditioning and refrigeration methods and apparatus for controlling the temperature of a conditioned space to a predetermined temperature band adjacent to a predetermined set point temperature via cooling and heating cycles utilizing a supply of pressurized cryogen. A fluid flow path for the cryogen includes a heat exchanger associ- ated with the conditioned space. A cryogen heater is connected in the active cryogen flow path during a heating cycle, and cryogen is directed through the heater and heat exchanger via at least two successive serial passes, utilizing the elevated pressure energy of the cryogen as the motive force.

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