F - Mech Eng,Light,Heat,Weapons – 25 – B
Patent
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 2110098
ABSTRACT OF THE DISCLOSURE Methods and apparatus for controlling the tempera- ture of a conditioned space to a predetermined set point temperature, utilizing a supply of cryogen in liquid and vapor states. The two states are drawn from the supply in two separate flow paths. The liquid cryogen is vaporized in a heat exchanger, and the two flow paths are then combined. The combined cryogen is used to drive a vapor motor connected to a fan, with the fan moving air between the conditioned space and the heat exchanger. Heat is applied to the cryogen as required to hold the set point temperature or to defrost the heat exchanger. In a preferred embodiment, the cryogen is added to a first vessel at the pressure provided by ground support appara- tus, and expanded into a second vessel as a function of system conditions, to provide the supply of cryogen in both the liquid and vapor states.
Roehrich Roland Louis
Viegas Herman Hermogio
Bereskin & Parr
Thermo King Corporation
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