F - Mech Eng,Light,Heat,Weapons – 17 – C
Patent
F - Mech Eng,Light,Heat,Weapons
17
C
F17C 1/12 (2006.01) F17C 3/02 (2006.01) F17C 9/00 (2006.01) F17C 13/00 (2006.01) F17C 13/02 (2006.01)
Patent
CA 2176068
A relatively inexpensive system and method for regulating the temperature of a cryogenic liquid in a storage vessel (2), such as vehicle refueling station, comprises inner and outer walls (6, 8) defining a inner chamber (12) for housing the cryogenic liquid. To provide a variable thermal resistance around the inner chamber, a thermal control fluid is disposed within an insulation space (10) between the inner and outer walls. A fluid conduit (30) has an inlet and outlet in fluid communication with the chamber and a heat exchanger coil (36) disposed within the insulation space. A control valve (38) allows the cryogenic liquid to flow through the fluid conduit so that the cryogenic liquid is in heat exchange relationship with the thermal control gas as the liquid passes through the coil (i.e., the cryogenic liquid cools and condenses the thermal control gas to reduce the control gas pressure). The pressure of the control gas within the insulation space can be modulated to thereby control the heat flow into the inner chamber by controlling the flow rate of the cryogenic liquid through the fluid conduit.
Aerojet General Corporation
Fetherstonhaugh & Co.
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