Method for pressure regulation of a cryogenic fluid tank,...

F - Mech Eng,Light,Heat,Weapons – 17 – C

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F17C 5/02 (2006.01) F17C 7/02 (2006.01)

Patent

CA 2491022

The invention concerns a cryogenic fluid tank (1) connected to an installation consuming said fluid, containing, under a storage pressure higher than atmospheric pressure, a cryogenic fluid in liquid phase at the bottom of the tank and in gas phase at the top of the tank. The tank (1) is adapted both to feed the consuming installation (2) with liquid drawn from the tank bottom, and to be supplied with fluid from outside. The method for ensuring pressure regulation of the tank (1) consists in varying the pressure at the tank top on the basis of the operating status of said tank. The invention is applicable to liquid nitrogen storage.

Un réservoir de fluide cryogénique (1), raccordé à une installation (2) consommatrice de ce fluide, contient, sous une pression de stockage supérieure à la pression atmosphérique, un fluide cryogénique en phase liquide au fond du réservoir et en phase gazeuse au sommet du réservoir. Le réservoir (1) est adapté à la fois pour alimenter l'installation consommatrice (2) en liquide soutiré au fond du réservoir, et pour être approvisionné depuis l'extérieur en fluide. Pour réguler en pression le réservoir (1), on fait varier la pression du gaz au sommet du réservoir selon l'état de fonctionnement de ce réservoir. Application au stockage d'azote liquide.

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