Cryogenic liquid tank

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

Patent

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Details

F17C 1/12 (2006.01) B64D 37/06 (2006.01) F17C 3/02 (2006.01) F17C 3/10 (2006.01) F17C 13/00 (2006.01)

Patent

CA 2739494

A hydrogen storage tank for a hydrogen fueled aircraft. The tank has a wall made of layers of aerogel sections around a hard shell layer, sealed within a flexible outer layer, and having the air removed to form a vacuum. The periphery of each layer section abuts other sections of that layer, but only overlies the periphery of the sections of other layers at individual points. The wall is characterized by a thermal conductivity that is lower near its gravitational top than its gravitational bottom. The tank has two exit passageways, one being direct, and the other passing through a vapor shield that extends through the wall between two layers of aerogel. A control system controls the relative flow through the two passages to regulate the boil-off rate of the tank.

La présente invention concerne un réservoir de stockage d'hydrogène pour un aéronef à hydrogène. Le réservoir comporte une paroi constituée de couches de sections aérogel autour d'une couche de coque dure, scellées dans une couche externe souple, l'air étant enlevé pour former un vide. La périphérie de chaque section de couche appuie contre d'autres sections de cette couche, mais chevauche uniquement la périphérie des sections d'autres couches en des points individuels. La paroi est caractérisée par une conductivité thermique qui est plus faible près de son sommet gravitationnel que de son fond gravitationnel. Le réservoir comporte deux passages de sortie, l'un étant direct et l'autre traversant un panneau pare-vapeur qui s'étend à travers la paroi entre deux couches d'aérogel. Un système de commande régule le flux relatif à travers les deux passages pour réguler le taux d'évaporation du réservoir.

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