[특허]Cryogenic liquid tank

AeroVironment Inc.

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특허 상세정보

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Cryogenic liquid tank

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F17C-001/12
미국특허분류(USC)	220/560.11; 220/560.04; 220/560.12; 220/560.15; 220/560.06; 220/004.12; 220/567; 220/507; 220/562; 114/074A; 114/074R; 564/581; 564/586; 244/171.7
출원번호	US-0586544 (2009-09-23)
등록번호	US-8960482 (2015-02-24)
발명자 / 주소	Brooks, Alexander Nelson Hibbs, Bart Dean Thompson, David Robert
출원인 / 주소	AeroVironment Inc.
대리인 / 주소	Aagaard, Esq., Eric J.
인용정보	피인용 횟수 : 0 인용 특허 : 31

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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 ...

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1. A liquid storage tank, comprising a wall that defines and substantially surrounds a fluid storage space, the wall including: a hard layer;a flexible layer sealed to the hard layer such that a sealed compartment is formed between the hard layer and the flexible layer; anda first intermediate layer in the sealed compartment between the hard layer and the flexible layer, the first intermediate layer being made from a plurality of first-layer sections, each of these first-layer sections having a lateral periphery that laterally abuts the lateral periphery of one or more of the other of the plurality of first-layer sections to extend laterally throughout the wall;wherein the first-layer sections are each aerogel tiles made from aerogel powder; andwherein the sealed compartment is evacuated of air such that the first-layer sections are held in tight contact with the hard layer and one another. 2. The liquid storage tank of claim 1, wherein the flexible layer is on an external side of the wall, and wherein the hard layer is on an internal side of the wall that adjoins the fluid storage space. 3. The liquid storage tank of claim 1, and further comprising a second intermediate layer in the sealed compartment between the hard layer and the flexible layer, the second intermediate layer being made from a plurality of second-layer sections, each of these second-layer sections having a lateral periphery that laterally abuts the lateral periphery of one or more of the other second-layer sections to extend laterally throughout the wall; wherein the second-layer sections are each aerogel tiles made from aerogel powder; andwherein, the wall is characterized by having no laterally extending portion completely over which every intermediate layer has an extending section periphery. 4. The liquid storage tank of claim 3, wherein, for every first-layer section, no portion of the periphery of that first-layer section both extends parallel to and radially overlaps a portion of the periphery of any second-layer section. 5. The liquid storage tank of claim 3, wherein the peripheries of the first-layer sections and the peripheries of the second-layer sections form a plurality of radial overlap points, and further comprising a plurality of individual sections, each individual section being positioned to cover one or more overlap points. 6. The liquid storage tank of claim 5, wherein each individual section is located between the first intermediate layer and the second intermediate layer. 7. The liquid storage tank of claim 5, wherein each individual section is located to cover one overlap point, and wherein each individual section is located between the first intermediate layer and the flexible layer. 8. The liquid storage tank of claim 5, wherein each individual section has a lateral periphery that does not laterally abut the lateral periphery of any other individual section. 9. The liquid storage tank of claim 3, and further including a one or more tubes configured to be used as a vapor shield, wherein the one or more tubes extend from within the fluid storage space, and between the first intermediate layer and the second intermediate layer. 10. The liquid storage tank of claim 3, and further including a third intermediate layer between the first intermediate layer and the second intermediate layer, the third intermediate layer being made of a plurality of third-layer sections and one or more tubes that extend from within the fluid storage space and are configured to be used as a vapor shield, each third-layer section having a lateral periphery that laterally abuts either the lateral periphery of one or more of the other plurality of third-layer sections or a side of one of the one or more tubes to extend laterally throughout the wall. 11. A method of constructing a cryogenic tank, comprising the steps of: identifying a first pattern of tile shapes to form a first layer over a hard shell;providing aerogel tiles made from sheets of pre-compressed opacified aerogel powder cut to the tile shapes identified in the step of identifying a first pattern of tile shapes and packaged in a porous bag, each tile being characterized by a size, and wherein the size of each tile is set to allow the aerogel tiles to be flexed into loose contact with the hard shell;tiling the hard shell with aerogel tiles by affixing each tile in place on the hard shell;constructing and sealing a film bag close around a periphery of the hard shell that has been tiled to form a sealed compartment containing the aerogel tiles between the hard shell and the film bag; andevacuating air from the sealed compartment to bring the tiles into tight contact with the hard shell and each other. 12. The method of claim 11, and further comprising: prior to the sealing of the film bag, identifying a second pattern of tile shapes to form a second layer over the first layer;prior to the sealing of the film bag, providing aerogel tiles made from sheets of pre-compressed opacified aerogel powder cut to the tile shapes identified in the step of identifying a second pattern of tile shapes and packaged in a porous bag, each tile being characterized by a size, and wherein the size of each tile is set to allow the aerogel tiles to be flexed into loose contact with the first layer; andtiling the first layer with aerogel tiles by affixing each tile in place on the first layer;wherein, in the step of constructing and sealing a film bag, the sealed compartment contains both the first layer and the second layer; andwherein the first layer tiles have no laterally extending periphery over which the second layer tiles have an extending tile periphery. 13. A liquid storage tank, comprising a wall that defines and substantially surrounds a fluid storage space, the wall including: a hard layer;a flexible layer;a plurality of intermediate layers between the hard layer and the flexible layer, each of the plurality of intermediate layers being made from a plurality of sections, each of these plurality of sections having a lateral periphery that laterally abuts the lateral periphery of one or more of the other plurality of sections to extend laterally throughout the wall, wherein, the wall is characterized by having no laterally extending portion completely over which every intermediate layer has an extending periphery, and wherein the peripheries of the first-layer sections and the peripheries of the second-layer sections form a plurality of radial overlap points; anda plurality of individual sections, each individual section being positioned to cover one or more overlap points. 14. The liquid storage tank of claim 13, wherein, for every first-layer section, no portion of the periphery of that first-layer section both extends parallel to and radially overlaps a portion of the periphery of any second layer section. 15. The liquid storage tank of claim 13, wherein the peripheries of the first-layer sections and the peripheries of the second-layer sections form a plurality of radial overlap points, and further comprising a plurality of individual sections, each individual section being positioned to cover one or more overlap points. 16. The liquid storage tank of claim 15, wherein each individual section is located between the first intermediate layer and the second intermediate layer. 17. The liquid storage tank of claim 13, and further including a one or more tubes configured to be used as a vapor shield, wherein the one or more tubes extend from within the fluid storage space, and between the first intermediate layer and the second intermediate layer. 18. The liquid storage tank of claim 13, and further including a third intermediate layer between the first intermediate layer and the second intermediate layer, the third intermediate layer being made of a plurality of third-layer sections and one or more tubes that extend from within the fluid storage space and are configured to be used as a vapor shield, each third-layer section having a lateral periphery that laterally abuts either the lateral periphery of one or more of the other plurality of third-layer sections or a side of one of the one or more tubes to extend laterally throughout the wall. 19. The liquid storage tank of claim 15, wherein each individual section is located to cover one overlap point, and wherein each individual section is located between the first intermediate layer and the flexible layer. 20. The liquid storage tank of claim 15, wherein each individual section has a lateral periphery that does not laterally abut the lateral periphery of any other individual section.

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Cryogenic liquid tank

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