A gaseous hydrogen storage system may include a primary container including a metal sidewall and a metal dome. The primary container may be configured to retain gaseous hydrogen. A portion of the primary container, such as the metal sidewall may be covered with a composite material layer. The metal sidewall and the metal dome may be constructed from carbon steel, stainless steel, a nickel-based steel, and combinations thereof.

A pressure vessel made of two thin-walled, closed-end tube sections joined at a central hub that encircles the open ends of the two closed-end tube sections, with a plurality of radial bolts attaching the sections together. The central hub has an O-ring groove in which an O-ring rests, providing a seal between the interior of the pressure vessel and the outside. The inner wall of the central hub may have radially thin and radially thick sections to distribute and minimize weight without sacrificing strength. The assembly may be attached to a mounting surface through a dovetail mount on the central hub.

A load-decoupling attachment system is configured to secure to a primary structure. The load-decoupling attachment system includes one or more baffle tiers. One or more beams are coupled to the one or more baffle tiers. The one or more beams include a fore end and an aft end. A fore end coupling joint is configured to secure the fore end to a first portion of the primary structure. The fore end coupling joint includes a spherical bearing that allows the fore end to rotate in relation to the first portion of the primary structure. An aft end coupling joint is configured to secure the aft end to a second portion of the primary structure. The aft end coupling joint includes a slot that allows the aft end to linearly translate in relation to the second portion of the primary structure.

A reinforced plastic air storage cylinder, including an upper shell comprising a first inner volume, a first inner wall defining the first inner volume, and a first outer frame comprising reinforcing ribs connected to an exterior surface of the first inner wall to provide structural support thereto, wherein the first inner wall comprises a plurality of arc segments connected together to form petal-like structures wherein the plurality of arc segments of the first inner wall forms a plurality of peaks projecting into the first inner volume at locations where adjacent arc segments of the plurality of arc segments of the first inner wall connect to one another; a first center column positioned in the first inner volume; a first set of tensile ribs; and a lower shell comprising a second inner volume.

A mount for a double-walled vessel includes a first support to support the mount against an outer wall of the double-walled vessel, a second support to support the mount against an inner wall of the double-walled vessel, and a flexible member connecting the first support and the second support. The first support and can be arranged at a first end of the flexible member and the second support can be arranged at a second end of the flexible member opposite to the first end. Further described are a vessel including at least one such mount as well as a vehicle including such vessel.

A tank system and method for storing cryogenic liquids includes a support cooling channel to reduce heat leak into the vessel of a fuel tank. The fuel tank may store either liquid natural gas or liquid hydrogen or another cryogenic liquid. A cooling fluid is transferred from a second vessel into the support cooling channel of the fuel tank.

A cryogenic dewar may include an inner tank and an outer tank. The cryogenic dewar may further include one or more longitudinal stiffeners coupled to the inner tank at locations of stress that provide resistance to such stress. The inner vessel may include a combination of longitudinal stiffeners to allow the dewar to meet governmental imposed regulations on strength and safety of the dewar without increasing the weight of the dewar or to increase the amount by weight of cryogenic liquid that can be transported under governmental imposed regulations, or both, by, with the addition of longitudinal stiffeners, simultaneously increasing the grade of the material of the inner tank.

A tank comprises: a liner including a circular cylindrical body part having a center axis and a dome part placed at each of opposite ends of the body part; and a reinforcing layer placed on the liner and containing fiber. The reinforcing layer includes a hoop layer placed on the body part and a helical layer placed across an area on the hoop layer and on the dome part. The hoop layer includes a hoop body layer and a hoop end layer connected to the hoop body layer and located at an end portion of the hoop body layer in an axis direction along the center axis. The hoop end layer has a shape projecting externally further in a radial direction of the body part than the hoop body layer, and includes an apex portion located at the outermost position in the radial direction and a tilted surface extending from the apex portion toward an outer surface of the dome part and having a shape conforming to the shape of the outer surface.

A liquified air storage system can include a container assembly. The container assembly can be disposed on a base. The container assembly can have an interior portion and an exterior portion. The interior portion can include a reinforced concrete layer and a steel liner. The exterior portion can be disposed adjacent to the interior portion, the exterior portion including prestressed wire. A method of assembling a liquified air storage system can include assembling an interior portion of a container assembly. The interior portion can have a reinforced concrete layer and a steel liner. Next, an exterior portion of the container assembly can be assembled on the interior portion. The exterior portion can include a composite material and prestressed wires. The exterior portion can be covered with an insulation layer.

A tank holding device includes a band configured to tighten a hydrogen tank. The band includes a band-shaped base portion extending along an outer circumference of the hydrogen tank, and a plurality of pressing portions projecting from both sides of the base portion in a width direction orthogonal to a longitudinal direction of the base portion and configured to apply a pressing force to an outer peripheral surface of the hydrogen tank by elastically deforming in abutment against the outer peripheral surface of the hydrogen tank. At least an elastic member is provided in a gap between the band and the hydrogen tank to fill the gap.