A process for collection, storage and transport of boil off-gas from a liquefied natural gas storage tank. An ultra-low temperature, composite gas tank is provided to accept the boil-off gas and saturated vapor at ultra-low-temperatures in a range of about −80° C. to −45° C. (about −112° F. to −229° F.) and at high pressure of about 150 bar (about 2,175.5 psi). Boil off gas collected from liquefied natural gas storage at a pressure in a range of about 15 to 18 bar (217.5 psi to 261 psi) and at a temperature in of about −150° C. (about −238° F.). The ultra-low temperature, composite gas tank can hold the gas as it warms to ambient temperature. The process includes a liner step; a filament step; a wrap step; and a filling step. Optional steps include an insulation step; a fiber step; a layering step; a nozzle step; and a gas step.

A method for producing a high-pressure tank that can reduce the positional deviation of a wound fiber bundle. In the method for producing the high-pressure tank, the fiber bundle impregnated with an uncured thermosetting resin is wound around a liner for housing gas so as to form, on the liner, a reinforcing layer with a plurality of fiber-reinforced resin layers. The method for producing the high-pressure tank includes pressing an edge portion on at least one side along the longitudinal direction of the fiber bundle in the width direction of the fiber bundle to deform the edge portion so as to protrude in the thickness direction of the fiber bundle and thermally curing the thermosetting resin in the edge portion deformed so as to form a protruding portion in the edge portion, and forming the fiber-reinforced resin layers with the fiber bundle with the edge portion deformed.

A pressure vessel includes: a liner made of a resin and configured to store a pressurized fluid; and a reinforcing layer made of a fiber-reinforced resin provided around an outer peripheral surface of the liner. The liner includes a body portion having a tubular shape and a pair of side-end portions each having a domical shape. One of the side-end portions extends continuously from one of two ends of the body portion, and the other one of the side-end portions extends continuously from the other one of the two ends of the body portion. The liner includes a restriction portion provided at a center of the liner in an axial direction of the body portion. The restriction portion is configured to restrict displacement of the reinforcing layer in the axial direction.

A sectional inner liner of a pressure vessel comprising the sectional inner liner and an outer layer disposed around the sectional inner liner, the sectional inner liner comprising: at least two inner liner sections, wherein each inner liner section comprises an internal network structure; and at least two cap sections, wherein, the at least two cap sections and at least two inner liner sections are configured to assemble into a sectional inner liner.

A manufacturing method of a high-pressure tank includes a step of forming a first reinforcing body involving cooling a first resin-impregnated fiber bundle fed from a fiber bundle feeding device and having a first temperature to a second temperature lower than the first temperature and winding the cooled first resin-impregnated fiber bundle around a mandrel or a liner. The first resin-impregnated fiber bundle includes fine particles that contain an acrylic resin or a butadiene resin as a main component. A high-pressure tank including the liner that houses gas and the first reinforcing body that covers an outer surface of the liner is manufactured.

The invention relates to a pressure vessel with reinforced pole caps and a method for producing such a pressure vessel, which comprises an inner vessel of a cylinder-shaped central part and two dome-shaped pole caps closing the central part on both sides and an outer layer wound on the inner vessel for the reinforcement of the inner vessel against a pressure load, wherein the outer layer comprises at least one pole cap reinforcement layer and a pressure vessel reinforcement layer of fiber composite material, wherein the pole cap reinforcement layer at least partially covers the pole caps and the pressure vessel reinforcement layer covers the pole caps and the central part and a contour-stable preform is arranged as the pole cap reinforcement layer on at least one of the pole caps, preferably on both pole caps.

A pressure vessel includes curved sidewalls configured as a frame having a polygonal outline, a planar top side and a planar bottom side attached to the curved sidewalls forming a sealed pressure chamber therebetween. Each planar side includes a contoured surface having shaped pressure resistant features formed thereon. A preferred method for forming the pressure resistant features includes hydraulic pressurization to induce plastic strain. The pressure vessel also includes an array of internal support posts within the sealed pressure chamber attached to the planar sides in a geometrical pattern, such as a hexagonal array. The support posts can be solid metal cylinders, hollow tubes or tubes through which reinforcing materials, such as carbon fiber, glass fiber, or fiber/epoxy tape have been passed. A composite pressure vessel includes tubular internal support posts reinforced with reinforcing materials, as well as contoured surfaces and curved sidewalls reinforced with these same reinforcing materials.

A tank includes a liner that includes a barrel portion in a cylindrical shape and a pair of dome portions provided at both ends of the barrel portion in the axial direction, and a reinforcing layer that covers the liner and that is formed from a fiber reinforced resin formed by impregnating a fiber bundle with a resin. A portion of the reinforcing layer that covers the dome portions includes a radial arrangement layer in which fibers of the fiber bundle are arranged radially along the radial direction of the dome portions when seen in the direction of an axis of the tank.

A system for powering a vehicle is provided. The system can include an engine or power generation system to be powered by a fuel and a housing. The housing can be configured to couple to one or more frame rails of the vehicle, receive and protect a cylinder configured to store the fuel to be used by the engine or power generation system. The housing can have one or more access panels allowing access to an interior of the housing. The cylinder can include a first end portion, a second end portion, a central body forming an enclosed cavity for storing pressurized gas, a reinforcement structure disposed over the central body, and a metal foil interposed between the reinforcement structure and central body. The metal foil can be configured to reduce permeation of contents of the cylinder.

A system for powering a vehicle is provided. The system can include an engine or power generation system to be powered by a fuel and a housing. The housing can be configured to couple to one or more frame rails of the vehicle, receive and protect a cylinder configured to store the fuel to be used by the engine or power generation system. The housing can have one or more access panels allowing access to an interior of the housing. The cylinder can include a first end portion, a second end portion, a central body forming an enclosed cavity for storing pressurized gas, a reinforcement structure disposed over the central body, and a metal foil interposed between the reinforcement structure and central body. The metal foil can be configured to reduce permeation of contents of the cylinder.