A high-pressure gas tank module may include: a gas tank which stores high-pressure gas, the tank including a cylindrical side wall extending along a center axis of the tank, and an end wall located at an end of the side wall, wherein the end wall is curved outward in a dome-shape; a protector fixed on an outer surface of the end wall; and a boss located on the center axis and fixed on an inner surface of the end wall. The boss includes a joining surface joined to the inner surface, the protector includes a facing surface facing the end wall, wherein the facing surface includes a joining area joined to the outer surface and a non-joining area extending along the outer surface from the joining area toward the side wall, and the joining area faces the joining surface with the end wall interposed therebetween.

A pressurized gas tank comprises at least two cylinders and a rail capable of fluidly connecting the at least two cylinders. At least one cylinder includes a base for connection to the rail. The rail includes at least one reception area of a shape substantially complementary to a shape of the base. The base has a shape substantially revolutionary about a first axis and comprises a number at least equal to n of angularly equidistant tapped holes . The at least one reception area comprises a number equal to n of ports, in the form of an arc of a circle, angularly equidistant, of width substantially equal, by greater value, to a diameter of a tapped hole and of angular extent substantially equal to 360°/n.

A cryogenic fluid pressure vessel for an aircraft, having: a first wall layer, which contains carbon fiber-reinforced plastic, having an inner contact surface for the contact with a pressurized cryogenic fluid to be accommodated inside the cryogenic fluid pressure vessel; a second wall layer, which is arranged on an outer surface of the first wall layer and has a thermal barrier; a closable inlet/outlet opening for cryogenic fluid, which extends through the first and the second wall layer; and a structural insert integrated in the first and the second wall layer, which has a fastening connecting piece located on the outside of the cryogenic fluid pressure vessel for mechanically coupling the cryogenic fluid pressure vessel with external structures; wherein the cryogenic fluid pressure vessel forms an essentially cylindrical main body. Furthermore, the present invention provides an aircraft having such a cryogenic fluid pressure vessel.

A hydrogen storage system may include a storage container storing liquid hydrogen, a supply line connected to the storage container and to a fuel cell system, the supply line supplying gaseous hydrogen to the fuel cell system from the storage container, a compressor mounted in the supply line and compressing the gaseous hydrogen, a bypass line connecting the supply line and the storage container and allowing the gaseous hydrogen to flow from the supply line to the storage container, a control valve mounted in the bypass line and selectively adjusting a bypass flow rate of the gaseous hydrogen, an orifice provided in the bypass line, and a controller configured to control the control valve, accurately adjusting a supply pressure of the storage container and a supply amount of the hydrogen to be supplied to the fuel cell system based on the operation conditions of the fuel cell system.

A method of manufacturing a pressure vessel, may include a preparation step of preparing a boss made of metal; a processing step of processing a concave-convex pattern on an external surface of the boss; and a winding step of winding a reinforcing material around an external surface of a liner including the boss so that the reinforcing material is disposed on the concave-convex pattern, improving quality and durability of the pressure vessel and reducing a defect rate.

A dynamic control valve assembly for use in filling a liquid carbon dioxide storage and gas delivery system is provided, the assembly comprising: a valve body; an end nut with an inlet port for receiving liquid carbon dioxide; a chamber; an inlet cavity; a liquid port; a gas port; and a dynamic compound valve stem assembly for blocking the gas port while liquid carbon dioxide is delivered through the inlet port and allowing the liquid carbon dioxide to flow through the liquid port for storage in a liquid cylinder, and open the gas port and block the inlet port in order to allow carbon dioxide gasses from boiling liquid carbon dioxide within the liquid cylinder to pass through the gas port for storage in a gas cylinder until system pressure and temperature equilibrium is reached. The dynamic compound valve stem assembly comprises: a stem body having an inlet port poppet and a gas port poppet; an inlet cavity collar; and in some embodiments a collar biasing spring. The compound valve assembly is adapted to block the inlet port upon completion of the delivery of liquid carbon to the system when the system has an initial low pressure. The carbon dioxide gas may then be drawn from the gas cylinder for use in use in carbonated beverages and other applications such as agricultural and medical uses.

A method for performing pressure tests on a composite pressure vessel, including providing a composite pressure vessel with at least one opening an injection of a liquid; injecting the liquid in the composite pressure vessel through the at least one opening to reach a threshold pressure; measuring an external volume variation of the composite pressure vessel; draining the liquid from the composite pressure vessel through the at least one opening; and drying an inside cavity of the composite pressure vessel with a drying gas. The drying the inside cavity of the composite pressure vessel is performed at a pressure inside the composite pressure vessel, which is lower than an external pressure. A device for manufacturing and pressure testing a composite pressure vessel.

A tank container for storing gases, in particular for storing hydrogen in a motor vehicle. The tank container includes a main body which is preferably tubular, and comprises reinforcement elements which are arranged on a wall of the main body and are produced using an additive manufacturing process.

A pressurized-gas storage vessel includes a liner defining a chamber therein, the chamber being configured to receive a gas; a first wrapping surrounding the liner; and a second wrapping surrounding the liner. Methods of manufacturing and using the storage vessel are also disclosed.

A pigtail hose is described for connecting a gas canister to a gas regulator. The pigtail hose includes a gas hose having an inlet end and an outlet end; and an elbow fitting connected to the inlet end of the gas hose. The elbow fitting has a bore which turns the gas supply through 90° at a convenient point of the gas supply assembly to assist with the connection of the canister in a confined storage space.