A vehicle including a vehicle frame with an upper frame edge, a front axle with one front wheel, a rear axle with a rear wheel and a cryogenic container arranged laterally of the vehicle frame, and the cryogenic container is arranged in an installation space available, and a connection line runs to the cryogenic container or to an operating component of the cryogenic container located in the installation space through one of the following spandrels outside of the installation space available: through a rear wheel spandrel between the installation space and the rear wheel; through a front wheel spandrel between the installation space and the front wheel; through a lower construction spandrel between the installation space and an extruded triangle above the road; or, through a semi-trailer spandrel between the installation space and a pivoting region of a semi-trailer mounted on the vehicle.

A system for storing air at high pressure underground or underwater includes a plurality of arrays of air tanks, each tank configured to store compressed air at a pressure of at least 40 bar. A piping system connects between an outlet of each air tank, the piping system further including at least one central port for delivering compressed air to and from a respective array. A storage receptacle surrounds the arrays and piping system, protecting the arrays and piping system from an external environment, and thermally insulating the arrays and piping system. A liquid bath is arranged within the storage receptacle. A heat exchanger is configured to maintain a temperature of the liquid bath substantially constant. The storage receptacle may be comprised of plastic pieces welded together in a modular fashion. Each piece may be a cylindrical tube configured to receive therein one or more of the arrays.

A hydrogen supply method including a (1-1).sup.th fluid circulation operation in which a first fluid sequentially circulates through a first fluid circulation line including a first heat exchanger in which the first fluid and an external fluid exchange heat therebetween, a first flow rate control member that controls flow of the first fluid, a compressor, the first flow rate control member, a second heat exchanger, and an expansion member. The hydrogen supply method further includes a (2-1).sup.th fluid circulation operation in which a second fluid circulates through a second fluid circulation line through which the second fluid circulates and exchanges heat with the first fluid in the second heat exchanger.

To provide a gas filling device in which its assembly work is simplified by unitizing a housing body and the total number of assembly steps is reduced, thereby achieving high production efficiency. A gas filling device 100 according to the present invention including a lower unit 10 housing a heat exchanger 13 on a base frame 1; an intermediate unit 20 located above the lower unit 10 and housing a display; a top unit 30 located above the intermediate unit 20 and housing a flow meter 33; and side units 40 located on both sides of the lower unit 10 and the intermediate unit 20 and housing filling hoses having filling nozzles at their tips.