Gaseous Storage Systems
Cylinders - Hydrogen cylinders should be stored outside at a safe distance from structures, ventilation intakes, and vehicle routes, even while in use. Best practices call for compressed hydrogen bottles supplying a manifold to be located outside, with brazed/welded lines to connect to indoor equipment.
Outside Cylinder Storage
(Photo courtesy of PNNL)
Vessels - Storage vessels for compressed hydrogen gas should be designed, constructed, tested, and maintained in accordance with applicable codes and standards.
Liquid Storage Systems
Liquid hydrogen is usually stored in horizontal or vertical cylindrical tanks. Spherical tanks are sometimes used for larger volumes. Tanks are vacuum-insulated and contain redundant pressure-relief devices as a safety precaution to prevent over pressurization.
Liquid Hydrogen Storage Tank
(Photo courtesy of NREL)