A method for filling a high-pressure gas accumulator from a reservoir is provided, comprising: removing the gas from the reservoir, transporting the gas through a gas line to a jet pump coupled to the interior of the high-pressure gas accumulator, and generating a ring flow guided along the inside of the wall of the high-pressure gas accumulator. A high-pressure gas accumulator that is suitable for carrying out the method and has a casing having a heat-sensitive layer on the inside, and has an inlet opening that traverses the casing and the layer, wherein a jet pump coupled to the inlet opening is arranged within the casing, and wherein the jet pump is oriented to generate a guided flow to the wall of the casing opposite the jet pump with deflection therein into a ring flow flowing along the heat-sensitive layer.

A system for circulating air through double pipes for supplying gas, includes double pipes connected to a gas handling device and supplied with gas; a gas supply unit for supplying gas to the gas handling device through an inner pipe of the double pipes; an air supply unit for supplying air through an outer pipe of the double pipes; and an air suctioning means for suctioning and circulating the air, which is supplied to the outer pipe by the air supply unit, by the introduction of a high pressure fluid. Rather than circulating air through the outer pipe of the double pipes by a fan, air can be circulated through the double pipes for gas supply by a simpler structure and more effective configuration.

A high pressure container unit includes a container body configured to store high pressure gas, a case storing the container body inside the case, a pipe connected with the container body and extending to an outside of the case, a closing member that is configured to close the pipe and allow the high pressure gas stored in the container body to be discharged from the pipe when a given condition is satisfied, and a ventilation mechanism that discharges air inside the case to the outside of the case with use of pressure of the discharged high pressure gas when the given condition is satisfied.

A type IV conformable pressure vessel is provided comprising an elongated folded tank and a valve assembly configured to pass fluid into and out of an interior of the tank through first and second filling couplers directly connected to a respective first and second end of the tank. The tank has at least two chambers for the storage of fluid. The valve assembly receives fluid from an external source, selectively provides the external fluid through a Venturi nozzle into a mixing chamber, recirculates fluid from the second end of the tank into the mixing chamber, and delivers the mixture of the recirculated fluid and the external fluid to the first end of the tank.

A liquid hydrogen reservoir and a method for operating a liquid hydrogen reservoir. The liquid hydrogen reservoir includes a cryostatic container operable to hold liquid hydrogen; a discharge line operable to discharge gaseous hydrogen in the cryostatic container; a boil-off management system (BMS), a return line, and a boil-off valve (BOV). The BMS that includes a mixing chamber operable to mix the gaseous hydrogen with ambient air, a catalyst arranged downstream of the mixing chamber and operable for a catalytic conversion of the gaseous hydrogen with the ambient air, and an exhaust gas line arranged downstream of the catalyst and operable to discharge the gas stream to the environment. The return line is operable to connect the exhaust gas line to the mixing chamber to facilitate a return flow of at least a partial stream of the exhaust gas line into the mixing chamber.

Apparatus comprising a source of a first fluid (204), a fluid displacement device (210) for moving the first fluid from the source to a sealed storage chamber (214), means for introducing a second fluid (207), different from the first fluid into the first fluid prior to reaching the storage chamber, the arrangement being such that the sealed storage chamber receives a mixture of the first and second fluids under a pressure greater than the pressure at the point at which the second fluid is introduced into the first fluid and includes a first fluid outlet (220) for directing the first fluid separated from the second fluid in the storage chamber externally of the storage chamber.

A method for checking the sealing of a sealed tank for storing a liquefied gas at low temperature, the tank having an inner hull and a secondary sealing membrane, a secondary space that is arranged between the inner hull and the secondary sealing membrane, a primary sealing membrane and a primary space that is arranged between the primary sealing membrane and the secondary sealing membrane is disclosed. The method has the following main steps: generating a pressure lower than the pressure of the primary space in the secondary space using a suction device, measuring the temperature of an outer surface of the inner hull, and detecting the location of a sealing defect of the secondary sealing membrane in the form of a cold spot on the outer surface of the inner hull.

Disclosed herein is a filling device for filling a storage tank with compressed hydrogen. Also disclosed are storage tanks including the filling device, as well as methods for filling a hydrogen tank with compressed hydrogen.

A cryogenic full containment storage tank for realizing a low-liquid-level material extraction function by using a pump column, comprising an inner tank, an outer tank, a pump column, a submersible pump and a material pre-extraction device; wherein the material pre-extraction device comprises a cofferdam, a Venturi mixer, a backflow pipe, a return control valve, a lead-out pipeline and a liquid level detection system. The cryogenic full containment storage tank can make use of a low-temperature medium flowing back from the pump column to extract the low liquid level material outside the cofferdam into the cofferdam to form a local high liquid level and maintain the normal operation of the submersible pump.

A compression system and method for compression of a gas having a temperature greater than an underground soil temperature within the earth is described. The system includes a gas compressing vessel arranged underground within the earth. The gas compressing vessel has thermally conductive walls with a circular cross-section of an inner side. An outer side of the walls is surrounded by a layer of a thermally conductive material, so as to maintain the compressed gas within the gas compressing vessel at a temperature of the soil during air compression and storage. The system also includes a water supply vessel arranged underground within the earth and a water pressurization system arranged on a pressurized water pipeline connecting the water supply vessel to the gas compressing vessel. The system also includes a water flow distributor arranged within the gas compressing vessel including at least one nozzle configured to direct a stream of the water pumped into the gas compressing vessel along the inner side of the thermally conductive in the direction where the inner side has the circular cross-section.