A small scale natural gas liquefaction plant is integrated with an LNG loading facility in which natural gas is liquefied using a multi-stage gas expansion cycle. LNG is then loaded onto an LNG truck or other LNG transport vehicle at the loading facility using a differential pressure control system that uses compressed boil off gas as a motive force to move the LNG from the LNG storage tank to the LNG truck so as to avoid the use of an LNG pump and associated equipment as well as to avoid venting of boil off vapors into the environment.

Compressed gas dispensing methods using cascade dispensing from a first plurality of storage vessels and a second plurality of storage vessels. A compressor is used to provide very high pressure compressed gas for the second plurality of pressure storage vessels. Various methods are described for different sources of the compressed gas. The methods are particularly suitable for dispensing hydrogen into storage vessels in vehicles.

The disclosure generally describes a method for venting pressurized hydrogen gas from a device for simulating a refueling operation for a fuel cell electric vehicle (FCEV).

[Object] To enable a gas supply system to be easily transported and to increase a degree of freedom when the gas supply system is installed.

[Solution] A hydrogen station includes: a filling facility for filling a tank-mounted device with a gas; and a gas supply system for supplying the gas to the filling facility. The gas supply system includes: a compressor for compressing the gas; a compressor accommodating body for accommodating the compressor; a refrigerator for cooling the gas flowed into the filling facility or the gas just before being flowed into the filling facility, the refrigerator including an evaporation part, an expansion part, and a compression part; and a cooler accommodating body for accommodating the evaporation part, the expansion part, and the compression part. The compressor accommodating body and the cooler accommodating body are detachable from each other.

A cryogenic liquid dispensing system having a tank that holds cryogenic liquid and a basin configured to hold cryogenic liquid at a height above a bottom portion of the tank. The system is configured to pump cryogenic liquid for dispensing from the bottom portion of the tank when the cryogenic liquid in the tank is of a sufficient level to provide an adequate liquid head to permit pump operation, and is configured to pump cryogenic liquid for dispensing from the basin when the liquid in the tank is of an insufficient level to provide an adequate liquid head to permit pump operation to dispense cryogenic liquid.

The filling station according to the invention enables an automated refilling of a gas bottle by an end-user. This comprises an insertion device, which enables an end-user to insert an emptied gas bottle into the filling station. The filling station comprises a closing device for closing the filling station after the insertion of the gas bottle such that a removal of the gas bottle subsequent to the closing is not possible. The end-user may not remove the gas bottle in a closed state. Furthermore, the filling station comprises a filling device for an automated filling of an into the filling station inserted emptied gas bottle subsequent to the closing. A filling may thus only take place, if the filling station is closed and in consequence the gas bottle cannot be removed. There is a gas testing device for an automated gas leakage test after a refilling of an inserted gas bottle. With it, the tightness of a once again filled gas bottle is tested. There is a release device that releases an afore filled or full gas bottle only after a successful gas leakage test and thus enables a removal of a once again filled gas bottle. A removal of a gas bottled filled with gas respectively liquid gas is thus only possible, if the gas leakage test revealed that no gas escapes from the filled bottle. The invention further concerns a method for refilling.

A subterranean tank can consist of at least a casing string that has a containment section disposed between first and second end regions. The containment section may have a first width while each of the first and second end regions have a second width. The first width can be greater than the second width of the respective first or second end regions. The entire casing string may be sealed to maintain a gas at 5,000 psi or more until a gas delivery assembly attached to the first end region releases gas stored in the casing string.

A pressure vessel refueling system enables fast refueling of Compressed Natural Gas (CNG) fuel tanks. The system includes a pressure vessel having a gas inlet/outlet port and a liquid inlet/outlet port; a first liquid at least partially filling the pressure vessel; a liquid layer of a second liquid floating on top of the first liquid, wherein the second liquid is immiscible with the first liquid; a gas at least partially filling the pressure vessel above the liquid layer of the second liquid, the gas in fluid communication with the gas inlet/outlet; and a pump in fluid communication with the liquid inlet/outlet of the pressure vessel, whereby the first liquid can be pumped or returned to/from storage into or out of the pressure vessel.

A method of dispensing compressed natural gas (CNG) includes assigning a first priority to the filling of a first destination tank and assigning a second priority to the filling of a second destination tank. The second priority is lower than the first priority. The method also includes filling the first destination tank from a first CNG source while filling the second destination tank from a second CNG source. The second CNG source provides CNG at a lower pressure relative to the pressure at which the first CNG source provides CNG.

The invention relates to a HRS for filling a vessel of a vehicle with hydrogen, the HRS 1 comprising: a basic process control system comprising a process controller, a plurality of process measuring devices, a plurality of final process elements and a plurality of associated basic process control functions facilitating monitoring and controlling the operation of the HRS, wherein the HRS further comprises a safety instrumented system comprising a safety controller, a plurality of safety measuring devices, a plurality of final safety elements a plurality of associated safety instrumented functions, wherein at least one of the final process elements and the final safety elements facilitates tripping the operation of the HRS under the control of the associated process controller or the associated safety controller respectively.