The disclosure relates to a storage device for storing gas and supplying a consumer with different gas pressure levels, comprising at least one low-pressure storage tank and at least one high-pressure storage tank. According to the disclosure, the low-pressure storage tank is connected to a low-pressure connection via a switchable first valve and the high-pressure storage tank is connected to a high-pressure connection via a switchable second valve, wherein it is possible to provide a connected consumer with a higher gas pressure level via the high-pressure connection than via the low-pressure connection. The low-pressure connection and the high-pressure connection are connected to each other via a switchable third valve. Furthermore, the tanks are connected to each other via a fourth valve. The valves are switchable in such a way that the low-pressure storage tank can be emptied to a lower minimum pressure level than the high-pressure storage tank.

Systems and methods for optimizing the recondensation of boiloff gas in liquid natural gas storage tanks are presented. In especially preferred aspects of the inventive subject matter, BOG from a storage tank is condensed using refrigeration content of a portion of LNG sendout in a direct or indirect manner, and the BOG condensate and LNG sendout portion are combined to form a subcooled stream that is then combined with the balance of the LNG sendout, to be fed to a high pressure pump. Contemplated recondensation operations advantageously occur without using otherwise needed large volume recondensers. Moreover, the condensing and subcooling operations are decoupled from the LNG sendout rate.

A hydrogen boil-off gas recovery method, comprises liquefying hydrogen by cooling a hydrogen feed stream in a first cryogenic cold box, further cooling the hydrogen in a second cryogenic cold box, liquefying the hydrogen in the second cryogenic cold box or downstream thereof, providing liquefied hydrogen a loading bay containing at least one hydrogen transport truck, sending boil-off gas from at least one hydrogen transport truck in the loading bay to which liquefied hydrogen has been provided to an indirect heat exchanger outside the first and second cryogenic cold boxes in order to warm the boil-off gas and mixing at least part of the warmed boil-off gas with the hydrogen feed stream upstream of the first cryogenic cold box or with hydrogen in a hydrogen refrigeration cycle used to provide refrigeration for the second cryogenic cold box as a function of the pressure of the boil-off gas.

A system for dispensing a cryogenic fluid includes a bulk tank containing a supply of cryogenic fluid. A heating circuit includes an intermediate tank and a heating device and has an inlet in fluid communication with the bulk tank and an outlet. A bypass junction is positioned between the bulk tank and the inlet of the heating circuit. A bypass circuit has an inlet in fluid communication with the bypass junction and an outlet so that a portion of cryogenic fluid from the bulk tank flows through the heating circuit and is warmed and a portion flows through the bypass circuit. A mixing junction is in fluid communication with the outlets of the bypass circuit and the heating circuit so that warmed cryogenic fluid from the heating circuit is mixed with cryogenic fluid from the bypass circuit so that the cryogenic fluid is conditioned. A dispensing line is in fluid communication with the mixing junction so that the conditioned cryogenic fluid may be dispensed. Warmed cryogenic fluid remaining in the heating circuit after dispensing is directed to the intermediate tank and used to warm cryogenic fluid directed through the heating circuit.

A device and a method for keeping a liquefied gas store cold having a cryogenic refrigerator, a subcooling circuit having an aspiration end intended to be seated in a liquefied gas store, a heat exchanger exchanging heat between the aspirated subcooling circuit and the refrigerator, the subcooling circuit having at least one injection end configured to inject the fluid cooled in the heat exchanger into the store, the device further including a boil-off gas recovery pipe having an upstream end intended to be connected to the store to recover the boil-off gas, the recovery pipe comprising a downstream end intended to be connected to a consumer, the device having a bypass pipe and a set of valves configured to enable boil-off gas to be transferred from the recovery pipe to the subcooling circuit.

In the case of a storage vessel of cryogenic gas or cryogenic compressed gas, particularly a cryo-pressure tank for a motor vehicle, having a storage volume for accommodating the stored gas, a mixing device is provided in the storage volume for mixing the gas stored in the storage volume.

Disclosed are a boil-off gas treatment system and method. The boil-off gas treatment system includes: a compressor compressing boil-off gas generated in a storage tank provided to a ship or a marine structure; a compressed gas heat exchanger disposed downstream of the compressor and performing heat exchange of the compressed boil-off gas with seawater or fresh water; and a boil-off gas heat exchanger disposed downstream of the compressed gas heat exchanger and performing heat exchanged of the compressed boil-off gas with boil-off gas to be supplied to the compressor.

An apparatus for fuel dispensing and a process for fuel dispensing can be configured to facilitate rapid fueling. In some embodiments, at least one compressor can be cooled down via sequential adjustment for venting to facilitate improved compressor and supply line cool down that can utilize less vented gas and also help improve the speed at which a sufficient cool down can be provided. Some embodiments can alternatively (or also) utilize a sequential supply line utilization scheme for feeding fuel from a cooled down and operational compressor to a dispenser for feeding to a fuel tank. A control system can be configured to oversee operation and control adjustment of how supply lines are utilized based on at least one pre-determined control scheme for venting and/or fueling via the supply line(s) as well.

An apparatus for fuel dispensing and a process for fuel dispensing can be configured to facilitate rapid fueling. In some embodiments, at least one compressor can be cooled down via sequential adjustment for venting to facilitate improved compressor and supply line cool down that can utilize less vented gas and also help improve the speed at which a sufficient cool down can be provided. Some embodiments can alternatively (or also) utilize a sequential supply line utilization scheme for feeding fuel from a cooled down and operational compressor to a dispenser for feeding to a fuel tank. A control system can be configured to oversee operation and control adjustment of how supply lines are utilized based on at least one pre-determined control scheme for venting and/or fueling via the supply line(s) as well.