A system for dispensing a cryogenic fluid includes a bulk storage tank configured to contain a supply of the cryogenic fluid. A heat exchanger coil is positioned in the headspace of at least one intermediate fluid tank, which contains an intermediate fluid, and is configured to receive and warm a cryogenic fluid from the bulk storage tank via heat exchange with intermediate fluid vapor in the headspace. A buffer tank receives fluid from the heat exchanger coil. A chiller coil is positioned within the intermediate fluid tank and is submerged within intermediate fluid liquid contained within the at least one intermediate fluid tank. The chiller coil receives fluid from the buffer tank and cools it via heat exchange with intermediate fluid liquid within which the chiller coil is submerged for dispensing.

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 hydrogen dispensing system includes a hydrogen storage tank for storing hydrogen gas, a turboexpander generator fluidly connected to the hydrogen storage tank, and a dispenser fluidly connected to the turboexpander generator. The turboexpander generator receives a flow of the hydrogen gas from the hydrogen storage tank at an inlet of the turboexpander generator, reduces a pressure and a temperature of the flow of hydrogen gas, and outputs the hydrogen gas to the dispenser.

Method for filling a tank with pressurized hydrogen via a filling station comprising at least one buffer container and a fluid circuit connected to said at least one buffer container, the circuit of the filling station comprising a first end connected to at least one source of hydrogen gas, the circuit comprising a second end fitted with a transfer pipe intended to be connected removably to the tank that is to be filled, the method involving a step of cooling the hydrogen supplied to the tank by transferring negative calories between a cold source and the hydrogen, the method being characterized in that it comprises a step of purifying the hydrogen supplied by the source in a purification member before transferring it to the at least one buffer container, and in that it comprises a step of transferring negative calories from said cold source to the hydrogen before and/or during the purification step.

Disclosed herein are a system and method which can control the generation rate of boil-off gas from liquefied hydrogen and can maintain the liquefied hydrogen storage tank at a low pressure. The method for controlling boil-off gas from liquefied hydrogen according to the present invention includes: at least two storage tanks storing liquefied hydrogen and each operated in a high-temperature mode or in a low-temperature mode, wherein the low-temperature mode includes: maintaining at least a portion of liquefied hydrogen stored in the storage tank at a first temperature being a densification temperature, and the high-temperature mode includes: maintaining at least a portion of liquefied hydrogen stored in the storage tank at a second temperature being a temperature exceeding a triple point of liquefied hydrogen through recovery of cold heat from liquefied hydrogen stored in the storage tank.

A power-saving type liquefied-gas-fuel ship includes: a liquefied gas storage tank storing liquefied gas; an engine using the liquefied gas stored in the liquefied gas storage tank or boil-off gas generated by spontaneous vaporization of the liquefied gas as fuel; a fuel feeder supplying the liquefied gas as fuel for the engine; a compressor compressing the boil-off gas to a pressure required for the engine; a heat exchanger cooling the remaining boil-off gas not supplied to the engine among the boil-off gas compressed by the compressor; a refrigerant circulation line in which the refrigerant supplied to the heat exchanger circulates; a refrigerant compressor compressing the refrigerant discharged from the heat exchanger after heat exchange in the heat exchanger; and a cold heat recovery device recovering cold heat of the liquefied gas supplied as fuel for the engine to cool the refrigerant compressed by the refrigerant compressor.

A method for liquid air and gas energy storage (LAGES) which integrates the processes of liquid air energy storage (LAES) and regasification of liquefied natural gas (LNG) at the Floating Storage, Regasification and Power (FSRP) facilities through the exchange of thermal energy between the streams of air and natural gas (NG) in their gaseous and liquid states and includes recovering a compression heat from air liquefier and low-grade waste heat of power train for LNG regasification with use of an intermediate heat carrier between the air and LNG streams and utilizing a cold thermal energy of liquid air being regasified for increase in LAGES operation efficiency through using a semi-closed CO.sub.2 bottoming cycle.

A cryogenic energy storage system comprises at least one cryogenic fluid storage tank having an output; a primary conduit through which a stream of cryogenic fluid may flow from the output of the fluid storage tank to an exhaust; a pump within the primary conduit downstream of the output of the tank for pressurising the cryogenic fluid stream; evaporative means within the primary conduit downstream of the pump for vaporising the pressurised cryogenic fluid stream; at least one expansion stage within the primary conduit downstream of the evaporative means for expanding the vaporised cryogenic fluid stream and for extracting work therefrom; a secondary conduit configured to divert at least a portion of the cryogenic fluid stream from the primary conduit and reintroduce it to the fluid storage tank; and pressure control means within the secondary conduit for controlling the flow of the diverted cryogenic fluid stream and thereby controlling the pressure within the tank. The secondary conduit is coupled to the primary conduit downstream of one or more of the at least one expansion stages.

A method and system of storing and transporting gases comprising mixing the gases with liquid natural gas to form a mixture. The mixture is a liquid-liquid mixture or slurry, and is stored in vessel configured for maintaining the mixture at a first location. The mixture is transported to a second location for storage in vessel for maintaining the mixture. The mixture is removed from the second location storage vessel for separation and use in additional processes.

Disclosed is a BOG reliquefaction system. The BOG reliquefaction system includes: a compressor compressing BOG; a heat exchanger cooling the BOG compressed by the compressor through heat exchange using BOG not compressed by the compressor as a refrigerant; a pressure reducer disposed downstream of the heat exchanger and reducing a pressure of fluid cooled by the heat exchanger; and a second oil filter disposed downstream of the pressure reducer, wherein the compressor includes at least one oil-lubrication type cylinder and the second oil filter is a cryogenic oil filter.