The invention primarily concerns a facility for storing and cooling a liquefied gas, for example a liquefied natural gas, the facility comprising at least one tank configured to contain the liquefied gas, a closed cooling circuit configured to be supplied with liquefied gas in the liquid state coming from the tank, at least one injection member configured for reinjecting cooled liquefied gas into the tank, the facility being characterized in that it comprises at least one connection line configured to recover a cooled gas from at least one remote container that is separate and independent from the facility.

A device and a method for recovering by-product oxygen from water-electrolysis hydrogen production using a low-temperature method are provided, solving the waste problem of by-product oxygen in the green water-electrolysis hydrogen production system. The device according to the present disclosure comprises an oxygen clarifying system, a pressurizing and heat exchanging system, and a circulating gas compression and expansion refrigeration system. The recovering method according to the present disclosure comprises the following steps: first clarifying and purifying the by-product oxygen from water-electrolysis hydrogen production is to remove hydrogen, carbon monoxide, carbon dioxide, water and other impurities in the oxygen; and then, liquefying, pressurizing and heat exchanging the pure oxygen to obtain the product oxygen and liquid oxygen with required pressure. In the whole process, the cooling capacity is provided by the circulating gas expansion refrigeration system.

A method for increasing the reliability and availability of a cryogenic fluid reliquefaction system is provided. Wherein the liquid cryogenic fluid is supplied to a cryogenic liquid user in the absence of a pump by elevating the storage height of the main cryogenic storage tank relative to the liquid cryogenic liquid user to a minimum predetermined height. Wherein the temperature of the liquid cryogenic fluid downstream of the sub-cooler is at least 1 degree Celsius above the freezing point of the cryogenic fluid at the internal pressure. The method also includes controlling the internal pressure of the main cryogenic tank by adjusting the recirculation flow to the, and maintaining the cold supply to the liquid cryogenic fluid user when the sub-cooling line is reduced or stopped by venting the vaporized cryogenic fluid.

Systems and methods are described for increasing capacity and efficiency of a nitrogen refrigerant boil-off gas recovery system for a natural gas storage tank. Boil-off gas is condensed against two-phase nitrogen in a condensing heat exchanger having an inner vessel through which the boil-off gas flows and an outer vessel through which the two phase nitrogen flows. Logic controls maintain storage tank pressure and power consumption within preferred levels by adjusting the pressure of the two-phase nitrogen in the heat exchanger. Additional logic controls maintain the temperature difference between the nitrogen streams entering into and returning from the cold end of a second heat exchanger by controlling the position of an expansion valve on the return circuit.

The invention primarily concerns a facility for storing and cooling a liquefied gas, for example a liquefied natural gas, the facility comprising at least one tank configured to contain the liquefied gas, a closed cooling circuit configured to be supplied with liquefied gas in the liquid state coming from the tank, at least one injection member configured for reinjecting cooled liquefied gas into the tank, the facility being characterized in that it comprises at least one connection line configured to recover a cooled gas from at least one remote container that is separate and independent from the facility.

The device (100) for pre-cooling a flow (101) of a target gas to a temperature of less than or equal to 90 K comprises: a group (105) of at least two heat exchangers (106, 107, 108, 136) for exchanging heat between the target gas flow, a flow (102) of a first cooling fluid and at least one flow among a flow of a second cooling fluid and a flow of a third cooling fluid, closed circulation circuit (110) for a flow of a second cooling fluid, said fluid comprising at least methane, said circuit comprising: at least one compression stage (111, 112), at least one liquid-gas separation stage (115, 116) and at least one expansion stage (120, 121, 122) and a circulation circuit (125) for a flow of the third cooling fluid through at least one of said heat exchangers.

The device (100) for cooling a flow (101) of a target fluid predominantly comprising dihydrogen, comprises: a first heat exchanger (105) configured to cool an intermediate refrigerant fluid (110) by heat exchange with an expanded dioxygen flow (115), an intermediate closed circuit (120) for transporting the intermediate refrigerant fluid from the first heat exchanger to a second heat exchanger (125), a means (130) for compressing the intermediate refrigerant fluid along the intermediate closed circuit, the intermediate refrigerant fluid, configured to remain in the liquid or supercritical state at least upon passing through the compression means and the second heat exchanger configured to cool the target fluid flow by heat exchange with the intermediate refrigerant fluid cooled in the first heat exchanger.

Method for hydrogen liquefaction comprising at least one precooling step, wherein a hydrogen feed flow is cooled by a first refrigerant, a cooling step, wherein the hydrogen feed flow is cooled by a second refrigerant, and a step of expanding the hydrogen feed flow. Each of the first and second refrigerants is successively subjected to at least one compression and to at least one expansion in order to cool it, and a liquid phase of the first refrigerant cools the second refrigerant between at least three stages of said compression so that the second refrigerant does not exceed a temperature of 150 K, optionally 113 K, during said compression of the second refrigerant.

Station for supplying a flammable fluid fuel comprising a first cryogenic tank (2) for storing fuel in the form of a cryogenic liquid, a second cryogenic tank (3) for storing an inert gas, a cooling circuit (4, 14) in a heat-exchange relationship with the first tank (2), the cooling circuit (4, 14) comprising an upstream end connected to the second cryogenic tank (3) for drawing cryogenic fluid from the second cryogenic tank (3) in order to give up frigories from the fluid of the second cryogenic tank (3) to the first tank (2), the station comprising a circuit (7) for withdrawing fluid derived from the second tank (3), characterized in that the cooling circuit comprises two pipes (4, 14) comprising an upstream end connected to the second tank (3), the two pipes (4, 14) each being provided with a respective exchanger (9, 10) housed in the first tank (2), the two exchangers (9, 10) being respectively situated in the upper and lower parts of the first tank.

A method for condensing argon can include two flow streams interacting with each other in a heat exchanger found within a cold box: a stream of gaseous argon enters the heat exchanger to be cooled down below its liquefaction point by a stream of pressurized liquid nitrogen entering the heat exchanger. While passing through the heat exchanger, gaseous argon is gradually cooled down until it is condensed into liquid, flowing by gravity to the nearby liquid argon storage tank.