An apparatus and process for liquid oxygen production can be configured to avoid use of a feed compressor and a recycle compressor. Embodiments can be configured for open loop operation so that a relatively low yield liquid oxygen recovery can be obtained from a feed output from an electrolyzer that is comprised mostly of oxygen (e.g. at least 80 volume percent oxygen, between 80 vol % and 100 vol % oxygen, etc.). The relatively low yield liquid oxygen recovery can be surprisingly provided to permit an advantageous recovery of oxygen to limit waste oxygen that may ultimately be vented while also minimizing equipment and power requirements for the liquid oxygen recovery.

The extrusion device of a solid film comprises a cell provided with an input opening of a material designed to form the solid film, and an output opening of the solid film from the cell. The device comprises a first heat exchanger for applying a first temperature to the output opening and a second heat exchanger for applying a second temperature in a first zone of the cell distinct from the output opening and a control circuit imposing first and second sets of first and second temperatures. The first set enables a volume of the material in solid phase to be formed. The second set enables a temperature gradient to be generated in the volume so as to generate a pressure forcing extrusion of the solid film via the output opening.

The invention relates to an installation for producing liquefied gas comprising a circuit for supplying feed gas, a set of heat exchangers, a refrigerator for cooling some or all of the set of heat exchangers, the supply circuit comprising, between the set of heat exchangers and the downstream end thereof, a final expansion turbine for expanding the feed gas in liquid state, the supply circuit comprising a bypass line of the final expansion turbine fitted with a first expansion valve, a second expansion valve disposed in series upstream or downstream of the first expansion valve and of the final expansion turbine, an additional heat exchange line designed to exchange heat with a heat exchanger of the set of heat exchangers when the feed gas is expanded by the first expansion valve via the bypass line, the additional heat exchange line carrying out this heat exchange with said heat exchanger between the expansion carried out by the first expansion valve and the expansion carried out by the second expansion valve, the additional heat exchange line being located upstream or respectively downstream of the expansion carried out by the first expansion valve.

A fluid is liquefied from a gaseous state to a liquid state, and the liquefied fluid is stored. In one embodiment, the fluid is oxygen. Mechanisms are employed that enhance the durability, longevity, reliability, efficiency, of a system used to liquefy the fluid.

A fluid is liquefied from a gaseous state to a liquid state, and the liquefied fluid is stored. In one embodiment, the fluid is oxygen. Mechanisms are employed that enhance the durability, longevity, reliability, efficiency, of a system used to liquefy the fluid.

A method of vapor recovery is provided. One embodiment of the method of vapor recovery includes providing a combined gas phase and liquid phase fluid, by way of a pipe, wherein the pipe comprises a gas vent. Then removing at least a portion of the gas phase fluid with the gas vent. Then compressing the removed portion of gas phase fluid, thereby forming compressed gas stream. And finally accumulating the compressed gas stream in a storage tank downstream of the compressor.

The present invention relates to a single cycle mixed refrigerant process for industrial cooling applications, for example, the liquefaction of natural gas. The present invention also relates to a refrigeration assembly configured to implement the processes defined herein and a mixed refrigerant composition usable in such processes.

A method for controlling an oxygen liquefaction device includes measuring a flow rate from an oxygen concentration subsystem to a liquefaction subsystem, comparing the flow rate to a flow rate setpoint, and adjusting a cycle timing of the oxygen concentration subsystem in accordance with the comparing. A device for producing liquid oxygen, includes an oxygen concentrator, a liquefaction system, that receives oxygen enriched gas from the concentrator, and condenses it to produce a liquid product. The device further includes a liquid product storage tank, a sensor, that measures a flow rate from the oxygen concentrator to the liquefaction system and a controller that adjusts an oxygen concentrating cycle time in response to the measured flow rate.

The invention relates to a method for providing high-pressure oxygen using low-pressure oxygen containing water, in which method the low-pressure oxygen is subjected to a drying process and subsequently to a pressure increase, the drying process comprising an adsorption step. In the adsorption step, a regeneration gas is used which is provided using oxygen that is provided using the pressure increase and using at least part of the low-pressure oxygen. The pressure increase is performed above 0 C. and using a plurality of compressors or compressor stages which have an intercooler between two compressors and/or compressor stages. At least part of the oxygen which is used to form the regeneration gas is removed from the pressure increase between two of the compressors or compressor stages upstream of the intercooler. Alternatively, the pressure increase is carried out by means of internal compression.

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.