Abstract: The invention provides a cryogenic refrigeration installation comprising an enclosure with thermally conductive trays (thermal stages) and plates. A cooling system uses a refrigerator with a helium-based cycle fluid. The cycle circuit incorporates a first storage vessel for liquefied cycle fluid. After initial tray/plate cooling, a first bypass line with an expansion member diverts some cycle fluid to this vessel. Subsequently, the main cycle fluid is cooled by heat exchange with the liquefied fluid in said first vessel before further tray/plate cooling. A key feature is a second bypass line within the enclosure, which further expands a portion of this pre-cooled cycle fluid. This expansion generates an even colder flow (e.g., 1 K to 2 K) to cool an additional tray or plate, facilitating efficient multi-temperature cryogenic cooling.

Abstract: Device for pumping liquid hydrogen including, arranged in series between an inlet for fluid to be compressed and an outlet for compressed fluid, a first compression member with a piston forming a first compression stage and a second compression member with a piston forming a second compression stage. The first compression member compresses the liquid hydrogen to a supercritical state. The second compression member compresses the supercritical hydrogen from the first compression member to an increased pressure, in particular, between 200 and 1000 bar.

Abstract: A refrigeration device comprising a first working circuit for circulating a first working fluid, the first working circuit comprising the following elements connected in series by a first network of lines: a first compressor; a cooling unit; a third heat exchanger; a first Joule-Thomson expansion device; a first tank configured to be in heat exchange with an object to be cooled; the refrigeration device also comprising a thermally insulated enclosure and the first working circuit comprises a first pumping member connected to the first network of lines.

Abstract: Disclosed is a device for storing and supplying cryogenic fluid, in particular an on-board device for storing and supplying liquefied hydrogen, which device comprises a cryogenic storage tank for storing liquefied fluid, a bleed-off circuit, and a system for pressurizing the tank comprising a pressurizing duct having two ends respectively connected to the upper and lower portions of the tank, a vaporizing heat exchanger and a set of one or more valves configured so as to allow liquid to be bled from the tank, to be heated in the heat exchanger and to be fed back into the tank; the system for pressurizing the tank being configured so as to bleed off a predetermined volume of fluid from the tank, to store and to isolate this volume in the vaporizing heat exchanger until the volume of fluid reaches predetermined temperature and/or pressure conditions prior to reinjecting the volume of fluid into the tank; the pressurizing duct comprising a member for limiting the flow rate and/or the pressure of the volume of re

Abstract: Disclosed is a device for storing and supplying cryogenic fluid, in particular an on-board device for storing and supplying liquefied hydrogen, which device comprises a cryogenic storage tank for storing liquefied fluid, a bleed-off circuit, and a system for pressurizing the tank comprising a pressurizing duct having two ends respectively connected to the upper and lower portions of the tank, a vaporizing heat exchanger and a set of one or more valves configured so as to allow liquid to be bled from the tank, to be heated in the heat exchanger and to be fed back into the tank; the system for pressurizing the tank being configured so as to bleed off a predetermined volume of fluid from the tank, to store and to isolate this volume in the vaporizing heat exchanger until the volume of fluid reaches predetermined temperature and/or pressure conditions prior to reinjecting the volume of fluid into the tank; the pressurizing duct comprising a member for limiting the flow rate and/or the pressure of the volume of re

Abstract: Dilution refrigeration device and method comprising a loop working circuit containing a working fluid comprising a mixture of helium-3 (3He) and helium-4 (4He), the working circuit comprising, arranged in series and fluidically connected via a first set of pipes, a mixing chamber, an evaporator and transfer member, the first set of pipes being configured to transfer the working fluid from an outlet of the mixing chamber to an inlet of the evaporator and from an outlet of the evaporator to an inlet of the transfer member, the working circuit comprising a second set of pipes connecting an outlet of the transfer member to an inlet of the mixing chamber, the working circuit comprising at least a first heat-exchange portion for exchange of heat between at least part of the first set of pipes and the second set of pipes, the first heat-exchange portion being situated between the evaporator and the mixing chamber, the device further comprising at least one cooling member in a heat-exchange relationship with the work

Abstract: Device for pumping liquid hydrogen including, arranged in series between an inlet for fluid to be compressed and an outlet for compressed fluid, a first compression member with a piston forming a first compression stage and a second compression member with a piston forming a second compression stage. The first compression member compresses the liquid hydrogen to a supercritical state. The second compression member compresses the supercritical hydrogen from the first compression member to an increased pressure, in particular, between 200 and 1000 bar.

Abstract: Device and method for filling pressurized gas tanks, particularly vehicle pressurized hydrogen tanks, the device comprising a liquefied gas source, a transfer circuit comprising two parallel transfer lines each having an upstream end linked to the liquefied gas source, at least two separate downstream ends intended to be each removably connected to a tank to be filled, each of the two transfer lines comprising: a pump, a vaporizer for evaporating the pumped fluid, a branch for bypassing the vaporizer and a distribution valve(s) set configured to control the flow of fluid pumped and distributed between the vaporizer and the branch line, the device further comprising a storage buffer(s), which storage buffer(s) is(are) connected in parallel to each of the two transfer lines via a set of valves.

Abstract: Device and method for filling pressurized gas tanks, particularly vehicle pressurized hydrogen tanks, the device comprising a liquefied gas source, a transfer circuit comprising two parallel transfer lines each having an upstream end linked to the liquefied gas source, at least two separate downstream ends intended to be each removably connected to a tank to be filled, each of the two transfer lines comprising: a pump, a vaporizer for evaporating the pumped fluid, a branch for bypassing the vaporizer and a distribution valve(s) set configured to control the flow of fluid pumped and distributed between the vaporizer and the branch line, the device further comprising a storage buffer(s), which storage buffer(s) is(are) connected in parallel to each of the two transfer lines via a set of valves.

Abstract: Device and method for filling pressurized gas tanks, particularly vehicle pressurized hydrogen tanks, the device comprising a liquefied gas source, a transfer circuit comprising two parallel transfer lines each having an upstream end linked to the liquefied gas source, at least two separate downstream ends intended to be each removably connected to a tank to be filled, each of the two transfer lines comprising: a pump, a vaporizer for evaporating the pumped fluid, a branch for bypassing the vaporizer and a distribution valve(s) set configured to control the flow of fluid pumped and distributed between the vaporizer and the branch line, the device further comprising a storage buffer(s), which storage buffer(s) is(are) connected in parallel to each of the two transfer lines via a set of valves.