L'air Liquide, Soci&#xe9;t&#xe9; Anonyme Pour L'etude Et L'exploitation Des Proc&#xe9;d&#xe9;s Georges Claude

Gerald Aigouy

Jean-Marc Bernhardt

Pierre Briend

James Butterworth

Eric Fauve

David Grillot

Cindy Deschildre

Franck Delcayre

Vincent Heloin

Jonathan Buquet

Thierry Trollier

Benoit Debray

Jean Christophe Rey

A device for filling a tank with a pressurized gas, in particular with pressurized hydrogen, comprising a pressurized-gas source and a circuit for transferring gas from the source to the tank, the transfer circuit including a member for expanding and cooling the gas in order to lower the pressure and temperature of the gas from the source to respective values determined with a view to filling the tank, characterized in that the gas-expansion and cooling member includes a refrigerator that expands the gas by means of a Stirling or Ericsson thermodynamic cycle, the refrigerator being selectively supplied with gas from the source, and in that at least a portion of the cooled and expanded gas supplied to the tank is extracted from the refrigerator.

Tank filling device and method

A method for the pulsating load refrigeration of a component of a Tokamak using a refrigeration device subjecting a working fluid to a working cycle. At least one 'periodic and symmetrical' operating mode of the Tokamak includes an operating mode in which plasmas of preset duration Dp are generated periodically with intervals of duration Dnp between two successive plasmas. Dnp=Dp&#xb1;30%. The cooling device cooling power is increased to a relatively high level in a plasma generation phase and reduced to a relatively low level when the Tokamak is no longer in a plasma generation phase. The refrigerating power variation brings gradual increases and reductions in refrigerating power. The increase in the refrigeration device refrigerating power is triggered in advance, in response to a signal (S) generated during a plasma starting step before the thermal load on the component increases.

Refrigeration method and apparatus with a pulsating load

The invention relates to a method and device for pulsed charge cooling of a component of a Tokamak. The method uses a refrigeration device that subjects a working fluid such as helium to a work cycle including: compression, cooling, and decompression, as well as heat exchange with the member and heating. The refrigeration power produced by the refrigeration device is increased to a relatively high level when the Tokamak is in a plasma generation phase and is decreased to a relatively low level when the Tokamak is no longer in a plasma generation phase. The increase in refrigeration power produced by the refrigeration device is automatically triggered in response to a signal produced during a step for starting plasma in the Tokamak.

Method and equipment for pulsed charge cooling of a component of a tokomak

A linear electrodynamic-type motor, for compressing a fluid circulating in a cryocooler notably using a Stirling cycle, includes a translationally movable induction coil; a power-supply circuit adapted to deliver, to at least one induction coil, an AC power-supply current; a movable mass adopting a translational movement; an induction coil arranged so as to move a respective movable mass between a first position and a second position where the movable mass can compress the fluid; and a secondary circuit arranged to connect the terminals of at least one induction coil in short-circuit. The secondary circuit comprises a compensation component for producing a phase shift between the power-supply voltage and the power-supply current, so as to reduce the phase difference that the inductance of the induction coil produces.

Linear electrodynamic-type motor, cryocooler including such a motor and method implementing such a motor

The invention relates to a method for absorbing the displacement, under the influence of an external force, of at least one plunger () in a linear electrodynamic motor comprising a least an induction coil () magnetically coupled with the plunger. Said method comprises the steps of: detecting in said induction coil a current induced (I') amplified relative to the induced current. The invention can be applied to cryogenic machines on board space ships.

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La Croix de la Rochette, France

Gerald Aigouy