DEVICE AND METHOD FOR LIQUEFYING A GAS

• Main Authors: DURI, Davide, CHABERNAUD, Pierre, HAMZA, Filali, LINOTTE, Rémi, PENIN, Loïc, JALIA, Florian
• Format: Patent
• Language: English; French
• Published: 29.06.2023
• Subjects: BLASTING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; MIXTURES BY PRESSURE AND COLD TREATMENT; REFRIGERATION OR COOLING; WEAPONS

The invention relates to a device (200) for liquefying a gas (51), the device comprising: - a circuit (55) for conveying gas to be liquefied, the circuit comprising at least one heat exchanger (204) for exchanging heat between the gas (51) to be liquefied and a refrigerant flow (52) comprising at least dihydrogen refrigerant; - a closed refrigeration circuit (210) configured to convey the refrigerant flow, the closed refrigeration circuit comprising a means (215) for maintaining an internal composition of the dihydrogen refrigerant at a ratio of parahydrogen to orthohydrogen that is lower or higher than the ratio corresponding to a natural equilibrium composition in the refrigerant flow closed circuit, the means (215) comprising a catalytic reactor (220) configured to convert some of the orthohydrogen from the dihydrogen refrigerant flow into parahydrogen or vice versa. Le dispositif (200) de liquéfaction d'un gaz (51), comporte : - un circuit (55) de transport de gaz à liquéfier comportant au moins un échangeur (204) de chaleur entre le gaz (51) à liquéfier et un flux (52) frigorigène comportant au moins du dihydrogène frigorigène, - un circuit (210) fermé de réfrigération configuré pour transporter le flux frigorigène, le circuit fermé de réfrigération comportant un moyen (215) de maintien d'une composition interne du dihydrogène frigorigène selon un rapport de parahydrogène sur orthohydrogène inférieur ou supérieur au dit rapport correspondant à une composition naturelle d'équilibre dans le circuit fermé de flux frigorigène, ledit moyen de maintien comportant un réacteur (220) catalytique configuré pour convertir une partie de l'orthohydrogène du flux de dihydrogène frigorigène en parahydrogène ou inversement.