Patents Assigned to L'Air Liquide Societe Anonyme pour l'Etude et l'Exoloitation des Procedes Georqes Claude
  • Patent number: 10465981
    Abstract: A device for refrigerating and/or liquefying a working gas comprising helium, the device comprising a looped working circuit for the working gas includes, in series, a compression station, a cold box, a heat exchange system exchanging heat between the cooled working gas and a user, the device further comprising an additional pre-cooling system comprising at least one tank of auxiliary cryogenic fluid, such as liquid nitrogen, the cold box comprising a first cooling stage of the working gas comprising a first exchanger disposed at the output of the compression station as well as a second heat exchanger and a third heat exchanger, the first heat exchanger being of the aluminum plate-fin type, the second heat exchanger being of the tube or welded plate type, characterized in that the second and third heat exchangers are connected both serially and in parallel on the working circuit downstream of the first heat exchanger.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: November 5, 2019
    Assignee: L'Air Liquide Societe Anonyme pour l'Etude et l'Exoloitation des Procedes Georqes Claude
    Inventors: Jean-Marc Bernhardt, Fabien Durand, Vincent Heloin, Pierre Barjhoux, Gilles Flavien