Method and apparatus for cooling an oxide superconducting coil

Details Method and apparatus for cooling an oxide superconducting coil Method and apparatus for cooling an oxide superconducting coil

H - Electricity

01

F

H01F 6/04 (2006.01) F17C 13/00 (2006.01) F25D 3/10 (2006.01) F25J 1/00 (2006.01) H01F 6/06 (2006.01)

Patent

CA 2088055

A method and an apparatus for cooling a superconducting material below the boiling point of liquid nitrogen by using liquid nitrogen as coolant. The cooling method of the invention can be used in two different modes, one under reduced pressure and the other under the atmospheric pressure. The former comprises a coil container which is in fact a vacuum vessel and the temperature of which is lowered by to the triple point of nitrogen by means of a vacuum pump. The latter comprises a coil container containing therein a cooling section of a freezer and the temperature of the coil container is lowered to the melting point of nitrogen by the freezer.

Méthode et appareil pour refroidir un matériau superconducteur sous le point d'ébullition de l'azote liquide en utilisant de l'azote liquide comme agent de refroidissement. La méthode de refroidissement visée par l'invention peut être utilisée de deux façons différentes, l'une est réalisée sous pression réduite et l'autre sous pression atmosphérique. La première fait appel à un boîtier de bobine qui est en fait une chambre à vide, dont la température peut être abaissée au point triple de l'azote au moyen d'une pompe à vide. La deuxième façon consiste à utiliser un boîtier de bobine renfermant la section de refroidissement d'un congélateur et la température de ce boîtier est abaissée jusqu'au point de fusion de l'azote par le congélateur.

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