System having a superconductive cable

Abstract

A system is provided having a superconductive cable (KA) which consists of a superconductive inner conductor ( 1 ), a screen arranged concentrically therewith and a dielectric applied ( 3 ) between the inner conductor and the screen. The screen (S) is constructed from a superconductive part ( 4 ) and a part ( 5 ) consisting of an electrically highly conductive material enclosing the latter, and in which the screen is enclosed with the inclusion of an intermediate space ( 9 ), used for feeding a liquid refrigerant through, by a cryostat (KR) which consists of two stainless steel tubes ( 6, 7 ) extending concentrically with one another and separated from one another by an intermediate space ( 8 ). In order to protect against abrasion of metallic parts, the surface of the screen (S) of the cable (KA), which is enclosed by the cryostat (KR), and/or of the cryostat (KR) is provided all around on its inner surface with a liner layer ( 10 ) made of an abrasion-resistant material with a lower friction coefficient compared with steel, which, when it encloses the screen (S) of the cable (KA), is permeable for the refrigerant.

1 . System having a superconductive cable comprising:
 a superconductive inner conductor;   a screen arranged concentrically therewith; and   a dielectric applied between the inner conductor and the screen, in which the screen is constructed from a superconductive part and a part made from an electrically highly conductive material enclosing the latter, and in which the screen is enclosed with the inclusion of an intermediate space, used for feeding a liquid refrigerant through, by a cryostat which has two stainless steel tubes extending concentrically with one another and separated from one another by an intermediate space, which is evacuated and provided with superinsulation,   wherein the surface of the screen of the cable, which is enclosed by the cryostat, and/or of the cryostat is provided all around on its inner surface with a liner layer made of an abrasion-resistant material with a lower friction coefficient compared with steel, and   a corresponding liner layer enclosing the screen of the cable is permeable for the refrigerant.   
     
     
         2 . System according to  claim 1 , wherein the liner layer is made from bronze. 
     
     
         3 . System according to  claim 1 , wherein the liner layer enclosing the screen of the cable includes a bronze strip wound around the screen with a gap. 
     
     
         4 . System according to  claim 1 , wherein at least the inner tube of the cryostat, facing the screen of the cable, is corrugated transversely to its longitudinal direction.