DEVICE FOR TRANSPORTING CURRENT THROUGH A SUPERCONDUCTING POWER CABLE

摘要

A device (1) for transporting current through a superconducting power cable (2), wherein the device comprises an inner tube (3) and an outer tube (4) which are arranged concentrically relative to each other, wherein the power cable is disposed within the inner tube, which inner tube also houses a cryogenic cooling medium (5) for cooling the power cable, wherein a space (6) having an annular cross - section is present between the inner tube and the outer tube, and wherein the outer tube is thermally isolated from the inner tube, characterised in that a vapour return line is disposed within the inner tube, wherein an outer wall of the vapour return line (7) is provided with several spaced holes, and wherein an under pressure relative to the cryogenic medium prevails in the vapour return line for causing a portion of the cryogenic cooling medium that has been forced through the holes in the vapour return line to evaporate.