earticle

영어

The core of a High Temperature Superconducting (HTS) cable lies eccentrically inside the inner pipe of the cryostat in the absence of any supporting structures or spacers. This eccentricity may result in non-uniform cooling of the superconducting tapes. In this paper, three types of spacers with different geometries are designed with the aim to position the cable core centrally within the inner vessel of the cryostat. An optimum distance to be maintained between two such consecutive spacers is proposed. For an allowable radial deflection of 1.5 mm, the distance required to be maintained between two adjacent spacers was found to be 1.553 m. The spacers have been designed and studied structurally to operate at cryogenic temperatures. The pressure drop due to the presence of these spacers has been computed numerically and a comparison has been made between different types of spacers. It was found that amongst the three spacers designed, though spacer type B offers minimum pressure drop per unit length, spacer type C offers maximum surface area available for cooling the superconducting elements of the HTS power cable.