Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Design and structural analysis of spacers and their effect on hydraulic characteristics of liquid nitrogen cooled HTS cables

  • de Souza Isaac (Cryogenic Engineering Centre, Indian Institute of Technology) ;
  • Jadkar Ninad (Cryogenic Engineering Centre, Indian Institute of Technology) ;
  • Venkatesh Saravanan (Department of Mechanical Engineering, Indian Institute of Technology) ;
  • Gour Abhay Singh (Cryogenic Engineering Centre, Indian Institute of Technology)
  • Received : 2024.05.05
  • Accepted : 2024.06.26
  • Published : 2024.09.30
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Abstract

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.

Keywords

Acknowledgement

This work is a part of the 5 meter long Superconducting Cable Project undertaken by Indian Institute of Technology Kharagpur and funded by Central Power Research Institute (CPRI), Bengaluru, Karnataka, India.

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