The design, fabrication and testing of a cooling system using solid nitrogen for a resistive high-Tc superconducting fault current limiter

J. B. Song, K. L. Kim, K. J. Kim, J. H. Lee, H. M. Kim, W. S. Kim, S. W. Yim, H. R. Kim, O. B. Hyun, Haigun Lee

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

In general, conventional high-Tc superconducting fault current limiters (SFCLs) are operated by cooling systems with a liquid cryogen, such as liquid nitrogen (LN2). However, in the fault mode, LN2 evaporates because of joule heating in the SFCL module, so the SFCL system experiences an enormous increase in nitrogen gas volume. In this case, the thermal stability and protection of the system become the primary concerns for the design of the SFCL cooling system. In order to enhance the thermal stability and safety of the system, an SFCL cooled by solid nitrogen (SN2) as a large heat capacitor has been proposed as an alternative. In this paper we report the quench/recovery characteristics of a YBCO-coated conductor (CC) evaluated in an SN2 cooling system for the SFCL. A feasibility study is also conducted on the reference design codes and thermal requirements for the optimal design of the SN2 cooling system. The results demonstrate that the improved thermal contact obtained between the SN2 cooling system and the SFCL module renders the proposed system a suitable cryogen for the SFCL module. Detailed experimental results for the LN2 and SN2 cooling systems are presented and discussed.

Original languageEnglish
Article number115023
JournalSuperconductor Science and Technology
Volume21
Issue number11
DOIs
Publication statusPublished - 2008 Nov 1

Fingerprint

Superconducting fault current limiters
solid nitrogen
cooling systems
Cooling systems
Nitrogen
Fabrication
fabrication
Testing
modules
Thermodynamic stability
thermal stability
thermal protection
Joule heating
Liquid nitrogen
liquid nitrogen
electric contacts
safety
capacitors
Capacitors
conductors

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Ceramics and Composites
  • Materials Chemistry
  • Metals and Alloys

Cite this

The design, fabrication and testing of a cooling system using solid nitrogen for a resistive high-Tc superconducting fault current limiter. / Song, J. B.; Kim, K. L.; Kim, K. J.; Lee, J. H.; Kim, H. M.; Kim, W. S.; Yim, S. W.; Kim, H. R.; Hyun, O. B.; Lee, Haigun.

In: Superconductor Science and Technology, Vol. 21, No. 11, 115023, 01.11.2008.

Research output: Contribution to journalArticle

Song, J. B. ; Kim, K. L. ; Kim, K. J. ; Lee, J. H. ; Kim, H. M. ; Kim, W. S. ; Yim, S. W. ; Kim, H. R. ; Hyun, O. B. ; Lee, Haigun. / The design, fabrication and testing of a cooling system using solid nitrogen for a resistive high-Tc superconducting fault current limiter. In: Superconductor Science and Technology. 2008 ; Vol. 21, No. 11.
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