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Conception optimale d'un canal de refroidissement pour un transformateur supraconducteur à haute température de type double serpentin plat.

The optimal design of cooling channel for a HTS transformer of double pancake coil type.

Auteurs : BAEK S. M., JOUNG J. M., KIM Y. S., et al.

Résumé

In the electrical insulation design of a pancake coil type high temperature superconducting (HTS) transformer, knowledge of the dielectric behaviour of both liquid nitrogen (LN2) and gaseous nitrogen (GN2) is very important. Also, the breakdown strength under quench conditions is an important factor in insulation engineering. Since spacers are used in the pancake coil type HTS transformer, the liquid nitrogen and the spacer must be considered together in the design of the insulation and cooling of this type transformer. When bubbles occur, the surface discharge characteristics of LN2 in a simulated cooling channel are examined to understand the optimal dimensions of the cooling channel. Open and closed cooling channels were made to compare the surface flashover voltage to each other. The surface flashover voltage for the open cooling channel appeared higher than that for the closed cooling channel. The open cooling channel type is recommended for higher stability of equipment. The research will be useful in the electrical design of pancake coil type HTS transformers that are cooled by LN2.

Détails

  • Titre original : The optimal design of cooling channel for a HTS transformer of double pancake coil type.
  • Identifiant de la fiche : 2006-2177
  • Langues : Anglais
  • Source : Cryogenics and refrigeration. Proceedings of ICCR 2003.
  • Date d'édition : 22/04/2003

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