Partager

Conception intégrée d'un réfrigérateur cryogénique et d'une boucle de circulation d’azote liquide pour un câble supraconducteur à haute température.

Integrated design of cryogenic refrigerator and liquid-nitrogen circulation loop for HTS cable.

Auteurs : CHANG H., RYU K. N., YANG H. S.

Type d'article : Article

Résumé

A new concept of cryogenic cooling system is proposed and investigated for application to long-length HTS cables. One of major obstacles to the cable length of 1 km or longer is the difficulty in circulating liquid nitrogen (LN) along the cables, since the temperature rise and pressure drop of LN flow could be excessively large. This study attempts a breakthrough by integrating the refrigerator with the LN circulation loop in order to eliminate the cryogenic LN pumps, and generate a large LN flow with the power of
compressors at ambient temperature. A variety of thermodynamic structures are investigated on standard and modified Claude cycles, where nitrogen is used as refrigerant and the LN circulation loop is included as part of the closed cycle. Four proposed cycles are fully analyzed and optimized with a process simulator (Aspen HYSYS) to evaluate the FOM (figure of merit) and examine the feasibility. The modified dual-pressure cycle cooled with expander stream is recommended for long HTS cables.

Détails

  • Titre original : Integrated design of cryogenic refrigerator and liquid-nitrogen circulation loop for HTS cable.
  • Identifiant de la fiche : 30020959
  • Langues : Anglais
  • Source : Cryogenics - vol. 80
  • Date d'édition : 06/2016
  • DOI : http://dx.doi.org/10.1016/j.cryogenics.2016.06.006

Liens


Voir d'autres articles du même numéro (31)
Voir la source

Indexation