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Computational fluid dynamics modeling and experimental verification of a Stirling-type pulse tube cryocooler with a cooling capacity of 700 W at 77 K.

Modélisation par la mécanique numérique des fluides et vérification expérimentale d’un cryorefroidisseur à tube à pulsation de type Stirling de 700 W d’une puissance frigorifique de 77 K.

Numéro : pap. n. 975

Auteurs : LI J., TAN J., ZHAI R., et al.

Résumé

This paper presents the computational fluid dynamics (CFD) modeling and optimization of a SPTC with a cooling capacity of 700 W at 77 K for cooling large-scale high-Tc superconducting facilities. This SPTC consists of two cold fingers driven by an 18 kW linear compressor. A two-dimensional CFD model is established to investigate the flow and heat transfer process inside the regenerator. For the aimed high cooling capacity, the flow straighteners become crucial to minimize the turbulence flows in the system. The distribution of temperature in the regenerator is non-uniform due to the flow conditions, which makes the optimization more difficult. The SPTC is worked out based on the theoretical analyses. The cooling capacity of 700 W at 77 K with a relative Carnot efficiency of 11.3% has been achieved experimentally, slightly lower than the simulated 13%.

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Pages : 8

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Détails

  • Titre original : Computational fluid dynamics modeling and experimental verification of a Stirling-type pulse tube cryocooler with a cooling capacity of 700 W at 77 K.
  • Identifiant de la fiche : 30025918
  • Langues : Anglais
  • Source : Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Date d'édition : 24/08/2019
  • DOI : http://dx.doi.org/10.18462/iir.icr.2019.0975

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