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Analyses théoriques et vérification expérimentale d’un cryorefroidisseur à quatre étages à tube à pulsation de type Stirling pouvant atteindre 3 K.

Theoretical analyses and experimental verifications of a four-stage Stirling-type pulse tube cryocooler reaching 3 K.

Numéro : pap. n. 998

Auteurs : ZHA R., ZHANG T., TAN J., et al.

Résumé

This paper conducts theoretical analyses and experimental verifications of a four-stage Stirling-type pulse tube cryocooler (SPTC) aimed to reach 3 K for low-Tc superconducting devices and deep space explorations. A computational fluid dynamics (CFD) model is built for the SPTC, in which the irreversible losses in the regenerator are studied and cooling performances simulated. The entropy generations caused by three types of losses including pressure drop, axial heat conduction and ineffective heat transfer are calculated quantitatively and the distributions of them are presented. The four-stage SPTC is then worked out and tested. The experimental results indicate that, by using He-4 and He-3, it reaches no-load temperatures of 4.2 K and 3.5 K, respectively. The SPTC is expected to reach 3 K by matching with a larger capacity compressor.

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Pages : 7

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Détails

  • Titre original : Theoretical analyses and experimental verifications of a four-stage Stirling-type pulse tube cryocooler reaching 3 K.
  • Identifiant de la fiche : 30025919
  • 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.2019.0998

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