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Progrès sur un cryorefroidisseur à tube à pulsation de type Vuilleumier sans cryogène.

Advances on a cryogen-free Vuilleumier type pulse tube cryocooler.

Auteurs : WANG Y., ZHAO Y., ZHANG Y., et al.

Type d'article : Article

Résumé

This paper presents experimental results and numerical evaluation of a Vuilleumier (VM) type pulse tube cryocooler. The cryocooler consists of three main subsystems: a thermal compressor, a low temperature pulse tube cryocooler, and a Stirling type precooler. The thermal compressor, similar to that in a Vuilleumier cryocooler, is used to drive the low temperature stage pulse tube cryocooler. The Stirling type precooler is used to establish a temperature difference for the thermal compressor to generate pressure wave. A lowest no-load temperature of 15.1 K is obtained with a pressure ratio of 1.18, a working frequency of 3 Hz and an average pressure of 2.45 MPa. Numerical simulations have been performed to help the understanding of the system performance. With given experimental conditions, the simulation predicts a lowest temperature in reasonable agreement with the experimental result. Analyses show that there is a large discrepancy in the pre-cooling power between experiments and calculation, which requires further investigation.

Détails

  • Titre original : Advances on a cryogen-free Vuilleumier type pulse tube cryocooler.
  • Identifiant de la fiche : 30021249
  • Langues : Anglais
  • Source : Cryogenics - vol. 82
  • Date d'édition : 01/2017
  • DOI : http://dx.doi.org/10.1016/j.cryogenics.2017.01.007

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