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Document IIF

Recherche sur un système frigorifique à fractionnement de frigorigène pour les instruments à basse température.

The research on mixed-refrigerant fractionation refrigeration system for low-temperature instruments.

Auteurs : SHI Y., HU C. X.

Résumé

Mixed-refrigerant fractionation refrigeration system is applied in low temperature instruments in order to let up the volume and reduce the weight of refrigeration system. In this paper, 2-stage condenser-evaporator, high and low temperature regenerators are put together to improve on a combined heat exchanger. For using fluid seal as pumps, U-bend tubes are designed at the liquid outlet of the condenser and every separator. On the basis of these, the condensing pressure, evaporation pressure, minimum evaporation temperature, maximum starting pressure of different ratio non-azeotropic mixed-refrigerant are discussed through experiments respectively. Then the experiments of temperature dropping between the former series-parallel connection and the improved system of single-stage compression, 2-stage fractionation refrigeration system are predicted in a low temperature cooling circulation instrument with 5 liters/-80°C. The results indicate the effect of R-134a/R-23 is better than the others for its minimum refrigerating temperature and the temperature dropping of the improved system is faster, so it can replace cascade refrigeration system.

Documents disponibles

Format PDF

Pages : ICR07-B2-99

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : The research on mixed-refrigerant fractionation refrigeration system for low-temperature instruments.
  • Identifiant de la fiche : 2008-0009
  • Langues : Anglais
  • Source : ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Date d'édition : 21/08/2007

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