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Document IIF

Etude sur les modèles de démarrage des systèmes frigorifiques fonctionnant à basse température avec des mélanges de frigorigènes.

Investigation of the starting modes of the low-temperature refrigerating machines working on the mixtures of refrigerants.

Auteurs : ROZHENTSEV A., NAER V.

Type d'article : Article, Article de la RIF

Résumé

The starting mode of a small low-temperature Joule-Thomson refrigerating machine is in focus of the experimental investigation reported here. The refrigerating machine operates by the Linde cycle. A mixture of hydrocarbons-isobutane/ethane/methane - is used as a refrigerant. The object of cooling is a small testing chamber to be cooled down and thermostabilized at the temperature level of -70 to-80°C. The starting modes were studied under heavy-duty heat load on the system resulting from the initial thermal equilibrium between the whole system and ambience. The experimental data demonstrate a crucial effect of the low-boiling mixture components condensation in the refrigerant high-pressure flow on the machine starting performance. Excessive values of the discharge pressure, compression ratio and compressor input power have been observed during the start-up process which may last for tens of minutes affecting the refrigerating machine reliability. Some probable causes of the phenomena and countermeasures are pointed out.

Documents disponibles

Format PDF

Pages : 901-910

Disponible

  • Prix public

    20 €

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    Gratuit

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Détails

  • Titre original : Investigation of the starting modes of the low-temperature refrigerating machines working on the mixtures of refrigerants.
  • Identifiant de la fiche : 2009-1419
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 32 - n. 5
  • Date d'édition : 08/2009

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