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Experimental analysis of HFC-134a expansion through small-bore adiabatic capillary tubes.

Analyse expérimentale de la détente du HFC-134a à travers des tubes capillaires adiabatiques de faible diamètre.

Auteurs : DE LARA J. F. P., MELO C., BOENG J., HERMES C. J. L.

Type d'article : Article de la RIF

Résumé

This paper comes out with an experimental investigation of the expansion of refrigerant HFC-134a through adiabatic capillary tubes with internal diameters ranging from 0.23 mm to 0.53 mm aiming at the so-called mesocooling applications. To this end, an experimental apparatus was designed and constructed to emulate the operating conditions of mesoscale refrigerating devices, with condensing pressures ranging from 9 to 19 bar, and inlet refrigerant subcooling ranging from 5 to 10 K. The tube length was varied from 1 to 2 m. The tests were carried out following a factorial design. The experimental data were used to assess the mass flow rate prediction capabilities of an explicit, algebraic model for adiabatic capillary tubes devised in a prior work. The results revealed that the model is not suitable for small-bore capillary tubes. Correction factors were proposed, so that the model predictions for more than 90% of the experimental dataset fell within ±10% error bounds.

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Format PDF

Pages : 37-43

Disponible

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    15 €

  • Prix membre*

    8 €

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Détails

  • Titre original : Experimental analysis of HFC-134a expansion through small-bore adiabatic capillary tubes.
  • Identifiant de la fiche : 30027381
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 112
  • Date d'édition : 04/2020
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2019.12.015

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