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Document IIF

Évaluation du R-438A comme frigorigène de conversion immédiate du R-22 dans un refroidisseur d'eau à détente directe.

Assessment of R-438A as a retrofit refrigerant for R-22 in direct expansion water chiller.

Auteurs : ELGENDY E., HASSANAIN M., FATOUH M.

Type d'article : Article, Article de la RIF

Résumé

The present work aims to evaluate the performance characteristics of a vapor compression refrigeration system using R-438A as a retrofit refrigerant for R-22. In order to achieve this objective, a test facility is developed and experiments are performed over a wide range of chilled water inlet temperature (11:20 °C), condenser water inlet temperature (25:35 °C) and condenser water mass flow rate (363:543 kg h-1). Results showed that as the chilled water inlet temperature changes from 11.5 to 20.5 °C, system COP increases from 1.78 to 2.07 at constant condenser water inlet temperature of 25.5 °C. Cooling capacity and COP of the system using R-438A are lower than R-22 by 11% and 12.5%, respectively. However, compressor discharge temperature using R-438A is slightly lower than R-22 which confirms that R-438A can be used as a retrofit refrigerant for R-22 to complete the remaining life time of the existing plants.

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Format PDF

Pages : 127-136

Disponible

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    20 €

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    Gratuit

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Détails

  • Titre original : Assessment of R-438A as a retrofit refrigerant for R-22 in direct expansion water chiller.
  • Identifiant de la fiche : 30013122
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 50
  • Date d'édition : 02/2015

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