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Performance du R-438A dans les systèmes frigorifiques et de condtionnement d'air au R-22.

Performance of R-438A in R-22 refrigeration and air conditioning systems.

Numéro : pap. n. R18, 2325

Auteurs : ALLGOOD C. C., LAWSON C. C.

Résumé

With the accelerated phase out of R-22 underway, equipment owners and service contractors must develop a plan for operating, retrofitting, or replacing their existing R-22 refrigeration and air conditioning systems. In many cases, retrofitting the existing R-22 equipment to an alternative refrigerant is a viable, cost effective option for the equipment owner. R-438A is a non-ozone-depleting hydrofluorocarbon (HFC) refrigerant blend which can be used to retrofit existing hydrochlorofluorocarbon (HCFC) refrigerant R-22 refrigeration and air conditioning systems with direct expansion evaporators and positive displacement compressors. In most systems, the existing mineral oil (MO) or alkylbenzene (AB) lubricant can be used, reducing the cost and time required for the retrofit by eliminating the need to change to a polyolester (POE) lubricant. This paper will review the performance characteristics and oil return properties of R-438A from both laboratory tests and actual R-22 system retrofits. Topics to be covered in this presentation include refrigerant physical and environmental properties, material compatibility information, oil return properties, and capacity, energy efficiency, and operating data from both compressor calorimeter tests and actual R-22 refrigeration and air conditioning system retrofits.

Documents disponibles

Format PDF

Pages : 8 p.

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

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

Détails

  • Titre original : Performance of R-438A in R-22 refrigeration and air conditioning systems.
  • Identifiant de la fiche : 30000784
  • Langues : Anglais
  • Sujet : Alternatives aux HFC
  • Source : 2010 Purdue Conferences. 13th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 12/07/2010

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