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Evaluation de la performance d'un conditionneur d'air de type fenêtre au HCFC-22 adapté afin de fonctionner au R407C.

Performance assessment of HCFC-22 window air conditioner retrofitted with R407C.

Auteurs : DEVOTTA S., PADALKAR A. S., SANE N. K.

Type d'article : Article

Résumé

This paper presents the experimental performance analysis of a 1.5 TR window air conditioner, retrofitted with R407C, as a substitute to HCFC-22. Experimental results showed that R407C, for the operating conditions covered in this study, had lower cooling capacity in the range 2.1-7.9% with respect to HCFC-22. The coefficient of performance for R407C was lower in the range 7.9-13.5%. The power consumption of the unit with R407C was higher in the range 6-7% than HCFC-22. The discharge pressures for R407C were higher in the range 11-13% than HCFC-22. This paper also presents simulation results of heat exchangers of an HCFC-22 window air conditioner retrofitted with R407C. The simulation has been carried out using EVAP-COND, a heat exchanger model developed by National Institute of Standards and Technology, USA. The simulated evaporator capacities are within plus or minus 3% of the experimentally measured cooling capacities for both refrigerants. Simulation results for R407C and HCFC-22 are compared. The exit temperatures of R407C are lower by 1.9 to 5.2 °C in the condenser and are higher by 3.2 to 3.8 °C in the evaporator than HCFC-22. Evaporating pressures of R407C are higher by 4.5-5.3% as compared to HCFC-22. The pressure drops of R407C are lower in both the evaporator and the condenser as compared to HCFC-22. The outlet temperatures of air for HCFC-22 and R407C in both heat exchangers are nearly the same.

Détails

  • Titre original : Performance assessment of HCFC-22 window air conditioner retrofitted with R407C.
  • Identifiant de la fiche : 2006-0607
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 25 - n. 17-18
  • Date d'édition : 12/2005

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