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

Author(s) : DEVOTTA S., PADALKAR A. S., SANE N. K.

Type of article: Article

Summary

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.

Details

  • Original title: Performance assessment of HCFC-22 window air conditioner retrofitted with R407C.
  • Record ID : 2006-0607
  • Languages: English
  • Source: Applied Thermal Engineering - vol. 25 - n. 17-18
  • Publication date: 2005/12

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