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Performance assessment of HC-290 as a drop-in substitute to HCFC-22 in a window air conditioner.

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

Type of article: Article, IJR article

Summary

As per the Montreal Protocol, CFCs and HCFCs are being phased out. HCFC-22 is used in window air conditioners. This paper presents the experimental performance study of a window air conditioner with propane (HC-290), a natural refrigerant, as a drop-in substitute to HCFC-22. Experimental results showed that HC-290 had 6.6% lower cooling capacity for the lower operating conditions and 9.7% lower for the higher operating conditions with respect to HCFC-22. The coefficient of performance for HC-290 was 7.9% higher for the lower operating conditions and 2.8% higher for the higher operating conditions. The energy consumption of the unit with HC-290 was lower in the range 12.4-13.5% than HCFC-22. The discharge pressures for HC290 were lower in the range 13.7-18.2% than HCFC-22. For HC290, the pressure drop was lower than HCFC-22 in both heat exchangers. This paper also presents simulation results for the heat exchangers of an HCFC-22 window air conditioner with HC-290 as a drop-in substitute. The simulation has been carried out using EVAP-COND, a heat exchanger model developed by NIST [National Institute of Standards and Technology]. The simulated evaporator capacities are within plus or minus 4% of the experimentally measured cooling capacities for both refrigerants. Simulation results for HC290 and HCFC-22 are compared. The exit temperatures of HC-290 are lower by 0.3-1.2 °C in the condenser and are higher by 2.1-2.4°C in the evaporator than HCF-C22. Evapourating pressures of HC-290 are lower by 2.1-3.3% as compared to HCFC-22. The pressure drops of HC-290 are lower in both the evaporator and the condenser as compared to HCFC-22. The outlet temperatures of air for HCFC-22 and HC-290 in both heat exchangers are nearly the same.

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Pages: 594-604

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Details

  • Original title: Performance assessment of HC-290 as a drop-in substitute to HCFC-22 in a window air conditioner.
  • Record ID : 2005-1666
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 28 - n. 4
  • Publication date: 2005/06

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