The volumetric and thermodynamic properties of fluorinated ethers such as trifluoromethyl-1-H-pentafluoroethylether, F-oxetane, 2-H-heptafluoropropane, pentafluorodimethylether, F-methyl methyl ether, perfluorodoxolane, pentafluorodimethoxymethane and HFCs such as trifluoroethane, heptafluoropropane, difluoroethane, pentafluoropropane, ethyl fluoride as alternatives to replace R134a have been predicted using SRK equation of state over the temperature range from − 25 °C to + 55 °C. Theoretical analysis is carried out using ten-point vapour compression cycle for screening of candidate refrigerants. The results of analysis have been used to ascertain standard refrigeration parameters in respect of each of the candidate refrigerants. The analysis indicates that the performances of difluoroethane, ethyl fluoride, pentafluorodimethylether and F-oxetane are better than that of R134a.
Hydrofluorocarbons Fluorinated ethers Volumetric refrigeration capacity Discharge temperature Coefficient of performance Specific compressor work R134a
List of symbols
Clearance factor and specific heat (kJ/kg °C)
Coefficient of performance
Global warming potential
Ozone depletion potential
Molecular weight (kg/kg mol)
Mass flow rate, kg/s
Refrigerating effect (kJ/kg)
Temperature (K) and torque (N m)
Volume, cc (m3)
Specific volume (m3/kg)
Power input (W)
Normal boiling point (°C)
Vapour pressure (bar)
Volumetric refrigerating capacity (kJ/m3)
Specific compressor displacement [(m3)/ton of refrigeration]
Specific heat ratio
0, 1, 2, etc.
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S. Parashurama, V. Samaje, D.V. Sabannavar, in Proceedings of First International Conference on Frontier Technologies-Need for the Industry, Business and Education, Adhiyaman College of Engineering, Hosur, India (2006), pp. 245–248Google Scholar