Thermodynamic performance comparison of a mobile air conditioning system for various HFO and HC alternative refrigerants to replace R134a

Year 2025, Volume: 14 Issue: 1, 25 - 37, 25.03.2025

Eren Kabak , Murat Hoşöz

Abstract

The thermodynamic performance of a mobile air conditioning (MAC) system with R134a was compared with the performance offered by some Hydrofluoroolefin (HFO) and Hydrocarbon (HC) refrigerants, namely R1234yf, R1234ze(e), R152a, R290 and R600a. Both the energy and exergy performance merits of the MAC system, including the COP, the rates of exergy destroyed in the components and the exergetic efficiency, were taken into account. In this comparison, the cooling load of the evaporator was varied between 3 kW and 7 kW, both the superheat and subcooling at the outlets of the heat exchangers were assumed to be 5 °C. The refrigerant properties were determined using the REFPROP 9.1 software for a typical evaporating temperature of −2 °C, condenser temperatures of 40 and 50 °C and compressor isentropic efficiency of 55%. Then, the proposed performance parameters of the MAC system were calculated. R1234yf, R1234ze(e) and R290 yielded on average 4.41%, 0.20% and 1.69% lower COP, respectively, whereas R600a and R152a resulted in on average 2.45% and 3.39% higher COP, respectively, relative to R134a. In agreement with the COP findings, R1234yf, R1234ze(e) and R290 provided on average 4.34%, 0.22% and 1.64% lower exergetic efficiency, while R600a and R152a yielded on average 2.38% and 3.35% higher exergetic efficiency, respectively than R134a.

Keywords

Air conditioning, Mobile, R1234yf, R1234ze(e), R134a, R152a, R290, R600a

References

• Bhatti, M.S., “Riding in Comfort Part II: Evolution of Automotive Air Conditioning”, ASHRAE Journal, 41, 44-50, 1999.
• UNEP, “Montreal Protocol on substances that deplete the ozone layer, final act”, United Nations Environment Programme, 1987.
• Lee, Y. and Jung, D., “A brief performance comparison of R1234yf and R134a in a bench tester for automobile applications”, Applied Thermal Engineering, 35, 240-242, 2012.
• UNEP, “Kyoto Protocol to the United Nations Framework Convention on Climate Change”, United Nations Environment Programme, 1997.
• EU, “Regulation (EU) No 517/2014 of the European Parliament and of the Council of 16 April 2014 on fluorinated greenhouse gases and repealing Regulation (EC) No 842/2006”, Official Journal of European Union, L 150/195, 2014.
• Zhang, Z., Wang, J., Feng, X., Chang, L., Chen, Y. and Wang, X., “The solutions to electric vehicle air conditioning systems: A review”, Renewable and Sustainable Energy Reviews, 91, 443-463, 2018.
• Devecioğlu, A.G. and Oruç, V., “A comparative energetic analysis for some low-GWP refrigerants as R134a replacements in various vapor compression refrigeration systems”, Journal of Thermal Sciences and Technology, 38, 51-61, 2018.
• Zilio, C., Brown, J.S., Schiochet, G. and Cavallini, A., “The refrigerant R1234yf in air conditioning systems”, Energy, 36, 6110-6120, 2011.
• Alkan, A., Kolip, A. and Hosoz, M., “Energetic and exergetic performance comparison of an experimental automotive air conditioning system using refrigerants R1234yf and R134a”, Journal of Thermal Engineering, 7, 1163-1173, 2021.
• Tasdemirci, E., Alptekin, E. and Hosoz, M., “Experimental performance comparison of R1234yf and R134a automobile air conditioning systems employing a variable capacity compressor”, International Journal of Vehicle Design, 90, 1-18, 2022.
• Prabakaran, R., Lal, D.M. and Kim S.C., “Thermodynamic analysis of air conditioning system for a passenger vehicle with suction line heat exchanger using HFO-1234yf”, Heat Transfer Engineering, 814-832, 2023.
• Cho, H., Lee, H. and Park, C., “Performance characteristics of an automobile air conditioning system with internal heat exchanger using refrigerant R1234yf”, Applied Thermal Engineering, 61, 563-569, 2013.
• Direk, M., Kelesoglu, A. and Akin, A., “Drop-in performance analysis and effect of IHX for an automotive air conditioning system with R1234yf as a replacement of R134a”, Strojniski Vestnik – Journal of Mechanical Engineering, 63, 314-319, 2017.
• Wantha, C., “Analysis of heat transfer characteristics of tube-in-tube internal heat exchangers for HFO-1234yf and HFC-134a refrigeration systems”, Applied Thermal Engineering, 157, 1-10, 2019.
• Prabakaran, R., Sidney, S., Iyyappan, R. and Lal, D.M., “Experimental studies on the performance of mobile air conditioning system using environmental friendly HFO-1234yf as a refrigerant”, Proceedings of the Institution of Mechanical Engineers Part E-Journal of Process and Engineering, 235, 735-742, 2019.
• Gungor, U. and Hosoz, M., “Performance comparison of a mobile air conditioning system using an orifice tube as an expansion device for R1234yf and R134a”, Science and Technology for the Built Environment, 30, 588-598, 2024.
• Gungor, U. and Hosoz, M., “Experimental performance evaluation of an R1234yf automobile air conditioning system employing an internal heat exchanger”, International Journal of Automotive Engineering and Technology, 10 (1), 50-59, 2021.
• Alkan, A. and İnan, M.S., “Experimental investigation of the effects of compressor types on the performance of an automobile air conditioning system using R1234yf”, International Journal of Refrigeration, 155, 58-66, 2023.
• Aral, M.C., Suhermanto, M. and Hosoz, M., “Performance evaluation of an automotive air conditioning and heat pump system using R1234yf and R134a”, Science and Technology for the Built Environment, 27, 44-60, 2021.
• Hosoz, M. and Karabektas, M., “Comparative performance of an automotive air conditioning system using R1234yf and R134a”, 13th International Conference on Sustainable Energy Technologies (SET 2014), Paper ID: SET2014-E40082, Geneva, Switzerland, August 25-28, 2014.
• Yataganbaba, A., Kilicarslan, A. and Kurtbas, I., “Exergy analysis of R1234yf and R1234ze as R134a replacements in a two evaporator vapour compression refrigeration system”, International Journal of Refrigeration 60, 26-37, 2015.
• Moran, M.J. and Shapiro, H.N., “Fundamentals of Engineering Thermodynamics”, West Sussex, England: John Wiley and Sons, 2006.
• Cho, H. and Park, C., “Experimental investigation of performance and exergy analysis of automotive air conditioning systems using refrigerant R1234yf at various compressor speeds”, Applied Thermal Engineering, 101, 30-37, 2016.
• Mota-Babiloni, A., Navarro-Esbri, J., Barragan-Cervera, A., Moles, F. and Peris, B., “Drop-in energy performance evaluation of R1234yf and R1234ze(e) in a vapour compression system as R134a replacements”, Applied Thermal Engineering, 71, 259-265, 2014.
• Hodnebrog, Ø., Etminan, M., Fuglestvedt, J.S., Marston, G., Myhre, G., Nielsen, J.C., Shine, K.P. and Wallington, T.J., “Global warming potentials and radiative efficiencies of halocarbons and related compounds: A comprehensive review”. Reviews of Geophysics 51, 300-378, 2013.
• Lemmon, E.W., Huber, M.L. and McLinden, M.O., “Reference Fluid Thermodynamic and Transport Properties (REFPROP), Version 9.1, in NIST Standard Reference Database 23, National Institute of Standards and Technology, Gaithersburg, 2013.