Experimental performance evaluation of an R1234yf automobile air conditioning system employing an internal heat exchanger

Year 2021, , 50 - 59, 31.03.2021

Umut Güngör , Murat Hoşöz

https://doi.org/10.18245/ijaet.842426

Cited By: 2

Abstract

A bench-top automobile air conditioning (AAC) system using a thermostatic expansion valve was developed. The system was equipped with a coaxial internal heat exchanger (HEX) and charged with R1234yf, a new refrigerant used as an alternative to R134a. The system was tested at the compressor speeds ranging between 1000 rpm and 2600 rpm with increments of 400 rpm. For each compressor speed, the air temperatures at the evaporator and condenser inlets were concurrently changed between 30 °C and 40 °C with increments of 5 °C. The system was operated for the cases of employing and not employing the HEX, and totally 30 test runs were performed. Then, the first law of thermodynamics was applied to the system components to evaluate various steady state performance parameters. The considered parameters were the refrigerant mass flow rate, evaporating temperature, cooling capacity, compressor power, coefficient of performance (COP), condenser heat dissipation rate and discharge temperature of the compressor. It was determined that the experimental system employing the HEX yielded on average 0.8 °C lower evaporating temperature, 2.2% higher cooling capacity, 2.0% lower compressor power and 3.0% higher COP values relative to the system not employing the HEX. These findings reveal that the use of HEX causes a better system performance in terms of the cooling capacity, compressor power and COP. Consequently, the performance of R1234yf AAC systems can be improved with the use of HEX, and thus, the AAC systems using R1234yf can be more competitive with those using R134a.

Keywords

Automobile, Air conditioning, R1234yf, Heat exchanger

References

• 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.
• 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.
• Zilio, C., Brown, S.J., Schiochet, G. and Cavallini, A., “The refrigerant R1234yf in air conditioning systems”, Energy, 36(10), 6110–6120, 2011.
• Zhao, Y., Qi, Z., Chen, J., Xu, B. and He, B., “Experimental analysis of the low-GWP refrigerant R1234yf as a drop-in replacement for R134a in a typical mobile air conditioning system”, Journal of Mechanical Engineering Science, 226, 2713–2725, 2012.
• 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 vapor compression system as R134a replacements”, Applied Thermal Engineering, 71, 259–265, 2014.
• Meng, Z., Zhang, H., Lei, M., Qin, Y. and Qiu, J., “Performance of low GWP R1234yf/R134a mixture as a replacement for R134a in automotive air conditioning systems”, International Journal of Heat and Mass Transfer, 116, 362–370, 2018.
• Li, Z., Liang, K. and Jiang, H., “Experimental study of R1234yf as a drop-in replacement for R134a in an oil-free refrigeration system”, Applied Thermal Engineering, 153, 646–654, 2019.
• 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.
• 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(2), 563–569, 2013.
• Navarro-Esbri, J., Moles, F. and Barragan-Cervera, A., “Experimental analysis of the internal heat exchanger influence on a vapour compression system performance working with R1234yf as a drop-in replacement for R134a, Applied Thermal Engineering”, 59(1-2), 153–161, 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”, Journal of Mechanical Engineering, 63(5), 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.
• Direk, M. and Kelesoglu, A., “Automotive air conditioning system with an internal heat exchanger using R1234yf and different evaporation and condensation temperatures”, Thermal Science, 23(2B), 1115–1125, 2019.
• Direk, M., Mert, M.S., Yüksel, F. and Keleşoğlu, A., “Exergetic investigation of R1234yf automotive air conditioning system with internal heat exchanger”, International Journal of Thermodynamics, 21(2), 103–108, 2018.
• Oruç, V. and Devecioğlu, A.G., “Experimental assessment of the retrofit of an internal heat exchanger in refrigeration systems: The effect on energy performance and system operation”, Applied Thermal Engineering, 180, 115843, 2020.
• Prabakaran, R., Lal, D.M. and Devotta, S., “Effect of thermostatic expansion valve tuning on the performance enhancement and environmental impact of a mobile air conditioning system”, Journal of Thermal Analysis and Calorimetry, 143, 335–350, 2021.
• 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.
• Vaghela, J.K., “Comparative evaluation of an automobile air-conditioning system using R134a and its alternative refrigerants”, Energy Procedia, 109, 153–160, 2017.
• Gaurav and Kumar, R., “Computational energy and exergy analysis of R134a, R1234yf, R1234ze and their mixtures in vapour compression system”, Ain Shams Engineering Journal, 9(4), 3229–3237, 2018.
• Qi, Z., “Performance improvement potentials of R1234yf mobile air conditioning system”, International Journal of Refrigeration, 58, 35–40, 2015.
• Daviran, S., Kasaeian, A., Golzari, S., Mahian, O., Nasirivatan, S. and Wongwises, S., “A comparative study on the performance of HFO-1234yf and HFC-134a as an alternative in automotive air conditioning systems”, Applied Thermal Engineering, 110, 1091–1100, 2013.
• Belman-Flores, J.M. and Ledesma, S., “Statistical analysis of the energy performance of a refrigeration system working with R1234yf using artificial neural networks”, Applied Thermal Engineering, 82, 8–17, 2015.
• Hosoz, M., Kaplan, K., Aral, M.C., Suhermanto, M. and Ertunc, H.M., “Support vector regression modeling of the performance of an R1234yf automotive air conditioning system”, Energy Procedia, 153, 309–314, 2018.
• Mendoza-Miranda, J.M., Salazar-Hernandez, C., Carrera-Cerritos, R., Ramirez-Minguela, J.J., Salazar-Hernandez, M., Navarro-Esbri, J. and Mota-Babiloni, A., “Variable speed liquid chiller drop-in modelling for predictive energy performance of R1234yf as low-GWP refrigerant”, International Journal of Refrigeration, 93, 144–158, 2018.
• Direk, M., Keleşoğlu, A. and Akin, A., “Theoretical performance analysis of an R1234yf refrigeration cycle based on the effectiveness of internal heat exchanger”, Hittite Journal of Science and Engineering, 4(1), 23–30, 2017.
• Direk, M. and Yuksel, F., “Experimental evaluation of an automotive heat pump system with R1234yf as an alternative to R134a”, Arabian Journal for Science and Engineering, 45, 719–728, 2020.
• Alkan, A., Kolip, A. and Hosoz, M., “Experimental energy and exergy performance of an automotive heat pump using R1234yf”, Journal of Thermal Analysis and Calorimetry, in press, 2020.
• Tasdemirci, E., Alptekin, E. and Hosoz, M., “Comparative performance of an automobile heat pump system with an internal heat exchanger using R1234yf and R134a”, International Journal of Exergy, 33(1), 98–112, 2020.
• 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”, Gaithersburg, National Institute of Standards and Technology, 2013.
• Moffat, R.J., “Describing the uncertainties in the experimental results”, Experimental Thermal and Fluid Science, 1, 3–17, 1988.
• Klein, S.A., “EES – Engineering Equation Solver, Version 10.167”, F-Chart Software, http://fchartsoftware.com, 2016.