Energy, exergy and entropy analysis with R1234yf as an alternate refrigerant to R134a of automobile air conditioning system

Abstract

A major portion of the worldwide emissions arise from mobile air-conditioning systems with hydrofluorocarbon refrigerant as working substance and which is one of major cause for the greenhouse effect. R134a refrigerant having GWP of 1400 has been extensively used in car air conditioning. To reduce greenhouse gas emissions, the current R134a refrigerant must be phase out as per Kigali Amendment. The present study deals with cooling load calculation of car model by heat balance method as per ASHRAE standard using local climate condition. Further, thermodynamic analysis of R1234yf as an alternate refrigerant to R134a has been carried out for automobile air conditioning system. The required properties of refrigerants are extracted from Engineering Equation Software. The thermodynamic analysis is carried out to study the effect of operating parameters viz. condensing temperature, evaporating tempera-ture, degree of superheating and degree of subcooling on COP, EDR, exergy efficiency and entropy generation. The previous literature reports mainly focus on separate study of either cooling load calculation or energy analysis or exergy analysis of R1234yf and R134a for au-tomobile air conditioning system, while this paper presents the comprehensive study of new low GWP R1234yf as an alternate refrigerant to R134a in automobile air conditioning system with cooling load calculation including the concept of energy, entropy and exergy analysis. The percentage difference in COP between R134a and R1234yf system varies from 2.44 % to 4.78 % while percentage difference in EDR varies from 6.79 % to 2.87 % when evaporating temperature varied from -10 °C to 10 °C. With 12 °C of superheating at compressor inlet, the COP of R134a is 3.9 whereas COP of R1234yf is 3.75, which makes 3.85 % lower than that of R134a. The R1234yf has 4.78 % lower value of exergy efficiency as compared to that of R134a at evaporating temperature of -10 °C and it is found that maximum exergy destruction takes place in compressor.

Keywords

• R1234yf
• R134a
• Automobile Air Conditioning
• COP
• Exergy

References

1. REFERENCES
2. [1] UNEP Technical Options Committee. 2018 Report of the Refrigeration, Air Conditioning and Heat Pumps Technical Options Committee. 2019. [Online]. Available: https://ozone.unep.org/sites/default/files/2019-04/RTOC-assessment-report-2018_0.pdf
3. [2] United Nations, Treaty Collection. Kigali Amendment. 2016;2:1–16.
4. [3] India Cooling Action Plan. Ozone Cell Ministry of Environment, Forest & Climate Change Government of India March. 2019.
5. [4] Yang CY, Nalbandian H. Condensation heat transfer and pressure drop of refrigerants HFO-1234yf and HFC-134a in small circular tube. Int J Heat Mass Transf 2018 Dec;127:218–227. [CrossRef]
6. [5] Hasheer SM, Srinivas K, Bala PK. Energy analysis of hfc-152a, hfo-1234yf and hfc/hfo mixtures as a direct substitute to hfc-134a in a domestic refrigerator. Stroj Cas 2021;71:107–120. [CrossRef]
7. [6] Reasor P, Aute V, Radermacher R. Refrigerant R1234yf Performance Comparison Investigation. Int Refrig Air Cond Conf Purdue 2010:1–7.
8. [7] Devotta S, Waghmare AV, Sawant NN, Domkundwar BM. Alternatives to HCFC-22 for air conditioners. Appl Therm Eng 2001;21:703–715. [CrossRef]

9. [8] Ghodbane M. An Investigation of R152a and Hydrocarbon Refrigerants in Mobile Air Conditioning on JSTOR. SAE Trans Sect J Passeng Cars. 1999;108:1658–1673. [CrossRef]
10. [9] Yadav P, et al. Review on the Energy and Exergy Analysis of Vapour Compression Refrigeration System Using Nanolubricant. Int J Low-Carbon Technol 2014;2:47–53.
11. [10] Golzari S, Kasaeian A, Daviran S, Mahian O, Wongwises S, Sahin AZ. Analyse selon le second principe d’un système de conditionnement d’air automobile fonctionnant au HFO-1234yf, frigorigène respectueux de l’environnement. Int J Refrig 2017;73:134–143. [CrossRef]
12. [11] Yataganbaba A, Kilicarslan A, Kurtbas I. Exergy analysis of R1234yf and R1234ze as R134a replacements in a two evaporator vapour compression refrigeration system. Int J Refrig 2015;60:26–37. [CrossRef]
13. [12] ASHRAE. Designation and Safety Classification of Refrigerants. 2019. [Online]. Available: www.ashrae.org
14. [13] Yashawantha KM, Vinod AV. Experimental Investigation on Thermal Conductivity and Stability of Water-Graphite Nanofluid. J Therm Eng 2021;7:1743–1751. [CrossRef]
15. [14] Alkan A, Kolip A, Hosoz M. Energetic and exergetic performance comparison of an experimental automotive air conditioning system using refrigerants R1234yf and R134a. J Therm Eng 2021;7:1163–1173. [CrossRef]
16. [15] Yumruta R. Exergy analysis of vapor compression refrigeration systems. Exergy, an Int J 2002;2:266–272. [CrossRef]
17. [16] Tarish JAD, Apostol V, HLP C, Ionita. Exergy and performance analyses of impact subcooling for vapor compression refrigeration system utilizing eco-friendly refrigerants. IOP Conf Ser Mater Sci Eng 2020;997. [CrossRef]
18. [17] Ozgur EO, Kabul A. Exergetic and exergoeconomic analysis of an aircraft jet engine (AJE). Int J Exergy 2008;5:567–581. [CrossRef]
19. [18] Cho H, Lee H, Park C. Performance characteristics of an automobile air conditioning system with internal heat exchanger using refrigerant R1234yf. Appl Therm Eng 2013;61:563–569. [CrossRef]
20. [19] Qi Z. Experimental study on evaporator performance in mobile air conditioning system using HFO-1234yf as working fluid. Appl Therm Eng 2013;53:124–130. [CrossRef]
21. [20] Daviran S, et al. A comparative study on the performance of HFO-1234yf and HFC-134a as an alternative in automotive air conditioning systems. Appl Therm Eng 2017;110:1091–1100. [CrossRef]
22. [21] Wantha C. Analysis of heat transfer characteristics of tube-in-tube internal heat exchangers for HFO-1234yf and HFC-134a refrigeration systems. Appl Therm Eng 2019;157:113747. [CrossRef]
23. [22] Gaurav, Kumar R. Sustainability of Alternative Material of R-134a in Mobile Air-conditioning System: A Review. Mater Today Proc 2017;4:112–118. [CrossRef]
24. [23] UNEP Technical Options Committee. 2018 Report of the Refrigeration, Air Conditioning and Heat Pumps Technical Options Committee. 2019. [Online]. Available: https://ozone.unep.org/sites/default/files/2019-04/RTOC-assessment-report-2018_0.pdf
25. [24] Devecioglu AG, Oruc V. Characteristics of Some New Generation Refrigerants with Low GWP. Energy Procedia 2015;75:1452–1457. [CrossRef]
26. [25] Lee Y, Kang DG, Jung D. Performance of virtually non-flammable azeotropic HFO1234yf/HFC134a mixture for HFC134a applications. Int J Refrig 2013;36:1203–1207. [CrossRef]
27. [26] Aral MC, Hosoz M, Suhermanto M. Empirical correlations for the performance of an automotive air conditioning system using R1234yf and R134a. Isi Bilim Ve Tek Dergisi/ J Therm Sci Technol 2017;37:127–137.
28. [27] Direk M, Mert MS, Yüksel F, Keleşoǧlu A. Exergetic investigation of a R1234yf automotive air conditioning system with internal heat exchanger. Int J Thermodyn 2018;21:103–109. [CrossRef]
29. [28] Alhendal Y, Gomaa A, Bedair G, Kalendar A. Thermal Performance Analysis of Low-GWP Refrigerants in Automotive Air-Conditioning System. Adv Mater Sci Eng. 2020. [CrossRef]
30. [29] Shin Y, Kim T, Lee A, Cho H. Performance characteristics of automobile air conditioning using the R134A/R1234yf mixture. Entropy 2020;22:4. [CrossRef]
31. [30] ASHRAE. ASHRAE Handbook of Fundamentals. 2017.
32. [31] Fayazbakhsh MA, Bahrami M. Comprehensive modeling of vehicle air conditioning loads using heat balance method. SAE Tech Pap. 2013;2. [CrossRef]
33. [32] ISO 8996. Ergonomics of the thermal environment — Determination of metabolic rate. International Standard International Standard - ISO 527-4.
34. [33] Sukhatme SP. Solar Energy- principles of thermal collection and storage. 2nd edition. Tata McGraw-Hill Education; 1996.
35. [34] Ingersoll JG, Kalman TG, Maxwell LM, Niemiec RJ. Automobile Passenger Compartment Thermal Comfort Model Part. SAE Eng Soc Adv Land, Sea, Air Sp. 1992;February 24-28. [CrossRef]
36. [35] Klein SA, Alvarado F. Engineering Equation Solver. F-Chart Software; 2005.
37. [36] Bejan A, Tsatsaronis G, Adrian M. Thermal Design and Optimization. Wiley; 1995.
38. [37] Dincer I, Ozturk M. Energy, environment, and sustainable development. 3rd edition. Elsevier publications; 2021. [CrossRef]
39. [38] Arora A, Arora BB, Pathak BD, Sachdev HL. Exergy analysis of a Vapour Compression Refrigeration system with R-22, R-407C and R-410A. Int J Exergy 2007;4:441–454. [CrossRef]
40. [39] Taskesen E, Tekir M, Gedik E, Arslan K. Numerical investigation of laminar forced convection and entropy generation of Fe3O4/water nanofluids in different cross-sectioned channel geometries. J Therm Eng 2021;7:1752–1767. [CrossRef]
41. [40] Rana S, Dura HB, Bhattrai S, Shrestha R. Impact of baffle on forced convection heat transfer of CuO/water nanofluid in a micro-scale backward facing step channel. J Therm Eng 2022;8:310–322. [CrossRef]