Numerical energy and exergy analysis of cooling systems: low GWP alternative refrigerants (R450A and R1234ze) to R134a

Öz

The use of new generation refrigerants in heating and cooling systems operating according to vapor compression cycles and the preference of renewable energy sources is very important to reduce the negative effects on the environment. Here, the energy and exergy performance of refrigerant R450A and R1234ze, which are alternatives to R134a, were theoretically examined. Energy and exergy analysis of cooling system were performed under the same working conditions (source temperature is between -15 and 15 oC, and heat sink temperature is constant 30 oC). The COP values of R134a, R1234ze, and R450A were 2.00, 1.98 and 1.97, respectively, while the heat source temperature was -15 oC. The heat source temperature was 15 oC, the COP values of R134a, R1234ze, and R450A were 4.82, 4.83 and 4.79, respectively. Under the given operating conditions, the highest total exergy destruction occurred at R134a, while the lowest total Exergy destruction occurred at R1234ze. The refrigerant with the highest and lowest cooling capacity was R134a and R1234ze. According to the results obtained from the analysis, it was concluded that R450A and R1234ze can be used instead of R134a.

Anahtar Kelimeler

• Global warming
• New generation refrigerants
• R134a/R1234ze mixture
• Energy and exergy

Kaynakça

1. López-Belchí, A. 2019. Assessment of a mini-channel condenser at high ambient temperatures based on experimental measurements working with R134a, R513A and R1234yf. Applied Thermal Engineering, 155, 341-353.
2. Kumaş, K. and Akyüz, A. 2020. Performance Analysis of R450A Refrigerant in Vapor Compression Cooling System for Sustainable Environment. Akademia Journal of Nature and Human Sciences, 6(1),57-71.
3. Gomrı, R., Karoune, N. and Khellaf, N. 2018. Energy and Exergy Analyses of Different Transcritical CO2 Refrigeration Cycles. El-Cezerî Journal of Science and Engineering, 5(2),547-555.
4. Demir, O. and Bilen, K. 2021. Energy and Exergy Analysis of Air, Water and Ground Source Heat Pumps for Different Refrigerants. El-Cezerî Journal of Science and Engineering, 8(2), 688-705.
5. Özden, E., Parlamış, H. and Büker, M. 2020. Numerical Study on Cooling Performance of a Counter-flow Indirect Evaporative Cooler. El-Cezerî Journal of Science and Engineering,7(3),1074-1087.
6. Demirci, E., Özkaymak, M., Koşan, M., Akkoç A. E. and Aktaş, M. 2020. Developments in Natural Refrigerant Usage. Gazi Journal of Engineering Sciences, 6(3),184-199.
7. Güngör, U. and Hoşöz, M. 2020. Experimental Analysis of the Effect of Expansion Device Type on the Performance of an R134a Automobile Air Conditioning System. Kocaeli University Journal of Science, 3(2), 214-222.
8. Yıldırım, R. and Yıldız, A. 2020. Energy, environmental and enviroeconomic analysis of the use R134a/R1234yf (10/90) as replace to R134a in a vapor compression cooling system. International Journal of Energy Applications and Technologies, 7(4), 101-106.

9. Mota-Babiloni, A., Navarro-Esbrí, J., Barragán, Á., Molés, F. and Peris, B. 2014. Drop-in energy performance evaluation of R1234yf and R1234ze in a vapor compression system as R134a replacements. Applied Thermal Engineering, 71(1), 259-265.
10. Feng, B., Yang, Z. and Zhai, R. 2018. Experimental study on the influence of the flame retardants on the flammability of R1234yf. Energy, 143, 212-218.
11. Yıldız, A. and Yıldırım, R. 2020. Energy and Environmental Analysis of Vapor Compression Refrigeration Systems Using an Alternative Refrigerant (R513A) to R134a. Duzce University Journal of Science and Technology, 8(3),1817-1828.
12. Şencan Şahin, A., Kovacı, T. and Dikmen, E. 2021. A GEP-Based Model Approach for Estimating Thermodynamic Properties of R513A Refrigerant. El-Cezerî Journal of Science and Engineering, 8(1), 376-388.
13. Makhnatch, P., Mota-Babiloni, A. and Khodabandeh R. 2017. Experimental study of R450A drop-in performance in an R134a small capacity refrigeration unit. International Journal of Refrigeration, 84,26-35.
14. Nagata, R., Kondou, C. and Koyama, S. 2017. Enhancement of R1234ze(Z) pool boiling heat transfer on horizontal titanium tubes for high-temperature heat pumps. Science and Technology for the Built Environment, 23(6),923-932.
15. Vaghela J. K. 2017. Comparative evaluation of an automobile air-conditioning system using R134a and its alternative refrigerants. Energy Procedia, 109,153-160.
16. Diani, A., Campanale, M., Cavallini, A. and Rossetto, L. 2018. Low GWP refrigerants condensation inside a 2.4 mm ID microfin tube. International Journal of Refrigeration, 86,312-321.
17. Bolaji, B., Adeleke, A., Adu, M. and Olanipekun M. 2019. Theoretical investigation of energy-saving potential of eco-friendly R430A, R440A and R450A refrigerants in a domestic refrigerator. Iranian Journal of Science and Technology Transactions of Mechanical Engineering, 42,103-112.
18. Zhang, J., Kærn, M. R., Ommen, T., Elmegaard, B.and Haglind, F. 2019. Condensation heat transfer and pressure drop characteristics of R134a, R1234ze(E), R245fa and R1233zd(E) in a plate heat exchanger. Int. J. Heat Mass Transf. 128,136-149.
19. Gill, J., Singh, J., Ohunakin O. S. and Adelekan D. S. 2019. Exergy analysis of vapor compression refrigeration system using R450a as replacement of R134a. Journal of Thermal Analysis and Calorimetry, 136, 857-872.
20. Khalil, A., Kabeel, A. E., Bassuoni, M. M. and Raslan, M. S. 2016. Comparative Experimental Study of Low GWP Alternative for R134a in a Walk-in Cold Room. Mansoura Engineering Journal, (MEJ) 41(1),31-40.
21. Direk, M. and Yuksel, F. 2020. Experimental evaluation of an automotive heat pump system with R1234yf as an alternative to R134a. Arabian Journal for Science and Engineering, 45 (2),719-728.
22. Dikmen, E., Şencan Şahin, A., Deveci Ö. İ. and Akdağ, E. 2020. Comparative Performance Analysis of Cascade Refrigeration System Using Low GWP Refrigerants. El-Cezerî Journal of Science and Engineering, 7(1),338-345.
23. Agarwal, S., Arora, A. and Arora, B. B. 2021. Energy and Exergy Investigations of R1234yf and R1234ze as R134a Replacements in Mechanically Subcooled Vapour Compression Refrigeration Cycle. Journal of Thermal Engineering, 7(1),109-132.
24. Yıldız, A. and Yıldırım, R. 2021. Investigation of using R134a, R1234yf and R513A as refrigerant in a heat pump. International Journal of Environmental Science and Technology, 18,1201-1210.
25. Dincer İ. and Kanoğlu, M. Refrigeration systems and applications, Second edition, Wiley, United Kingdom, 2010.
26. Chiasson, A. D. Geothermal heat pump and heat engine systems, First edition, Wiley, USA, 2016. 016.