Thermodynamic analysis of usage of R134a, R1234yf, R450A, R513A, and R515B in the mechanical vapor compression refrigeration system
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Tarih
2023
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Gazi Universitesi
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In this study, the effects of the refrigerant type on the compressor power, heat rejection rate from the condenser, COP, second law efficiency, and mass flow rate of the refrigerant were determined in the VCRS. As a result, compressor power increased by 5.62% for R1234yf, 2.35% for R450A, 3.41% for R513A, and 2.88% for R515B compared to R134a. Thus, it was observed that COP decreased by 5.32% for R1234yf, 2.30% for R450A, 3.30% for R513A, and 2.80% for R515B compared to R134a. These COP values of the system were given in (Figure Presented). Purpose: In this study, it is aimed that the usage of R134a and its alternatives R1234yf, R450A, R513A, and R515B refrigerants are examined with the help of a theoretical model developed in the EES program using experimental data in terms of the first and second laws of thermodynamics in a mechanical vapor compression refrigeration system. Theory and Methods: In the study, the effects of the refrigerant type on the compressor power, heat rejection rate from the condenser, COP, second law efficiency, and mass flow rate of the refrigerant were determined using the theoretical model verified with the experimental data. Results: As a result, compressor power increased by 5.62% for R1234yf, 2.35% for R450A, 3.41% for R513A, and 2.88% for R515B compared to R134a. Thus, it was observed that COP decreased by 5.32% for R1234yf, 2.30% for R450A, 3.30% for R513A, and 2.80% for R515B compared to R134a. Similarly, it was observed that the second law efficiency decreased by 5.32% in case of the usage of R1234yf, 2.30% in case of the usage of R450A, 3.29% in case of the usage of R513A, and 2.80% in case of the usage of R515B compared to R134a. Hence, it has been determined that the closest refrigerant to R134a in terms of the COP and the second law efficiency is R450A. Conclusion: In conclusion, it has been determined that the closest alternative refrigerant to R134a in terms of performance parameters is R450A, followed by R515B. In future studies, it is recommended to investigate whether these two refrigerants can be used directly instead of R134a in existing systems using R134a. It is also beneficial to conduct research on the usage of these refrigerants for new refrigeration systems. © 2023 Gazi Universitesi Muhendislik-Mimarlik. All rights reserved.
Açıklama
Anahtar Kelimeler
Alternative refrigerants, Global warming potential, R134a, Refrigeration system, Thermodynamic analysis
Kaynak
Journal of the Faculty of Engineering and Architecture of Gazi University
WoS Q Değeri
Scopus Q Değeri
Q2
Cilt
39
Sayı
1
