A COMPARATIVE ENERGETIC ANALYSIS FOR SOME LOW-GWP REFRIGERANTS AS R134a REPLACEMENTS IN VARIOUS VAPOR COMPRESSION REFRIGERATION SYSTEMS
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Tarih
2018
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Turkish Soc Thermal Sciences Technology
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, the energy parameters (i.e., cooling capacity and COP) were theoretically investigated for three different vapour compression refrigeration system (basic cycle, basic cycle with liquid-to-suction heat exchanger and two-stage cascade cycle) for which R1234yf, R1234ze(E), R513A, R445A and R450A alternative refrigerants with low GWP value were used instead of R134a. The studied refrigerants demonstrated similar thermodynamic behaviour. The exergetic efficiency of the systems was also compared. The comparison of the energy parameters was carried out for two different evaporation temperatures (-30 and 0 degrees C) and two condensing temperatures (40 and 55 degrees C). According to the calculation results, R450A which almost has the same COP values as R134a comes into prominence with 58% lower GWP value compared to R134a. Among the studied refrigeration cycles, system with LSHEX can be suggested for providing a better effect in terms of COP for the considered refrigerants and temperature cases as well as assumed system parameters. It was seen for the investigated cycles that the highest exergetic efficiency could be obtained in the case of R445A.
Açıklama
Anahtar Kelimeler
R450a, R513a, R1234yf, R134a, Cop, Exergy
Kaynak
Isi Bilimi Ve Teknigi Dergisi-Journal of Thermal Science and Technology
WoS Q Değeri
Q4
Scopus Q Değeri
Cilt
38
Sayı
2
