Experimental investigation on the low-GWP HFC/HFO blends R454A and R454C in a R404A refrigeration system
Yükleniyor...
Tarih
2021
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier SCI LTD.
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
This study experimentally compares the high-GWP R404A with two low-GWP HFC/HFO blends, R454A (35% R32 + 65% R1234yf) and R454C (21.5% R32 + 78.5% R1234yf). Three evaporation temperatures ( -5, 0 and + 5 degrees C) and three condenser temperatures (30, 40, 50 degrees C) were studied. For all covered cases of condenser temperatures, the measured compressor power consumption was reduced by about 6% and 15% for R454A and R454C, respectively compared to R404A. The cooling capacity of R454A was higher than R404A by 11%, approximately, although the mass flow rate values have been reduced using the studied alternative refrigerants. As a result, the COP values of R454A and R454C were greater than R404A by about 14% and 10%, respectively. Although the discharge temperatures of the alternative blends were determined to be higher than that obtained for R404A, they are suitable for the tested operating conditions. The proposed alternative refrigerants could be used directly in available R404A systems without any constructional modification requirement if safety concerns can be solved. Moreover, it is possible to have higher cooling capacity and COP values as well as reduced environmental impacts. (c) 2021 Elsevier Ltd and IIR. All rights reserved.
Açıklama
Anahtar Kelimeler
HFC, HFO mixture, Low-GWP, Refrigeration systems, R404A, R454A, R454C
Kaynak
International Journal of Refrigeration
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
128
Sayı
Künye
Oruç, V. ve Devecioğlu, A.G. (2021). Experimental investigation on the low-GWP HFC/HFO blends R454A and R454C in a R404A refrigeration system. International Journal of Refrigeration, 128, 242-251
