Prediction of Phase Equilibria for Refrigerant Mixtures of Difluoromethane (HFC-32), 1,1,1,2-Tetrafluoroethane (HFC-134a), and Pentafluoroethane (HFC-125a) Using SAFT-VR

1998 ◽  
Vol 102 (39) ◽  
pp. 7632-7639 ◽  
Author(s):  
Amparo Galindo ◽  
Alejandro Gil-Villegas ◽  
Paul J. Whitehead ◽  
George Jackson ◽  
Andrew N. Burgess
Keyword(s):  
Phase Equilibria ◽  
Refrigerant Mixtures ◽  
Hfc 134A

Performance Evaluation of Two Azeotropic Refrigerant Mixtures of HFC-134a With R-290 (Propane) and R-600a (Isobutane)

1994 ◽  
Vol 116 (2) ◽  
pp. 148-154 ◽  
Author(s):  
M. S. Kim ◽  
W. J. Mulroy ◽  
D. A. Didion
Keyword(s):  
Performance Evaluation ◽  
Heat Pumps ◽  
System Capacity ◽  
Coefficient Of Performance ◽  
Mass Percentage ◽  
Air Conditioners ◽  
Refrigerant Mixtures ◽  
Hfc 134A ◽  
Environmentally Safe ◽  
R 134A

The reduction in chlorofluorocarbon (CFC) and hydrochlorofluorocarbon (HCFC) production and the scheduled phase-out of these ozone-depleting refrigerants require the development and determination of environmentally safe refrigerants for use in heat pumps, water chillers, air conditioners, and refrigerators. This paper presents a performance evaluation of a generic heat pump with two azeotropic refrigerant mixtures of HFC-134a (1,1,1,2-tetrafluoroethane) with R-290 (propane) and R-600a (isobutane); R-290/134a (45/55 by mass percentage) and R-134a/600a (80/20 by mass percentage). The performance characteristics of the azeotropes were compared with pure CFC-12, HFC-134a, HCFC-22, and R-290 at the high temperature cooling and heating conditions including those using liquid-line/suction-line heat exchange. The coefficient of performance of R-290/134a is lower than that of HCFC-22 and R-290, and R-134a/600a shows higher coefficient of performance than CFC-12 and HFC-134a. The capacity for R-290/134a is higher than that for HCFC-22 and R-290, and R-134a/600a exhibits higher system capacity than CFC-12 and HFC-134a. Experimental results show that the discharge temperatures of the studied azeotropic mixtures are lower than those of the pure refrigerants, CFC-12 and HCFC-22.

Viscosity Measurements of Binary and Multicomponent Refrigerant Mixtures Containing HFC-32, HFC-125, HFC-134a, HFO-1234yf, and CO2

2020 ◽  
Vol 65 (9) ◽  
pp. 4252-4262
Author(s):  
Xiaoxian Yang ◽  
Arash Arami-Niya ◽  
Xiong Xiao ◽  
Dongchan Kim ◽  
Saif Z.S. Al Ghafri ◽  
...  
Keyword(s):  
Viscosity Measurements ◽  
Refrigerant Mixtures ◽  
Hfc 134A
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