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Saturated-Liquid Viscosity of Ten Binary and Ternary Alternative Refrigerant Mixtures. Part 1: Measurements



Arno R. Laesecke, R F. Hafer, Dylan Morris


The saturated liquid viscosity of ten binary and ternary refrigerant mixtures composed of difluoromethane (R32, 1,1,1,2-tetrafluoroethane (R134a), pentafluoroethane (R125), and propane (R290) were measured in a sealed gravitational capillary viscometer with a straight vertical capillary from 245 to 345 K or to a maximum vapor pressure of 3 Mpa. The maximum uncertainty of the measurements is estimated to be at 2.8% for the mixtures R32 + propane. The largest contribution to the total uncertainty is that of the saturated liquid and vapor densities of the mixtures, which had to be estimated. Comparisons with viscosity data from the literature show agreement within the mutual uncertainty for all but one data set. Similar agreement is found with predicted viscosities using the extended corresponding-states model in NIST standard reference Database 23 (REFPROP), except for the mixtures of the polar fluids R32 and R134a with the nonpolar propane. Their viscosity-composition dependences are strongly nonlinear.
Journal of Chemical and Engineering Data
No. 2


alternative refrigerants, binary mixtures, extended corresponding states method, propane, R125, R134a, R290, R32, sealed gravitational capillary viscomete


Laesecke, A. , Hafer, R. and Morris, D. (2001), Saturated-Liquid Viscosity of Ten Binary and Ternary Alternative Refrigerant Mixtures. Part 1: Measurements, Journal of Chemical and Engineering Data, [online], (Accessed April 16, 2024)
Created February 10, 2001, Updated February 17, 2017