The viscosity of compressed liquid 1,1,1,3,3-pentafluoropropane (R245fa) and 1,1,1,3,3,3-hexafluoropropane (R236fa) has been measured with a new vibrating-wire viscometer. Measurements for R245fa were carried out at 12 temperatures in the range from (263 to 373) K and at pressures from slightly above saturation up to 40 MPa, except for the isotherms at 373.14 K where the maximum pressure was 35 MPa. With regard to R236fa, measurements were performed at temperatures between (253 and 373) K and at pressures from slightly above saturation up to 40 MPa. The combined expanded uncertainty of these results with a level of confidence of 0.95 (k = 2) is about +- 2.8 %. The scheme based on a hard-spheres model was used to correlate the experimental results. The average absolute deviation of the experimental results from the correlations for R245fa and R236fa is 0.5 % and 0.43 %, respectively. Small extrapolations of the present correlation scheme to the saturation line were performed to enable a comparison with literature results at saturation pressure.
Compounds
#
Formula
Name
1
C2H2F4
1,1,1,2-tetrafluoroethane
2
C3H3F5
1,1,1,3,3-pentafluoropropane
3
C3H2F6
1,1,1,3,3,3-hexafluoropropane
4
C7H8
toluene
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.