Measurements of the Thermal Conductivity of 1,1,1,3,3-Pentafluoropropane (R-245fa) and Correlations for the Viscosity and Thermal Conductivity Surfaces
Richard A. Perkins, Marcia L. Huber, Marc J. Assael
New experimental data on the thermal conductivity of 1,1,1,3,3-Pentafluoropropane (R-245fa) are reported that cover a wide range of liquid conditions. These new experimental data were made with a transient hot-wire apparatus and cover the liquid phase over a temperature range of (173 to 344) K and a pressure range of (0.1 to 71) MPa. The experimental data reported here have an uncertainty of less than 1 %. The measurements are used with selected literature data to develop correlations for the thermal conductivity. Based on the uncertainty of and comparisons with experimental data, the thermal-conductivity correlation for R245fa is estimated to have a relative uncertainty of about 2 % at a 95 % confidence level for the liquid phase at pressures to 70 MPa, and 2 % for the vapor phase. In addition, we surveyed literature data and developed a correlation for the viscosity of R245fa. The estimated uncertainty of this correlation is 3 % for the liquid phase at pressures to 40 MPa and 2 % for the vapor phase. Both correlations may be used over the temperature range from the triple point to 440 K and at pressures to 200 MPa.
, Huber, M.
and Assael, M.
Measurements of the Thermal Conductivity of 1,1,1,3,3-Pentafluoropropane (R-245fa) and Correlations for the Viscosity and Thermal Conductivity Surfaces, Journal of Chemical and Engineering Data, [online], https://doi.org/10.1021/acs.jced.6b00350, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=920723
(Accessed November 30, 2023)