Measurements of the Thermal Conductivity of 1,1,1,3,3-Pentafluoropropane (R-245fa) and Correlations for the Viscosity and Thermal Conductivity Surfaces

Published

July 21, 2016

Author(s)

Richard A. Perkins, Marcia L. Huber, Marc J. Assael

Abstract

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.

Citation

Journal of Chemical and Engineering Data

Volume

61

Issue

9

Pub Type

Journals

Download Paper

https://doi.org/10.1021/acs.jced.6b00350

Local Download

Keywords

1, 1, 1, 3-3-Pentafluoropropane, correlation, R245fa, thermal conductivity, transient hot wire, viscosity

Citation

Perkins, R. , Huber, M. and Assael, M. (2016), 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 October 9, 2025)