Measurement and Correlation of the Thermal Conductivity of Pentafluoroethane (R125) from 190 K to 512 K at Pressures to 70 MPa

Published

April 6, 2006

Author(s)

Richard A. Perkins, Marcia L. Huber

Abstract

New experimental data on the thermal conductivity of pentafluoroethane (R125) are reported that allow the development of an improved wide-range correlation. These new experimental data, covering a temperature range from 190 K to 390 K and a pressure range of 0.1 to 70 MPa, are used together with available data from the literature to develop a correlation for the thermal conductivity of R125 that covers the temperature range from 190 K to 512 K. The experimental data reported here have an uncertainty less than 1% for measurements removed from the critical point and for gas at pressures above 1 MPa, which increases to 3% in the critical region and for gas at low pressures (<1 MPa). The quality of the primary data sets is such that the thermal-conductivity correlation for R125 is estimated to have an uncertainty of about 3 % at a 95 % confidence level, with the exception of state points near the critical point and the dilute gas, where the uncertainty of the correlation increases to 5 %.

Citation

Journal of Chemical and Engineering Data

Volume

51

Pub Type

Journals

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Keywords

correlation, critical enhancement, data, pentafluoroethane, R125, thermal conductivity, transient hot wire

Citation

Perkins, R. and Huber, M. (2006), Measurement and Correlation of the Thermal Conductivity of Pentafluoroethane (R125) from 190 K to 512 K at Pressures to 70 MPa, Journal of Chemical and Engineering Data, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50147 (Accessed April 20, 2024)