Thermal conductivity data for refrigerant mixtures containing R1234yf and R1234ze(E)

Sofia K. Mylona, Thomas J. Hughes, Amina A. Saeed, Darren Rowland, Juwoon Park, Tomoya Tsuji, Yukio Tanaka, Yoshio Seiki, Eric F. May

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


Thermal conductivities of binary refrigerant mixtures (R125 + R152a), (R125 + R1234ze(E)), (R143a + R1234ze(E)), (R143a + R1234yf), (R1234ze(E) + R1234yf), (R125 + R1234yf), and (R134a + R1234ze(E)) were measured in the homogeneous liquid and vapour phases using the transient hot-wire technique. The measurements span temperatures from (260 to 414) K with pressures from (0.9 to 3.1) MPa. Two transient hot-wire sensors designed for measurements in the liquid and the vapour phase, respectively, were used and the relative uncertainty of both was estimated to be 1% or better for pure fluids. The performance of the sensor for the liquid phase was verified with water and toluene while argon was used to validate the sensor for the vapour phase. These measurements and previously published data were used to tune binary interaction parameters in the extended corresponding states model implemented in the NIST software REFPROP 9.1. Deviations between the tuned model and measured thermal conductivities were mostly within ±3% which is consistent with the uncertainties of the reference equations of the pure fluids.

Original languageEnglish
Pages (from-to)135-142
Number of pages8
JournalJournal of Chemical Thermodynamics
Publication statusPublished - 1 Jun 2019


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