Abstract
New experimental data for the thermal conductivity of 1,1,1,2,2,3,3-heptafluoro-3-methoxypropane (RE-347mcc, HFE-7000) are reported for vapor, liquid, and supercritical states. These new experimental data were obtained with transient hot-wire apparatus over the temperature range from 162.1 K to 500.1 K and at pressures from 0.04 MPa to 69.41 MPa. These data were used to develop a wide-range correlation for the thermal conductivity of the vapor, liquid, and supercritical fluid states. The experimental data reported here have an uncertainty of 1 % for the liquid and supercritical regions at higher densities (densities > 700 kg·m−3), 1.5 % for vapor and lower-density supercritical regions (pressures ≥ 1 MPa and densities < 200 kg·m−3), 3 % for supercritical states (200 kg·m−3 ≤ densities ≤ 700 kg·m−3), and 3 % for dilute vapor and supercritical states (pressures < 1 MPa). The thermal conductivity correlation developed in this work is estimated to have an expanded relative uncertainty, at a 95 % confidence level, ranging from approximately 1 % to 4.2 % that depends upon the temperature and pressure, with larger uncertainties in the critical region.
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Acknowledgements
We thank Paul Stempko and Dele Fayemi of 3M for the sample of RE-347mcc studied in the present work. We also thank Mark McLinden of NIST for sample preparation that included the freeze–thaw degassing of the sample. Finally, we thank Tom Bruno (retired) and Tara Lovestead of NIST for characterization of the sample purity.
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Perkins, R.A., Huber, M.L. & Assael, M.J. Measurement and Correlation of the Thermal Conductivity of 1,1,1,2,2,3,3-Heptafluoro-3-methoxypropane (RE-347mcc). Int J Thermophys 43, 12 (2022). https://doi.org/10.1007/s10765-021-02941-7
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DOI: https://doi.org/10.1007/s10765-021-02941-7