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ESDU 97028 B

ESDU 97028 B 2003-MAY-01 Thermophyscal propertes of sulphur hexafluorde

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ESDU 97028 provides evaluated thermophysical properties data for sulphur hexafluoride on the saturation line, in the ideal gas and dilute gas state, in the single phase gas and supercritical region. The recommended values of the transport properties are based on those data which are considered to be the best available; the recommended values for the thermodynamic properties are derived from an equation of state. Equations based on a critical evaluation of experimental data in the literature are given for the variation with temperature along the saturation line for the following liquid and vapour properties: density, specific enthalpy, specific heat capacity at constant pressure, dynamic viscosity and thermal conductivity. Also given are equations for the variation with temperature along the saturation line of the vapour pressure, latent heat of vaporisation and surface tension. In the single phase, equations are given for the variation with temperature of the specific heat capacity at constant pressure and specific enthalpy in the ideal gas state, and the dynamic viscosity and thermal conductivity in the dilute gas state. Single phase data for the density, compression factor specific enthalpy, specific entropy, isobaric and isochoric specific heat capacities at fixed values of temperature and pressure are tabulated for the gas phase and supercritical region. The saturation line properties, in SI units, calculated from the equations are tabulated at 5 K intervals and at 5 degree Celsius intervals from the triple point to the critical temperature for the vapour pressure, saturation densities and surface tension and to within at least 10 kelvin of the critical temperature for the remainder. Ideal and dilute gas properties, also in SI units calculated from the equations are tabulated at 20 K and at 20 degree Celsius intervals from the triple point to 1000 K. The single phase properties, in SI units are presented for temperatures from -50 to 100 degree Celsius inclusive and for pressures up to 10 000 kPa. In the absence of experimental data, the tabulated data are extrapolated or predicted values and these are indicated in the tables. Conversion factors to facilitate use of the equations and tables in British units are included. A full bibliography is given of the sources consulted and the uncertainties of the tabulated data are discussed in the text.

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