Abstract
Values of gaseous pρTx were measured with a compact single-sinker densimeter for {2,3,3,3-tetrafluoroprop-1-ene (HFO1234yf)+propane (HC290)} mixtures. A total of 168 data points was obtained at temperatures from (265.460 to 300.268) K, pressure up to 0.70252MPa, and mole fractions of HFO1234yf at (0.0906, 0.2546, 0.5830, 0.8116, and 1.0000). For the densimeter, values of the experimental standard uncertainty were less than 5mK for the temperature, 200Pa for the pressure, and 0.0003 for the mole fraction. When all the experimental standard uncertainties are considered, the relative uncertainty in density was estimated to be less than 0.13%. The experimental results were correlated using a truncated virial equation of state (EOS) and the Patel-Teja (PT) EOS. The virial model gives the best description of the experimental pρTx values with average absolute relative deviations of 0.080% in pressure and 0.085% in density.
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