Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Measurements of the Speed of Sound in the Refrigerants HFC227ea and HFC365mfc in the Liquid Region

Meier, K., Kabelac, S.
J. Chem. Eng. Data 2013, 58, 2, 446-454
ABSTRACT
Accurate measurements of the speed of sound in the two refrigerants HFC227ea and HFC365mfc have been carried out by a double-path-length pulse-echo technique. The measured data for HFC227ea cover parts of the liquid and supercritical regions in the temperature range from (280 to 420) K with pressures up to 50 MPa, while those for HFC365mfc extend in the liquid region from (250 to 420) K with pressures to 100 MPa. The measurement uncertainties amount to 3 mK for temperature, 0.01 % for pressures below 10 MPa, 0.005 % for pressures between (10 and 100) MPa, 0.03 % for speed of sound in HFC227ea, and 0.04 % for speed of sound in HFC365mfc. Comparisons with literature data demonstrate the high accuracy of the measurements.
Compounds
# Formula Name
1 C3HF7 1,1,1,2,3,3,3-heptafluoropropane
2 C4H5F5 1,1,1,3,3-pentafluorobutane
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 1
  • Speed of sound, m/s ; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • PULSEH:UFactor:0.5
  • 160
  • POMD
  • 2
  • Speed of sound, m/s ; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • PULSEH:UFactor:0.5
  • 229