Thermodynamics Research Center / ThermoML | International Journal of Thermophysics

Ideal-Gas Heat Capacity for 2,3,3,3-Tetrafluoropropene (HFO-1234yf) Determined from Speed-of-Sound Measurements

Kano, Y.[Yuya], Kayukawa, Y.[Yohei], Fujii, K.[Kenichi], Sato, H.[Haruki]
Int. J. Thermophys. 2010, 31, 11-12, 2051-2058
The isobaric ideal-gas heat capacity for HFO-1234yf, which is expected to be one of the best alternative refrigerants for HFC-134a, was determined on the basis of speed-of-sound measurements in the gaseous phase. The speed of sound was measured by means of the acoustic resonance method using a spherical cavity. The resonance frequency in the spherical cavity containing the sample gas was measured to determine the speed of sound. After correcting for some effects such as the thermal boundary layer and deformation of the cavity on the resonance frequency, the speed of sound was obtained with a relative uncertainty of 0.01%. Using the measured speed-of-sound data, the acoustic-virial equationwas formulated and the isobaric ideal-gas heat capacity was determined with a relative uncertainty of 0.1%. A temperature correlation function of the isobaric ideal-gas heat capacity for HFO-1234yf was also developed.
# Formula Name
1 C3H2F4 2,3,3,3-tetrafluoro-1-propene
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 ; Gas
  • Temperature, K; Gas
  • Pressure, kPa; Gas
  • Gas
  • Spherical cavity resonance method
  • 41