Contents - Index
R152a uses the fundamental equation of state to determine thermodynamic properties developed from the following reference:
"Equation of State from 1-1-DiFluoroethane, R152a", Y. Kim, C. Borgnakke, and R. Sonntag, Intl. Journal of Energy Research, Vol. 21, 575-589, 1997. This equation is valid for temperatures between 213 K and 433 K at pressures up to 20 MPa.
The values of specific enthalpy and entropy are referred to 200 kJ/kg and 1.00 kJ/kg-K, respectively for the state of saturated liquid at 273.15 K.
Liquid phase viscosity and conductivity data are from the generalized correlation described by:
M.J. Assael, N.K. Dalaouti, A.A. Griva, and J.H. Dymond,
"Viscosity and Thermal Conductivity of Halogenated Methane and Ethane Refrigerants",
IJR, Vol. 22, pp. 525-535, 1999.
These property correlations are applicable over the same range as the equation of state.
Krauss, R., Weiss, V.C., Edison, T.A., Sengers, J.V. and Stephan, K.,
"Transport Properties of 1-1-Difluoroethane (R152a), I
ntl. Journal of Thermophysics, Vol. 17, No. 4, 1996, pp. 731-757.
The range of the gas phase data were extended with information from the NIST REFPROP 6 program (M.O. McLinden, S.A. Klein, E.W. Lemmon and A.P. Peskin, Physical and Chemical Properties Division, National Institute of Standards and Technology, Boulder, CO 80303, 1995.)
Gas-phase viscosity: 180 K to 433
Gas-phase thermal conductivity: 180 K to 433 K
Surface tension data are provided using the information in:
Mulero, A., Cachadina, I, and Parra, M.
"Recommended Correlations for the Surface Tension of Common Fluids"
J.Phys. Chem Ref. Data, Vol. 41, No.4, 2012.
Fluid Property Information