Contents - Index



R1234ze(E) provides thermodynamic property data for HFO-1234ze(E) (trans 1,3,3,3-tetrafluoropropene, CAS# 29118-24-9. MW 114.04 g/gmole).  The thermodynamic property data are obtained from the equation of state published in:


Ryo Akasaka

"New Fundamental Equations of State with a Common Functional Form for 2,3,3,3-Tetrafluoropropene (R-1234yf) and trans-1,3,3,3-Tetrafluoropropene (R-1234ze(E))"

Int. J. Thermophysics, Vol 32, pp. 1125-1147, 2011


The reference state h=200 kJ/kg and s=1.0 kJ/kg-K at 273.15 K for saturated liquid.


The properties are valid for temperatures between 240 K and 420 K for pressures up to 15 MPa.



Viscosity is determined using the information from:

Huber, M.L., and Assael, M.J.,

"Correlations for the viscosity of 2,3,3,3-tetrafluoroprop-1-ene (R1234yf) and trans-1,3,3,3-tetrafluoropropene (R1234ze(E))"

Int. J. of Refrigeration, Vol 21, pp. 39-45, (2016)


Thermal Conductivity

Thermal Conductivity is obtained from the correlation provided by:

Perkins, R.A. and Huber, M.L,

"Measurement and Correlation of the hThermal COnducitivity of 2,3,3,3-Tetrafluorprop-1-end (R1234yf) and trans-1,3,3,3-Tetrafluoropropene (R1234ze(E))

J. of Chemical & Engineering Data, 56, 2011, pp. 4868-4874.  


Note that the critical enhancement contribution is not implemented.


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