Contents - Index
AMMONIA or R717
AMMONIA provides thermodynamic properties for ammonia using the fundamental equation of state developed by Tillner-Roth, Harms-Watzenberg, and Baehr, "Eine neue Fundamentalgleichung fur Ammoniak", DKV-Tagungsbericht 20:167-181, 1993.
The default 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. The reference state can be changed using the $Reference directive.
Viscosity is provided using the representation of:
Fenghour, A., et al,
"The Viscosity of Ammonia",
J. Phys. Chem. Ref. Data, Vol. 24, No., 5, 1995.
Thermal conductivity information is based on the correlation of:
Tufeu, R., et al.,
"Thermal conductivity of ammonia in a large temperature and pressure range including the critical region,"
Ber. Bunsenges. Phys. Chem., 88:422-427, 1984.
The critical point enhancement to the thermal conductivity suggested by these authors 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
A computationally more efficient but potentially less accurate formulation for ammonia properties is available with fluid name AMMONIA_mh.
Fluid Property Information