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