# Ammonia¶

## References¶

### Equation of State¶

R. Tillner-Roth, F. Harms-Watzenberg, and H.D. Baehr. Eine neue Fundamentalgleichung fur Ammoniak (A new Fundamental Equation of State for Ammonia). In Deutscher Kaelte- und Klimatechnischer Verein Tagung 1993. 1993.

### Thermal Conductivity¶

R. Tufeu, D.Y. Ivanov, Y. Garrabos, and B. Le Neindre. Thermal Conductivity of Ammonia in a Large Temperature and Pressure Range Including the Critical Region. Bereicht der Bunsengesellschaft Phys. Chem., 88:422–427, 1984. doi:10.1002/bbpc.19840880421.

### Viscosity¶

A. Fenghour, W.A. Wakeham, V. Vesovic, J.T.R. Watson, J. Millat, and E. Vogel. The Viscosity of Ammonia. J. Phys. Chem. Ref. Data, 24:1649–1667, 1995. 5. doi:10.1063/1.555961.

### Surface Tension¶

A. Mulero, I. Cachadiña, and M. I. Parra. Recommended Correlations for the Surface Tension of Common Fluids. J. Phys. Chem. Ref. Data, 41(4):043105–1:13, 2012. doi:10.1063/1.4768782.

## Aliases¶

NH3, ammonia, R717, AMMONIA

## Fluid Information¶

Parameter, Value
General
Molar mass [kg/mol] 0.01703026
CAS number 7664-41-7
ASHRAE class B2
Formula $$H_{3}N$$
Acentric factor 0.25601
InChI InChI=1/H3N/h1H3
InChIKey QGZKDVFQNNGYKY-UHFFFAOYAF
SMILES N
ChemSpider ID 217
2D image
Limits
Maximum temperature [K] 700.0
Maximum pressure [Pa] 1000000000.0
Triple point
Triple point temperature [K] 195.495
Triple point pressure [Pa] 6091.22310813
Critical point
Critical point temperature [K] 405.4
Critical point density [kg/m3] 225.0
Critical point density [mol/m3] 13211.7771543
Critical point pressure [Pa] 11333000.0

## REFPROP Validation Data¶

Note

This figure compares the results generated from CoolProp and those generated from REFPROP. They are all results obtained in the form $$Y(T,\rho)$$, where $$Y$$ is the parameter of interest and which for all EOS is a direct evaluation of the EOS

You can download the script that generated the following figure here: (link to script), right-click the link and then save as... or the equivalent in your browser. You can also download this figure as a PDF.

## Consistency Plots¶

The following figure shows all the flash routines that are available for this fluid. A red + is a failure of the flash routine, a black dot is a success. Hopefully you will only see black dots. The red curve is the maximum temperature curve, and the blue curve is the melting line if one is available for the fluid.

In this figure, we start off with a state point given by T,P and then we calculate each of the other possible output pairs in turn, and then try to re-calculate T,P from the new input pair. If we don’t arrive back at the original T,P values, there is a problem in the flash routine in CoolProp. For more information on how these figures were generated, see CoolProp.Plots.ConsistencyPlots

Note

You can download the script that generated the following figure here: (link to script), right-click the link and then save as... or the equivalent in your browser. You can also download this figure as a PDF.