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Thermodynamic and transport properties of gases for use in fuel cell modeling.
A significant part of the first few years of my PhD were spent creating
a tool chest of subroutines for use in SOFC modeling. The following pages
present the majority of the data used in these routines. Although I have included
a few representative plots, most of the data will have to speak for itself.
Please let me know if further clarification is required.
Most of what is given here was presented in my first paper 'Thermodynamic
and transport properties of gases for use in solid oxide fuel cell modeling'
[26]. The major additions are inclusion of enthalpy and entropy data and reduced
(quadratic) coefficient sets for speedier coding.
Enthalpy and entropy data are given in the JANAF [7] formulation. The origin
for entropy is 0 at 0 Kelvin. Enthalpy is given in the implicit enthalpy of
formation form, such that atomic species (02, N2, H2) have 0 enthalpy at 298.15
K, with enthalpies of formation used to relate the enthalpies of compound
species (CO, CO2, H2O, CH4) to a common origin. Under this formulation enthalpy
changes due to chemical reaction (such as water gas shift) are implicitly
included simply by defining the change in composition. Enthalpy and Entropy
data are derived from heat capacity data, thus ensuring thermodynamic consistancy.
For completeness, consistent LHV values for all species and enthalpies of
reaction for key SOFC reactions have been calculated.