The rational approximation method in the prediction of thermodynamic properties for SOFCs

摘要: Abstract The aim of this work is to present the method rational approximation as an alternative technique for finding empirical models thermophysical properties relevant fluids solid oxide fuel cells (SOFCs). used here calculating isobaric heat capacity, entropy formation, enthalpy, Gibbs energy thermal conductivity and dynamic viscosity, at 0.1 MPa, important gases in SOFCs (CH4, C2H6, C3H8, CH3OH, C2H5OH, CO2, CO, H2, H2O, O2, N2, NH3). Rational approximations are well known their ability extrapolate, has been main reason adopting paper, since it often difficult expensive have experimental data entire range interest. A survey was conducted collecting required information, finally 75 were generated all with a coefficient determination R2=99%.