Combining the entropy-scaling concept and cubic- or SAFT equations of state for modelling thermal conductivities of pure fluids

The transport properties of a fluid show complex dependence with temperature and pressure due to the combination different phenomena occurring at microscopic scale. entropy scaling concept aims describing this behavior by expressing reduced as one-variable functions Tv-residual entropy, thermodynamic quantity that can be straightforwardly estimated an equation state (EoS). In work, reformulated version Rosenfeld's original approach is proposed in order calculate thermal conductivities pure fluids. A specifically developed conductivity expression was correlated function recently our group correlate viscosities self-diffusion coefficients. involved definition entropy-scaling variables (that are residual entropies, densities, heat capacities) were either I-PC-SAFT or tc-PR equations (EoSs) thus leading two models. Each them validated against large database around 90,000 experimental encompassing liquid, gas supercritical states for 119 chemical species belonging 11 families such n-alkanes, alkenes, alcohols, HFC-CFC etc. For each model, component-specific, chemical-family specific universal parameters proposed. Working EoSs, obtained MAPEs (Mean Absolute Percent Errors) respectively 3.3% 3.4% when model considered 9.7% 5.6% they selected meanwhile 11.2% 9.2% assumed universal.