A simple method of estimating the enthalpy of petroleum fractions

A simple method, requiring the characterization factor as the only input, i s proposed to predict the enthalpies of the liquid and vapor petroleum frac tions over a wide range of temperatures and pressures. This method showed a comparable accuracy in the prediction of the petroleum fraction enthalpy w ith much more complicated predictive methods in the literature. The propose d method gave overall deviations of +/-2.48% when tested on the data for li quid fractions and +/-1.23% when tested on the data for vapor fractions.