Part I discussed the limitation of process simulation software when it comes to estimating viscosity of liquid fuels. The properties of pseudo-components do not contain information of viscosity and thus would not estimate the viscosity of heavy oil to the order of magnitude which is more realistic.
While it is also possible to obtain heating values (HHV and LHV), the process simulation software does not seem to always calculate the desired values. Based on my experience the software would calculate the heating values in some cases while in others the values are blank.
Similar to the kinematic viscosity of binary fuel oil mixture in Part I, an API method exists to fast-track the estimation of the heating values of petroleum products (or synfuels).
The method was tested and was found to be within the accuracy of ±3%. This method applies to condensates, crude oils and all the petroleum fractions.
The spreadsheet below employs only the gravity and known amount of impurities in liquid fuel to estimate HHV and LHV.