Fluids for the A8 example simulation

This example uses a custom fluid called A8Feed that resides in the simulation-specific Model Library. We use this compositional-type fluid to model the feed stream, which has the starting composition found in the table in Process Description. The Soave-Redlich-Kwong (SRK) equation of state is suitable for the thermodynamic calculations required for the simulation. In general, equations of state do a poor job at predicting liquid densities. AVEVA Process Simulation provides a separate method option for these estimations. Because the process does not involve hydrocarbon components, we use library correlations to determine the liquid density estimations instead of using the default API method.