Hello, I am currently doing my master's thesis and I am simulating a vacuum column for a petrochemical process. Now I am trying to simulate the head vacuum system made up of 3 exchangers (working with vacuum pressures) in order to study the influence of the flow rate and the temperature of the water used as cooling liquid in the column vacuum. I am using Aspen HYSYS and I see that it is not possible, when configuring the exchangers with vacuum pressures they do not work for me. I am absolutely not going to include the ejectors in the simulation because from what I have been reading they are even more complicated and I cannot even find them in Aspen Hysys v.11. Still could someone provide me with some insight on this? What I can do?
Evvvrista.