2 replies to this topic

[Sebastian L]

Hello everyone!
I'm new in this Forum and i hope u can help me with my Aspen/Fortran problem.
I hace a simulation in Aspen with Rplug-reactors. For the heat transfer i want to create an user subroutine to get better results. The "User Model" Dokumentation of Aspen do not help and i have only the examplefile "usrplq" in my Aspen directory.

Does someone have an examplecode/file for heat transfer in Aspen Plus/Polymersplus?
Or can tell me which variable i have to work with for the heat transfer?

[Sebastian L]

I added this simple equtations to the usrplq: (Aspen+ 2006)
QTCP=5.d10
QTCA =2.d10
QTPA=0.d0

but i get the same results for different values...

[leon_aurel]

I don't understand what do you mean by "you want to get better result by adding more heat transfer equation"? Doesn't the template R-Plug reactor already have its own heat transfer equation?

Also you add 3 constants in the usrplq QTCP, QTCA, and QTPA and define their values. Have you define these 3 constants as something that aspen recognized?

And what do you mean by "you get the same results for different values"? What variable that you manipulate and what variable values stay the same?