Smart questions
Smart answers
Smart people
Join Eng-Tips Forums
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Member Login




Remember Me
Forgot Password?
Join Us!

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips now!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

Join Eng-Tips
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.
Jobs from Indeed

Link To This Forum!

Partner Button
Add Stickiness To Your Site By Linking To This Professionally Managed Technical Forum.
Just copy and paste the
code below into your site.

process2318 (Chemical) (OP)
6 Apr 08 15:34
I would like a confirmation for the procedure to model a thermosyphon reboiler attached to a distillation column.

I remember the procedure I used was to define a side stripper or a separator with one theoretical tray (tray N+1) and an energy stream (representing the bottom duty), net liquid from the column bottom tray (tray N) feeds tray N+1, liquid from tray N+1 feeds tray N, vapour stream from tray N+1 feeds tray N-1, a vapour feed stream with zero flowrate feeds tray N+1. The addition of this unit operation generates a freedom degree to the simulation and a new specification is required.

I will appreciate your help in the confirmation of this procedure and what should be the specification. I got this procedure in my engineering notes, but I have no access to it.
Helpful Member!  fdomin (Chemical)
7 May 08 15:44
There´s an easier procedure without adding side stripper. It is as follows:

1-Start with a standard converged column with kettle reboiler
2-Enter the column environment. In the reboiler view change bottoms outlet to a new stream that you can name e.g "Liquid to Column"
3-In tray section change the vapor inlet from "Boilup" (vapor from kettle) to the new stream ("liquid to column").
4-Reattach "boilup" to the column in the proper stage
5-Create a side draw in the column from the bottom tray.

As you said you will need a new spec. Options could be recirculation rate, reboiler outlet temp, etc

 

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!

Back To Forum

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close