Moderator: jasper
by rhsrxs » 09 December 2013, 02:58
I was attempting to take the Acetone Absorber Henrys Law example in Chemsep and put into a COCO flowsheet. After several warnings I get "failed to solve unit Column_1. Flash (PVF) failed on bottom product" Attached is the fsd. Any help would be appreciated.
- Attachments
-
- AcetoneAbsorber.fsd
- (63.94 KiB) Downloaded 698 times
-
rhsrxs
-
- Posts: 26
- Joined: 24 October 2012, 21:29
by rhsrxs » 09 December 2013, 03:39
Had to add activity coefficients to property package. If I go and zero out the undefined NTRL parameters I get the simulation to solve.
-
rhsrxs
-
- Posts: 26
- Joined: 24 October 2012, 21:29
by jasper » 19 December 2013, 09:12
Sorry for the delay in responding; I was travelling.
The property package uses Peng Robinson, not NTRL. Is this intended? Why are you using different thermo in the column than in the flowsheet?
-
jasper
-
- Posts: 1128
- Joined: 24 October 2012, 15:33
- Location: Spain
-
by rhsrxs » 19 December 2013, 19:18
I changed the COCO property package to NTRL. I then did a comparison of COCO and ChemSep. The only real major difference I came up with was the reported liquid discharge temperature of Column 2. COCO reports a temperature of 56.9216 °C. If you call up the ChemSep GUI the temperature of 33.4175 °C is reported.
This was basically an academic exercise to learn more about COCO and how to become more effective in its use.
- Attachments
-
- Acetone Absorber COCO ChemSep comparison.fsd
- (244.5 KiB) Downloaded 688 times
-
rhsrxs
-
- Posts: 26
- Joined: 24 October 2012, 21:29
Return to COCO (AmsterCHEM)
Who is online
Users browsing this forum: No registered users and 7 guests