DWSIM is a great Thing and very useful for me - many thanks :-)
But there are some bugs in the rigorous distillation column: There is no field to put in the reflux Ratio Some vapour flow is indicated at the bottom. the bottom flow out of the unit Operation shall be liquid.
* same problem at the top flow; there is an overhead vapour flow even when I set a total condenser. Flow shall be liquid.
Change of feed temperature
I can't change the feed temperature. Even when i set a new temperature, the original value will be used for calculation again.
Hopefully you can provide a solution for both items.
BR
Christian
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
In the Configuration Window > Thermodynamics tab > Advanced section, uncheck the "Force PH calculation" option, this will allow you to change the temperature of the stream.
You can change the reflux ratio in the Condenser Specification section in the property grid. It is indicated as "Stream Ratio".
Set the PT/PV flash tolerances in the Property Package configuration window as in the attached screenshot (from 0.001 to 1E-12).
DWSIM is a great Thing and very useful for me - many thanks :-)
But there are some bugs in the rigorous distillation column:
There is no field to put in the reflux Ratio
Some vapour flow is indicated at the bottom. the bottom flow out of the unit Operation shall be liquid.
* same problem at the top flow; there is an overhead vapour flow even when I set a total condenser. Flow shall be liquid.
Change of feed temperature
I can't change the feed temperature. Even when i set a new temperature, the original value will be used for calculation again.
Hopefully you can provide a solution for both items.
BR
Christian
Hi Christian,
Can you attach your simulation file?
Thanks
Daniel
Hi Daniel,
here is the file
BR
Christian
Hi Christian,
In the Configuration Window > Thermodynamics tab > Advanced section, uncheck the "Force PH calculation" option, this will allow you to change the temperature of the stream.
You can change the reflux ratio in the Condenser Specification section in the property grid. It is indicated as "Stream Ratio".
Set the PT/PV flash tolerances in the Property Package configuration window as in the attached screenshot (from 0.001 to 1E-12).
See if it works for you, it worked here.
Regards,
Daniel
Daniel, your're the man.
many thanks for your help.
I can change the temperature now.
The stream ratio is the reflux ratio - I understand now.
I have changed the PT/PV flash tolerance from 0.001 to 1E-12. It works perfect now.
BR
Christian