Hi there,
I have a question related to distillation column in Hysys.
For finding actual tray without any software,I follow these steps:
1- finding Minimum Number of Trays using Fenske equation
2- Using Underwood equation to calculate Minimum Reflux
3- Multiply Rmin by 1.2 to 1.5 to find Reflux
4 -Employ Gilliland diagram to find theoretical number of trays.
5- Using O'Connell Diagram to find tray efficiency and then calculate Actual Tray Number.
In Hysys, to calculate these parameters, I use shortcut Column, then the shortcut column will result in finding actual tray. Next, I use these data to run a Distillation column in Hysys.
I have a problem here,
Shortcut column gives the actual tray, and then it is needed to use the number for running the distillation column. in distillation column there is a place to enter tray efficiency. Why is the tray efficiency option offered by Hysys? because in shortcut column by giving the actual tray number, efficiency was considered and there is no need to use it again in distillation column.
Thanks