Picture of Modeling a Distillation Tower in HYSYS
This instructable will guide you, step-by-step, through modeling an elementary distillation tower using the HYSYS software. Using HYSYS can drastically reduce the amount of time spent doing distillation tower calculations by hand. While it may take 1-2 hours to fully complete and understand the model, it is much faster and more reliable than doing numerous calculations by hand. HYSYS also allows the user to modify tower or stream conditions to see how the modifications affect other streams with a few clicks, rather than with numerous more pages of calculations! Please not that the following tutorial is designed for Chemical Engineering students who are familiar with separations and related terminology. It is also expected that the user has already downloaded and is using HYSYS version 8.0 on a Windows computer. 

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Step 1: What You'll Need

Picture of What You'll Need
Parts/Tools Required:

• Computer & Internet access

• HYSYS software downloaded

• License to run HYSYS (usually provided by university)

Step 2: Opening HYSYS

Picture of Opening HYSYS
Once HYSYS is installed on your computer, the next step is to open the software. The HYSYS software can be found using the following path from the Windows start menu:

     1. Start > All Programs > AspenTech > Aspen HYSYS > Aspen HYSYS 

While you may have more or less programs in the "Aspen HYSYS" folder, the only one needed to model a distillation tower is the main "Aspen HYSYS" program (highlighted above). Again, please note that this tutorial is directed towards Windows users. If you are In order to run HYSYS on a Mac computer you must first install a Windows operating system.

Step 3: Create a New Case

Picture of Create a New Case
New Case.PNG
After opening HYSYS, you will see the main screen (Figure 1). To begin modeling the distillation tower, open a new case.

       1. Click: file > new > new case.

If you prefer using keyboard shortcuts, 
       press: Control + n

This step is summarized in Figure 2.

The HYSYS main screen also displays software news, recent cases, and some helpful "getting started" links (these are labelled in Figure 2).