Computer Tools>HYSYS Plant>Distillation Tutorial

Up

Simulation Basis Manager

Once you are in the Simulation Basis Manager, you are ready to begin defining the fluids to be used in your distillation model. The first step is to select your thermodynamic basis to represent the fluid properties. In the examples that follow, we will use the Peng-Robinson SV ( PRSV is a two-fold modification of the PR equation of state that extends the application of the original PR method for highly non-ideal systems) ( Note that different models give different results, as you will see in your Thermodynamics II class. You will want to experiment with other choices).

1. To define the fluid properties, click on the ADD button. A Fluid package window will appear. Then scroll down on the Base Property Package Selection menu until PRSV is visible, select it.  Once you have selected PRSV, stay in this window. 
2. Your next step will be to choose the components used in the experiments. In the distillation column experiment of the unit laboratory, we use ethanol and isopropanol (2-propanol). To enter these choices, click on the Components tab at the bottom of the window to bring up the Components selection window. Select ethanol by typing "ethanol" in the MATCH box then by clicking on <--ADD PURE. Repeat the same procedure to select 2-propanol. (Note that you can select components by name, formula and synonyms, for example to select 2-propanol you can either click on SIMNAME and type "2-propanol" or click on FORMULA and type "c3h8o") 
3. After selecting your components, you are ready to build your system flowsheet. First close your Fluid Package window by clicking on the X button on the upper right hand corner of the Fluid Package window.

Setting Up The Simulation Environment

Now that you have completed defining the fluids In your model you are ready to begin defining the operations to be modeled. Click on Enter Simulation Environment at the bottom of the Simulation Basis Manager window to start building your simulation process flow diagram.

Equipment Description

See Equipment Description for specifications of the equipment being modeled.

Degrees of Freedom Analysis

See Degrees of Freedom Analysis for more details on fixed variables to define the equipment, independent variables specify, and dependent variable to observe.

Continuous Distillation

Continuous steady state operation of a distillation column will be modeled and simulated as the first example.