Introduction to
DESIGN II for
Windows
Instructor: Murugan Selvan
Scopes Covered
The DESIGN II for Windows interface
Tutorial 1: How DESIGN II works
How to draw a flowsheet
Component selection & input
Equipment specification
Execute the simulation
The simulation results interface
Getting Started
Double-click on the DESIGN II for
Windows icon on the your PC desktop
Alternate way: “Start / Program /
DESIGN II / DESIGN II for
Windows”.
Maximize the DESIGN II window.
From the Start Button
The License Window
Setting for New Drawing
DESIGN II Interface
Printing
New
drawing
Zoom
Out
Text
Zoom In
Saving a
file
Opening
a file
Line
Equipment
Arrow
Tutorial 1: Expander Plant
Expander Plant: Flowsheet Description
 Flowsheet description:
 A single stage expansion of a light hydrocarbon
stream
 First, feed stream is cooled through a feed chiller
(X-1) & any liquid is removed with a vertical
separator (F-2).
 The vapor is expanded (E-4) & liquids separated
using a second vertical separator (F-3).
Expander Plant: Equipment
Specifications
Equipment
Tag
Specification
Feed chiller
X-1
Temp out = 35ºF
Delta pressure = 10 psi
2 vertical
separator
F-2
Adiabatic flash
Delta pressure = 0
Expander
E-4
Pressure out = 275 psig
Efficiency = 0.80
Expander Plant: Feed stream & Basic
Thermodynamics Specifications
 Feed stream specification:
Component
Lbmol/hr
Methane
6100
Ethane
500
Propane
200
N-Butane
100
N-Pentane
100
N-Hexane
70
 Thermodynamics methods used:
 K-Value = API Soave
 Enthalpy = API Soave
 Density = Yen Woods (STD)
Specifications
T = 90ºF
P = 980 psig
Lay Out the Equipment
Showing Snap Points
Equipment with Snap Points
Adding Streams & Labels
Adding Streams & Labels
Adding Flow Direction Arrows
Add a Title to the Drawing
Working Session
Before we proceed further, let’s look
through a process simulation diagram
(PSD) practice.
Flowsheet Specification &
Execution
Specify the Feed Stream
Stream Specification Windows
Stream Specification Windows
Component Selection Windows
Search Your Components: by Name
Select all the Components in the System
Back to the Stream Specification Window
Enter Equipment Specification: X-1
Equipment Specification Window
HEX (X-1) Specification Window
Flash Drum Specification
F-1 Specification Window
F-1 Specification Window
Expander Specification
E-3 Specification Window
E-3 Specification Window
Back to DESIGN II Window
Specify the Thermodynamics Methods
Thermodynamics Specification Window
To Execute the Simulation
SOLUTION HAS BEEN REACHED!!!
Working Session
Remember, as always practice make perfect!
DESIGN II Results Interface
• DESIGN II native output file
• Microsoft Excel interface
SOLUTION HAS BEEN REACHED!!!
View the Simulation Results
View the Simulation Results
Simulation Result in Excel Interface
MS Excel
Simulation Result in Excel Interface
View result in Spreadsheet:
Stream Summary: only stream data & results
Equipment Summary: only equipment summaries
are displayed
Material Summary: Material balances results are
displayed
The Works: All results are transferred to EXCEL
Stream Summary in DESIGN II Output File
Stream Summary in MS Excel
Right Click to get the Stream Result
Stream Specification Window Again …
Stream
Result
Result of Stream 7
Stream Data Box
Path: Simulation / Stream Data Box
Showing All Streams in Data Box
… or Select as Your Wish
Stream Data Box Details
Changing Units in Stream Data Box
Stream Data Box Items 1
Working Session
Let’s try it again …
Thank You