QMC Dyflo Manual

It is always best to close any open Window applications or virus utilities before installing any Windows program application. Additionally, system privileges must be provided for loading components into c:/windows/system directories.

Any previous version of the QMC PROGRAM SUITE should be removed. This is done in the Windows Control Panel, Add/Remove Programs.

1) Insert the QMC PROGRAM SUITE CD-ROM.

2) In the Windows Start Button on the Microsoft Task Bar, go to Settings, then Control Panel, then double-click on Add/Remove Programs and follow the on screen instructions.

3) Click on the Install button.

4) In the ‘Install Program from Floppy Disk or CD-ROM window’, and click next.

The Setup program should start by ‘Copying initialization files.’ If you are a first time user, the Setup may request to shutdown and restart your computer. This is a standard Microsoft setup and allows for proper registration. Click OK and allow the system to reboot. Any error during the install process should be reported to your IS administrator and/or QMC.

The Setup program will check for sufficient disk space. If there is not enough, Setup will stop the installation process and advise you to clear space before proceeding.

To start the QMC PROGRAM SUITE, click the Start button on the Microsoft Task Bar, then Programs, then QMC PROGRAM SUITE.

To have easy access to the QMC PROGRAM SUITE, create a desktop icon. Once the desktop icon is created, all you need to do is double-click the icon.

System Requirements

Computer: 486, Pentium or better

Memory: 12 MB RAM

Minimum Disk Space: 25 MB

Operating System: Microsoft Windows

Networking: Capabilities Available

Other Software: Microsoft Office

Display size Optimized for 800 x 600 pixels

Display color 256 color required, 32 bit preferred

QMC DYFLO PROGRAM for Windows

TABLE OF CONTENTS

SECTION 1 QMC DYFLO PROGRAM............................................ 2

QMC DYFLO Program Overview............................................ 4

Features and Specifications................................................... 5

SECTION 2 INSTRUCTIONS.......................................................... 7

Steps for the QMC DYFLO Program...................................... 8

SECTION 3 QMC DYFLO SCREENS........................................... 11

Flowsheet Setup Screen...................................................... 12

DYFLO Setup Screen.......................................................... 14

Physical Properties Screen.................................................. 15

Component Plots Screen..................................................... 16

Mass & Energy Balance Screen........................................... 17

Mass & Energy Plots Screen................................................ 18

Quantities and Units............................................................ 18

Spreadsheet Screen............................................................ 19

● Unit Operations

Features and Specifications

Background

The basic principles of mathematical modeling of chemical engineering problems was first published as a textbook by J.Wiley Inc. in 1966, titled, "Mathematical Modeling in Chemical Engineering", by Roger G.E.Franks

Subsequently, use of digital computers were introduced in the chemical industry so the modeling approach was amplified and extended by adopting digital technology to simulate the mathematical models developed for chemical processes. A new text book was then published (supplanting the former book above) that not only described the digital technology for solving the models derived for chemical processes, but also listed the computer programs required for doing so. This book was published by J. Wiley in 1972 titled, "Modeling and Simulation in Chemical Engineering", by Roger G.E. Franks

The original "DYFLO" program was a FORTRAN based system consisting of 30 routines for solving large systems of simultaneous non-linear differential/algebraic equations and simulating the dynamic behavior of common chemical process unit operations. It achieved wide usage in the seventies and eighties amongst industrial engineering professionals and senior/graduate students in universities throughout the world.

During the ensuing period, as the DYFLO program was applied to a large variety of industrial and academic problems. The most important improvement was the adoption of implicit integration for the solution of differential equations. Routines for the simulation of additional chemical unit operations were added as well as useful plotting/printing functions. The DYFLO program library expanded to 100 routines and renamed "DYFLO2".

Flowsheet Setup Screen

The Flowsheet Setup shows a replication of the process. To see the entire sheet, you will need to print the sheet or copy the sheet into Microsoft Excel.

To print, click the “Print Flow Sheet” button. When your printer menu appears, click on the “Properties” button. Change the orientation features to “Landscape”. Click OK. The Flow Sheet will print onto one page.

If you click “Cancel”, the flow sheet is provided on screen. Scroll bars at the right and on the bottom are utilized to view the entire flow sheet area.

To copy, select from the Flow Sheet screen, Window Menu and select, “Copy”. In the Widows Start Button on the Microsoft Task Bar, go to Start, select Programs, and open Microsoft Excel. Click inside the desired cell and paste.

To close the Flow Sheet window, select the File Menu and select Close, or click the lower of the Close or Exit icon S.

DYFLO Setup Screen

Intermediate Results - The Intermediate Results shows what is going on. Any error messages appear in yellow. Scroll down thru this menu box to give all condition of errors or warnings (with times) of the process, specifically for the compressor.

Simulation Results - The Simulation Results shows compressor thrust results at various times. All error and warning messages are shown. The norm range should be within -100 and 100.

PLEASE NOTE: Contact QMC regarding concerns for values outside this range.

Physical Properties Screen

The Physical Properties Tab gives the vapor pressure and enthalpy constants.

Component Plots Screen

The Component Plots Tab gives concentrations of different components on various process streams.

Pick components.

Select water (H₂O) and view new compositions.

ChartFX information follows the Tab reference pages.

Mass & Energy Balance Screen

The Mass & Energy Balance Tab is used to view compositions or the stream conditions and properties at various times.

Mass & Energy Plots Screen

The Mass & Energy Plots Tab is used to view various stream flows and conditions throughout the process. Select what to plot in the box located in the top right of the screen. This example selection shows Mole Flows. Change selection to Temperature.

PLEASE NOTE: The standard engineering units are used. Time is in minutes.

Quantities and Units
Mole Flows	lbmoles/min
Temperatures	°F
Enthalpys	btu/min
Pressures	psia
Pressure Drops	psi
Mole Weights	lb/lbsmole
Mass Flows	lbs/min
Act Vol Flows	cuft/min
Std Vol Flows	cuft/min @ 32 °F and 1 atm
* Compositions are in mole fractions

Spreadsheet Screen

The Spreadsheet Tab gives a spreadsheet listing of the data including all compositions and flow conditions versus time.

Example 1

For Example 1, select columns XT and XU by holding down the Control key on your keyboard and selecting each column. Both columns will be highlighted.

Right click once inside the highlighted area and the following prompt will appear:

When you select Yes, a Data Run Chart shows the contents of the selected columns.

Click the Close button in the lower right hand corner of the screen.

Example 2

For Example 2, select a range of cells from B1 to G12. Copy the range of cells using CTRL+C. (Press the CTRL key on the keyboard, hold down and, at the same time, press the C key on the keyboard, to copy.)

Open Microsoft Excel from the Windows Start Button at the Microsoft Taskbar on the bottom of the screen. After Excel opens, click once in any cell and Paste the range of cells using CTRL+V. (Press the CTRL key on the keyboard, hold down and, at the same time, press the V key on the keyboard, to paste.)

PLEASE NOTE:

For any changes of flow sheet values,

please contact qmc.