Design of Industrial Ventilation System by Velocity Pressure Method
Draft
(Design of Industrial Ventilation System by Velocity Pressure Method)
By
Amulya Duvvuru
&
Ashok Kumar
Department Of Civil Engineering
University Of Toledo
Toledo, OH
July, 2000
Design of Industrial Ventilation System by Velocity Pressure Method
COPYRIGHT INFORMATION
This Document contains latest information on Design of Industrial Ventilation System by Velocity
Pressure Method.Copyright © 2000 by Amulya Duvvuru & Dr Ashok Kumar. All rights Reserved.
No part of the document is to be copied and given to anyone without the permission of the project
developer. First edition published in July 2000.
Design of Industrial Ventilation System by Velocity Pressure Method
INDEX
1.
Hardware and System Requirements
2.
Installation of Software
3.
Running I V Design 1.0.0 Software
4.
3.1
Starting I V Design 1.0.0 Software
3.2
Mandatory Things To Do
Details Of Various Forms
4.1
Plant Information Form
4.2
Design Sheet
4.3
Branch Entry Loss Factors
4.4
Elbow Loss Factors
4.5
Velocity Pressure Correction Form
4.6
Fan Total Pressure Form
4.7
BHP Form
5.
Reports
6.
Utilities
7.
Sample Run With an Example
Design of Industrial Ventilation System by Velocity Pressure Method
HARDWARE AND SYSTEM REQUIREMENTS
To run I V Design 1.0.0 certain Software and Hardware should be installed in the computer.
The minimum system requirements include:

Microsoft Windows 95/NT/2000.

80486 or higher Microprocessor.

A hard disk with a minimum of 100 Mega Bytes space for installation.

VGA or higher-resolution screen supported by Microsoft Windows.

16 MB of RAM.

A Mouse or other suitable pointing device.
Design of Industrial Ventilation System by Velocity Pressure Method
INSTALLATION OF SOFTWARE I V Design 1.0.0
I V Design 1.0.0 can be installed on your computer using the Setup program. The
Setup program installs the project itself, other product components from the Setup are copied
to the folder on the disk.
Important: You cannot simply copy files from the folder to your hard disk and run
IVDesign 1.0.0 . You must use the Setup program that decompresses and installs the files in
appropriate directories.
Instructions for installing I V Design 1.0.0
Double Click on Setup.exe file located in VPM Setup folder and follow the Instructions.
Design of Industrial Ventilation System by Velocity Pressure Method
RUNNING I V Design 1.0.0 SOFTWARE
3.1
Starting I V Design 1.0.0 Software
After completing the Setup Procedure, start I V Design 1.0.0 using Start button on the
taskbar in Windows 95/NT/2000.
Starting I V Design 1.0.0 from Windows

1. Click Start on the task bar
2. Select Programs, and then VPM
-
Or
-
1. Click Start on the task bar.
2. Select programs.
3. Use Windows Explorer to find the VPM executable file (VPM.EXE).

Double-click the icon.

You can also create a shortcut to VPM, and Double-click the shortcut.
3.2
Mandatory Things To Do
Things to be done after installing I V Design 1.0.0
1. Add plant details in the Plant Form.
2. Press Save button inorder to save the store the sheet in the database.
3. Please don’t use ENTER key. Use arrow keys to move the cursor.
Design of Industrial Ventilation System by Velocity Pressure Method
DETAILS OF VARIOUS FORMS
This is the first screen that appears when the software is run. It lasts only for a few seconds
and the design sheet follows this screen.
Figure- 4.1 C (Welcome Screen)
4.1
Plant Information Form
Once the design sheet opens up the first thing to do is click on “Plant Form” button which
displays the following window.
Figure- 4.2 C (Plant Information Form)
Design of Industrial Ventilation System by Velocity Pressure Method
Add Button:
1. Click on Add button to add details like Plant Name, Location, Department, Elevation,
Temperature, Factor, Drawing No., and the Designer Name.
2. A Click on Ok button saves the plant details.
3. A click on Cancel button doesn’t save the record.
Modify Button:
To change the plant details, click on Modify button and choose the respective field to be
changed. Click on Ok button to save changes and Cancel to Abort.
View Button:
Click on View button to view the plant details.
Exit Button:
Exit button closes the application.
Design of Industrial Ventilation System by Velocity Pressure Method
4.2
Design Sheet
The Plant Details are shown on the design sheet as soon as the plant form
is filled. Date is taken as the system date.
4.2.1 How to input values in the Design Sheet
1. Calculations in the design sheet are column wise and each column represents a part of the
industrial ventilation system like duct, collector etc
2. Rows 1,2,3,5,10,11,13,14,17,18,21,23,26,27,29,30,32,36,37,38,42 are input rows and
if no input is to be entered in a particular cell, enter zero. No cell must be left without any
value.
3. The rest of the rows are calculated rows and the formulae are displayed in the text box at
the top of the design sheet for each calculated cell. All the Formulae fields are colored
Yellow.
4. For Row 2 that is the input row for volumetric flowrate after column 3 with each mouse
click a combo box is seen with two options as “input” and “formula”. Selection of
“input” allows the user to enter a numeric value. In case there is a correction at a junction
point in the ventilation system select “formula” and the next two mouse clicks must be
on the cells whose values must be added to get the flowrate.
5. The first click changes the color of the cell to black , the next two mouse clicks changes
the color of the cells to red. The third click must be on the black colored cell to get the
sum of the two values. There is an option to deselect the cells that are chosen to add up
(red colored cells) one more click on the red color cell displays a message box “ Do You
Want to Deselect”. Press Yes to deselect or No to quit the message box.
Design of Industrial Ventilation System by Velocity Pressure Method
6. For Rows 3 and 5. If ‘velocity’ is the known input, enter it in the third row, the diameter
is calculated based on the input velocity. If velocity is not known and diameter is the
known input, enter it in the fifth row, velocity is calculated based on input diameter.
7. Input for rows 14,18 and 29 must be either 0 or 1. In case a different a value is entered an
error message box “ Enter Value 0 or 1 “ is displayed.
8. For Row 39 a message box pops up requesting if the correction is needed for that column
(duct). On pressing “yes” rows 39, 40, 41 are calculated automatically. If no zeros
are displayed in these rows for that particular column.
This is the design sheet window that is displayed after filling out the plant details.
Button to View
bhp Form
Figure -4.3C (View of Design Sheet)
Design of Industrial Ventilation System by Velocity Pressure Method
Save Button:
To save the design sheet into the database press Save button. Once the design sheet is saved
changes can’t be made to it.
View Button:
To view a previously saved design sheet press View button. Pressing the view button
generates a combo box with a list of plant names previously saved. A plant name must be
chosen from the list in order to view the design sheet of that particular plant.
Delete Button:
To delete any form saved previously, press View button, select the plant name from the list
displayed, press Delete button. A message to confirm the deletion is displayed.
Refresh Button:
Pressing the refresh button erases all the elements in the design sheet (flex grid).
Print Button:
A Click on Print button generates a report of the design sheet. The report can be saved or
can be routed to a printer to take a hard copy of it with the help of icons provided at the top
left corner of the report.
Cancel Button:
This button Aborts the any operation.
Exit Button:
A click on this button closes the application.
Design of Industrial Ventilation System by Velocity Pressure Method
Pressing other buttons on the Calculation Sheet like Branch Losses, Elbow Losses, VPr, FTP,
BHP forms are displayed.
4.3
Branch Entry Loss Factors
To select the Branch Entry Loss Factors, click the button for “Branch losses”. The
window as shown below with a list of factors is displayed. A factor selected is displayed in
the text box adjacent to Branch Losses label in the design sheet.
Figure- 4.4C
(Window for Branch Entry Loss Factors)
Design of Industrial Ventilation System by Velocity Pressure Method
4.4
Elbow Loss Factors
To select the Elbow Loss Factors, click the button for “Elbow losses”. The window as
shown below with a list of factors is displayed. A factor selected is displayed in the text box
adjacent to Elbow Losses label in the design sheet.
Figure- 4.4C
(Window for Elbow Loss Factors)
4.5
Velocity Pressure Correction Form
To calculate the correction for Velocity Pressure at the junction point in the Industrial
Ventilation System, Press the button adjacent to “VPr” label in the design sheet. The
following window is displayed. Two command buttons to calculate and to Exit from window
are placed. Once the Exit button is pressed the result is displayed in the text box adjacent to
VPr label. If any other data is input other than numbers in this form an error message “ Enter
Numerics Only “ is displayed.
Design of Industrial Ventilation System by Velocity Pressure Method
Figure- 4.5C
(Window to calculate the Correction for Velocity Pressure)
4.6
Fan Total Pressure Form
To calculate the Fan Total Pressure of the Ventilation System, Press the button
adjacent to “FTP” label in the design sheet. The following window is displayed. Two
command buttons to calculate and to Exit the window are placed. Once the Exit button is
pressed the result is displayed in the text box adjacent to FTP label.
Figure- 4.6C
(Window to calculate Fan Total Pressure)
Design of Industrial Ventilation System by Velocity Pressure Method
4.7
BHP Form
To calculate the BHP of the Ventilation System, Press the button adjacent to “bhp”
label in the design sheet. The following window is displayed. Two command buttons to
calculate and to Exit the window are placed. Once the Exit button is pressed the result is
displayed in the text box adjacent to bhp label.
Figure- 4.7C
(Window to calculate bhp)
.
Design of Industrial Ventilation System by Velocity Pressure Method
REPORTS
A click on the Print button generates a Data Report of that particular design sheet. The report
can be saved or can be routed to a printer to take a hard copy of it with the help of icons
provided at the top left corner of the report.
Print
button
Save
button
Figure –4.8C
(Data Report Window)
Design of Industrial Ventilation System by Velocity Pressure Method
UTILITIES
A Calculator can be invoked by pressing Calc button on the Calculation Sheet to do any
mathematical calculations.
Figure- 4.9C
(Calculator Window)
Design of Industrial Ventilation System by Velocity Pressure Method
SAMPLE RUN OF THE SOFTWARE
Step1:
After installing the software, run it. The fist screen that appears is the welcome screen
and lasts only for a few seconds. A design sheet window follows this.
1.Click on Plant
Form button
2. Click Add

Click on Plant Form, the window as shown above is displayed.

Click on Add, and enter the plant details. Press OK button, the window as shown
below appears on the design sheet
1. First Press this OK
button to display
small screen
Small
screen
2. Next press
this OK button
Design of Industrial Ventilation System by Velocity Pressure Method

Pressing OK button on the smaller window which shows the information “Record
Added” , pops up another window as shown below.
Click here to
view design
sheet

Plant
Details
A click on the Yes button displays the design sheet as shown below with plant
details at the top of the sheet.
Plant
Details
Design of Industrial Ventilation System by Velocity Pressure Method
Step 2:
Start giving inputs. All the yellow colored rows (horizontal) are formula fields and
the software doesn’t allow you to enter any value in these rows. Input must be given column
wise (vertically)and must be given only in the white colored rows.

Use Only ARROW keys and never use ENTER Key.

Use BACKSPACE to delete the input value.

Data
Q
v
AC
9600
3500
BC
960
CD
dia
15
7
2000
L
10
5
Input is 2.00 instead
of 1 or 0. So the error
message box

Enter “AC” in Row1, use down-arrow key to move to the next row, then enter “9600” in
Row2. AS you move downwards rows 4-8 are calculated automatically.

Give all the known input values in that column and stop at Row 37. Don’t leave any cell
empty, if no input exists enter zero.
Design of Industrial Ventilation System by Velocity Pressure Method

For column “BC” since diameter (Row 5) is the known input, leave the velocity row and
enter diameter in Row5, velocity is calculated automatically.
Leave this row
empty if dia is
the known input
Enter dia here

Enter the Cumulative and Governing static pressures in rows 37 and 38 respectively.
When moved out the row 39 the following window appears
Design of Industrial Ventilation System by Velocity Pressure Method

Click on Yes if correction for volumetric Flowrate is required, else click No

The following calculations are done on pressing Yes.

From third column onwards for Row2 and combo box is displayed with the mouse click
as shown below. Use mouse and click in the cell.
Combo Box

Select Input if Flowrate is known as the input. If there is any correction to be
performed select Formula. If formula is selected the color of the cell turns black and
the next two mouse clicks must be on the cells to be added. The next two mouse
clicks turns cells to red color.
Design of Industrial Ventilation System by Velocity Pressure Method
This is the cell
where combo box
was displayed
Next mouse
click

The third click must be on the black colored cell to display the result.

The rest of the inputs are given the same way.

To save the design sheet press Save button. The following message box is displayed
on the design sheet.

To take a hard copy of the report . Click on View, select the plant name and press Print.
A report is generated and press the icon on the top left corner to route the report to a
printer.