Design of Industrial Ventilation System by Velocity Pressure Method

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

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.

INDEX

1. Hardware and System Requirements

2. Installation of Software

3. Running I V Design 1.0.0 Software

3.1Starting I V Design 1.0.0 Software

3.2Mandatory Things To Do

Details Of Various Forms

4.1Plant Information Form

4.2Design Sheet

4.3Branch Entry Loss Factors

4.4Elbow Loss Factors

4.5Velocity Pressure Correction Form

4.6Fan Total Pressure Form

4.7BHP Form

Reports

Utilities

Sample Run With an Example

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.

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.

RUNNING I V Design 1.0.0 SOFTWARE

3.1Starting 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.

3.2Mandatory 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.

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)

4.1Plant 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)

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.

4.2Design 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.

4.2.1How to input values in the Design Sheet

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.

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.

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.
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.
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.
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.

Figure -4.3C (View of Design Sheet)

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.

Pressing other buttons on the Calculation Sheet like Branch Losses, Elbow Losses, VPr, FTP, BHP forms are displayed.

4.3Branch 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)

4.4Elbow 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)

4.5Velocity 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.

Figure- 4.5C

(Window to calculate the Correction for Velocity Pressure)

4.6Fan 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)

4.7BHP 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)

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.

Figure –4.8C

(Data Report Window)

UTILITIES

A Calculator can be invoked by pressing Calc button on the Calculation Sheet to do any mathematical calculations.

Figure- 4.9C

(Calculator Window)

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.

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

Pressing OK button on the smaller window which shows the information “Record Added” , pops up another window as shown below.

A click on the Yes button displays the design sheet as shown below with plant details at the top of the sheet.

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 QvdiaL

AC9600350015

BC960710

CD20005

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.

For column “BC” since diameter (Row 5) is the known input, leave the velocity row and enter diameter in Row5, velocity is calculated automatically.

Enter the Cumulative and Governing static pressures in rows 37 and 38 respectively.

When moved out the row 39 the following window appears

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.

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.

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.