Air Pressure Drop Due To Security Bars
Air Pressure Drop Due To Security Bars
(OP)
We are currently working on a military job which requires us to install security bars at every wall penetration. My boss has tasked me with finding the air pressure drop across each security bar section. Needless to say, there are a lot of wall penetrations.
The bars are 1/2 inch steel at 6 inches on center each way (horizontal and veritcal) and are welded to the frame and at the cross points.
I know that the drop for a specific section will be dependent upon the size of the duct, but could someone point me in the right direction? I pretty sure I am capable of writing a spreadsheet and/or Matlab program to simplify the calculation process once I have determines the approproate equations to use.
Mahalo in advance.
The bars are 1/2 inch steel at 6 inches on center each way (horizontal and veritcal) and are welded to the frame and at the cross points.
I know that the drop for a specific section will be dependent upon the size of the duct, but could someone point me in the right direction? I pretty sure I am capable of writing a spreadsheet and/or Matlab program to simplify the calculation process once I have determines the approproate equations to use.
Mahalo in advance.





RE: Air Pressure Drop Due To Security Bars
RE: Air Pressure Drop Due To Security Bars
RE: Air Pressure Drop Due To Security Bars
Fitting loss would then be 0.26 * Vp.
I've done several of these, loss is small. Generally, the requirement typically applies only to duct greater than 96 in2, and then only between secure and non-secure areas. Some times it is requested that at least 180* in turns are included for acoustical security, which can end up being more loss than the manbars.
RE: Air Pressure Drop Due To Security Bars