Home

Welcome to OnlineConversion.com

Air press / volume
 

Air press / volume
by jcgerow on 08/24/03 at 11:31:32

Great site folks! I am setting up a bench for testing an air-turbine motor. I need : [i]"Source of clean dry, filtered air at 40 to 120deg F. Source to have a pressure range of zero to 50 psig (0 to 345kPa) and air flow up to [u]46 pounds per minute ( 20,87Kgm)."[/u]
   I am having trouble understanding the pounds per minute measurement.
                                                                   JC


Re: Air press / volume
by Robert Fogt on 08/24/03 at 22:02:44

Dry air has a density of 1.0 kilograms per cubic meter.

So, 20.87 kilograms per minute of air flow is the same as 20.87 liters per minute of air flow.

The formula I have is:

D = P / TR

D = density
P = pressure
T = temperature
R = constant

For dry air R the constant is 287 Joules/Kelvin kilogram

But I am not sure of your situation, so I'll just try and provide information and hope it is what you needed.


Re: Air press / volume
by Robert Fogt on 06/11/05 at 01:19:03

Seems I incorrectly stated the density of air. A visitor corrected me and supplied the correct results below.

The correct value is 1.2250 kg/meter[sup]3[/sup], at 1.01325 bar (1 standard atmosphere) and 288.15 K (59 F, or 518.67 R)

Additionally, the text states that 20.87 kilograms per minute of air flow is the same as 20.87 liters per minute of air flow. which is also incorrect, since 1 cubic meter is equal to 1000 liters. Thus, 20.87 kg/m flow would be 20870 lpm at standard atmospheric conditions.


Go Back | Archive Index


 

Did you find us useful?

Please consider supporting the site with a small donation.

click here for more information

 


BookMark Us

It may come in handy.

Check out our Conversion Software for Windows.

Can't find something?
Try searching.

Are you bored?
Try the Fun Stuff.

Was this site helpful?
Link to Us | Donate