Calculation dew of compressed air

[scdaiwei]

The dew of Compressed air usually is concerned by us.
But we only can measure the dew of atmosphere pressure air.
So how the dew of atmosphere pressure air convert to Compressed air's? Are there some graphs or tables or formulas for it?
Thank you in advance.

 

[GregLamberson]

scdaiwei

If know the dew point at atmospheric, then you can use the following:

Y = (0.0002*X^3+0.0117*X^2+0.3296*X+4.4326)/(OP *14.7*2.03603*25.4)*10^6/21.1

With X = dew point in C and OP (Operating Pressure)in bar. This will give you the moisture content in lb/MMSCF.

Greg Lamberson, BS, MBA
Consultant - Upstream Energy
Website:

http://www.oil-gas-consulting.com

 

[25362]

There are plenty of threads dealing with dew points of compressed air. To mention just a few with useful information:

thread124-110630
thread391-111512
thread124-127163

 

[scdaiwei]

Thank you.
Is there any software that can calculate the dewpoint?

 

[Mr2jz]

A simple calculator can be found at

http://www.michell.co.uk/support/downloads/

and you can do pressure change calculations with it.