COMPRESSED AIR THEORY
With the cooperation and under supervision of our past president Ir. H. Ghys
Free air delivery: FAD
Capacity of compressor, expressed in free air volume at atmospheric conditions.
Volume of air delivery at the outletcoks of the compressor, in compressed air conditions.
l/s = 1000/60 m
Volume of air delivery at following ambient conditions: 0°C and 1.013 bar(a)(sea level)
General gas law
P x v / T = R = constant or P x V/T = m x R'
V: volume (m
v: specific volume (m
T : absolute temperature °K
m : mole mass (Kmol)
R : individual gas constant = 287,1 J/(Kg K)
R' : universal gas constant = 8314 (J/(Kmol K)
R = R'/m
Po x Vo/To = Pi x Vi/Ti
Po, Pi : Pressure in bar(a)
To, Ti : absolute temperature in K (K = 273 + t°C)
R = gasconstant = 287.1 J/(Kg K)
air delivery Vi at outlet conditions Vi =