CHEMICAL ENGINEERING

FLOW OF COMPRESSIBLE FLUIDS 73

If the flow is increased by 25%,GD 1. 25 ð 0. 58 D 0 .725 kg/s

G/AD 41 .19 kg/m^2 s

and: ReD 0. 15 ð 41. 9 / 1. 45 ð 105 D 4. 3 ð 105

and, from Fig. 3.7,R/u^2 D 0. 00165
The pressure dropD 4  0. 00165  100 / 0. 15  41. 19 ^21. 723 D 4 .33 kN/m^2 (which is less
than 10 kN/m^2 )
It is therefore possible to increase the flowrate by 25%.