Pressure drop in a compressed air system (assignement)
Posted: Thu Sep 19, 2019 7:55 am
Good day all, i need help to solve some points of this exercice!
The candiate has to size the loop ring pipe and primary air receiver AS1 in a compressed air system given that
• Standard conditions
• Compression ratio 7
• Max pressure drop in the loop 0.1 bar
The first part has been solved
My problem come after calculating the pressure drop using the following formula
dP= 1,6*10^8*[(L*Qc^1,85)/(P*d^5)]
where:
Dp = pressure drop (bar)
QC = Air demand (m3/s of free air)
L = length (m)
d = internal diameter (mm)
p = pressure (bar) (abs)
the compression ratio is 7 so In my case P=7 bar
This table displays the results of the professor
I can’t find the same value of the pressure drop in branch 1 and 3 (colored in yellow)
Any help would be highly appreciated!
The candiate has to size the loop ring pipe and primary air receiver AS1 in a compressed air system given that
• Standard conditions
• Compression ratio 7
• Max pressure drop in the loop 0.1 bar
The first part has been solved
My problem come after calculating the pressure drop using the following formula
dP= 1,6*10^8*[(L*Qc^1,85)/(P*d^5)]
where:
Dp = pressure drop (bar)
QC = Air demand (m3/s of free air)
L = length (m)
d = internal diameter (mm)
p = pressure (bar) (abs)
the compression ratio is 7 so In my case P=7 bar
- fad.png (34.86 KiB) Viewed 72157 times
I can’t find the same value of the pressure drop in branch 1 and 3 (colored in yellow)
Any help would be highly appreciated!