Gas network design
Gas network design
(OP)
i need some good equation for calculatind the speed and the pressure drop in a gas network
i have to made a network whit 60 nodes, about 2 km
start presure 1,5 ata Q=3500 Nmc/h and at the end point of the network presure 1,2 ata and Q at last user 300Nmc/h, i tried some software but whit unsatisfied result.
i have to made a network whit 60 nodes, about 2 km
start presure 1,5 ata Q=3500 Nmc/h and at the end point of the network presure 1,2 ata and Q at last user 300Nmc/h, i tried some software but whit unsatisfied result.





RE: Gas network design
BigInch
-born in the trenches.
http://virtualpipeline.spaces.msn.com
RE: Gas network design
For links to software that can easily do this for you, have a look at:
http://www.korf.co.uk/
and
http://www.korf.co.uk/korf_links.html
RE: Gas network design
Q diameter lenght reynolds lamda P1 P2 v(speed)
where i use reynolds=2230*(Q/diameter)
P1 =1,5 ata
P2 =P1-(lamda*lenght*v*v*rho)/2*diameter
lamda it's calculated whit precision of 7 digit after zero
using coolbrok formula
so i need V(speed)
thanks
RE: Gas network design
Use the network solver to calculate those, or eliminate 2 unknowns and solve for the remaining.
3 significant figures work quite well.
V = Q/A
BigInch
-born in the trenches.
http://virtualpipeline.spaces.msn.com
RE: Gas network design
in fact i know Q=3500 Nmc/h and P1=1.5 ata
RE: Gas network design
Quick way is to convert the standard flowrate to actual flowing volume inside the pipe. To do that, get the compressibility factor z, then,
Vol_1 @ P1 & T1 = Vol_std x P1/P_atm x T1/T_std /z@P1&T1
Vol_2 @ P2 & T2 = Vol_std x P2/P_atm x T2/T_std /z@P2&T2
where z = compressibility factor
Velocity at point 1 = Vol_1/A1
Velocity at point 2 = vol_2/A2
An, the inside area of the pipe at point n.
BigInch
-born in the trenches.
http://virtualpipeline.spaces.msn.com