Hello,
My computer is having issues with the online calculator. Need simple max. volume calculations for natural gas flow in Mcf per day for following scenarios (gas analysis attached):
Pipe: HDPE SDR-11 gas line
ID: 2.825 in.
Length: 10,000 ft.
Elev: 700 ft.
Scenario #1 (w/o compression)
Max. Inlet: 50 psig
Min. Discharge: 5 psig
Scenario #2 (with compression)
Max. Inlet: 150psig
Min. Discharge: 5 psig
Much appreciated,
Randy
P.S. Great resource for quick calculations in the field (thanks!)
http://www.kentuckynaturalgas.com
Maximum gas flow calculation
Maximum gas flow calculation
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Re: Maximum gas flow calculation
Here is report for your scenario 1:
Compressible natural gas flow calculator
1. volumetric flow rate (q):
q : 460.8046 ft3/min
3. length (L):
L : 10000 ft
4. diameter (D):
D : 2.825 in
5. density (ρ):
ρ : 0.78 kg/m3
6. temperature (T):
T : 288 K
9. pressure on the pipe start (p1):
p1 : 64.695432 psi
10. pressure on the pipe end (p2):
p2 : 19.695436 psi
11. pressure drop (p1-p2):
p1-p2 : 45 psi
12. velocity at the start (V1):
V1 : 12.879997 m/s
13. velocity at the end (V2):
V2 : 42.30813 m/s
And for scenario 2:
1. volumetric flow rate (q):
q : 1346.5756 ft3/min
2. mass flow rate (w):
w : 1784.5172 kg/h
3. length (L):
L : 10000 ft
4. diameter (D):
D : 2.825 in
5. density (ρ):
ρ : 0.78 kg/m3
6. temperature (T):
T : 288 K
9. pressure on the pipe start (p1):
p1 : 164.695432 psi
10. pressure on the pipe end (p2):
p2 : 19.69543 psi
11. pressure drop (p1-p2):
p1-p2 : 145 psi
12. velocity at the start (V1):
V1 : 14.785015 m/s
13. velocity at the end (V2):
V2 : 123.63397 m/s
Note that pressures are absolute values
Compressible natural gas flow calculator
1. volumetric flow rate (q):
q : 460.8046 ft3/min
3. length (L):
L : 10000 ft
4. diameter (D):
D : 2.825 in
5. density (ρ):
ρ : 0.78 kg/m3
6. temperature (T):
T : 288 K
9. pressure on the pipe start (p1):
p1 : 64.695432 psi
10. pressure on the pipe end (p2):
p2 : 19.695436 psi
11. pressure drop (p1-p2):
p1-p2 : 45 psi
12. velocity at the start (V1):
V1 : 12.879997 m/s
13. velocity at the end (V2):
V2 : 42.30813 m/s
And for scenario 2:
1. volumetric flow rate (q):
q : 1346.5756 ft3/min
2. mass flow rate (w):
w : 1784.5172 kg/h
3. length (L):
L : 10000 ft
4. diameter (D):
D : 2.825 in
5. density (ρ):
ρ : 0.78 kg/m3
6. temperature (T):
T : 288 K
9. pressure on the pipe start (p1):
p1 : 164.695432 psi
10. pressure on the pipe end (p2):
p2 : 19.69543 psi
11. pressure drop (p1-p2):
p1-p2 : 145 psi
12. velocity at the start (V1):
V1 : 14.785015 m/s
13. velocity at the end (V2):
V2 : 123.63397 m/s
Note that pressures are absolute values
Pipe flow calculations - free fluid flow calculators
Re: Maximum gas flow calculation
Dear All,
Last edited by rex on Thu Mar 01, 2012 12:17 am, edited 1 time in total.
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- Posts: 57
- Joined: Sat Sep 17, 2011 8:50 am
Re: Maximum gas flow calculation
Pipe size can be calculate if:
You know flow velocity or
You know pressure drop through pipe.
Also you should know fluid density. I expect that fuel gas is 0.78 m3/kg at normal conditions and lube oil is 850 kg/m3, but you have to confirm.
You can use flow rate and pipe diameter calculator for your calculation, but for gas enter density at pressure and temperature at real conditions.
If you do not know velocity, recommended values are for gas up to 20 m/s and for oil 1 m/s, but it depends on available pressure.
You know flow velocity or
You know pressure drop through pipe.
Also you should know fluid density. I expect that fuel gas is 0.78 m3/kg at normal conditions and lube oil is 850 kg/m3, but you have to confirm.
You can use flow rate and pipe diameter calculator for your calculation, but for gas enter density at pressure and temperature at real conditions.
If you do not know velocity, recommended values are for gas up to 20 m/s and for oil 1 m/s, but it depends on available pressure.
Pipe flow calculations - free fluid flow calculators
Re: Maximum gas flow calculation
Thank you for the additional information and clarification ~ much appreciated!