Pressure drop in pipelines for compressible gases
Pressure drop in pipelines for compressible gases
(OP)
Does anyone have a good source (book, test, memo, etc.) or even a written formula that I can use to calculate the pressure drop from landfill gas in a pipeline to an end-user?
Many Thanks,
Ormsby
Many Thanks,
Ormsby





RE: Pressure drop in pipelines for compressible gases
The GPSA Engineering Data Book is also very good, but it is a lot more expensive.
What pressure is the landfill gas running at? Below about 5 psig you'll have a pretty hard time getting any of the equations out there to accurately reflect reality. The assumptions that went into the calcs just assume higher density than you get from way-low pressure gas. I don't have a good solution other than to take the calculated volume with a large grain of salt (and oversize your pipe a size or two).
David Simpson, PE
MuleShoe Engineering
www.muleshoe-eng.com
RE: Pressure drop in pipelines for compressible gases
?p = 1.6 x 10^8 x V^1.85 x L
-----------------------
d^5 x P
?p= pressure drop (bar)
V = free air flow (m3/s)
L = pipe length (m)
d = inside pipe diameter (mm)
P = initial pressure (bar)
Greg Akhibi
SPDC Nigeria