Conversion of lbs/ sec to SCFM or SCFH Natural gas flow meas

Disscussing old, rare, very specific or otherwise uncommon units and measurements
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Conversion of lbs/ sec to SCFM or SCFH Natural gas flow meas

Postby jdarnett@southernco.com » Mon Jul 25, 2005 11:39 pm

How do I convert lbs/sec to SCFM or SCFH for natural gas flow measurement?
jdarnett@southernco.com
 

Postby Guest » Tue Jul 26, 2005 5:34 am

Well the seconds to minutes or hours is the easy part.

Basically, you need to know the density of the gas at the standard conditions (temperature and pressure) implied by the "S" in SCFM. While natural gas is mostly methane, it also contains ethane and traces of other things, and the composition varies some depending on the source of the gas.

If you know the composition, you can construct a composite or average molecular weight for gas just as is done for atmospheric air, then use the ideal gas equation.

For legal metering (for trade), the ideal gas law isn't exactly right and you need to consider compressibility factor.
Guest
 


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