Wednesday, July 23, 2014

Wobbe index in PRO/II

The Wobbe Index is a measure of caloric value and has the same units as GHV (energy / time).  The formula for the calculation is:

Wobbe Index = GHV / SQRT(SPGR) / Zavg

where, GHV is the ideal GHV of the stream, SPGR is the specific gravity with respect to air, and Zavg is the average compressibility at standard temperature and pressure.