You won't be far off assuming that the exhaust gas is just hot air and using the thermodynamic properties of air. You can even use ideal gas properties and still get a pretty good approximation. Assume that pressure is atmospheric. Marc de Piolenc "Marsh Bros." wrote: > > Dear list: > > Here is the tech question of the day. How do I determine the amount of > energy in the exhaust gases given off by my generator set? - Gasification List Archives: http://www.crest.org/discussion/gasification/current/ Gasification List Moderator: Tom Reed, Biomass Energy Foundation, Reedtb2@cs.com www.webpan.com/BEF Sponsor the Gasification List: http://www.crest.org/discuss3.html - Other Gasification Events and Information: http://www.fsec.ucf.edu/bioam/ http://solstice.crest.org/renewables/biomass-info/gasref.shtml http://solstice.crest.org/renewables/biomass-info/