EMISSIONS REDUCTION FROM PELLET STOVESTHROUGH BURNER POT MODIFICATIONS

In this study, results of an extensive set of experiments onfive wood pellet stoves (8-11 kW nominal power) have been per-formed to verify whether carbon monoxide (CO), particulatematter (PM) and nitrogen monoxide (NO) emissions can be re-duced upon modification of burner pot geometry, depth and airinlet positions. A modification of “traditional” burner pot geom-etry brings CO emission close to zero. Also PM emissions arereduced but not as much as those of CO. It is verified that increas-ing the burner pot’s depth, PM emissions can be further reducedcompared to the less deep burner pot. Finally, since plots of in-stantaneous emissions versus O2content exhibit significant scat-tering and do not show a clear correlation, plots of mean valueof emissions, over narrow intervals of O2, versus O2are intro-duced. These plots show an optimal interval of O2content thatminimizes emissions.