Summary:

Biomass contains chemical energy which is a transformed Sun radiation. This energy can be used in many different ways. One of these is a direct combustion which is the most popular. The direct combustion of biomass is a technology which is well proven in large-scale heat and power generation. However, the situation in the small-scale heat generation is not so good. This paper describes results from the experimental combustion with various kinds of biomass in three different combustion devices. Saw dust is used in the experiment described below. The aim is to choose the best biofuel modification and the best way for its combustion from the point of view of power and emission parameters. As for the so far reached results of the experiment, the best in case of saw dust is the combustion with gasification of saw dust briquettes on stable grate without primary air or pellets in bottom supplied burner.