Experimental investigation on emission and stability of dual feed biogas swirl combustor

Abstract

Biomass is a renewable energy source with the highest potential to contribute in meeting energy needs and providing a secure and sustainable energy supply. For combustion of biogas (low calorific gas), an efficient technology is needed. It should provide stable combustion with low emission of pollutants such as CO and NOx over a wide operating range. This paper presents the experimental investigation on emission and stability of a premixed dual feed biogas swirl combustor with a pilot burner. For the experimental investigation, swirlers with swirl numbers 1.13 for the main burner and 1.98 for the pilot burner were used. The tests were performed at atmospheric conditions. The effects of carbon dioxide content, nominal thermal power, and equivalence ratio were analyzed and briefly discussed.

The design strategy and testing of an efficient microgas turbine combustor for biogas fuel

“…This was also confirmed by Liu et al [28]. Despite the deterioration of the biogas ignition and flame stability region associated with the presence of CO 2 , our experimentation and those of [45] have confirmed that appropriate use of a swirl combustor can stabilize the biogas flame over a wide range of equivalence ratios. The air swirl intensity of the designed combustor was high enough to stabilize the biogas flame, promising ignition and sustainable combustion.…”