EVALUATION OF PARAMETERS DETERMINING PM EMISSIONS AND THEIR CHEMICAL COMPOSITION IN MODERN RESIDENTIAL BIOMASS HEATING APPLIANCES

In this paper the results of a project performed at the Austrian Bioenergy Centre and the Institute for Process Engineering, Graz University of Technology, are presented, which focused on the investigation of particulate emissions from modern residential biomass heating systems. Pellet, wood chip and logwood boilers as well as a tiled stove have been tested during test stand and field measurement campaigns. The results of the project show, that modern residential biomass combustion appliances show significantly reduced particulate emissions compared to old systems. Based on the results PM10 emission factors of 20 mg/MJ for pellet and logwood boilers, 20-30 mg/MJ for wood chip boilers and 40-55 mg/MJ for tiled stoves can be proposed. Moreover, parameters influencing PM emissions such as the chemical composition of the fuel, the burnout quality and the furnace temperature have been identified and their effect on the mass and chemical composition of PM emissions has been evaluated.