SPECTRAL THERMAL RADIATION CHARACTERISTICS OF COAL ASHES AND SLAGS: INFLUENCE OF CHEMICAL COMPOSITION AND TEMPERATURE

摘要

During the combustion of pulverized coal, ash particles (formed from inorganic species) can deposit on heat-transfer surfaces, resulting in a decrease in heat transfer rates and system efficiency. In addition to the knowledge of the thermal conductivity of the deposits it is necessary to obtain information on the thermal radiation characteristics of the furnace walls to predict the influence of ash sedimentation on heat transfer.