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The paper considers the types of heat transfer in the furnace chamber and ash residue values influence on the heat released and received in the furnace. The influence of different grades of coal (Kamyshanskij, Taldinskij and Ekibastuzkij deposits) with ash residue value from 16.4 to 43 % on the furnace combustion heat was analyzed. The ash residue value influence on the value of the heat received in the combustion chamber, which is the boiler efficiency defining characteristic, is considered. The graphical dependence of the heat amount received in the combustion chamber on the ash residue for the different types of solid fuel is shown.

Furnace chamber heat exchange peculiarities in using different types of coal