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In the work the calculation method to define solid fuels net calorific values of woody biomass, peat, lignite, coal and anthracite on the basis of technical analysis, including the determination of total moisture content, ash content and yield of volatile substances, was developed. The method includes determining atomic relations of hydrogen to carbon and oxygen to carbon with subsequent estimation of elemental composition of the combustible matter and raw matter of solid fuels. Three variants for calculating relations of hydrogen to carbon and oxygen to carbon were considered. For sulfur content in solid fuels combustible matter less than 2 % wt. the standard deviation of estimated solid fuels net calorific values from literature data was 3.0÷3.4 % depending on the relations of hydrogen to carbon and oxygen to carbon calculation variant. For sulfur content in solid fuels combustible matter of 2.1÷8.4 % wt. the standard deviation of estimated solid fuels net calorific values from literature data was 4.7÷5.6 %. Such way of the using the technical analysis data to determine net calorific values of solid fuels may be useful in the absence of the elemental composition and solid fuels net calorific values, as well as to control characteristics of solid fuels in boilers.

Calculation Method for Evaluation of Solid Fuels Net Calorific Values on the Basis of Technical Analysis