Comparison of methods for determining the calorific value of fuels obtained from wooden biomass
Journal Title: Annals of WULS, Forestry and Wood Technology; Zeszyty naukowe SGGW - Year 2016, Vol 94, Issue
Abstract
Comparison of methods for determining the calorific value of fuels obtained from wooden biomass. The aim of the work was comparison of gross and net calorific values of solid biofuels and of conventional fuels, determined experimentally, with the values calculated on the basis of so-called approximation formulas, which are empirical correlations between caloric values and elemental composition of fuels. In the work the following parameters were determined: elemental composition, moisture content, ash content, gross and net calorific values. The analyses were carried out for virgin wood of birch, beech, pine and spruce, for biomass of miscanthus, rapeseed straw, cereal straw and willow, as well as for waste of urea-formaldehyde plywood and phenol-formaldehyde plywood, and for coal. Using the results of elemental analysis, for the tested materials on the basis of approximation formulas gross and net calorific values were calculated, and afterwards the results of these calculations were compared with the experimental data. On this basis, an attempt was made to classify approximation formulas by their versatility and suitability for use for certain types of combustible substances. It was observed that the results of calculation of both gross and net calorific value allow to determine these parameters only in an approximate way. It is impossible to identify a versatile approximation formula which would allow to obtain results of calculation similar to the experimental data for various biomass fuels
Authors and Affiliations
Wojciech J. Cichy, Jacek Pawłowski, Magdalena Witczak, Małgorzata Walkowiak
Keywords
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