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Analysis of wood chippings fractions utilized for energy purposes

100%

Gendek A., Zychowicz W.

Annals of Warsaw University of Life Sciences - SGGW. Agriculture

2015

nr 65 Agric.Forest Eng.

The realized research was aimed at determining the water content, size and fractions of wood chippings obtained using different technologies. Average absolute water content of the tested wood chippings was between 43-90% and may serve as a basis for financial settlements between the suppliers and the power companies. The obtained fraction distribution results enable conclusion that regardless of the material type the largest fraction is the one with particles of 6-32 mm. The best quality of wood chippings are obtained from round wood and they meet the requirements of the PN-91/D-95009 norm for fuel wood chips. The chippings produced in woodland areas from forest cutting refuse do not meet the above-mentioned requirements and contain about 30% of contaminants and trees remaining in the forest cutting area after clearing with thin branches with needles. In order to achieve better composition, wood chip-pings from forest clearing waste should be mixed in appropriate proportion with wood chippings from cutting round wood.

Economic effectiveness of logging residue bundling and chipping

100%

Rozanski H., Jablonski K.

Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria

2009

tom 08

nr 2

The paper contains research results into the time consumption and costs of fuel woody biomass production, in the form of bundles and chips from logging residues. The tests were conducted in adult pine stands and machine technologies for wood harvesting and extraction were used. The share of logging residues in the total tree biomass was assessed based on measurements carried out on three experimental plots in adult pine stands. The costs calculations contained fixed and variable cost categories. The share of the woody biomass which forms logging residues in the total above-ground tree biomass was 15%. The time consumptions of the energy wood harvesting, using machine technologies, were 0.447 h/m3 for wood chips and 0.481 h/m3 for residue bundles, and the costs amounted to 53 PLN/m3 and 70 PLN/m3, respectively.

Ograniczanie wyników

1 Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria

1 Annals of Warsaw University of Life Sciences - SGGW. Agriculture

1 Gendek A.

1 Jablonski K.

1 Rozanski H.

1 Zychowicz W.

1 2015

1 2009

Wyniki wyszukiwania

Analysis of wood chippings fractions utilized for energy purposes

Economic effectiveness of logging residue bundling and chipping