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Energy consumption in the production of chips and bundles from logging residues

100%

Rozanski H., Jablonski K.

Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria

2010

tom 09

nr 2

25-30

The paper presents an analysis of energy consumption values for two machine energy wood harvesting technologies. Both technologies were used to produce woody fuels from logging residues, one focused on chipping and the other on bundling logging residues. The energy analysis comprised the built-in energy in the machines used, the energy contents of the fuels used and physical loads of machine operators. The energy contained in the fuels used by the machines dominated and its share in the total consumption reached 75%. The analysis of energy consumed in different technological operations showed, that the hauling of chips and bundles (50 km) were most energy consuming, and the energy consumption value reached 100 MJ/m3. Both energy wood harvesting technologies, in which wood chips as well as bundles were produced, showed similar energy consumption values, which amounted to about 196 MJ per 1 m3 of woody fuels.

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Analysis of wood chippings fractions utilized for energy purposes

84%

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.

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 2010

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Energy consumption in the production of chips and bundles from logging residues

Analysis of wood chippings fractions utilized for energy purposes