Porównanie ciepła spalania i wartości opałowej szyszek wybranych gatunków drzew leśnych

Comparison of heat of combustion and calorific value of the cones and wood of selected forest tree species


  • Monika Aniszewska Szkoła Główna Gospodarstwa Wiejskiego, Wydział Leśny, Katedra Maszyn Rolniczych i Leśnych
    ul. Nowoursynowska 164
    02-787 Warszawa, Polska
    Tel. +48 22 5934520, e-mail: monika_aniszewska@sggw.pl
  • Arkadiusz Gendek Szkoła Główna Gospodarstwa Wiejskiego w Warszawie, Wydział Inżynierii Produkcji, Katedra Maszyn Rolniczych i Leśnych, ul. Nowoursynowska 164, 02-776 Warszawa


Every year, scaling plants buy (up to tens of tons) cones which needs to be peeled. After the process of scaling, the cones themselves are waste, which is partly sold. The problem of waste disposal is especially severe in plants where the processing is performed by electrically-powered scaling cabinets, but the problem does not apply to facilities where pellets are burned to produce heat.
We examined the heat of combustion and calorific value of the residues from scaling plants that can be used in the production of refined wood fuels. The residues consist of the empty cones of pine, spruce, larch as well as husks and stems of silver fir. Additionally, we conducted measurements of the heat of combustion for wood and cones of each species and compared them to their respective calorific values
The results revealed that the average calorific value of the cones is in the range 17.81–19.86 MJ/kg. Our work showed that empty cones have a significantly higher calorific value and heat of combustion than the wood of spruce, larch and fir. In the case of pine, cones and wood did not differ significantly.
These results led us to the conclusions that empty de-scaled cones can be utilized as a valuable primary solid fuel or fuel additive for the production of refined products for the local market.
Due to the low annual production of cones in comparison to other materials such as sawdust and wood chips, pine cones should be used as a supplement, to enrich fuels of inferior quality by enhancing their energetic properties.

DOI 10.2478/frp-2014-0022
Source Leśne Prace Badawcze, 2014, 75 (3): 221–236.
Print ISSN 1732-9442
Online ISSN
Type of article
Original article
Original title
Porównanie ciepła spalania i wartości opałowej szyszek wybranych gatunków drzew leśnych
Publisher Instytut Badawczy Leśnictwa, Sękocin Stary, Poland
Date 2014, September

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