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New Forestry Mechanisation : Journal for theory and application of forestry engineering, Vol. 35 No. 1, 2014.

Original scientific paper

Analysis of Energy Value of Some Tree Species

Ljupčo Nestorovski ; Ss. Cyril and Methodius University in Skopje Faculty of forestry, Skopje MACEDONIA
Mitko Nacevski ; Ss. Cyril and Methodius University in Skopje Faculty of Design and Technologies of Furniture and Interior, Skopje MACEDONIA
Zdravko Trajanov ; Ss. Cyril and Methodius University in Skopje Faculty of forestry, Skopje MACEDONIA
Pande Trajkov ; Ss. Cyril and Methodius University in Skopje Faculty of forestry, Skopje MACEDONIA

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Abstract

This paper presents the investigation of five (5) characteristic forestry species (Fagus ×moe­siaca (K. Malý) Czeczott, Quercus petreaea (Matt.) Liebl., Quercus pubescens Willd., Carpinus orientalis Mill., Pinus nigra J. F. Arnold) that cover the major part of the total forest area, and account for around 70% of the total forest reserve in the Republic of Macedonia. These forestry species are also very common in other regional forests.
The purpose of this investigation is to establish the energy value of these species at different trunk height and different parts of the tree (wood, bark) in order to determine the differences due to different cell structure. The material for this investigation was collected in different regions of the Republic of Macedonia, and for each investigated species the material was collected at two different locations with different ecological conditions. Wood density parameters of tree species were also established for local conditions, and combined with the available sources from other countries. The article presents a harmonized approach to estimate the potential for energy production by different species, eliminating different ecological growing conditions.
The results of the investigation show that the conifers have higher energy value than broadleaved species, and that this difference is significant. There were no significant differences in the energy potential between different parts of the tree (1.3 and 5.3 m, branches), except for the bark. The energy potential of the selected species is significant, and with certain technological changes in the phase of forest utilization and in the process of transformation of wood into other kinds of energy (heat, electric, etc.), it is a significant basis for the improvement of the energy balance of the Republic of Macedonia,
along with the use of the alternative, renewable and environmentally
friendly energy.

Keywords

biomass; calorific value; alternative energy

Hrčak ID:

121861

URI

https://hrcak.srce.hr/121861

Publication date:

1.4.2014.

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