Energy evaluation of forest residues originating from pine andeucalyptus

摘要

The entry of Spain into the European Union (EU) originated a continuous evolutionrnin the forest sector in Galicia. To face up this situation, it was necessary an urgent reorganizationrnof the forest resources aiming to obtain from them a maximum productivity. Within thernforest sector, the part including all the tasks related to wood exploitation is suffering an importantrntransformation. As a consequence of the different strategies elaborated by the EU in the fieldrnof a rational and sustainable exploitation of forest resources, Galicia, with a covered forest surfacernof 2500000 ha, is situated in a position from which can become a world power in the sectorrnof wood exploitation, mainly eucalyptus and pine species.rnThis work presents the possibility of using residues originated from forest tasks as a source ofrnenergy through the transformation of that contained in the residues into electrical and/or thermalrnenergies.rnHeat content of residues is about 7500 kJ kg-1 while moisture content is around 50 %. Thisrnmeans a gross production of about 6x1010 kW year-1, or 3,5x108 euros. The use of residues asrnan alternative energy source would help to avoid some of the problems originating from a badrnmanagement of them.rnIn this article, 3 species were studied: E. Globulus Labill., el P. Pinaster Aiton and P. Silvestris L.