New Machine Increases Utilisation of Wood for Fuel
Wood can be used as an energy source to produce electricity or heat, or both of these simultaneously. Wood is a low-pollution source of energy
containing 50.7% carbon, 41.7% oxygen, 6.4% hydrogen, 0.8% ash and 0.4% nitrogen.
Wood is a regenerating natural resource in the evergreen forest zone. However, currently only about half of each tree is used. This is
because a mechanical means of collecting smaller branches and needles has not existed.
Now, however, such a machine is being developed and patented in Finland. The new machine will allow everything but the tree stump to be
used in open logging by chipping the tree top, branches and needles, as well as sawing poles and pulp from the log tree. A hectare of spruce forest logged in this way produces biomass equal to 22 tonnes of oil. For pine forest, the
yield is 10 tonnes oil equivalent.
In addition the machinery is sufficiently manoeuvrable to be used for primary thinning of forest.
For more information contact the CADDET Finnish National Team in Helsinki.