Wood pellets are made of wood chips, have cylindrical shape and a diameter of about 6 mm and a length of 10 to 30 mm. Wood pellets are produced under extremely high pressure, whereby the temperature of the wood is raised and a natural “binding composition” is created while the cylindric shape is retained after the pellet is cooled down.
The compactness of the pellet is also visible during transport where only about 0.5% of wood dust occurs. Energy efficiency is about 5 kWh/kg or 18 MJ/kg. They have a very low moisture content (below 10%) which allows very high combustion coefficient. Pellets are used in specially designed furnaces for heating of residential buildings, or in factories instead of coal.
With the latest technology and equipment, from biomass (renewable energy source), quality (certified) bio-fuel wood pellets are obtained, which are made from hard (beech) wood containing 100% beech chips.