Biomass
Biomass is a sustainable fuel that can offer a massive reduction in carbon emissions compared with fossil fuels.
Biomass is a sustainable fuel that can offer a massive reduction in carbon emissions compared with fossil fuels.
Virgin wood from forestry, arboricultural activities, or wood processing.
Specialist high energy agricultural crops such as miscanthus and willow.
Agricultural residues such as rape straw.
Industrial and domestic waste, particularly recycled wood.
TRECO sell a range of boilers that can utilise all sources. However, virgin wood in the form of pellets, chips or logs is the most common.
Wood pellets are made from dry sawdust compressed under high pressure and extruded through a die.
They come in a range of sizes: 6 or 8 mm is typical, while for larger systems 10 or 12 mm are common.
Wood pellets should be dry, clean, mechanically robust and have an ash content defined by the appropriate standard (see below) to which they have been made, which may also define other contaminants such as chlorine content.
They should also flow freely and can be delivered via a pneumatic system
Wood chips are typically 20-50 mm, though larger chips and chunks can be 100 mm or more. They have a bulk energy density of about 50% that of solid wood.
Wood chips for energy applications should meet an appropriate quality standard if they are to be used reliably in combustion equipment, especially small scale and domestic equipment.
Physical parameters, such as maximum size and absence of slivers or fines (sawdust), and maximum moisture content are important to allow reliable operation and prevent feed blockages.
Logs for use in log burners need to be around 150-500 mm long (for many domestic users 250-300 mm is the optimum) and split if greater than 100 mm diameter.
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