Wood pellets are made of sawdust produced as a waste product from sawmills. As suggested by the name, when sawdust is compressed it produces a pellet shape with a shiny finish, due to the natural glues found in sawdust.
In order to work in the Lindner & Sommerauer your pellets need to:
- Be accredited to the ENPlus A1 or A2 Standard
- Be 5-40mm long
- Be 5-6mm in diameter
- Have a water content of 8-10%
- Have an ash content of 0.5%.
Provided you acquire the correct pellets they will have a bulk weight of around 650kg/m3 and will produce 4.9kWh of heat per kilogram.
We may have mentioned this before but… we can’t stress enough how important the quality is. Only use HETAS/WOODSure suppliers. To be sure of quality use the Biomass Suppliers List (BSL) to track down trusted suppliers all over the UK Concentrating on finding the best supplier is a great way to ensure you have a happy, healthy boiler.
Your pellets need to be kept in a specifically built store with convenient access for delivery and an inspection hatch for weekly checks. Pellets are usually ‘blown’ in through an external filler tube by a tanker.
Check out the table below to see how you can expect wood pellets to perform, compared to other biofuels:
|Fuel||kg/m3||g CO2/kWh||kWh/ Kg|
|Source: Biomass Energy Centre|