Wood pellets must be stored in dry and clean conditions. Normal cellars meet most of these requirements. However, silos and Flexi tanks are also suitable storage spaces. If these tanks are situated outdoors, they must be protected from moisture and UV radiation.
IMPORTANT: The pellet tanker is equipped with a pump hose of up to 30 m in length. The storage room (and its filling coupling) should therefore be located no further than 30 metres from the driveway.
Wood pellets must be stored in rooms (cellars) or halls, which are enclosed on all sides. The best place for them to lie is on clean concrete or asphalt. Silos and Flexi tanks are also suitable storage spaces. If these tanks are situated outdoors, they must be protected from moisture and UV radiation.
The little "energy bombs" need relatively little storage space: 1 tonne requires a storage volume of approximately 1.5 m³. The following practical rule of thumb applies: 1 kW of heat load = 400 kg annual requirement = 0.9 m³ storage space.
Example: Detached house with a heat load of 10 kW = 4000 kg annual wood pellet requirement = 9 m³ storage space = 2 m x 2 m floor area with a ceiling height of 2.3 m.
When filling the pellet store, it is important that the fill connector has no right angles. Since the pellets are blown in, a sudden change in direction can break them up.
Protective mats in the store help cushion pellet impact. Since 1 October 2012, ÖNORM M 7137 applies.Here are a few key points for a correctly designed pellet storage room:
ÖNORM M 7137 also advises ventilating the pellet store adequately. This can take place via the air slots in the fill connector cover.
© ÖkoFEN 2012