30
1 Extraction nozzle
2 Injection nozzle
3 Pellets
4 Wooden support 8 x 5 cm (supplied by customer)
5 Delivery auger
6 Sloping floor supports
7 Base construction (supplied by customer)
8 Multi-ply composite or Betoplan boards (supplied by customer)
9Wall
10 Ceiling
To calculate the required bunker size:
For every kW of thermal load one needs 0.9 m
3
bunker space.
Rule of thumb:
1 kW thermal load = 0.9 m
3
total storage space (including empty
space) of that,
2
/
3
can actually be used to store pellets
Due to the sloping intermediate floor and due to the space required
for delivery of the pellets (injection and extraction nozzles), only
about
2
/
3
of the total space available can actually be used.
Example:
For a home with a thermal load of 18 kW, the following volume is
required for the bunker:
18 kW x 0.9 m
3
= 16.2 m
3
total storage space
16.2 m
3
x
2
/
3
= 10.8 m
3
of actually useable storage space for pellets.
Figure 4/2 - Pellet bunker
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