Pellet store
Requirements for pellet store
35
Determining usable storage volume
Due to the 40° inclined floor required in the store, room
widths greater than 3 m offer little or no additional
useful volume for rooms of normal height.
The table below can be used to determine the useful
cross section of a store in m² under the following
conditions:
•
40° inclined floor
•
Free space above 0.40 m
•
Free space for conveyor screw 0.13 m
Tab. 14-1: Useful cross section of store in m²
With the useful cross section of the store, its volume
and the amount of pellets can be calculated:
•
Store volume (in m³) = useful cross section x room
length
•
Amount (in tons) = store volume (m³) x 0.65
14.2
Requirements for pellet store
Structural requirements
The pellet store's walls must withstand the load caused
by the weight of the pellets (bulk weight 650 kg/m³).
The plasterwork should be durable enough that it
cannot rub or flake off and contaminate the pellets.
If the forces from the tilted floor construction are
directed into the floor and not the wall, then the
following wall thicknesses have proven effective in
practice given proper anchoring in the enclosing
masonry:
•
Concrete 100 mm thick (F90).
•
Common brick 170 mm thick and plastered on
both sides (F90).
•
Post-and-beam walls with 120 mm beams,
separation 625 mm, with wooden panelling 15-
20 mm thick on both sides.
Dry storage for pellets
Pellets are very hygroscopic; they absorb moisture
from the environment. On contact with water or moist
walls, they swell up and break apart, becoming
unusable.
The pellet store must stay dry throughout the year. The
normal humidity encountered in normal residential
construction throughout the year is not harmful to the
pellets.
If there is a danger of moist walls from time to time,
such as in older buildings, we recommend installing
rear-ventilated wood facing on the walls or storing the
pellets in a fabric silo.
Dust-tight doors to pellet store
Doors and other openings must open outward and be
furnished with a circumferential dust-tight seal.
For doors or other openings to the pellet store, wooden
boards must be mounted on the inner wall (30 mm
thick with tongue and groove) so the pellets cannot
push against the door, or so that it can be opened.
Height of store (m)
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
Width
of
store
(m)
2.0 2.10 2.50 2.90 3.30 3.70 4.10 4.50 4.90
2.2 2.22 2.66 3.10 3.54 3.98 4.42 4.86 5.30
2.4 2.32 2.80 3.28 3.76 4.24 4.72 5.20 5.68
2.6 2.40 2.92 3.44 3.96 4.48 5.00 5.52 6.04
2.8 2.47 3.03 3.59 4.15 4.71 5.27 5.83 6.39
3.0 2.52 3.12 3.72 4.32 4.92 5.52 6.12 6.72
3.2
3.20 3.84 4.48 5.12 5.76 6.40 7.04
3.4
3.93 4.61 5.29 5.97 6.65 7.33
3.6
4.73 5.45 6.17 6.89 7.61
3.8
5.60 6.36 7.12 7.88
4.0
6.52 7.32 8.12
Summary of Contents for HACK 130-200
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