Fuel store
Requirements
65
11 Fuel store
11.1
Requirements
General requirements for wood chip storage
•
Do not step onto the fuel mound. An increased risk
of injury due to bridging and the associated risk of
collapse of the fuel mound exists.
•
Firefighting equipment must be kept visible and
unobstructed.
•
The wood chip storage must be protected against
weathering (especially rain and moisture). It must
be lockable, if possible, in order to prevent unau-
thorized access (for example: by children playing).
•
Irrespective of the discharge systems, the
maximum extensions, inclinations and filling
heights must be observed, see chapter
.
•
The country-specific building and fire protection
regulations must be observed.
Wood chip storage ventilation
For wood chip storages in Austria, a minimum
ventilation cross-section of 400 cm² to the outside
must be provided (see ÖNORM H 5170).
A protective screen at the air intake opening,
however, reduces the free cross section.
Therefore, the air inlet opening must be larger,
depending on the protection grill. For air ducts through
channels, an expert calculation is required.
This value may differ depending on the country-
specific standards. Enquire about this with your au-
thorities. If no rules exist, we recommend using the
Austrian minimum cross sections as a guide.
Maintenance opening
In the wall opening between the fuel store and the
boiler room, a maintenance opening should be
installed above the conveying system's closed trough.
It requires an opening of 215x155 mm in the wall.
Fig. 11-1: Maintenance opening
1
Storeroom cover
2
Opening in the masonry
3
Maintenance door (fire protection door EI30
required)
11.2
Dimensioning
The right solution for any storeroom
In order for a wood chip heater to be planned correctly,
the first question is: How will I fill the storeroom? For
this reason, we recommend looking at the possibility of
pre-filling the storeroom. Because filling can depend
on whether existing structures and machines are to be
used, or whether reconstruction and acquisitions are
planned. A newly erected ground-level storeroom can
be filled with a front loader or telescopic loader, and an
existing silo with a filling system. Therefore, make an
effort to find the most convenient solution for filling the
storeroom.
Once the filling method has been clarified, determine
the storeroom dimensions. In principle, this should be
dimensioned as large as possible, so that less frequent
filling is required.
