Drive, Pipe Screw Conveyor, Standard; Drive, Pipe Screw Conveyor, High-Power; Fuel Storage In On-Site Pellet Store (Sizing); Sizing The Pellet Storage Room - Viessmann KOB PYROTEC Technical Manual

Design information

Drive, pipe screw conveyor, standard

Part no. 7387 843
Standard version for pipe screw conveyor with pulling drive and dis-
charge into a drop section. The system is driven via a spur geared
motor and chain in a dust-proof chain guard. For MR 150 and exclu-
sively with pellets, it is also possible as a pushing version.
Trade name
Type
Part no:
Diameter of the screw conveyor max.
Torque at screw conveyor
Function
Length of the screw conveyor max.
Boiler output max. when using:
Pellets
Woodchips from forest thinnings

Drive, pipe screw conveyor, high-power

Part no. 7387 963
Special, powerful version of the pipe screw conveyor for more difficult
applications (high pump rate and/or pushing function). The system is
driven via a more powerful version of a spur geared motor, bearing
and chain in a dust-proof chain guard.
Trade name
Type
Part no:
Diameter of the screw conveyor max.
Torque at screw conveyor
Function
Length of the screw conveyor max.
Boiler output max. when using:
Woodchips from forest thinnings

6.17 Fuel storage in on-site pellet store (sizing)

Sizing the pellet storage room

6
The storage room should be more rectangular than square and should
be of a size which allows an annual quantity of fuel to be stored. The
size of the storage room depends on the heating load of the building.
The floor area should, however, not be less than 2 x 3 m.
The required size of the storage room for the annual fuel volume in
3
m (incl. empty space) is calculated by multiplying the building heating
load (in kW) by a factor of 0.9 (m
Example:
Heating load of the building 150 kW
66
(cont.)
mm
Nm
m
kW
kW
mm
Nm
m
kW
3 /kW).
Standard delivery:
■ Drive unit with spur geared motor 3 x 400 V and chain drive
■ Inlet with light barrier for monitoring the fill level (overfill protection)
■ Discharge with inspection cover, safety limit switch and downpipe/
adaptor for the following conveyor device (not required in pushing
version)
Drive, pipe screw conveyor, standard
MR-12
7387 843
150
~800
Pulling Pushing
10
200
300
Standard delivery:
■ Drive unit in powerful version and additional axial bearing with push-
ing function with spur geared motor 3 x 400 V and chain drive
■ Inlet with light barrier for monitoring the fill level
■ Discharge with inspection cover, safety limit switch and downpipe/
adaptor for the following conveyor device (not required in pushing
version)
Drive, pipe screw conveyor, high-power
MR-13
7387 963
190
~1100
Pulling Pushing
10
1500
3 3
150 kW x 0.9 (m /kW) = 135 m
Available space (storage room less unusable area due to sloping
3 3
floors) = 135 m x 2/3 +135 m = 225 m
Amount of pellets = 225 m 3
x 650 kg/m
= 146250 kg/m 3
Storage room size = 135 m 3 / 2.3 m (room height)
= 59 m 2 floor area
In order to store the annual fuel quantity, a room size of 7 m x 8.5 m
is sufficient.
Stored amount of energy = 58500 kg x 5 kWh/kg = 292 500 kWh
150 190
~800 ~800
Pulling
8 10
1200 3200
- 1250
250 250
~1100 ~1100
Pulling
8 10
2500 2500
3
3
≈ 147 t
PYROTEC