How Is A Stove Made; Combustion - Ravelli o-ring User Manual

how is a stove made?

1
2
3
4
5
6
6
1 7
Pellet tank cover Air intake duct with
2
Design coating flow meter
3 8
Pellet tank Hot air output grid
4 9
Pelelt infeed screw Vermiculite
5 10
Smoke extractor Front door
6 11
Pellet gear motor Ignition resistance

combustion

Combustion is nothing more than a chemical reaction in which two agents,
called the fuel and the oxidizing agent, combine to produce a new substance.
A considerable amount of heat is also produced from this reaction (concept of
pellet stove functioning).
To facilitate the aforementioned expression, we can take into consideration this
practical diagram called the "combustion triangle"; it consists of three elements
which are necessary to produce a combustion reaction. These three elements
are:
fuel
8
oxidizing agent
trigger
The fuel and the oxidizing agent must be in adequate proportions because com-
bustion is restricted to the so-called "inflammability field".
9
The reaction between the fuel and the oxidizing agent is not spontaneous, but
occurs using an external trigger.
10
The trigger can be represented for example by a heat source or a spark. The
trigger represents the ignition energy necessary for the reagent molecules to
11
start the reaction and must be provided externally (electrical resistor on switch
on). Then, the energy released by the reaction makes self-sustainment possible.
Three types of combustion are reported below, the correct one is reported in
12
Figure 3:
13
14
12
Cast iron brazier
13
contact the Technical Support Centre.
Fume duct
14
Stove base
INCORRECT
tity of pellets not burning on the grate. Firstly, check the door is closed and the
ash pan. Secondly, correct the pellet/air set by increasing the percentage of air
8
(pellets)
(oxygen in air)
(electrical resistor on switch on).
INCORRECT combustion, flame too drawn, in "blow-
torch" style with a high quality of incandescent pellets
coming out of the grate. Correct the pellet/air set by
reducing the percentage of air (from 0 to -5); if not
sufficient, also increase the percentage of falling pel-
lets (from 0 to +5) to arrive to the condition in Figure
3. If the changes made to the settings do not bring the
fig.1
stove to the right combustion conditions in Figure 3,
combustion, "spring" flame in "wood stove" style with high quan-