Burn-Off Phase; Expansion Noises; The Chemistry Of Wood; Contribution To Environmental Protection - HASE SENDAI PRO 165 Mode D'emploi

begins at a temperature of about 225°C (ignition
temperature) with the ignition of the resultant gases
and the release of heat. There must be an adequate
supply of oxygen available for this purpose. The
peak of the combustion process is reached at
approx. 300°C. The reaction process is now so
rapid that the largest amount of heat is released at
this point; flames can reach temperatures of up to
1100°C.

10.3 Burn-off Phase

Glowing charcoal embers remain after the volatile
components have been burned off. These burn
slowly, almost without flames, at a temperature of
approx. 800°C.
Crucial to a clean and efficient combustion process is
a complete as possible chemical reaction of the wood
gases with the oxygen in the combustion air. In your
HASE stove, the combustion air is pre-heated and
guided into the fire box via wide air inlet openings, so
that at high temperatures, there is a good, thorough
mixing of the gases with the air. An important
variable in any combustion phase is the amount
of combustion air. Too little air leads to an oxygen
deficiency and incomplete combustion, while too
much air reduces the fire box temperature and thus
the efficiency. Incomplete combustion can generate
air pollutants such as dust, carbon monoxide, and
hydrocarbons.
Degasification
Burn-off
fig. 3

10.4 Expansion Noises

Steel expands upon heating and contracts as it cools.
These movements occur during the warming up and
cooling down phases, as well as when adding fuel.
They can cause your stove to emit audible expansion
sounds. However, the design and construction of
your stove takes this into account and prevents this
physical process from damaging the stove.

11. The Chemistry of Wood

Wood predominantly consists of the elements
carbon, hydrogen, and oxygen. It contains virtually
no environmentally hazardous substances such
as sulphur, chloride and heavy metals. As a result,
complete wood combustion produces mainly carbon
dioxide and water vapour as the primary gaseous
products as well as a small quantity of wood ash as
the solid combustion residue. On the other hand,
incomplete combustion can generate a number of
pollutant substances, such as carbon monoxide,
acetic acid, phenols, methanol, formaldehyde, soot,
and tar.
12. Contribution to Environmental
Protection
Whether your stove burns in an environmentally
friendly or environmentally hazardous manner
depends to a large extent on how you operate it and
the type of fuel you use (see Section 9, "The Right
Drying
Fuel").
Therefore, use only dry wood; hardwoods such as
birch and beech are most suitable.
Only use small pieces of wood to light the fire. They
burn faster than large logs and as a result, the
temperature required for complete combustion is
reached more quickly.
For continuous heating, adding smaller quantities
of wood more frequently is more efficient and more
ecological.

13. Evaluating the Combustion Quality

The following characteristics can help you evaluate
the quality of the combustion:
- Colour and composition of the ash:
If the combustion process is clean and
efficient, the result is a fine white ash. Dark
colouration indicates that the ash contains
charcoal residue; in this case, the burn-off
phase was incomplete.
- The colour of the flue gases emitted at the
chimney pot:
Here, the following applies: the more
invisible the flue gases exiting the
en
47