Slow Combustion Fireplaces
The environment :
When a tree decomposes in nature it releases into the atmosphere a certain quantity of CO2 (carbon dioxide). This, however, is re-absorbed and used in the growth of new trees.
Biomass: Clean, renewable energy
The term “biomass” can refer to any material of organic origin (i.e. vegetable or animal), that has not become fossilised, and that can be burned to produce energy.
Biomass materials are renewable fuels since the CO2 emitted during their combustion does not add to the carbon dioxide already in the atmosphere. In the case of wood, the CO2 released is that which the tree has absorbed during its lifetime, and that would in any case be returned to the atmosphere when the tree dies, through the normal decomposition of organic matter. The burning of biomass merely accelerates the return of this CO2 to the atmosphere, making it available for use by new plant life. CO2 emissions from biomass fuels are therefore a natural part of the normal carbon cycle, and do not affect the balance between emitted CO2 and absorbed CO2.
The effective use of organic materials can make a major contribution to the production of thermal energy (heat). In medium and large systems these materials can even generate electrical energy, thus reducing carbon dioxide emissions in line with the requirements of the Kyoto protocol.
Stove and fireplace technology explained
Primary air is the combustion air needed to feed the fire and is generally delivered via a controllable air vent on the door of the stove.
Most slowcombustion fireplace with the exception of a few all have secondary air “air wash” systems. Pre-heated air is collected through a front air take and is jetted down the back of the high temperature ceramic glass. This system keeps any volatile by products of combustion away from the glass, improving your view of the flame picture. By running the stove at the correct temperature in conjunction with the correct fuel the glass will remain clear.
Teriary air is brought in from outside the stove and heated through internal ducting and injected via rows of holes into the top of the combustion chamber. This action causes the un-burnt gases (bi product of the fuel) to be re-ignited and burnt again producing extra heat and cleaner emissions. The stove must be burning at its optimum temperature (350°C) to achieve clean burning efficiency and to reduce emissions.