The common interpretation of a biomass stove, is a log stove. Combustion logs as a source of heat in a living room or open plan living space has been done for hundreds even thousands of years. Yet, for many years the humble log stove has been seen more as a different temperature source for one room or even a style choice, rather than a complete solution to dwelling heating. There are more than a few reasons for this, firstly a log stove is a lot of work for people by way of a busy modern behavior. The stove will also not generate a lot of useable temperature, it may make the living room very warm, but the rest of the property will not benefit from the heat. A modern biomass stove which can meet the users demands must generate more useable heat in addition to at the same time be low maintenance. However wood logs are the predominant interpretation of biomass, there are many other forms of biomass which can also be used as wood fuel. Wood simply refers to any form of unrefined matter which can be used as a energy source. This includes wood logs, but also biomass chips as well as sawdust from wood processing operations. There are other sources of biomass such as agricultural waste such as straw as well as other waste from food production. This biomass reserve is particularly under utilized along with has very little value. Most wood resources on the other hand cannot be used as fuel in their raw form. Proficient burning is down to fuel density as well as fuel moisture content. To process biomass into the most efficient form of solid energy, the most practical process is to upgrade the biomass into pellets. Pellets have a much higher density, as well as also have a low moisture content, generating more heat.
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The properties of pellets mean they flow well through feed hoppers and can light quite easily along with quickly. This technique that pellets can easily be used in automatic and sophisticated heating systems. Wood burners therefore can be restricted via a thermostat the same as any other oil or gas heating system. When the thermostat demands more temperature the auger system on the wood stove will feed more pellets into the fire. If the fire is not lit, then a hot rod igniter will start the fire by way of a higher fan speed. Once the fire is lit the fan speed will lower to achieve the correct burning temperature to maximise heat generated while keeping fuel consumption to a minimum. It is these features which makes wood pellet stoves more of a realistic full heating solution.
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The wood stove can be used to provide temperature for a single room, or by way of a boiler can be used to feed into your existing central heating system. The amount of maintenance required for the pellet stove will depend the features included in addition to the size of the energy hopper. Generally the size of pellet fuel hopper on the wood stove will hold enough fuel for at least a day, which is already much greater than a log stove, which will need fuel loading more than a few times a day. On the other hand some biomass pellet stoves can have fuel hopper extensions so the stove can run for a week or even several weeks without the call for to refuel. To minimise fuel loading, it is likely to link a biomass stove by means of an large external energy hopper which will feed the smaller hopper on the stove. The large external hopper can hold up to year worth of energy, along with be loaded by a pellet fuel tanker which blows in pellets.
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