Biomass Boilers: How They Work
Wood pellet biomass boiler
A - Pellet loading door
B - Fuel storage compartment
C - Intelligent feed system
D - Combustion chamber
E - Automated ash compartment
Pellets are fed into a fuel hopper at the rear of the boiler.
When there is a demand for heat, a motorised feed mechanism (auger) automatically feeds pellets into the combustion chamber.
A built in modulating fan delivers the precise amount of primary air require to ensure the boiler operates at maximum efficiency.
The temperature is regulates by a thermostatic controller in conjunction with the modulating fan.
When the set temperature is close to being achieved, the controller starts to modulating fan and the auger reduced the fuel supply to ensure the required temperature is maintained using the minimum amount of fuel.
Log burning gasification biomass boiler
A - Log loading door
B - Fuel storage compartment
C - Intelligent feed system
D - Combustion chamber
E - Automated ash compartment
The boiler is stacked with logs and lit.
Combustion is regulated by a thermostatically controlled draught fan, which draws air into the flame tunnel and creates a partial vacuum in the combustion chamber, ensuring complete combustion.
Once the main burn is completed and the boiler temperature reduces the fan will automatically switch off.
The heat produced during combustion heats the water, which is then stored in buffer storage tanks.
The domestic heating and hot water system then draws heat form these buffer tanks as and when required.
When the temperature of the buffer storage tanks drops to approximately 45°C the system is ready for another combustion cycle.
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