Pellet heating

In order to improve energy efficiency and reduce harmful emissions, pellet ovens are usually combined with buffer systems like water tanks, for example.

[1] Separate pellet burner, which can be mounted to an existing oil- or wood-fired boiler, are sometimes offered as an inexpensive alternative to a complete heating changeover.

The control technology of the system regulates the fuel input gradually in order to match the required heat output.

Depending on the specific system, the supplied wood pellets are automatically ignited either with hot air blowers, or it uses a permanent ember bed in the combustion chamber.

[2][3] For more efficiency and less pollution in the air, modern pellet heating systems control combustion either via a temperature or flame space sensor in combination with an infinitely variable input of combustion air via a suck-blow fan or a lambda probe.

The hot flue gases are led into the chimney via a heat exchanger with manual or automatic cleaning of the reheating surfaces.

The wood pellets are stored in bulk in a tank or storage area and supplied to the burner by means of a conveyor system.

More outlets in the storage room ensure unobstructed operation even in case of problems of one of the extraction points.

In areas with high humidity it is important to use must tight tank systems to ensure the quality of pellet fuel.

Blower systems can be used flexibly and feed distances up to 20 m. The discharge from the storage room or container is usually also supported by an inclined tank bottom or a hopper outlet.