One of the simplest of fuels, this is wood chopped into chips. The key parameters for good wood chip fuel are chip size and moisture content. In some boilers, tree species and mineral content is also important as corrosive gases can be created during combustion. Wood chips are used in domestic and commercial boilers for generation of hot water and space heating.

Wood ChipThe key parameter that affects both how the chip burns and its energy output is the moisture content. A newly felled tree will typically have a 50% moisture content and will be more difficult to burn, with less energy output. Seasoning is usually employed to reduce the moisture content. This is the same process used for the preparation of logs for use as firewood. The lower the moisture content, the greater the energy value. There are a wide variety of wood chip boilers, which all require control over the wood chip specification. In simple terms, the less technologically advanced the boiler system, the less variation is permitted in the fuel. There are boilers that will permit a wide variation of both particle size and moisture content, but retain a high level of efficiency, allowing the fuel cost to be minimised but the initial capital investment is greater. Automated gas-generating boilers Pellet fuel - the equipment is new, the efficiency of these plants comes to 96.8%. Storage bin pellets embedded directly into the boiler body. At the bottom of the hopper is slanted screw that lifts the pellets to a stripper drum, from which they are poured in portions into the gasification chamber at the ceramic grate reactor. Fuel is heated by the hot reactor (lattice temperature - 1200 ° C) decomposes to water vapor, resins and oils. Further reaction between carbon and oxygen in the air provides a temperature sufficient to form carbon monoxide - the main component of produced gas. Resins and oils pellets decompose into gases containing vodorod.Za account vacuum created by the fan, smoke exhauster boiler of the gasification chamber a combustible gas into the combustion chamber to be located "under the floor" - under the reactor. Here the product gas is burned, and the fiery combustion products move into the heat exchange part, equipped turbulizers-cleaners, where they are cooled and then thrown into the chimney smoke exhaust. The minimum amount of ash and non-combustible components of pellets (usually inorganic inclusions trapped in the pellets in production) remain inside the combustion chamber. They must be regularly (depending on pellet quality) remove from it using a special tool.