Along by means of the call for to better utilize renewable along with renewable energy sources, making better use of the fuel source in addition to efficiency are also areas that necessitate more attention. To make better use of a wood energy source, cogeneration is an area of potential. Cogeneration in term of wood for heating as well as electrical generation. Many believe the future of the electrical network is less towards large scale power plants along with more towards small scale electrical generators feeding the grid. With generating both warmth in addition to electricity can dramatically raise the efficiency of the amount of fuel captured from the biomass. There are two main ways in which both heat and electricity can be generated for cogeneration. One of them being modern closed loop steam engines. These units are far more efficient than previous steam systems, plus recycle the hot water, so only a small amount of energy is required to turn that hot water back into steam to move the pistons, which in tern mover the generator to manufacture electricity. Using modern alloys these engines use deionised water as both the lubricant in addition to working fluid. Pared up to a small pellet stove or boiler, residual heat fuel from the flue for case in point could be used to generate electricity. This electricity could then be used to power the property, in addition to it not required sent into the grid.

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Gasification is the other renewable to the closed loop steam engines. Gasification is the process of breaking down wood into its core mechanism into a gaseous fuel called syngas. This syngas if properly filtered burns very cleanly. To generate warmth the gas can be burnt directly, or to generate warmth as well as electricity can be used in an standard internal burning engine to generate both electricity and warmth. By means of a one to one ratio of syngas to air, the gas can be used to power the engine. The waste warmth coming from the engine and exhaust gases can be used to warmth the property. Gasification is also gaining ground as a reliable form of clean energy production, which again can use the current infrastructure of internal incineration engine but by way of low carbon.

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Though for gasification cogeneration systems to work efficiently as well as reliably, the units prefer a standardized fuel source. Biomass in its raw form is anything but consistent. Changes selection from size, density as well as moisture content. All of these factors outcome the gasification process. Therefore to help the gasifier work efficiently, compressing the wood into pellets can produce a significant difference. Pellets have a much higher density, in addition to low moisture content. As the pellets also have a consistent size they flow well due to the gasifier reactor, dropping bridging issues. Pellet making required more than a few processes. Initially the wood must be reduced in size comparable to a dust. Then depending on the chosen biomass this dust may require drying. A moisture content of around 15% is required to form a high density pellet along with reach the required compression temperatures. Once the matter is sufficiently dried, it is then metered into the pellet mill where final pellet compression takes place.

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