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Along by way of the necessitate to better utilize alternative along with alternative fuel sources, making better use of the fuel source plus efficiency are also areas that necessitate more attention. To create better use of a biomass energy source, cogeneration is an area of potential. Cogeneration in term of wood for heating along with electrical generation. Many believe the future of the electrical network is less towards large scale power plants plus more towards small scale electrical generators feeding the grid. By way of generating both warmth and electricity can dramatically amplify the efficiency of the amount of energy captured from the wood. There are two main ways in which both warmth plus 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, in addition to recycle the hot water, so only a small amount of fuel 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 along with working fluid. Pared up to a small pellet stove or boiler, residual warmth energy from the vent for instance could be used to generate electricity. This electricity could then be used to power the property, as well as 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 workings 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 and electricity can be used in an standard internal burning engine to generate both electricity as well as heat. With a one to one ratio of syngas to air, the gas can be used to power the engine. The waste heat coming from the engine in addition to exhaust gases can be used to heat the property. Gasification is also gaining ground as a reliable form of clean fuel construction, which again can use the current infrastructure of internal burning engine but with low carbon.

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

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