Biomass Boilers Help Fight Climate Change

Oct 12th, 2008 | By Tal Potishman | Category: Business
by Tal Potishman

In the last few years it became impossible to get away from the hype about green technologies versus fossil fuel technologies. Solar panels, solar thermal and wind turbines have ruled the headlines with major projects undertaken around the world. However, let us not forget the humble wood burning stove. Although not as flashy as a gleaming white wind turbine rotating at a steady speed over a green hill or a high-tech solar photovoltaic cell generating electricity out of simple sun light, the wood burning stove has some important benefits to bring to the table.

First let’s understand how it works. Biomass means that the energy is produced from organic sources (bio-energy). The energy is released when organic sources (wood in this case) are burned, in the same way as mankind was doing for centuries. The fuel used in biomass boilers is either untreated wood or treated wood. Most common fuels are logs, wood chips and wood pallets.

From the types of wood used by biomass boilers the most effective and ‘user-friendly’ is the wood pallets fuel. Wood pallets are actually sawdust, which is compressed under high pressure into small pallets (roughly 5 cm in length). During the compression, the saw dust loses its moisture, making the pallets very dry and highly potent in terms of output to weight ratio. This ensures full burning performance and low residue on the burners.

When we burn fossil fuels, we release a high volume of carbon that was previously captured underground for millions of years. During the burning process, the resulting carbon dioxide is emitted into the atmosphere and contributes to the climate change phenomenon. Boilers that burn wood, however, are much less harmful as they only release carbon that was captured by the plant during the years. They do not bring any more carbon into the delicate balance of our plant and are generally considered to be carbon neutral.

Before going ahead and purchasing a biomass boiler, there are several points you should consider:

* Wood supplier - it is much easier to run a biomass boiler if you have a local sawmill or carpentry workshop that can provide you with a reliable source of sawdust, wood chips or even wood pallets.

* Room for the boiler - since biomass boilers are relatively big (especially when compared to modern condensing boilers) it is important to take into account their size and the required space for fuel storage next to them.

* Chimney consideration - a biomass boiler requires a chimney, and more specifically a lined chimney that is designed for wood fuel. However, in most cases such lining can be retro-fitted to carry the smoke.

* Zone specific considerations - if your home is located in a smoke-free zone, you may need to focus on getting a unit that is ‘exempted’ under the ‘Clean Air Act’. In any case, it is recommended to check with your local authority.

* General considerations - check with your council on other implications in reference to your boiler installation. If you live in a conservation area or your property is a listed building, you may have to clear this with the planning department at your council.

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