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Hello Rebecca,
Sweet Chestnut should not cause any problems if used for down draught
gasifiers. As with all woods used for gasification, the moisture content
should be as low as possible (15 - 20%) and you need to closely monitor the
chip size.
The big trap for most projects drawing wood from city forestry, is the use
of drum chippers which make a lot of fines and is very poor gasifier fuel. I
am pretty sure there was a lot of chestnut chipped at Rural Generations
Brook Hall Project in Londonderry following Winter gales a couple of years
ago and there were no unusual problems, although it was mixed with other
hardwoods.
Make sure you use a screw auger chipper with a medium size chip (50 x 25 x
5) and it should work fine.
Problems with coppice willow gasification can be overcome with a correctly
designed gasifier, and again the correct cutting size of the chip. If you
haven't done so, you can read about our work with the fuel on the Fluidyne
Archive www.fluidynenz.250x.com
Hope this helps
Doug Williams
FLUIDYNE GASIFICATION
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