Posted by centash on July 29, 2015 at 15:43:24 from (67.220.45.254):
In Reply to: Wood gasification posted by notjustair on July 29, 2015 at 12:55:51:
I have a unit here on my farm. My Dad used one exclusively during WW2 in Holland to power his custom threshing business---he had to, since there was no gasoline allotment. After he retired here in 1987 from dairy farming and operating a farm repair business,he decided to build one just to show his Canadian friends that indeed his tractor ran on "...old fence posts and tree stumps..." He mounted it on a 1952 E27N Fordson tractor. My Dad has since passed, but my brother and I usually fire it up once a year just for fun.
The combustible gases given of by heating the wood (or almoat any organic matertial) are a combination of methane, hydrogen and carbon dioxide which in itself is not combustible but aids in the gasification process. Dad's outfit would burn 30 lbs of dry cedar wood per hour while producing 20 to 25 HP in the Fordson.
The process involves heating the 'fuel ' to a temperature at which it starts to 'gas off' in an oxygen poor environment. If you are familiar with wood stoves you have no doubt heard one go "whoomp" when you opened a door or allowed air to enter. That 'whoomp' is the gases given off by the wood suddenly receiving a bit of oxygen and igniting. In the gasification process, the oxygen )air) is allowed to enter the combustion area in a controlled process producing a more or less steady flow of combustible gas which are forced to enter the engine and burnt there.
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