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Published byDrusilla Green Modified over 8 years ago
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Wood Combustion ● Not used as much in the past. ● Low cost / Low efficiency. ● Poses some environmental concerns including: erosion and flooding form wood gathering, and the emission of carcinogens.
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The Wood Cumbustion cycle -3 components nessicary : wood (fuel), air, and high tempretures 1)Moisture evaporates from the wood. So fresh or green wood does not make an efficient fuel. 2)Wood catches fire at 315 degrees Celsius. 3)The burn wood decomposes to charcoal and smoke. This material will combust at tempretures approaching 600 degrees. A duel combustion stove is required to do this.
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Stove Design and Efficiency ● In a standard fire place only the fist stage of wood combustion takes place and much of the chemichal energy in the wood goes out the chimney. ● Tradtional fireplaces also pull in cold air from outside to replenish the air being consumed in the fire. Because of this some fire places have negative efficiencies. ● To increase efficiency you can reduce the air intake by adding a glass screen in front of the fire. Or you can arrange the logs in way so that they burn more rapidly.
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Dual Burning Stoves -By sending the smoke through a second “combustion area” we can extract more BTU's per unit weight of wood.
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Cooking stoves in Developing Countries ● This 3 stone stove is used for cooking in many develpoping countries. ● Wood is fed into the fire and used to heat the pot for cooking.
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