The Combustion
Even with a good quality charcoal burning her to be efficient to obtain better results south. This is especially true in domestic use, which is burned as much charcoal. The industrial furnaces to burn the charcoal, such as blast furnaces, domes, ovens precipitation. Are generally designed and made to function efficiently; will not be discussed here. The main job of charcoal, households in the world in development path, is to heat water or to cook food, is to have hot water for washing. Some foods are cooked directly over the fire without submerging in water, as for roasted corn and roasting meat. One method would be cooked 100%. efficient if all the heat released by burning fuel, was taken because of the food is cooked., which is far from the case in practice. A typical result, teams for well-designed and made to work well, is that of an efficiency of about 30%, meaning that 70% of heat is lost unnecessarily. In cold weather, can be captured part of this wasted heat and used to heat the atmosphere of the fourth, fulfilling therefore a useful function which increases overall efficiency.

Theoretically, it is possible to increase the efficiency of heat transfer from coal burning the food, increasing the cost and complications of the kitchen, but rarely is impractical. Who could have allowed this complication would not be generally burning charcoal, but some other fuel greater prestige or social convenience. It is necessary to reach a compromise to get the best possible efficiency, in line with kitchen facilities simple and inexpensive that could be used by most users of charcoal. The charcoal, unlike wood, it transfers a lot of heat for its pottery, kitchenware, radiation from the fuel burning bed. With the burning firewood, where hot gases are produced by high flames lazy, transferring a lot of heat for cooking pots must be by convection. For the transfer of heat by convention, the hot gases must physically touch the container, while the radiant heat is transferred by infrared radiation, emitted directly by the burning bed and absorbed by the surface of the vessel or other object. Therefore, the vessel must be able to''see "the burning bed to collect and absorb the radiant heat energy. The surface of the vessel plays a very important role, and should preferably be matt black, and the same vessel must also be a good host. Aluminum thin blackened by fire is probably ideal. Possibly the worst thing is coarse pottery low density. Pots blackened by fire should not be cleaned by outside, but removing the layers of soot loose Tar and soft.