It is established that the use of wood in the form of coal wastes 4/5 of its calorific value. In addition, the performance of the charcoal fireplace is poor, it is common to burn 50 to 100 grams of coal to bring 1 liter of water to a boil while in a well-built wood stove this specific consumption is from order of 50 g of wood per liter of water. We thus arrive at the following comparison:
To boil a liter of water in a wood stove type MIHA / REDI: 50 g of wood
In a charcoal brazier: 50 g of charcoal
These figures lead to a consumption report:
1 kg of firewood for 10 kg of wood processed into 1 kg of charcoal
Unfortunately, there are many obstacles to the process of switching from coal to other fuels.
We must overcome ignorance of the nature and properties of coal. We must fight deeply rooted habits. Good multi-fuel furnaces, at an affordable price, are totally lacking in most markets. Finally, above all, in many countries a powerful lobby dominates the production and distribution of charcoal.
A common argument for charcoal is that transport costs seem to be reduced relative to the cost of transporting wood. In fact, the calorific value of charcoal is about twice that of wood.
This argument ceases to be convincing when considering the difference in efficiency between a modern wood stove (about 50%) and a traditional coal stove that uses only 25% of the heat energy. . Under these conditions, the transport costs of a unit quantity of useful heat from wood or coal are the same.
Article written by the Swiss non-profit association REDI, an Institute for the Development of Renewable Energies.
REDI Rue du Vidollet 5 CH-1202 GENEVE Phone + 41 (0) 22 733 74 22 Fax +41 (0) 22 733 50 49
Ditto, with a wood gasifier, we take less wood in the forest for more calories to use, so using a wood gasifier is essential, having less slag problem with burning with a gasifier charcoal ,
it is essential for the future to work for the southern countries on the wood gasifier of a drying less than 10% moisture made in the sun
I allowed myself to make this answer, not seeing Steve react.
garry, the Japanese gasifier is from around 1940, the president of Yanmar around 1930, visited a hardware fair in Germany, he discovered the MAN engine, he built it in the same concept in his country, during the WW2 he was working on charcoal, then at the end of the war, he developed small models for agriculture, which later gave the Yanmar serie TF that we know today.
What I could understand.