Resources
Doug Williams Engine Tables
Based on wood moisture content of 15% wet basis
Woods gross heat energy content: 15,490kJ per kg
Woods gross heat energy content: 6,600 BTU per lb
Or 4.3kW heat per kg. Or 2.615HP per lb
Gasifiers energy conversion efficiency: 73.57% HOT GAS
Gasifiers energy conversion efficiency: 70.95% COLD GAS
AFTER GASIFICATION
Gas produced from 1kg of wood: 2.185 standard cubic metres
Gas produced from 1lb of wood: 35 standard cubic feet
Energy content of 1 standard cubic metre of gas: 5,030kJ
Energy content of 1 standard cubic foot of gas: 135 BTU
After gasification 1kg wood yields 2.185 cubic metres of gas which has a nett heat energy content of 3.05kW heat.
After gasification 1lb wood yields 35 cubic feet of gas which has a nett heat energy content of 1.8566HP heat. (Or 4,725 BTU)
1kg of wood produces 2.185 cubic metres of gas
or 3.165kW heat from burning gas direct
or 0.837kW of shaft power i.e engine
or 0.754kW of electric power generated
1lb of wood produces 35 cubic feet of gas
or 4,900 BTU heat from burning the gas direct
or 1.925HP heat from burning the gas direct
or 0.51 HP of shaft power i.e engine
or 0.459HP of electric power generated
or 0.342kW of electric power generated
1 litre of diesel has a heat energy content of 9.630 kW heat (or 32,895 BTU)
1 litre of petrol as a heat energy content of 8.79 kW heat (or 30,023 BTU)
1 litre of diesel has the same heat energy content as the cold gas from 3.1579kg of wood
1 litre of petrol has the same heat energy content as the cold gas from 2.882kg of wood
