a standard cord (128 cubic feet) of hardwood and 1 ton of rice coal have about the same btu's so 20 cords ~ 20 tons http://www.uwsp.edu/CNR/wcee/keep/Mod1/Whatis/energyresourcetables.htm
b
coal in Zimbabwe is used for many reasons. Some of them being heat (although that is not needed much in Zimbabwe) and most of it for electrical power in Zimbabwe.
The same as you would calculate for any other substance. You have to multiply all of the following: • The desired temperature difference. • The mass of the sample. • The specific heat, in this case, of coal.
Diamonds are not made from coal. Diamonds are formed deep within the earth's mantle under enormous pressure and extreme heat, from carbon.
In the basement, a miniature railroad transported fuel from the coal bin to the boilers. On a typical winter day two tons of coal would be consumed to heat the mansion. And although Carnegie's drink of choice was Dewar's scotch, the basement included a 1500-bottle wine cellar.
Well, if you use coal for heat, then wrap in winter clothing and/or coats and stay that way to avoid using coal in which you COULD use in the harsh winter. (though it depends where one would live). Though if it is for electricity, then don't use so much.
As much as you want, as long as you keep supplying heat. That's exactly how electricity is produced in nuclear power plants, and in the ones that burn stuff, like oil, coal, natural gas etc.
A coal fired station burns coal to produce heat. The heat boils water to produce high pressure and temperature steam. The steam expands in a turbine to rotate the shaft. The turbines rotation drives a generator. The generator produces electricity which is sent out to the consumers. . I hope this helped, believe me i am a proffesional scientist
The fine coal dust is much more combustible than large lumps of coal. Large lumps of coal takes time for the flames to begin burning it efficiently - so heat takes longer to build up in the furnace.
An average energy density of coal is about 24 megajoules per kilogram. This is the equivalent of about 6.67 kW·h of energy per kilogram of coal, However with the various energy transformations in the power plant (coal to heat, heat to steam, steam to mechanical movement of the turbines) and the loss of heat to the air water and solid waste less than 30% of that will become electricity. Lines losses and user losses will reduce this even further if end user available power is calculated.
how much dose a ds cord cast
First, the price of coal has remained relatively stable in recent years in comparison to the costs of competing fuels. Second, present day technology permits the burning of coal in a much cleaner fashion than in the past. Third, and also very important, is the ready availability of coal: it represents more than four-fifths of America's known recoverable fossil fuel reserves.