~ 8300 to 13,000 BTU/pound. See attached link. For different units, 1 btu/ pound - 2.2326 kjoules/kg and 0.446 kilocalories/kg.
Anthracite has the highest calorific value. and South African coal is best in the world.
42
It varies based on the type and grade of coal. The heat value is less for bituminous than for anthracite, etc.
GCV, gross calorific value, is the quantity of heat produced by combustion. UHV, useful heat value, is the gradation of non-coking coal.
Calorific Value of Coal can be determined by employing an apparatus called the Bomb Calorimeter. However, this instrument is expensive. Alernatively, you can send the sample to an INDEPENDENT laboratory who normally carry out the test for a certain fee. Less accurate measurements can be made using a thermometer, an insulated contained and a known amount of coal.
Anthracite has the highest calorific value. and South African coal is best in the world.
42
Coal
Gross calorific value of coal
what is the differnence between gross calorific value and useful heat value
gross calorific value
To calcualte NCV you need calorific value on GAR, H on gar and Total moisture.
Coal-peat-lignite-dried wood
Useful heat value(UHV) pricing mechanism of coal deducted ash and moisture content from standard formula and in this coal is categorised into 7 grades. Gross calorific value(GCV) of coal has 17 grades and prices are linked to the actual calorific value/quality of coal-by latika joshi
NCV means Net Calorific Value. The lower calorific value or Net calorific value (NCV) which supposes that the products of combustion contain the water of combustion to the vapor state. The heat contained in this water is not recovered.
it is for determining gross calorific value of any coal
It varies based on the type and grade of coal. The heat value is less for bituminous than for anthracite, etc.