The calorific value is the measurement of heat or energy produced and is measured in terms of gross calorific value or net calorific value. Gross calorific value (GCV) assumes all vapour produced during the combustion process as fully condensed. Net calorific value (NCV) assumes the water leaves with the combustion products without fully being condensed. Fuels should be compared based on the NCV.
The calorific value of coal depends on the ash, moisture content and the type of coal. The typical GCVs of some of the commonly used liquid fuels are as follows: Kerosene oil (11,100 kcal/kg), diesel oil (10,800 kcal/kg), Light Diesel Oil (LDO) (10,700 kcal/kg), furnace oil (10,500 kcal/kg), and Low Sulphur Heavy Stock (LSHS) (10,600 kcal/kg).
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