The heating value (or energy value or calorific value) of a substance, usually a fuel or food (see food energy), is the amount of heat released during the combustion of a specified amount of it. The energy value is a characteristic for each substance. It is measured in units of energy per unit of the substance, usually mass, such as: kJ/kg, kJ/mol, kcal/kg, Btu/lb. Heating value is commonly determined by use of a bomb calorimeter.
Heating value unit conversions (for more visit Wolfram Alpha):
- kcal/kg = MJ/kg * 238.846
- Btu/lb = MJ/kg * 429.923
- Btu/lb = kcals * 1.8
The heat of combustion for fuels is expressed as the HHV, LHV, or GHV.
Read more about this topic: Heat Of Combustion
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