Question

Define fuel, calorific value. Describe two types of the calorific value of fuel.

Answer 1

material such as coal, gas, or oil that is burned to produce heat or power.

The energy contained in a fuel or food, determined by measuring the heat produced by the complete combustion of a specified quantity of it. (This is now usually expressed in joules per kilogram.)



Two types of calorific values are Higher Calorific Value and Lower Calorific Value .

Higher Calorific Value (HCV) or Higher Heating Value (HHV) or Gross Calorific Value: When 1 kg of a fuel is burnt, the heatobtained by the complete combustion after the products of the combustion are cooled down to room temperature (usually 15 degree Celsius) is called higher calorific value of that fuel.


Lower Heating Value (LLV) or Lower Calorific Value (LCV) or  Net Calorific Value: When 1 kg of a fuel is completely burned and the products of combustions are not cooled down or the heat carried away the products of combustion is not recovered and the steamproduced in this process is not condensed then the heat obtained is known as the Lower Calorific Value.

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Answer 2

Answer:

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