FUELS AND THEIR CLASSIFICATION
,Fuels: Any compound which on burning in the presence of air or oxygen (combustion) produce a large amount of
heat that can be used economically for industrial and domestic purpose is known as fuel.
Fuel + Oxidant combustion products + energy
,
, COMPARISION BETWEEN SOLID, LIQUID AND GASEOUS FUELS
Property Solid fuel Liquid fuel Gaseous fuel
Calorific value Low higher highest
Cost Very cheap costly costly
Ash High negligible Nil
Rate of combustion Not controllable controllable controllable
Air used Large excess Small excess Just sufficient
Space for storage Small smaller Very large
Thermal Efficiency Low high high
,Fuels: Any compound which on burning in the presence of air or oxygen (combustion) produce a large amount of
heat that can be used economically for industrial and domestic purpose is known as fuel.
Fuel + Oxidant combustion products + energy
,
, COMPARISION BETWEEN SOLID, LIQUID AND GASEOUS FUELS
Property Solid fuel Liquid fuel Gaseous fuel
Calorific value Low higher highest
Cost Very cheap costly costly
Ash High negligible Nil
Rate of combustion Not controllable controllable controllable
Air used Large excess Small excess Just sufficient
Space for storage Small smaller Very large
Thermal Efficiency Low high high
