Energy And Their Types

Energy

        The energy word is derived from Greek word En-Ergon which means in work or work content

Energy can be classified into following types (based on criteria)

1) Primary and secondary Energy
2) Commercial and Non-Commercial Energy
3) Renewable and Non-Renewable Energy
4) Conventional and Non-Conventional Energy

1) Primary and secondary Energy =

      This sources are found or stored in nature
Example: Coal,Oil,Natural gas,Bio-mass (wood)
      Other primary sources are available include energy from radio active substances thermal energy stored in earths interior and potential energy due to gravity

2) Commercial and Non-Commercial Energy =

A) Commercial Energy :

     The energy sources that are available in the market for a definite price are known as Commercial Energy
Example: Electricity,Oil,Coal,Natural gas

B) Non-Commercial Energy:

    The energy sources that are not Available in the market for a price are called Non-Commercial Energy
Example: Fire wood,Solar energy,Agrowaste

3) Renewable and Non-Renewable Energy =

     Renewable energy is energy obtain from sources that are essentially inexhaustible
Example: Solar power,Wind power,Geothermal,Tidal energy,Hydroelectric power
     Non-Renewable energy is conventional fossil fuels such as Coal,Oil and Gas

4) Conventional and Non-Conventional Energy =

     This energy is being traditionally used for many decades
Example: Fossil fuels,Nuclear and Hydro resources
     Non-Conventional energy sources are used at large
Example: Solar,Wind and Biomass