Non renewable energy:(coal)

Coal is a combustible black or brownish-black sedimentary rock composed mostly of carbon and hydrocarbons.

Coal is made of the remains of ancient trees and plants that grew in great swampy jungles in warm, moist climates hundreds of millions of years ago. Coal is ranked very high if it has undergone a longer carbonization period. An example is Anthracite. Coal that has not undergone too much carbonization is ranked low, and an example is Peat.

Let us take a look at the diagram below:

1. Coal is milled to a fine powder, allowing it to burn more quickly. It is blown into the combustion chamber of a boiler where it is burnt at high temperature.

2. The hot gases and heat energy produced converts water in tubes lining the boiler into steam.

3. The high-pressure steam is passed into a turbine containing thousands of propeller-like blades. The steam pushes these blades causing the turbine shaft to rotate at high speed. The steam is condensed and returned to the boiling chamber where it is heated again.

4. The shaft rotation engages the wire coils and magnets in a generator connected to it. This charged magnetic field produces electricity

5. Electricity is sent to the switchboard where it is regulated and sent via on-land cables to homes.