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ENERGY AND THE NATIONAL ELECTRICITY NETWORK (HOW A COAL POWER STATION…
ENERGY AND THE NATIONAL ELECTRICITY NETWORK
ELECTRICITY FROM COAL
electricity is generated in a power station
a power station is a system for making the generation of electricity
a lot of energy comes from coal
most power stations in SA are in Mpumalanga
HOW A COAL POWER STATION WORKS
1:coal in a furnace is used to heat water in a boiler
2:steam is generated which moves through pipes to the turbine
3:the steam moves through the turbine that has wheels with blades like a fan
-as the steam moves over the blades,the energy in the steam causes the turbine to rotate
4:the turbine is connected to a drive shaft that causes a generator to rotate
-as the turbine rotates the energy in the moving generator is converted into electrical energy
5:the electricity is changed into the correct voltage in a transformer
6:electricity is distributed to pylons, factories,schools,houses etc
ELECTRICITY GENERATION FROM ALTERNATIVE ENERGY SOURCES
coal is not the only source for electricity
other sources may be used
wind power may be used
falling water-hydraulic electricity
solar power
wave power