Diagram of electricity production using coal in 7 steps class 7
1. Coal extraction: The first step in electricity production using coal is the extraction of coal from mines. This involves mining operations to access the coal deposits underground or through open-pit mining.
2. Transport and storage: After extraction, coal is transported to a storage facility, usually by trains or conveyor belts. The stored coal acts as a reserve for future use and to maintain a constant supply for the power plant.
3. Combustion in a boiler: The coal is then fed into a boiler where it is burned. The combustion of coal generates heat, which is used to convert water into high-pressure steam.
4. Steam generation: The heat from the burning coal is transferred to the water in the boiler tubes, causing it to evaporate and form steam. This high-pressure steam is used to turn the turbine blades.
5. Turbine operation: The steam flows through a series of turbine blades, causing the turbine to spin. The spinning turbine drives the generator, which produces electricity.
6. Cooling: After passing through the turbine, the steam is condensed back into water by cooling it with a coolant, such as water from a river or cooling towers. This condensed water is then recirculated back to the boiler to be heated again.
7. Electricity transmission: The generated electricity is then transmitted through power lines to various destinations, such as homes, industries, and businesses, where it can be used for various purposes.