Working of Coal Power Plant:
The work of the coal power plant begins with the arrival of coal from the coal mines via trains. This coal is then transported to the power plant to be converted into a powder form. The main reason behind converting it into powders is to increase the efficiency of burning by increasing its contact area exposed to fire in the burner as compared to solid coal.
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This coal dust is fed through a blower in the boiler; The thermal energy released from this fuel is used to boil water up to 1000 degrees Fahrenheit, thus converting it into high-pressure steam that is transferred to turbines. This energy is used to generate electricity through a generator.
Due to such high RPM, the voltage output of the generator is approximately 24000 volts, which can be transferred to about 40,000 volts via transmission cables. The steam is expanded one by one in 3 consecutive turbines to take full advantage of the pressure energy.
These turbines actually turn at high RPMs, which convert pressure energy into mechanical energy. The temperature of thises water is kept under a safe range so that it does not harm the aquatic lives of the water body. Furthermore, to extract heat from this steam, the cold water of the reservoir or river is pumped into the condenser, and after heat exchange, it is pumped back into the water body.