How does a Thermal Power Plant Works

Thermal Power Plant:

  • A thermal power station is a power plant in which the prime mover is steam driven.
  • Water is heated, turns into steam and spins a steam turbine which drives an electrical generator.
  • After it passes through the turbine, the steam is condensed in a condenser and recycled to where it was heated.
  • The greatest variation in the design of thermal power stations is due to the different fuel sources.

Energy Conversion Process in Thermal Power Plants

Energy Conversion Process Thermal Power Plants

Energy Conversion:
  • Fuel, Air and water produce steam in the boiler by combustion.
  • Steam of high temperature and pressure is expended from high pressure to low pressure in the turbine
  • Thermal energy is converted into kinetic energy and finally mechanical energy.
  • This mechanical energy derives the generator to produce electricity.

Advantages of Thermal Power Plant:

  • Fuel is cheaper
  • Less space is required 
  • The initial cost is less 
  • Plant can be located near the load center 
  • Turbine can work at 25% overload continuously 
  • A portion of steam can be used in various industries

Disadvantages of Thermal/Steam Power Plant:

  • Maintenance and operating costs are high 
  • Pollution of atmosphere is one of the major problems 
  • Water is required in huge quantity 
  • Handling of coal and disposal of ash are difficult tasks 
  • It requires long time for installation 
  • Efficiency falls quickly below 75%

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