Thermal power plant(what?,how?,why?,problem.)

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in India mostly power is generated by the thermal power plant.

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Thermal power plant(what?,how?,why?,problem.)

  1. 1. Thermal Power Plant What? How? Why? Problems?
  2. 2. Contain • What is it? • How it works? • Why this ? • Problems with Thermal Power Plant
  3. 3. What? • Thermal Power Plant is generate electricity by converting thermal energy(chemical energy of coal ) into electric energy. It use coal as fuel.
  4. 4. • Generally it works on modify Rankine cycle. • Chemical energy of coal is converted into heat by burning How ?
  5. 5. • This heat is used to convert water in to steam • This high pressure steam drive the turbine and turbine drive generator
  6. 6. Main and Auxiliary equipments 1. Coal handling plant 2. Pulverizing plant 3. Draft fans 4. Boiler 5. Ash handling plant 6. Turbine 7. Condenser 8. Cooling towers and ponds 9. Feed water heater 10. Economiser 11. Superheater and Reheater 12. Air preheater
  7. 7. Layout of Thermal Power Station
  8. 8. Boiler • Where fuel is burnt and produce heat . • This heat is used to convert water into steam • Types water tube fire tube
  9. 9. Superheater : • Superheater is a component of a steam- generating unit in which steam, after it has left the boiler drum, is heated above its saturation temperature
  10. 10. Economizer • An economizer extracts a part of this heat from flue gases and uses it for heating feed water
  11. 11. Air Preheater • After flue gases leave economiser, some further heat can be extracted from them and used to heat incoming heat • three types Plate type Tubular type Regenerative type
  12. 12. Ash Handling Plant • The percentage of ash in coal varies from 5% in good quality coal to about 40% in poor quality coal • Power plants generally use poor quality of coal , thus amount of ash produced by it is pretty large • A modern 2000MW plant produces about 5000 tons of ash daily • The stations use some conveyor arrangement to dispose the ash .
  13. 13. Ash Handling Plant
  14. 14. Turbine • heat energy of steam into mechanical energy and drives the generator • Convert pressure energy to kinetics energy • types :- Impulse turbine Reaction turbine
  15. 15. Turbine
  16. 16. Generator • electrical device • Convert mechanical energy into electrical energy • Works on electromagnetic induction • It connected to the turbine
  17. 17. Condenser • Steam after rotating steam turbine comes to • convert steam from its gaseous to its liquid state • are heat exchangers • Tyes air cooling water cooling force cooling nature cooling
  18. 18. Condenser
  19. 19. Cooling tower • Most plants use a closed cooling system where warm water coming from condenser is cooled and reused • Height 150 m • diameter at the base is 150 m • hyperbolic structure • Made of steel or concrete
  20. 20. Cooling towers
  21. 21. Advantages of Thermal Power Plant • No problem of waste disposal • Thermal Power Plant can be located near the load centre if water source available near the site • They can quickly against change of load without difficultly • A portion of steam generated can be used as a process steam in different industries. • The steam turbines can work under 25% of overload continuously • Less space is require compared to hydro electric Power Plants
  22. 22. Disadvantages of Thermal Power Plant • Thermal Power Plant requires large quantity of water for boiler and condenser • It has a very high operating cost compare to hydro and nuclear Power Plants. • In thermal Power Plant there is great difficulty experienced in coal handling • Less efficient as compare to the nuclear Power Plants
  23. 23. Power generated in 2010 in MW Caol Gas Hydro Nuclear Renewable (energy)total INDIA 82095.88 17055 36885 4120 15427 156784 GUJARAT 6678.89 3894 772 559.32 1643.9 13566 MAHRASTRA 10703 3716 3332 690 2428 20868
  24. 24. Thanks you All the best

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