A SEMINAR ON SUMMER VOCATIONAL TRAINING

BY: DHEERAJ PATHAK

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List of content :1. About NTPC2. Coal to Electricity 3. Layout of Thermal Power Plant4. Main Equipment of Power Plant5. C&I Labs6. Thermal Power Plant in Rajasthan7. Conclusion8. References

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NTPC-The Power Giant Formally known as National Thermal Power Corporation Ltd.

Established in Nov’1975.

Arup Roy Choudhury is chairman and MD.

Installed Capacity 43,128 MW.

Projects 17coal based , 7 gas based & 9 in JVs.

Planned capacity 75,000 MW by 2017.

With only 19.24 % of the all India installed capacity, it generates about 26.7 % of power.

Annual turnover of Rs. 73,904 cr. with profit of Rs. 13,834 Cr. for the year 2013-14.

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Coal to Electricity ….. Basics

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Why Coal?

Share of Coal in Power Generation

Advantages of Coal Fuel

•Abundantly available in India

•Low cost

•Technology for Power Generation well developed.

•Easy to handle, transport, store and use

•India’s Coal Reserves are estimated to be 206 billion tones. Present consumption is about 450 million tones.

•Cost of coal for producing 1 unit of electricity is Rs 0.75.

•Cost of Gas for producing 1 unit of electricity is Rs 1.20.

Coal

55%

Gas

10%

Diesel

1%

Hydel

26%

RES

5%

Nuclear

3%

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General Layout of Thermal Power Plant

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Main Equipments of Power Plant1. Coal handling plant2. Pulverizing plant4. Boiler5. Turbine6. Generator7. Condenser 8. Ash handling plant

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Coal handling plant

•The function of coal handling plant is automatic feeding of coal to the boiler • A thermal power plant burns enormous amounts of coal.

•A 200MW plant may require around 2000 tons of coal daily.

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Pulverizing plant

In modern thermal power plant , coal is pulverized i.e. ground to dust like size and carried to the furnace in a stream of hot air.

Pulverizing is done in pulverizing mill.

Pulverizing mill is further classified in three parts: Contact mill Ball mill Impact mill

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Boiler

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Turbine

A turbine is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful work. 

It consists one moving part called a rotor assembly.

Steam turbines are used for the generation of electricity in thermal power plants.

In thermal power plant turbine is sub divided in three parts:

HPT IPT LPT

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Generator An electric generator is a device that

converts mechanical energy to electrical energy. 

It is based upon the principle of electromagnetic induction.

the magnitude of EMF generates by generator is given by:

E=4.44φFN volts

Generators provide nearly all of the power for electric power grids.

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Condenser

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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.

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C&I LabsLabs Monitored parameter

1. Manometry Lab2. Protection and Interlocks

Lab3. Automation Lab4. Electronics Lab5. Water Treatment Lab6. Furnaces Safety

Supervisory System Lab

1. Speed

2. Temperature

3. Current

4. Voltage

5. Pressure

6. Flow of Gases

7. Vibration

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Conclusion

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Thermal power plants in RAJASTHAN

Chhabra thermal power plant- 500MW

Kota super thermal power plant- 1240MW

Giral lignite power plant- 235MW

Suratgarh super thermal power plant -1500MW

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References http://www.ntpc.co.in/

http://en.wikipedia.org/wiki/NTPC_Limited

http://en.wikipedia.org/wiki/Steam_turbine

http://en.wikipedia.org/wiki/Boiler_(power_generation)

http://www.asope.org/pdfs/AC_Electrical_Generators_ASOPE.pdf

http://geosci.uchicago.edu/~moyer/GEOS24705/Readings/ElectricityReading.pdf

Study material provided by NTPC-vindhyanchal

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Thank You!!