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In India 75% of total power is generated by the

Thermal Power Stations . Because of availability

of coal.

Chhabra Thermal Power Project is a project of

Rajasthan Rajya Vidyut Utpadan Nigam(RRVUNL).

It is situated at village Motipura Chowaki In Baran.

Its total capacity is 500 MW as at present with

two units working with capacity.

Having two unit of 2 x 250 MW = 500 MW, two

units of 2 x 250 MW are under construction ,two

supercritical units of 2 x 660 MW and two gas

based units of capacity 2 x 110 MW are

purposed for future.

1. BOILER

2. TURBINES (HP,IPLP)

3. GENERATOR

4. CONDENSER

5. ELECTROSTATIC PRECIPITATOR

6. DEAERETOR

7. COAL MILLS

8. AIR-PREHEATORS

9. COOLING TOWERS

10. ID (Induced Draft) ,FD (Forced draft),PA (Primary Air) Fans

Boiler is an enclosed vessel in which water heated and circulated until the

water is turned in to steam at the required pressure.

What is a boiler?

In CTPS water tube boilers are used.

In these boilers water is inside the tubes

and hot gases are outside the tubes.

They consists of drums and tubes.

The steam produced in the boiler then

seperats from water in boiler drum.

The steam turbine itself is a device to convert the heat in steam to mechanical power. There are three turbines installed classified as HP(High Pressure Turbine) , IP( Intermediate pressure Turbine) and LP(Low Pressure Turbine) which are aligned in cascade form with each other as shown in below . Supersaturated Steam first enters in HPT and after work done in HPT its temperature and pressure decreased , so it again sent to re-heater (a part of boiler).In re-heater the steam again get super saturation (537 0C , 150 Kg/cm2 ) approx, then it pass through the IPT and in continuous manner pass through the LPT and give the rotor a mechanical thrust.

An electrical generator is a machine, which converts mechanical energy (or power) into electrical energy (or power). Energy conversion is based on the principal of the production of dynamically (or motionally) induced emf Whenever conductor cuts magnetic flux, dynamicallyinduced emf is produced in it according to Faraday’s Laws of electromagnetic induction. This emf causes a current to flow if the conductor circuit is closed.

In CTPS surface cooling type condersers are installed. The surface condenser is a shell and tube heat exchanger in which cooling water is circulated through the tubes. The exhaust steam from the low pressure turbine enters the shell where it is cooled and converted to condensate (water) by flowing over the tubes as shown in the adjacent diagram. Such condensers use steam ejectors or rotary motor-driven exhausters for continuous removal of air and gases from the steam side to maintain vacuum.

In electrostatic precipitator ash is subjected to pass through a passage in which high electrostatic charge of the order of 60 to 70 Kilo Volts exists. This highly electrostatically charged atmosphere ionises the ash particles and such electrically charged ash particles are attracted towards the positive electrodes of the system where they loose the electrical charge and fall down into the collecting hoppers placed below the collecting electrodes. This system is known as Electrostatic precipitator (ESP). Now a days ESP is commonly used in thermal power plant for fly ash separation.

The presence of certain non

condensable gases, principally

oxygen, carbon dioxide and ammonia,

dissolved in water is generally

considered harmful because of their

corrosive attack on attack on metals

particularly at elevated temperatures.

The deaerator used to remove the

these non-consensable gases

specially Oxygen from feed water.

In coal mills the coal

which is larger in size is

crushed and Pulverized.

After puverization the

coal lifted by primary air

and sent to furnace

through classifiers four

in each feeder.

An air preheater or air heater is a general term to describe any device designed to heat air before another process (for example, combustion in a boiler) with the primary objective of increasing the thermal efficiency of the process. The purpose of the air pre heater is to recover the heat from the boiler flue gas which increases the thermal efficiency of the boiler by reducing the useful heat lost in the flue gas.

Cooling towers are evaporative coolers used for cooling water or other working medium to near the ambient wet-bulb air temperature. Hot water comes from the condenser and evoparated by cooling tower by making contact it with atomospheric air and make it cool approx 10 0C.