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TRAINING SEMINARTRAINING SEMINAR

ONON

135 MW GAS BASED POWER PLANT UTRAN,135 MW GAS BASED POWER PLANT UTRAN,

SURATSURAT

SUBMITTED BY:SUBMITTED BY:--

GANGWAL AKASH.GANGWAL AKASH.

BB--TECH(ECE)TECH(ECE)

IV YEAR,VII SEM.IV YEAR,VII SEM.

GIET, KOTAGIET, KOTA



CONTENTCONTENT

INTRODUCTIONINTRODUCTION

PRINCIPLEPRINCIPLE

ABOUT COMBINE CYCLE POWER PLANT(CCPP) ABOUT COMBINE CYCLE POWER PLANT(CCPP)

GAS BOOSTER COMPRESSOR(GBC)GAS BOOSTER COMPRESSOR(GBC)

GAS TURBINE(GT)GAS TURBINE(GT)

WASTE HEAT RECOVERY BOILER(WHRB)WASTE HEAT RECOVERY BOILER(WHRB)

STEAM TURBINE(ST)STEAM TURBINE(ST)

CONCLUSIONCONCLUSION



INTRODUCTIONINTRODUCTION

The Utran Gas Based Power Station is located onThe Utran Gas Based Power Station is located onthe bank of Tapi River near Surat.the bank of Tapi River near Surat.

It is a Gas Based Power Station.It is a Gas Based Power Station. There are twoThere are twoProjectsProjects CCPPCCPP 1 & CCPP1 & CCPP 2. In CCPP2. In CCPP 11there are three gas turbine units of 30 MW eachthere are three gas turbine units of 30 MW each

and one unit of 45 MW STG with a total installedand one unit of 45 MW STG with a total installedcapacity of 135 MW.capacity of 135 MW. In CCPPIn CCPP 2 , there is one GT of 228 MW & one2 , there is one GT of 228 MW & one

STG of 147 MW with a total installed capacity of STG of 147 MW with a total installed capacity of 375 MW. The units of CCPP375 MW. The units of CCPP--11 are of BHEL makeare of BHEL make

& the units of CCPP& the units of CCPP 2 are of ALSTOM make.2 are of ALSTOM make.



BASIC PRINCIPLEBASIC PRINCIPLE The gas based power plant work on principle of BRAYTON CYCLE.The gas based power plant work on principle of BRAYTON CYCLE.

The Brayton cycle Is the most idealized cycle for the simple gas turbine power plant atmosphericThe Brayton cycle Is the most idealized cycle for the simple gas turbine power plant atmosphericair is Compressed from p1 to p2 in compressor and deliver to the combustion chamber whereair is Compressed from p1 to p2 in compressor and deliver to the combustion chamber wherefuel is injected & burned. The combustion process occurs nearly at constant pressure due tofuel is injected & burned. The combustion process occurs nearly at constant pressure due tocombustion heat is added to the working fluid from t2 to t3.combustion heat is added to the working fluid from t2 to t3.



COMBINE CYCLYLE POWER PLANT(CCPP)COMBINE CYCLYLE POWER PLANT(CCPP)

The gas turbine power plant can be any of following typeThe gas turbine power plant can be any of following type

1.1. Simple cycle gas turbineSimple cycle gas turbine

2.2. Combined cycle gas turbineCombined cycle gas turbine

SIMPLE CYCLESIMPLE CYCLEThis power plant is based on brayton cycle.in this type, air isThis power plant is based on brayton cycle.in this type, air iscompressed to a higher pressure with the help of compressor andcompressed to a higher pressure with the help of compressor andfiring fuel,which may be natural gas.then air is expanded infiring fuel,which may be natural gas.then air is expanded inturbine. After driving gas turbine exhaust gas is diverted directlyturbine. After driving gas turbine exhaust gas is diverted directly

to atmosphereto atmosphere..



SIMPLE CYCLESIMPLE CYCLE



COMBINE CYCLECOMBINE CYCLE It is combination of the simple brayton cycle gas turbine and theIt is combination of the simple brayton cycle gas turbine and the

rankine cyclerankine cycle Gas turbine operates on brayton cycle while steam turbine operatesGas turbine operates on brayton cycle while steam turbine operates

on rankine cycle principle. This system is used for improving plant on rankine cycle principle. This system is used for improving plant efficiency. The power plant, which works in combined cycle , isefficiency. The power plant, which works in combined cycle , is

called CCPPcalled CCPP The exhaust of gas turbine whose temperature is in order of 550*CThe exhaust of gas turbine whose temperature is in order of 550*C--600*C is led to HRSG (heat recovery steam generator) to generate600*C is led to HRSG (heat recovery steam generator) to generatesteam. thus, heat of gas turbine in turn drives steam turbine.steam. thus, heat of gas turbine in turn drives steam turbine.

Combine cycle power plant has the wellCombine cycle power plant has the well--known advantage of known advantage of simpllicity as well as quick start and load change capability.simpllicity as well as quick start and load change capability.



COMBINE CYCLE PLANTCOMBINE CYCLE PLANT



GAS BOOSTER COMPRESSORGAS BOOSTER COMPRESSOR

Natural gas available at 8kg/cm2 atmospheric pressureNatural gas available at 8kg/cm2 atmospheric pressurefrom the GAIL is used as fuel for gas turbine since gasfrom the GAIL is used as fuel for gas turbine since gasturbine requires at 20 to 23 atmospheric pressure at GTturbine requires at 20 to 23 atmospheric pressure at GTinlet inlet

The centrifugal compressor are considered as workingThe centrifugal compressor are considered as working

The electric motor drives the centrifugal compressorThe electric motor drives the centrifugal compressorthrough a step up gearbox since the motor runs at 3000through a step up gearbox since the motor runs at 3000rpm and compressor speed is 14600rpm.rpm and compressor speed is 14600rpm.



GAS TURBINEGAS TURBINE The basic gas turbine components.The basic gas turbine components.1. Compressor1. Compressor2. Combustion chamber2. Combustion chamber

3. Turbine3. Turbineoverall efficiency of the plants depend on its componentsoverall efficiency of the plants depend on its componentsefficiencies.efficiencies.



COMPRESSOR:COMPRESSOR:--

The compressor consist of 17 stage of rotor and stator blading, and the exit guide vanes.The compressor consist of 17 stage of rotor and stator blading, and the exit guide vanes.the air is compressed in stage by series of alternate rotating rotor. And the statorthe air is compressed in stage by series of alternate rotating rotor. And the statorblades guide the air so that it enters in the rotor stage at proper angle.the turbine shaft blades guide the air so that it enters in the rotor stage at proper angle.the turbine shaft

is run at high speed ranging from about 6000rpm to 8000rpm.is run at high speed ranging from about 6000rpm to 8000rpm.

COMBUSTION:_COMBUSTION:_

In combustion section 10 combustion chamber having flame detector, fuel nozzles andIn combustion section 10 combustion chamber having flame detector, fuel nozzles andspark plug igniters are part of total system. Hot gases generated from the burning fuelsspark plug igniters are part of total system. Hot gases generated from the burning fuelsin the combustion chambers are used in driving the turbine.in the combustion chambers are used in driving the turbine.

TURBINE:TURBINE:--

Turbine is 1 to 1.5meter section of gas turbine. Now fuel gases passes through rotor bladesTurbine is 1 to 1.5meter section of gas turbine. Now fuel gases passes through rotor bladesof the turbine and rotates the turbine. Turbine speed is 5100rpm.turbine has threeof the turbine and rotates the turbine. Turbine speed is 5100rpm.turbine has threestage. Then the shaft is connected with generator.stage. Then the shaft is connected with generator.



GENERATOR:GENERATOR:> The generator is the main part, which converts the mechanical> The generator is the main part, which converts the mechanical

motion into electric current. Here field is generated using an exciter.motion into electric current. Here field is generated using an exciter.> In an exciter, a voltage of 200v is given to the stator part, which> In an exciter, a voltage of 200v is given to the stator part, which

produces a stationary magnetic field, and the rotor, which containsproduces a stationary magnetic field, and the rotor, which containsthe coils, surrounds the stator. due to rotor motion, it induces athe coils, surrounds the stator. due to rotor motion, it induces avarying magnetic field. The stator of generator consist of coil invarying magnetic field. The stator of generator consist of coil inwhich voltage is induced on the movement of rotor. This inducedwhich voltage is induced on the movement of rotor. This inducedvoltage is then taken out and given to the transformer.voltage is then taken out and given to the transformer.



WHRB(WAST HEAT RECOVERY BOILER)WHRB(WAST HEAT RECOVERY BOILER)

It is boiler which is unfired and heated byIt is boiler which is unfired and heated by

exhaust gases at the outlet of turbine andexhaust gases at the outlet of turbine andentrance of the boiler where the maximumentrance of the boiler where the maximumtemperature is available steam istemperature is available steam is

superheated. At last the gases have verysuperheated. At last the gases have verylow temperature (about 145c)wherelow temperature (about 145c)wherecondensed water is preheated.condensed water is preheated.



STEAM TURBINESTEAM TURBINE

>> The steam turbine is yet another important part of gas>> The steam turbine is yet another important part of gaspower plant. With the use of boiler and then steampower plant. With the use of boiler and then steam

turbine makes the plant efficiency better.turbine makes the plant efficiency better.>> The out put of steam turbine is 45 MW>> The out put of steam turbine is 45 MW



CONCLUSIONCONCLUSION

>> The gas based combine cycle power plant is more>> The gas based combine cycle power plant is moreefficient and cheaper than the open cycle gas basedefficient and cheaper than the open cycle gas basedpower plant.power plant.

>> the gas based power plant are quick to start i.e.>> the gas based power plant are quick to start i.e.approximately 20 min as compared to thermal powerapproximately 20 min as compared to thermal powerplant.plant.

>> waste heat of exhaust gases can be utilised to>> waste heat of exhaust gases can be utilised togenerate the power at UTRAN power station.generate the power at UTRAN power station.

>> gas based power plant are environment friendly.>> gas based power plant are environment friendly.>> overall efficiency of the plant is much higher than the>> overall efficiency of the plant is much higher than the

other plants i.e. 48% to 52%.other plants i.e. 48% to 52%.

gangwal akash

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