Program: Diploma in Mechanical Engineering (Semester: 5) Course: Power Plant Engineering Lecture 8 Unit 3: Steam and Gas Power Plants 3.1 Steam Power Plants -Introduction -Layout and Components -Working -Adv. & Disadvantages Presented by : Prof. Rushikesh Sonar, Sandip Polytechnic, Nashik

1. Program: Diploma (Mechanical)
Class: TY (ME) Semester: V
Course: Power Plant Engineering
Code: 22566
LECTURE 08:LECTURE 08:
Unit: 3. Steam & Gas Power Plants

2. 02
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Name of theName of theName of theName of the Trainer : Prof. Rushikesh Deoram SonarTrainer : Prof. Rushikesh Deoram SonarTrainer : Prof. Rushikesh Deoram SonarTrainer : Prof. Rushikesh Deoram Sonar
Years ofYears ofYears ofYears of Experience : 10Experience : 10Experience : 10Experience : 10
DomainDomainDomainDomain Expertise : Mechanical EngineeringExpertise : Mechanical EngineeringExpertise : Mechanical EngineeringExpertise : Mechanical Engineering
Qualification: M.E. (Design Engineering)Qualification: M.E. (Design Engineering)Qualification: M.E. (Design Engineering)Qualification: M.E. (Design Engineering)
Contact Details:Contact Details:Contact Details:Contact Details:
+91 9890481959+91 9890481959+91 9890481959+91 9890481959
rushikesh.sonar@sandippolytechnic.orgrushikesh.sonar@sandippolytechnic.orgrushikesh.sonar@sandippolytechnic.orgrushikesh.sonar@sandippolytechnic.org

3. 03Unit III: Steam & Gas Power Plants
TOPICS COVERED IN PREVIOUS LECTURE:
2.4.4 Control System in FBC Boilers2.4.4 Control System in FBC Boilers2.4.4 Control System in FBC Boilers2.4.4 Control System in FBC Boilers
2.5 Comparison between various Boilers2.5 Comparison between various Boilers2.5 Comparison between various Boilers2.5 Comparison between various Boilers
2.6 Indian Boiler Regulation (IBR) Act2.6 Indian Boiler Regulation (IBR) Act2.6 Indian Boiler Regulation (IBR) Act2.6 Indian Boiler Regulation (IBR) Act
2.7 Maintenance of High Pressure Boilers2.7 Maintenance of High Pressure Boilers2.7 Maintenance of High Pressure Boilers2.7 Maintenance of High Pressure Boilers
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TOPICS TO BE COVERED IN THIS LECTURE:
3.1 Steam Power Plants3.1 Steam Power Plants3.1 Steam Power Plants3.1 Steam Power Plants
* Introduction* Introduction* Introduction* Introduction
* Layout and Components* Layout and Components* Layout and Components* Layout and Components
* Working* Working* Working* Working
* Adv. & Disadvantages* Adv. & Disadvantages* Adv. & Disadvantages* Adv. & Disadvantages

4. 04Unit III: Steam & Gas Power Plants
UNIT OUTCOMES (OUs)
3a. Explain with sketches the given Fuel Handling System.
3b. Identify the various elements of Steam Power Plant & its control system.
3c. Explain with sketches the given control system of Steam Power Plant.
3d. Identify the various components of Gas Power Plant.
3e. Explain preventive maintenance of major components of the given turbine power plant.
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3e. Explain preventive maintenance of major components of the given turbine power plant.
3f. Explain predictive maintenance of major components of the given turbine power plant.

5. 05Unit III: Steam & Gas Power Plants
3.1.1 : STEAM POWER PLANT: INTRODUCTION
A generating station which converts heat energy of coal combustion into electrical energy is known as a steam power
station. It can also be called as the thermal power station or thermal power generating plant.
A steam power station basically works on the Rankine cycle.
Steam is produced in the boiler by utilizing the heat of coal combustion.
The steam is then expanded in the prime mover (i.e. steam turbine) and is condensed in a condenser to be fed
into the boiler again.
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into the boiler again.
The steam turbine drives the alternator which converts mechanical energy of the turbine into electrical energy.
This type of power station is suitable where coal and water are available in abundance and a large amount of
electric power is to be generated.

6. 06Unit III: Steam & Gas Power Plants
3.1.2 : STEAM POWER PLANT: LAYOUT
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7. 07Unit III: Steam & Gas Power Plants
3.1.2 : STEAM POWER PLANT: LAYOUT
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8. 08Unit III: Steam & Gas Power Plants
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9. 09Unit III: Steam & Gas Power Plants
3.1.3 : STEAM POWER PLANT: MAJOR COMPONENTS
Coal Storage: It is the place where coal is stored which can be utilized when required.
Coal Handling: Here the coal is converted into the pulverized form before feeding to the furnace. A proper
system is designed to transport the pulverized coal to the boiler furnace.
Boiler: It converts the water into high pressure steam. It contains the furnace inside or outside the boiler shell.
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Boiler: It converts the water into high pressure steam. It contains the furnace inside or outside the boiler shell.
The combustion of coal takes place in the furnace.
Air-preheater: It is used to pre-heat the air before entering into the boiler furnace. The pre heating of air helps in
the burning of fuel to a greater extent. It takes the heat from the burnt gases from the furnace to heat the air
from the atmosphere.

10. 10Unit III: Steam & Gas Power Plants
3.1.3 : STEAM POWER PLANT: MAJOR COMPONENTS
Economizer: As its name indicates it economizes the working of the boiler. It heats the feed water to a specified
temperature before it enters into the boiler drum. It takes the heat from the burnt gases from the furnace to do
so.
Turbine: It is the mechanical device which converts the kinetic energy of the steam to the mechanical energy.
Generator: It is coupled with the turbine rotor and converts the mechanical energy of the turbine to the electrical
energy.
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energy.
Ash Storage: It is used to store the ash after burning of the coal.
Dust Collector: It collects the dust particle from the burnt gases before it is released to the chimney

11. 11Unit III: Steam & Gas Power Plants
3.1.3 : STEAM POWER PLANT: MAJOR COMPONENTS
Condenser: It condensate the steam that leaves out turbine. It converts the low pressure steam to water. It is
attached to the cooling tower
Cooling Tower: It is a tower which contains cold water. Cold water is circulates to the condenser for the cooling
of the residual steam from the turbine.
Chimney: It is used to release the hot burnt gases or smoke from the furnace to the environment at appropriate
height. The height of the tower is very high such that it can easily throw the smoke and exhaust gases at the
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Chimney: It is used to release the hot burnt gases or smoke from the furnace to the environment at appropriate
height. The height of the tower is very high such that it can easily throw the smoke and exhaust gases at the
appropriate height. And it cannot affect the population living near the steam power plant.
Feed Water Pump: It is used to transport the feed water to the boiler.

12. 12Unit III: Steam & Gas Power Plants
3.1.4 : STEAM POWER PLANT: WORKING
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13. 13Unit III: Steam & Gas Power Plants
3.1.4 : STEAM POWER PLANT: PATH OF FLOW
FURNACE SUPER HEATER ECONOMIZER
AIR PRE-
HEATER
CHIMNEY ATMOSPHERE
STEAM FLOW
FLUE GASES
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BOILER SUPER HEATER TURBINE
CONDENSER
(Wet Steam)
ECONOMIZER
(Feed Water)
BOILER
STEAM FLOW

14. 14Unit III: Steam & Gas Power Plants
3.1.5 : STEAM POWER PLANT: ADVANTAGES
Coal is cheaper than petrol and
diesel fuel, hence power generation
cost is economical.Low Initial Cost And Hence
Economical.
This power plant has low
maintenance cost.
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Steam power plant can be installed in any area
where water sources and transportation facility
are easily available.
maintenance cost.
Less land area is required

15. 15Unit III: Steam & Gas Power Plants
3.1.5 : STEAM POWER PLANT: DISADVANTAGES
Overall efficiency of steam power
plant is about 35 % to 41% which
is low.
The running cost of is
comparatively high because of
fuel, maintenance etc
The heated water that is thrown in
the rivers, ponds etc puts andDue to the release of burnt gases
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Disturbs The Ecology.
the rivers, ponds etc puts and
adverse effect on the living
organism of water
Due to the release of burnt gases
of the coal or fuel, it pollutes the
air.

16. 16Unit III: Steam & Gas Power Plants
In this lesson, We have learnedIn this lesson, We have learnedIn this lesson, We have learnedIn this lesson, We have learned
Steam Power Plants: Introduction
Layout, Major components and its Working
SUMMARY
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Layout, Major components and its Working
Advantages and Disadvantages of Steam Power Plants

17. 17Unit III: Steam & Gas Power Plants
Our Next Video Lecture Topic
3.2: FUEL HANDLING SYSTEMS IN STEAM POWER PLANTS
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