A thermal power plant converts the heat energy of coal into electrical energy. Coal is burnt in a boiler to produce steam which drives a steam turbine connected to a generator. Thermal power plants provide the majority of electricity in India. The key components of a thermal power plant include the coal handling system, pulverizers, draft fans, boiler, turbine, condenser, cooling towers, feedwater heaters and others. Thermal power has advantages of using cheap fuel and low initial costs but has disadvantages of polluting the atmosphere. Large thermal power plants in Gujarat include Mundra, Wanakbori and Ukai.
The Thermal Power Station burns fuel & uses the resultant to make the steam, which derives the turbo generator. The Fuel i.e. coal is burnt in pulverized from. The pressure energy of the steam produce is converted into mechanical energy with the help of turbine. The mechanical energy is fed to the generator where the magnet rotate inside a set of stator winding & thus electricity is produced in India 65% of total power is generated by thermal power stations. To understand the working of the Thermal Power Station plant, we can divide the whole process into following parts.
This presentations contains the basic layout of a thermal power palnt along with the components.Coal and it's types.Future of thermal power plant in India.
The Thermal Power Station burns fuel & uses the resultant to make the steam, which derives the turbo generator. The Fuel i.e. coal is burnt in pulverized from. The pressure energy of the steam produce is converted into mechanical energy with the help of turbine. The mechanical energy is fed to the generator where the magnet rotate inside a set of stator winding & thus electricity is produced in India 65% of total power is generated by thermal power stations. To understand the working of the Thermal Power Station plant, we can divide the whole process into following parts.
This presentations contains the basic layout of a thermal power palnt along with the components.Coal and it's types.Future of thermal power plant in India.
This PPT contains introduction and types of thermal power plants, WORKING PRINCIPLE, LAYOUT AND WORKING OF NUCLEAR POWER PLANT, WORKING PRINCIPLE OF COAL BASED POWER PLANT, SITE SELECTION OF THERMAL POWER PLANT,GENERAL LAYOUT AND WORKING OF COAL BASED THERMAL POWER PLANT, PRESENT STATUS OF COAL-FIRED THERMAL POWER PLANT, WASTE GENERATED IN THERMAL POWER PLANTS AND MANAGEMENT , TREATMENT AND DISPOSAL OF WASTE GENERATED IN THERMAL POWER PLANTS.
Thermal Power Plant - Full Detail About Plant and Parts (Also Contain Animate...Shubham Thakur
A thermal power station is a power plant in which the prime mover is steam driven. Water is heated, turns into steam and spins a steam turbine which drives an electrical generator. After it passes through the turbine, the steam is condensed in a condenser and recycled to where it was heated; this is known as a Rankine cycle. The greatest variation in the design of thermal power stations is due to the different fossil fuel resources generally used to heat the water. Some prefer to use the term energy center because such facilities convert forms of heat energy into electrical energy.[1] Certain thermal power plants also are designed to produce heat energy for industrial purposes of district heating, or desalination of water, in addition to generating electrical power. Globally, fossil fueled thermal power plants produce a large part of man-made CO2 emissions to the atmosphere, and efforts to reduce these are varied and widespread.
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introduction to thermal powerplant,type of thermal powerplant,captive powerplant,rankin cycle,co-generation powerplant,subcritical powerplant,supercritical powerplant,theory of operation,working principle,parts of powerplant,boiler,turbine,etc
This PPT contains introduction and types of thermal power plants, WORKING PRINCIPLE, LAYOUT AND WORKING OF NUCLEAR POWER PLANT, WORKING PRINCIPLE OF COAL BASED POWER PLANT, SITE SELECTION OF THERMAL POWER PLANT,GENERAL LAYOUT AND WORKING OF COAL BASED THERMAL POWER PLANT, PRESENT STATUS OF COAL-FIRED THERMAL POWER PLANT, WASTE GENERATED IN THERMAL POWER PLANTS AND MANAGEMENT , TREATMENT AND DISPOSAL OF WASTE GENERATED IN THERMAL POWER PLANTS.
Thermal Power Plant - Full Detail About Plant and Parts (Also Contain Animate...Shubham Thakur
A thermal power station is a power plant in which the prime mover is steam driven. Water is heated, turns into steam and spins a steam turbine which drives an electrical generator. After it passes through the turbine, the steam is condensed in a condenser and recycled to where it was heated; this is known as a Rankine cycle. The greatest variation in the design of thermal power stations is due to the different fossil fuel resources generally used to heat the water. Some prefer to use the term energy center because such facilities convert forms of heat energy into electrical energy.[1] Certain thermal power plants also are designed to produce heat energy for industrial purposes of district heating, or desalination of water, in addition to generating electrical power. Globally, fossil fueled thermal power plants produce a large part of man-made CO2 emissions to the atmosphere, and efforts to reduce these are varied and widespread.
For Video on Themal Power Plant (Animated Working Video) :- https://www.youtube.com/watch?v=ouWOhk1INjo
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introduction to thermal powerplant,type of thermal powerplant,captive powerplant,rankin cycle,co-generation powerplant,subcritical powerplant,supercritical powerplant,theory of operation,working principle,parts of powerplant,boiler,turbine,etc
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1. PREPARED BY:
VIREN PATEL ENROLL NO-130280109087
THERMAL
POWER PLANT
ELECTRICAL ENGINEERING
DEPARTMENT
AHMEDABAD
2. INTRODUCTION
A Thermal Power Plant converts the heat energy of coal into
electrical energy. Coal is burnt in a boiler which converts water
into steam. The expansion of steam in turbine produces
mechanical power which drives the alternator coupled to the
turbine.Thermal Power Plants contribute maximum to the
generation of Power for any country . Thermal Power Plants
constitute 75.43% of the total installed captive and non-captive
power generation in India . In thermal generating stations coal,
oil, natural gas etc. are employed as primary sources of energy.
4. 1. Cooling tower 10. Steam Control valve 19. Superheater
2. Cooling water pump 11. High pressure steam turbine 20. Forced draught (draft) fan
3. transmission line (3-phase) 12. Deaerator 21. Reheater
4. Step-up transformer (3-phase) 13. Feed water heater 22. Combustion air intake
5. Electrical generator (3-phase)14. Coal conveyor 23. Economiser
6. Low pressure steam turbine 15. Coal hopper 24. Air preheater
7. Condensate pump 16. Coal pulveriser 25. Precipitator
8. Surface condenser 17. Boiler steam drum 26. Induced draught (draft) fan
9. Intermediate pressure steam
turbine
18. Bottom ash hopper 27. Flue gas stack
Diagram of a typical coal-fired
thermal power station
5. 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
6. Coal handling plant
•The function of coal handling plant is automatic feeding of coal to the
boiler furnace.
• A thermal power plant burns enormous amounts of coal.
•A 200MW plant may require around 2000 tons of coal daily
7. Pulverising plant
In modern thermal power plant , coal is pulverised
i.e. ground to dust like size and carried to the
furnace in a stream of hot air. Pulverising is a
means of exposing a large surface area to the action
of oxygen and consequently helping combustion.
Pulverising mills are further classified as:
1. Contact mill
2. Ball mill
3. Impact mill
8. Draft system
• The circulation of air is
caused by a difference in
pressure, known as Draft.
• Draft is a differential
pressure b/w atmosphere and
inside the boiler.
• It is necessary to cause the
flow of gases through boiler
setting
• It may be –
1. Natural draft
2. Mechanical draft
9. Boiler
• A boiler or steam generator is a closed vessel in which water
under pressure, is converted into steam.
• It is one of the major components of a thermal power plant
• Always designed to absorb maximum amount of heat released in
the process of combustion
Boilers are of two types-
1. Fire tube boiler
2. Water tube boiler
10. Superheater and reheater
Most of the modern boilers are having super heater and reheater arrangement.
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. The amount
of superheat added to the steam is influenced by the location, arrangement, and
amount of super heater surface installed, as well as the rating of the boiler. The
super heater may consist of one or more stages of tube banks arranged to
effectively transfer heat from the products of combustion. Super heaters are
classified as convection , radiant or combination of these.
11. Reheater : Some of the heat of superheated steam is used to rotate the
turbine where it loses some of its energy. Reheater is also steam boiler
component in which heat is added to this intermediate-pressure steam,
which has given up some of its energy in expansion through the high-
pressure turbine. The steam after reheating is used to rotate the second
steam turbine where the heat is converted to mechanical energy. This
mechanical energy is used to run the alternator, which is coupled to turbine
, there by generating electrical energy.
12. Steam turbine
A steam turbine converts heat energy of steam into mechanical energy
and drives the generator. It uses the principle that steam when issuing
from a small opening attains a high velocity. This velocity attained during
expansion depends on the initial and final heat content of the steam. This
difference b/w initial and final heat content repesents the heat energy
converted into kinetic energy.
These are of two types :-
Impulse turbine
Reaction turbine
13. 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 carry ash to
dump sites directly or for carrying and loading it to trucks and
wagons which transport it to the site of disposal
14. Condenser
Steam after rotating steam turbine comes to condenser. Condenser
refers here to the shell and tube heat exchanger (or surface
condenser) installed at the outlet of every steam turbine in Thermal
power stations of utility companies generally.
These condensers are heat exchangers which convert steam from its
gaseous to its liquid state, also known as phase transition.
In so doing, the latent heat of steam is given out inside the
condenser. Where water is in short supply an air cooled condenser is
often used.
An air cooled condenser is however significantly more expensive and
cannot achieve as low a steam turbine backpressure (and therefore
less efficient) as a surface condenser.
The purpose is to condense the outlet (or exhaust) steam from steam
turbine to obtain maximum efficiency and also to get the condensed
steam in the form of pure water, otherwise known as condensate, back
to steam generator or (boiler) as boiler feed water.
15.
16. Cooling towers and ponds
o A condenser needs huge quantity of water to condense the steam .
o Typically a 2000MW plant needs about 1500MGallon of water.
oMost plants use a closed cooling system where warm water coming from
condenser is cooled and reused
oSmall plants use spray ponds and medium and large plants use cooling towers.
oCooling tower is a steel or concrete hyperbolic structure having a reservoir at the
base for storage of cooled water
oHeight of the cooling tower may be 150 m or so and diameter at the base is 150 m
17. Feed water heater
Advantages of heating water before feeding back to the boiler:-
a) Feed water heating improves overall plant efficiency.
b) The dissolved oxygen and carbon dioxide which would otherwise
cause boiler corrosion are removed in feed water heater
c) Thermal stresses due to cold water entering the boiler drum are
avoided.
d) Quantity of steam produced by the boiler is increased.
e) Some other impurities carried by the steam and condensate, due
to corrosion of boiler and condenser are precipitated outside the
boiler.
18. Economiser
Flue gases coming out of the boiler carry lot of heat. An
economiser extracts a part of this heat from flue gases
and uses it for heating feed water. This use of
economiser results in saving coal consumption and
higher boiler efficiency
19. Air preheater
After flue gases leave economiser, some further heat
can be extracted from them and used to heat incoming
heat. Cooling of flue gases by 20 degree centigrade
increases the plant efficiency by 1%.
Air preheaters may be of three types
Plate type
Tubular type
Regenerative type
20. Advantages
(i) The fuel (i.e., coal) used is quite cheap.
(ii) Less initial cost as compared to other generating stations.
(iii) It can be installed at any place irrespective of the existence of coal.
The coal can be transported to the site of the plant by rail or road.
(iv) It requires less space as compared to the hydroelectric power station.
(v) The cost of generation is lesser than that of the diesel power station
Disadvantages
(i) It pollutes the atmosphere due to the production of large amount of
smoke and fumes
Advantages & Disadvantages of thermal power
plant
21. Thermal power plants in GUJARAT
1. Mundra ultra mega power plant(ADANI)- 4620MW
2. Mundra ultra mega power plant(TATA)- 4000MW
3. Wanakbori- 1470MW
4. Gandhinagar- 870MW
5. Ukai- 850MW
6. Dhuvaran - 534MW
7. Sabarmati - 400MW