Thermal power plants generate electricity through a Rankine cycle. Water is heated to produce steam that spins a turbine connected to a generator. The steam is then condensed and recycled. Variations include reheat cycles, which reheat steam between turbine stages to improve efficiency, and regenerative cycles, which use steam from turbines to preheat feedwater entering the boiler. The Rankine cycle is the most common thermodynamic cycle used in fossil fuel power plants due to practical considerations over the Carnot cycle. Modern plants can achieve over 40% efficiency using supercritical steam conditions above the water's critical point.
Power Plants and Basic Thermodynamic CyclesSalman Haider
Brief overview of different types of power plants and their basic thermodynamic cycles.
The content is of basic maturity.
Audience:
Students, teachers or to whom it may concern
References:
1. Gas Turbine Engineering Handbook – Meherwan P. Boyce 2nd Edition
2. Thermodynamics an Engineering Approach – Yunus A. Cengel
3. Internal Combustion Engines – G.W. Ganeson
4. https://en.wikipedia.org/wiki/Power_station
5. https://en.wikipedia.org/wiki/Fossil-fuel_power_station
Waste heat recovery, co geration and tri-generationAmol Kokare
Diploma in Mechanical Engg.
Babasaheb Phadtare Polytechnic, kalamb-walchandnagar
Sub- Power plant engineering
Unit-Waste heat recovery, co geration and tri-generation.
By- Prof. Kokare Amol Yashwant
A detailed explanation about Rankine cycle or vapour power cycle for mechanical 2nd year students.Areas of uses of vapour power cycle or steam power cycle.
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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Power Plants and Basic Thermodynamic CyclesSalman Haider
Brief overview of different types of power plants and their basic thermodynamic cycles.
The content is of basic maturity.
Audience:
Students, teachers or to whom it may concern
References:
1. Gas Turbine Engineering Handbook – Meherwan P. Boyce 2nd Edition
2. Thermodynamics an Engineering Approach – Yunus A. Cengel
3. Internal Combustion Engines – G.W. Ganeson
4. https://en.wikipedia.org/wiki/Power_station
5. https://en.wikipedia.org/wiki/Fossil-fuel_power_station
Waste heat recovery, co geration and tri-generationAmol Kokare
Diploma in Mechanical Engg.
Babasaheb Phadtare Polytechnic, kalamb-walchandnagar
Sub- Power plant engineering
Unit-Waste heat recovery, co geration and tri-generation.
By- Prof. Kokare Amol Yashwant
A detailed explanation about Rankine cycle or vapour power cycle for mechanical 2nd year students.Areas of uses of vapour power cycle or steam power cycle.
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
Subscribe To Our Youtube Channel For More Videos:-
https://www.youtube.com/TheEngineeringScienc
Click Here To Subscribe:-
http://www.youtube.com/user/TheEngineeringScienc?sub_confirmation=1
A steam turbine is a prime mover in which the potential energy of the steam is transformed into kinetic energy and later in its turn is transformed into the mechanical energy of rotation of the turbine shaft
INTRODUCTION
THERMODYNAMIC CYCLE OF STEAM FLOW
RANKINE CYCLE (IDEAL , ACTUAL ,REHEAT)
LAYOUT OF STEAM POWER PLANT
MAJOR COMPONENTS AND THEIR FUNCTIONS
ALTERNATOR
EXCITATION SYSTEM
GOVERNING SYSTEM
The Rankine cycle or Rankine Vapor Cycle is the process widely used by power plants such as coal-fired power plants or nuclear reactors. In this mechanism, a fuel is used to produce heat within a boiler, converting water into steam which then expands through a turbine producing useful work.
The steam-electric power station is a power station in which the electric generator is steam driven.
A steam turbine is a prime mover in which the potential energy of the steam is transformed into kinetic energy and later in its turn is transformed into the mechanical energy of rotation of the turbine shaft
INTRODUCTION
THERMODYNAMIC CYCLE OF STEAM FLOW
RANKINE CYCLE (IDEAL , ACTUAL ,REHEAT)
LAYOUT OF STEAM POWER PLANT
MAJOR COMPONENTS AND THEIR FUNCTIONS
ALTERNATOR
EXCITATION SYSTEM
GOVERNING SYSTEM
The Rankine cycle or Rankine Vapor Cycle is the process widely used by power plants such as coal-fired power plants or nuclear reactors. In this mechanism, a fuel is used to produce heat within a boiler, converting water into steam which then expands through a turbine producing useful work.
The steam-electric power station is a power station in which the electric generator is steam driven.
Learn what factors influence the compressed air system, why air compressors need servicing, what maintenance plans are available, and how can they help you optimize your compressed air system. Atlas Copco Compressors UK & Ireland offers Customer Support Plans for air compressor maintenance tailored to your specific compressed air installation and budget.
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Thermal Analysis of Steam Turbine Power PlantsIOSR Journals
: Steam are a major energy consumer. Optimising process operating conditions can considerably
improve turbine water rate, which in turn will significantly reduce energy requirement. Various operating
parameters affect condensing and back pressure turbine steam consumption and efficiency. The industrial
sector is the largest energy consumer, accounting for about 30 % of total energy used. Fuel and energy prices
are continuously rising. With the present trend of energy prices and scarcity of hydrocarbon resources lowering
energy requirement is a top priority. Energy conservation benefits depend on the adopting minor or major
modifications and using the latest technology. Turbines are designed for a particular operating conditions like
steam inlet pressure, steam inlet temperature and turbine exhaust pressure/ exhaust vacuum, which affects the
performance of the turbines in a significant way. Variations in these parameters affects the steam consumption
in the turbines and also the turbine efficiency. The present study was done to improve the power output of the
turbine, thermal efficiency and specific steam consumption in conventional steam power plants. Three cycles i.e
regenerative cycle, superheater cycle and cogeneration cycle are considered to formulate the data and obtain a
better result in steam turbine power plants
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
How to Create Map Views in the Odoo 17 ERPCeline George
The map views are useful for providing a geographical representation of data. They allow users to visualize and analyze the data in a more intuitive manner.
This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
2. THERMAL POWER PLANT
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 .The greatest
variation in the design of thermal
power stations is due to the
different fuel sources .Some thermal
power plants also deliver heat
energy for industrial purposes , for
heating or for desalination of water
as well as delivering electrical
power .
The Basic Energy Cycle Involved :
Chemical Energy
Mechanical Energy
Electrical Energy
5. Carnot Cycle operates reversibly and consist of two isothermal steps
connected by two adiabatic steps .In the isothermal step at high temp TH ,
heat |QH| is absorbed by the working fluid of the engine and in the
isothermal step at lower temp Tc , heat |Qc| is discarded by the fluid .
The efficiency is given by
Efficiencies of practical heat engines are lowered by
irreversibilities , it is still true that efficiency can be increased
when TH increased , TC decreased .
6. STEP 12 isothermal heat
absorption process at TH
Vaporization process occurs
also at constant pressure
Produce sat steam from sat liq
.
STEP 23 Reversible adiabatic
expansion of sat vap to a pressure at
which T sat = Tc.
Isentropic expansion process
represented by vertical line on T-S
diagram .
Produces WET vap .•STEP 34 Isothermal
heat rejection step at TC .
•Represented by
horizontal line .
STEP 41 takes cycle back to its original
state .
Producing sat water at point 1.
7. Though we get the HIGHEST POSSIBLE EFFICIENCY , there are severe
practical difficulties :
STEP 23 TURBINE that take Sat
steam produces an exhaust with a
high liquid content ,which cause
severe erosion .
STEP 41 difficulties in the design
of a pump that takes a mix of liq and
vap (point4) and discharges a sat liq
(point 1) .
For these reasons an alternative Model Cycle is taken as
STANDARAD , atleast for fossil fuel burning power plants , It ‘s
called RANKINE CYCLE .
8. RANKINE CYCLE
Who is Rankine and What is Rankine Cycle?
A Scottish CIVIL ENGINEER, physicist
and mathematician. He was a founding
contributor, with Rudolf Clausius and
William Thomson, to the science of
thermodynamics, particularly focusing on
the first of the three thermodynamic laws.
The Rankine cycle is a cycle that converts
heat into work. The heat is supplied
externally to a closed loop, which usually
uses water. This cycle generates about
90% of all electric power used throughout
the world
10. STEP 12 A constant pressure heating process
Consist if 3 section :
Heating if subcooled liquid water to its sat temp .
Vaporization at constant temp and pressure .
SUPER HEATING if vapor to a temp well above its sat temp.
STEP 23 Isentropic Expansion of vap in a turbine to the pressure
of the condenser .
STEP crosses the saturation curve .producing a wet exhaust .
The super heating in step 12 shifts the vertical line far enough to
the right so that moisture content is not too large.
11. STEP 41 Isentropic pumping of Sat liquid to the pressure of the boiler ,
producing compressed liquid .
The vertical line is very short (Temp rise associated with compression of
liquid is very small).
Energy analysis: steady flow process, no generation, neglect KE and PE
changes for all four devices,
0 = (net heat transfer in) - (net work out) + (net energy flow in)
0 = (qin - qout) - (Wout - Win) + (hin - hout)
• PROCESS:
• 4-1: Pump (q=0) Wpump = h4 - h1 = v(P4-P1)
• 1-2: Boiler(W=0) qin = h2 – h1
• 2-3: Turbine(q=0) Wout = h2 – h3
• 3-4: Condenser(W=0) qout = h3 – h4
Thermal efficiency h = Wnet/qin =
1 - qout/qin = 1 - (h3-h4)/(h2-h1)
Wnet = Wout - Win = (h2-h3) - (h4-h1)
12. REHEAT RANKINE CYCLE
How can we take advantage of the increased efficiencies at higher boiler
pressures without facing the problem of excessive moisture at the final
stages of the turbine?
1. Superheat the steam to very high temperatures before it enters the
turbine. This would be the desirable solution since the average temperature
at which heat is added would also increase, thus increasing the cycle efficiency.
This is not a viable solution, however, since it requires raising the
steam temperature to metallurgically unsafe levels.
2.Expand the steam in the turbine in two stages, and reheat it in
between. In other words, modify the simple ideal Rankine cycle with a
reheat process. Reheating is a practical solution to the
excessive moisture problem in turbines, and it is commonly used in
modern steam power plants.
13. boiler
high-P
turbine
Low-P
turbine
pump
condenser
T
s
high-P
turbine
2
3
4
5 6
1
expansion process takes place in two stages. In the first stage (the highpressure
turbine), steam is expanded isentropically to an intermediate pressure
and sent back to the boiler where it is reheated at constant pressure,
usually to the inlet temperature of the first turbine stage. Steam then expands
isentropically in the second stage (low-pressure turbine) to the condenser
pressure.
LOW
press
14. The incorporation of the single reheat in a modern power plant improves
the cycle efficiency by 4 to 5 percent by increasing the average temperature
at which heat is transferred to the steam.
The average temperature during the reheat process can be increased by
increasing the number of expansion and reheat stages
Energy analysis: Heat transfer and work output
both change
qin = qprimary + qreheat = (h3-h2) + (h5-h4)
Wout = Wturbine1 + Wturbine2 = (h3-h4) + (h5-h6)
16. The purpose of Feed Water Heating is to rise the average Temperature
at which heat is added to the boiler .This increases the thermal
Efficiency of the plant , Which is said to operate on a REGENERATIVE
CYCLE .
T
s
1
2
2’
3
4
Lower temp
heat addition
T
s
1
2
3
4
5
6
7
Use regenerator to heat up the feedwater
higher temp
heat addition
Extract steam from
turbine to provide
heat source in the
regenerator
17. HOW CAN WE INCREASE THE EFFICIENCY
OF THE RANKINE CYCLE?
Increase the average temperature at which heat is transferred to the
working fluid in the boiler, or decrease theaverage temperature at which
heat is rejected from the working fluid in the condenser.
SUPER CRITICAL RANKINE CYCLE :
Today many modern steam power plants operate at supercritical pressures
(P > 22.06 MPa) and have thermal efficiencies of about 40 percent for
fossil-fuel plants and 34 percent for nuclear plants.
There are over 150 supercritical-pressure steam power plants in operation
in the United States.