The document discusses different methods of governing steam turbines to maintain a constant rotational speed despite varying loads. Throttle governing reduces steam pressure through a restricted passage before entering the turbine. Nozzle governing opens and closes sets of nozzles to control steam flow. Bypass governing introduces steam into later turbine stages during overloads. Combination governing uses two methods, typically bypass and nozzle. Electro-hydraulic governing uses electronic, hydraulic, and mechanical components to precisely control steam flow and allow synchronization to power grids for load and frequency regulation.
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
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
Combined Cycle Gas Turbine Power Plant Part 1Anurak Atthasit
Introduction to Combined Cycle Gas Turbine Power Plant. Describing the advantage and design limit of the CCGT. Overview of Brayton Cycle and Rankine Cycle - showing some basic thermodynamic to explain some background of CCGT.
A gas turbine, also called a combustion turbine, is a type of internal combustion engine. It has an upstream rotating compressor coupled toa downstream turbine, and a combustion chamber in-between. Energy is added to the gas stream in the combustor, where fuel is mixed with air and ignited. In the high-pressure environment of the combustor, combustion of the fuel increases the temperature. The products of the combustion are forced into the turbine section
Visit https://www.topicsforseminar.com to Download
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.
Combined Cycle Gas Turbine Power Plant Part 1Anurak Atthasit
Introduction to Combined Cycle Gas Turbine Power Plant. Describing the advantage and design limit of the CCGT. Overview of Brayton Cycle and Rankine Cycle - showing some basic thermodynamic to explain some background of CCGT.
A gas turbine, also called a combustion turbine, is a type of internal combustion engine. It has an upstream rotating compressor coupled toa downstream turbine, and a combustion chamber in-between. Energy is added to the gas stream in the combustor, where fuel is mixed with air and ignited. In the high-pressure environment of the combustor, combustion of the fuel increases the temperature. The products of the combustion are forced into the turbine section
Visit https://www.topicsforseminar.com to Download
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 plant instrumentation and controlShilpa Shukla
Detail working description of each components used in A Thermal or Coal based Plant for generation of electricity. Controlling and automation is described.
Unit 6- Governers , Dynamics of machines of VTU Syllabus prepared by Hareesha N Gowda, Asst. Prof, Dayananda Sagar College of Engg, Blore. Please write to hareeshang@gmail.com for suggestions and criticisms.
About this Training Course
To provide attendees with a detailed understanding of the calculations required to evaluate the performance of a
Combined Cycle Gas Turbine (CCGT) Power Plant. Provide an understanding of the requirements as regards implementing a successful performance evaluation strategy for a Combined Cycle Gas Turbine Power Plant
Key Learning Outcome
Performance Test Calculations
Power Output/Heat Rate Calculations
Correction Factors
Performance Monitoring
Performance Diagnostics
Performance Improvements
Combined Cycle GT Plant Overview
Performance Terms and Definitions
Brayton Cycle
Rankine Cycle
Combined Cycle
Performance Test Objectives
Uncertainty Analysis
Who Should Attend
This course would be ideal for any engineer requiring an understanding of the thermodynamic calculations required to assess the performance of a CCGT Power Plant. Attendees would be encouraged to bring their own plant data for discussion during the course.
Gas Turbine , CCPP, Operation& Maintenance, spare part supply, Manpower service for Power Plant, GE LM6000 ,GE LM2500, GE FRAME 6,... P&W, MAN, RR, Turbine commisioning and start up,......
A COMPREHENSIVE STUDY ON GOVERNING OF HYDRAULIC TURBINESMayurjyotiNeog
This short presentation consists of a brief study on governing of hydraulic turbines, different governing components & governing systems used in India.
Hello Everyone!
The best ppt on watt governor. Learners can easily grasp it if they go through the whole ppt. Also helpful for making projects on watt governor.
By going through the ppt one can easily learn about the watt governor from basics.
You can also apply the knowledge that you gained from this ppt in real life problems.
About the ppt:
Watt governor is the simplest and gravity controlled form of the centrifugal governors.
It consists of two fly balls attached to the sleeve of negligible mass. The upper sides of arms are pivoted so that its balls can move upward and downward as they revolve with a vertical spindle. The engine drives the spindle through bevel gears.
The lower arms are connected to the sleeves. The sleeve is keyed to the spindle in such a way that revolves with the spindle.
At the same time, it can slide up and down according to the spindle speed. Two stoppers are provided at the bottom and top of the spindle to limit the movement sleeve.
Watt governor is also known as simple conical governor.
In the case of watts governor, the controlling force is provided by the action of gravity, at uniform speed controlling force is equal to the centrifugal force, and it balances each other.
I will suggest to watch the whole ppt so that you can learn more about it.
Thank You!
it is a ppt on koenigsegg camless valves which are new inventions in ic engine here its principle and working have been explaned.and also working of conventional engine habe been explained.
Inter Connected Power System(Turbine Speed Governing Mechanism)Raviraj solanki
Inter Connected Power SystemTOPIC : Turbine Speed Governing Mechanism
Introduction
Turbine Speed Governing Mechanism
Mathematical Modeling
Adjustment Of Governor Characteristics
The speed governing system consists of the following parts .
Speed governor
Linkage mechanism
Hydraulic amplifier
Speed changer
Hydraulics is a branch of science which deals with hydraulic fluid. It is used in places where cleanliness is not a priority but requires huge power to perform tasks.
application:
1. Industrial: Plastic processing machineries, steel making and primary metal extraction applications, automated production lines, machine tool industries, paper industries, loaders, crushes, textile machineries, R & D equipment and robotic systems etc.
2 Mobile hydraulics: Tractors, irrigation system, earthmoving equipment, material handling equipment, commercial vehicles, tunnel boring equipment, rail equipment, building and construction machineries and drilling rigs etc.
3 Automobiles: It is used in the systems like breaks, shock absorbers, steering system, wind shield, lift and cleaning etc.
4 Marine applications: It mostly covers ocean going vessels, fishing boats and navel equipment.
5 Aerospace equipment: There are equipment and systems used for rudder control, landing gear, breaks, flight control and transmission etc. which are used in airplanes, rockets and spaceships.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
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 Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
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Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
1. Steam turbine governing
Steam turbine governing is the procedure of controlling the
flow rate of steam into a steam turbine so as to maintain its
speed of rotation as constant. The variation in load during the
operation of a steam turbine can have a significant impact on
its performance. In a practical situation the load frequently
varies from the designed or economic load and thus there
always exists a considerable deviation from the desired
performance of the turbine. The primary objective in the
steam turbine operation is to maintain a constant speed of
rotation irrespective of the varying load. This can be achieved
by means of governing in a steam turbine.
The principal methods used for governing are described
below.
2. Turbine Governing
The steam flow through the control valve is
proportional to the valve opening in the operating
range. So when valve position changes, turbine
steam flow changes and turbine power output
also changes proportionally. Thus governing
system changes the turbine mechanical
power output. In no load unsynchronized
condition, all the power is used to accelerate
the rotor only (after meeting rotational losses) and
hence the speed changes. The rate of speed
change is governed by the inertia of the entire
rotor system. In the grid connected condition, only
power pumpedinto the system changes when
3. Throttle governing
In throttle governing the pressure of steam is reduced at the turbine entry thereby
decreasing the availability of energy. In this method steam is allowed to pass through
a restricted passage thereby reducing its pressure across the governing valve. The
flow rate is controlled using a partially opened steam stop valve. The reduction in
pressure leads to a throttling process in which the enthalpy of steam remains
constant. Throttle governing – small turbines
Low initial cost and simple mechanism
makes throttle governing the most apt
method for small steam turbines. The
mechanism is illustrated in figure 1. The
valve is actuated by using a centrifugal
governor which consists of flying balls
attached to the arm of the sleeve. A geared
mechanism connects the turbine shaft to the
rotating shaft on which the sleeve
reciprocates axially. With a reduction in the
load the turbine shaft speed increases and
brings about the movement of the flying balls
away from the sleeve axis. This result in an
axial movement of the sleeve followed by the
activation of a lever, which in turn actuates
the main stop valve to a partially openedfigure 1- Throttle
4. Throttle governing
Throttle governing – big turbines
In larger steam turbines an oil operated servo mechanism is used in
order to enhance the lever sensitivity. The use of a relay system
magnifies the small deflections of the lever connected to the governor
sleeve. The differential lever is connected at both the ends to the
governor sleeve and the throttle valve spindle respectively. The pilot
valves spindle is also connected to the same lever at some
intermediate position. Both the pilot valves cover one port each in the
oil chamber. The outlets of the oil chamber are connected to an oil drain
tank through pipes. The decrease in load during operation of the turbine
will bring about increase in the shaft speed thereby lifting the governor
sleeve. Deflection occurs in the lever and due to this the pilot valve
spindle raises up opening the upper port for oil entry and lower port for
oil exit. Pressurized oil from the oil tank enters the cylinder and pushes
the relay piston downwards. As the relay piston moves the throttle valve
spindle attached to it also descends and partially closes the valve. Thus
the steam flow rates can be controlled. When the load on the turbine
increases the deflections in the lever are such that the lower port is
opened for oil entry and upper port for oil exit. The relay piston moves
upwards and the throttle valve spindle ascend upwards opening the
valve. The variation of the steam consumption rate ṁ (kg/h) with the
turbine load during throttle governing is linear.
5. Nozzle Governing
The actuation of individual valve
closes the corresponding set of
nozzle thereby controlling the flow
rate. In actual turbine, nozzle
governing is applied only to the first
stage whereas the subsequent
stages remain unaffected. Since no
regulation to the pressure is
applied, the advantage of this
method lies in the exploitation of full
boiler pressure and temperature.
Figure 2 shows the mechanism of
nozzle governing applied to steam
turbines. As shown in the figure the
three sets of nozzles are controlled
In nozzle governing the flow rate of steam is regulated by opening and
shutting of sets of nozzles rather than regulating its pressure. In this
method groups of two, three or more nozzles form a set and each set is
controlled by a separate valve. The actuation of individual valve closes
the corresponding set of nozzle thereby controlling the flow rate.
Figure 2 : Nozzle governing
6. By pass governing
Occasionally the turbine is overloaded for short durations. During such
operation, bypass valves are opened and fresh steam is introduced into
the later stages of the turbine. This generates more energy to satisfy the
increased load. The schematic of bypass governing is as shown in
figure3.
Figure3 : Bypass governing
7. Combination governing
Combination governing employs usage of any two of
the above mentioned methods of governing.
Generally bypass and nozzle governing are used
simultaneously to match the load on turbine as shown
in figure 3.
8. ELECTRO HYDRAULIC GOVERNING SYSTEM
Basically the controls can be described as i) speed control when the
machine is not connected to the grid or in isolation and ii) load
control when the machine is connected to the grid. The governing
system has three functional parts: i) sensing part ii) processing part
and iii)amplification. These functions are realized using a set of
electronic, hydraulic and mechanical elements, in the electro-
hydraulic governor (EHG)
When the turbine generator unit is being started, governing system c
ontrols the speed precisely by regulating the steam flow. Once the
unit is synchronized to the power system grid, same control system
is used to load the machine. As the connected system has very large
inertia (‘infinite bus’), one machine cannot change the frequency of
the grid. But it can participate in the power system frequency
regulation as part of a group of generators that aroused for automatic
load frequency control. (ALFC).As shown in the block diagram, the
valve opening changes either by changing the reference setting or by
the change in speed (or frequency).