This document discusses water turbines used in hydroelectric power plants. It defines key terms like specific energy, gross head, gross specific hydraulic energy, and gross power. It also describes different types of turbines like impulse turbines (Pelton, Turgo) and reaction turbines (Francis, Kaplan, Bulb) and compares their characteristics. It discusses concepts like specific speed, speed number, unit and specific quantities that are used to classify and select turbines based on factors like head, rotational speed, efficiency and more. It also provides examples of problems calculating speed number, specific speed and selecting the suitable turbine type.
from this ppt you can almost aware about the operation of hydraulic turbines and various specification releated to it...
if you want to attains the knowledge about the turbines then must watch this ppt,... thankyou!
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turbine from the Latin turbo, a vortex, related to the Greek meaning "turbulence is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful work. The work produced by a turbine can be used for generating electrical power when combined with a generator.[3] A turbine is a turbomachine with at least one moving part called a rotor assembly, which is a shaft or drum with blades attached. Moving fluid acts on the blades so that they move and impart rotational energy to the rotor. Early turbine examples are windmills and waterwheels.
from this ppt you can almost aware about the operation of hydraulic turbines and various specification releated to it...
if you want to attains the knowledge about the turbines then must watch this ppt,... thankyou!
if you want to follow me on twitter then contact me at
ishantgautam51@yahoo.com
turbine from the Latin turbo, a vortex, related to the Greek meaning "turbulence is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful work. The work produced by a turbine can be used for generating electrical power when combined with a generator.[3] A turbine is a turbomachine with at least one moving part called a rotor assembly, which is a shaft or drum with blades attached. Moving fluid acts on the blades so that they move and impart rotational energy to the rotor. Early turbine examples are windmills and waterwheels.
Classification of turbines – heads and efficiencies – velocity triangles. Axial, radial and mixed flow
turbines. Pelton wheel, Francis turbine and Kaplan turbines- working principles - work done by
water on the runner – draft tube. Specific speed - unit quantities – performance curves for turbines – governing of turbines.
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The turbine capable of working under the high potential head of water is the Pelton Wheel Turbine which works on the head greater than 300 m.
The runner consists of a circular disc with a suitable number of double semi-ellipsoidal cups known as buckets which are evenly spaced around its Periphery.
One or more nozzles are mounted so that, each directs a jet along the tangent to the circle through the centers of the buckets called the Pitch Circle.
For more information, visit https://mechanicalstudents.com/pelton-wheel-turbine/
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hi, I am sujon I just completed graduate at International University of Business Agriculture and Technology in Bangladesh Department of Mechanical Engineering
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Classification of turbines – heads and efficiencies – velocity triangles. Axial, radial and mixed flow
turbines. Pelton wheel, Francis turbine and Kaplan turbines- working principles - work done by
water on the runner – draft tube. Specific speed - unit quantities – performance curves for turbines – governing of turbines.
Watch Video of this presentation on Link: https://youtu.be/g8eJsznmsaY
For notes/articles, Visit my blog (link is given below).
For Video, Visit our YouTube Channel (link is given below).
Any Suggestions/doubts/reactions, please leave in the comment box.
Follow Us on
YouTube: https://www.youtube.com/channel/UCVPftVoKZoIxVH_gh09bMkw/
Blog: https://e-gyaankosh.blogspot.com/
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The turbine capable of working under the high potential head of water is the Pelton Wheel Turbine which works on the head greater than 300 m.
The runner consists of a circular disc with a suitable number of double semi-ellipsoidal cups known as buckets which are evenly spaced around its Periphery.
One or more nozzles are mounted so that, each directs a jet along the tangent to the circle through the centers of the buckets called the Pitch Circle.
For more information, visit https://mechanicalstudents.com/pelton-wheel-turbine/
Watch Video of this presentation on Link: https://youtu.be/bHKaPBgDk6g
For notes/articles, Visit my blog (link is given below).
For Video, Visit our YouTube Channel (link is given below).
Any Suggestions/doubts/reactions, please leave in the comment box.
Follow Us on
YouTube: https://www.youtube.com/channel/UCVPftVoKZoIxVH_gh09bMkw/
Blog: https://e-gyaankosh.blogspot.com/
Facebook: https://www.facebook.com/egyaankosh/
hi, I am sujon I just completed graduate at International University of Business Agriculture and Technology in Bangladesh Department of Mechanical Engineering
Watch Video of this presentation on Link: https://youtu.be/nt9-q5SDaqk
For notes/articles, Visit my blog (link is given below).
For Video, Visit our YouTube Channel (link is given below).
Any Suggestions/doubts/reactions, please leave in the comment box.
Follow Us on
YouTube: https://www.youtube.com/channel/UCVPftVoKZoIxVH_gh09bMkw/
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Watch Video of this presentation on Link: https://youtu.be/xIGlZ3UvLdw
For notes/articles, Visit my blog (link is given below).
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Any Suggestions/doubts/reactions, please leave in the comment box.
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Watch Video of this presentation on Link: https://youtu.be/OFIgUfclEHU
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hi, I am sujon I just completed graduate at International University of Business Agriculture and Technology in Bangladesh Department of Mechanical Engineering
Applications of turbines-Hydroelectric Power PlantsAnand Prithviraj
Different types of turbines used in hydroelectric power plants based on the working parameters such as head, flow, etc., Characteristics of a turbine; specific to its applications in a dam.
Hydraulic Turbines – II: Governing of turbines – Surge tanks – Unit and speci...Mood Naik
Hydraulic Turbines – II: Governing of turbines – Surge tanks – Unit and specific turbines – Unit speed
– Unit quantity – Unit power – Specific speed – Performance characteristics – Geometric similarity –
Cavitation. Selection of turbines
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
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Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Runway Orientation Based on the Wind Rose Diagram.pptx
3. water turbine (intro)
1. FLUID MACHINES
Chapter 3: Water Turbine
Presented by
Keshav Kumar Acharya
Teaching Assistant
TU, IOE
Purwanchal Campus
2. Specific energy
The specific energy of a hydro power plant is the
quantity of potential and kinetic energy which 1
kilogram of the water delivers when passing
through the plant from an upper to a lower
reservoir.
The expression of the specific energy is Nm/kg or J/kg
and is designated as m2/s2.
4. Gross Specific Hydraulic Energy
In a hydro power plant, the difference between the
level of the upper reservoir zres and the level of the
tail water ztw is defined as the gross head:
Hgr = zres - ztw [m]
The corresponding gross specific hydraulic energy:
][ kgJHgE grgr
5. Gross Power
grgrgr HgQEQP
Where:
Pgr is the gross power of the plant [W]
is the density of the water [kg/m3]
Q is the discharge [m3/s]
6. Definition of heads
• Gross head (Hg):
– the difference between the head race level and tail
race level when no water is flowing
• Net head:
– also called effective head
– the head at the inlet of the turbine
• When water is flowing from head race to the turbine, a
loss of head due to friction between the water and
penstocks occurs as a major losses
fgn hHH
7. Classification of the turbines
Hydraulic turbines are classified based upon:
• Energy available at the inlet of the runner:
e.g. impulse and reaction turbine
• Direction of the flow through the runner:
e.g. tangential flow, radial flow, axial flow & mixed flow
• Head at inlet of turbine:
e.g. High head, medium head and low head
• According to specific speed:
e.g. low sp. speed, medium sp. speed & high sp. speed
• According to speed number:
e.g. low speed no., medium speed no. & high speed no.
8. Impulse turbines
(Partial turbines)
The hydraulic energy is completely converted to
kinetic energy before transformation in the runner
212121 ; wwandvvpp (neglecting losses in buckets)
10. Reaction turbines
(Full turbines)
In the reaction turbines two effects cause the energy
transfer from the flow to mechanical energy on the turbine
shaft.
Firstly it follows from a drop in pressure from inlet to outlet
of the runner. This is denoted the reaction part of the
energy conversion.
Secondly changes in the directions of the velocity vectors
of the flow through the canals between the runner blades
transfer impulse forces. This is denoted the impulse part of
the energy conversion.
212121 ; wwandvvpp
12. Impulse versus Reaction turbines
Aspects Impulse turbines Reaction turbines
Conversion
of fluid
energy
The available fluid energy is
converted in to K.E. by a
nozzle
Only a portion of the fluid energy is
transformed into K.E. energy before
the fluid enter the turbine runner
Change in
pressure &
velocity
The pressure remains
same (atm.) throughout the
action of water on the
runner
After entering the runner with an
excess pr., water undergoes changes
both in velocity and pr. while passing
through the runner
Admittance
of water over
the wheel
Water may be allowed to
enter a part or whole of the
wheel circumference
Water is admitted over the
circumference of the wheel
Role of
casing
No hydraulic function to
perform; it only serves to
prevent splashing and to
guide the water to the tail
race
Pr. at inlet to the turbine is much
higher than the pr. at outlet; unit has to
be sealed from atmospheric conditions
and therefore , casing is absolutely
essential
13. Impulse vs. Reaction turbines
contd..
Aspects Impulse turbines Reaction turbines
Relative velocity
of water
Either remaining constant or
reduces slightly due to
friction
Due to continuous drop in pr.
during flow through the blade, the
relative velocity increase
Installation of unit Always installed above the
tail race. No draft tube is
used
Units may be installed above or
bellow the tail race and use of
draft tube is made
Flow regulation By means of needle valve
fitted into the nozzle
By means of guide vane
assembly
Action on blades Blades are only in action
when they are in front of the
nozzle
Blades are in action all the time
Extent to which
the water fills the
turbine
Turbine does not run full
and air has a free access to
the buckets
Water completely fills all the
passages throughout the
operation of the turbine
14. Unit and Specific Quantities
• Rate of flow, speed, power, etc. of hydraulic machines are all
functions of working head
• To facilitate correlation, comparison and use of experimental
data, these quantities are usually reduced to a unit heads
• Each is expressed as a function of head and its value
corresponding to a unit value of head is determined
• These reduced quantities are known as Unit Quantities
• Eg: unit flow, unit speed, unit force, unit power, unit torque,
etc.
• Two similar turbines having different data can be compared by
reducing data of both turbines under unit head
15. Unit and Specific Quantities
• A Specific Quantity is obtained by reducing any quantity to a
value corresponding to unit head and some unit size
• The later dimension being inlet diameter of runner in case of
reaction turbines and jet diameter in case of Pelton turbines
• Specific flow is the rate of flow corresponding to unit head and
unit diameter
• Specific power is the power corresponding to a unit head and
unit diameter
• But Specific Speed of a turbine is defined as the speed of a
geometrically similar turbine working under a unit head and
developing unit power
• Specific speed is the modern basis of scientific classification
of turbines and pumps
16. Specific speed
4
5
H
pN
Ns
Specific speed is the speed of geometrically similar turbine (i.e., a turbine
of identical in shape, dimensions, blade angles and gate opening etc.)
with the actual turbine but such a size that would develop unit power
when working under a unit head.
Specific speed provides a basis on which different types of turbines can be
compared irrespective of their sizes, which is proportional to the speed of
rotation and inversely proportional to the head.
This mean that:
High speed Propeller type turbines (Kaplan turbine) are expected to have
high specific speeds than relatively low machine (Pelton turbines) and
the high head machines (Pelton) would have low value of specific
speed than the Francis and Kaplan units which operate under medium and
low head
Where,
N = rpm, p = kW and H = m
17. Classification of the turbines based
upon specific speed
S.N. Type of turbine Head H (m) Specific speed
(Ns)
1 Pelton with 1 jet Up to 2000 12 to 30
2 Pelton with 2 jets Up to 1500 17 to 50
3 Pelton with 4 jets Up to 500 24 to 70
4 High head Francis Up to 300 80 to 150
5 Medium head Francis 50 to 150 150 to 250
6 Low head Francis 30 to 60 250 to 400
7 Propeller and Kaplan 4 to 60 300 to 1000
8 Bulb or tubular turbines 3 to 10 1000 to 1200
21. Selection of hydraulic turbines
• Specific speed
• Rotational speed
• Efficiency
• Part load operation
• Overall cost
• Cavitation
• Disposition of shaft
• Number of units
• Head
• Sediment erosion
22. Problems
• Find the speed number & specific speed of a turbine
installed at a site, which develops 12,940 kW under a
head of 510 m when running at 300 rpm. Specify the
type of the turbine employed. Does this valid from both
approach?
• The turbine installed at one particular power house
develops 2.54 MW under a head of 29.9 m. Find the
specific speed of this turbine if it runs at 166.7 rpm.
Knowing the specific speed, what type of runner would
you select for such a turbine?
• An impulse turbine develops 1.865 MW under a head
70 m. What could be the maximum and minimum
speeds of the turbine with a single nozzle? What
speed would be the best for coupling to an alternator ?
How high a speed could a reaction turbine give?