This presentation summarizes information about blowers and fans. It defines fans and blowers, describes common types like axial and centrifugal fans. It covers topics like fan components, system resistance, fan curves, and operating points. Metrics for comparing fan performance like peak efficiency and pressure rise are defined. Strategies for improving energy efficiency are outlined, including selecting the right fan size, reducing system resistance, and operating near the best efficiency point. The importance of regular maintenance is also emphasized.
An engineering overview on industrial fans and blowers. it contains types and applications of different types. and it provide the most common ways we use to control the flow rate and power. this slides contain also an excellent images to illustrate the case and the type .
An engineering overview on industrial fans and blowers. it contains types and applications of different types. and it provide the most common ways we use to control the flow rate and power. this slides contain also an excellent images to illustrate the case and the type .
Air compressors:- One of the important device used to compress air at high pressure.
The presentation contains a detailed information about air compressors, classification of air compressors, reciprocating air compressors, rotary type, multistage/ single stage compressors. advantages and lastly application/ uses of air compressors.
Hope You like the presentation.
Maintenance of Fans, Blowers and FluidizersDanial Sohail
Maintenance are activities required or undertaken to conserve as nearly, and as long, as possible the original condition of an asset or resource. Maintenance is also required by Fans, Blowers and Fluidizers, Following presentation describes briefly about precautions that should be taken for long life of equipment.
Gas turbine is an important topic usually studied in mechanical engineering, aeronautical engineering, power plant engineering, electrical engineering, and some other related engineering branches. The gas turbine is an air breathing heat engine, said to be the heart of the power plant produces electric power, by burning of gas (or) liquid fuels along with fresh air. The fresh air performs two main functions in gas turbine. The fresh air acts as a cooling agent for various parts of the power plants and gives required amount of oxygen for combustion of fuel. Topics covered in the ppt
Gas Turbines: Simple gas turbine plant- Ideal cycle, closed cycle and open cycle for gas turbines Efficiency, work ratio and optimum pressure ratio for simple gas turbine cycle Parameters of performance- Actual cycle, regeneration, Inter-cooling and reheating. the topics covered are almost same in all the universities. some problems were discussed in each and concept to make them understand clearly.
In the hydrocarbon processing and production industry, gas is compressed for transportation to consuming markets and for use in processing operations. This presentation is about the construction and operation of compressors.
In this presentation you will learn about the construction and operation of centrifugal compressors.
Aircraft refrigeration system (air cooling system)Ripuranjan Singh
Aircraft air refrigeration systems are required due to heat transfer from many external and internal heat sources (like solar radiation and avionics) which increase the cabin air temperature. With the technological developments in high-speed passenger and jet aircraft's, the air refrigeration systems are proving to be most efficient, compact and simple. Various types of aircraft air refrigeration systems used these days are.
Simple air cooling system
Simple air evaporative cooling system
Boot strap air cooling system
Boot strap air evaporative cooling system
Reduced ambient air cooling system
Regenerative air cooling system
COMPRESSOR EFFICIENCY AND TURBINE EFFICIENCY.
Comparison of Various Air Cooling Systems used for Aircraft ON basis of dart
Compressors complete description and a well arranged slides for the topic. That's too the point and relevant slide share you are looking for! Hope you will find it easy to understand
Thank you!
Air compressors:- One of the important device used to compress air at high pressure.
The presentation contains a detailed information about air compressors, classification of air compressors, reciprocating air compressors, rotary type, multistage/ single stage compressors. advantages and lastly application/ uses of air compressors.
Hope You like the presentation.
Maintenance of Fans, Blowers and FluidizersDanial Sohail
Maintenance are activities required or undertaken to conserve as nearly, and as long, as possible the original condition of an asset or resource. Maintenance is also required by Fans, Blowers and Fluidizers, Following presentation describes briefly about precautions that should be taken for long life of equipment.
Gas turbine is an important topic usually studied in mechanical engineering, aeronautical engineering, power plant engineering, electrical engineering, and some other related engineering branches. The gas turbine is an air breathing heat engine, said to be the heart of the power plant produces electric power, by burning of gas (or) liquid fuels along with fresh air. The fresh air performs two main functions in gas turbine. The fresh air acts as a cooling agent for various parts of the power plants and gives required amount of oxygen for combustion of fuel. Topics covered in the ppt
Gas Turbines: Simple gas turbine plant- Ideal cycle, closed cycle and open cycle for gas turbines Efficiency, work ratio and optimum pressure ratio for simple gas turbine cycle Parameters of performance- Actual cycle, regeneration, Inter-cooling and reheating. the topics covered are almost same in all the universities. some problems were discussed in each and concept to make them understand clearly.
In the hydrocarbon processing and production industry, gas is compressed for transportation to consuming markets and for use in processing operations. This presentation is about the construction and operation of compressors.
In this presentation you will learn about the construction and operation of centrifugal compressors.
Aircraft refrigeration system (air cooling system)Ripuranjan Singh
Aircraft air refrigeration systems are required due to heat transfer from many external and internal heat sources (like solar radiation and avionics) which increase the cabin air temperature. With the technological developments in high-speed passenger and jet aircraft's, the air refrigeration systems are proving to be most efficient, compact and simple. Various types of aircraft air refrigeration systems used these days are.
Simple air cooling system
Simple air evaporative cooling system
Boot strap air cooling system
Boot strap air evaporative cooling system
Reduced ambient air cooling system
Regenerative air cooling system
COMPRESSOR EFFICIENCY AND TURBINE EFFICIENCY.
Comparison of Various Air Cooling Systems used for Aircraft ON basis of dart
Compressors complete description and a well arranged slides for the topic. That's too the point and relevant slide share you are looking for! Hope you will find it easy to understand
Thank you!
Why compressed air is so expensive and what to do about itDesign World
Compressed air is one of the least efficient ways to transmit energy to manufacturing machines. This webinar will discuss the high cost of compressed air, why it is typically inefficient, and what to do about it. The webinar will be discussing the complete system from the air compressors all the way to the end use.
Topics covered in this webinar include:
· Why compressed air is expensive
· Three secrets to cutting compressed air costs
· System pressure and its effects
· Improving the supply side
· Efficient transmission of compressed air
· Reducing the demand side
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.
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.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Event Management System Vb Net Project Report.pdfKamal Acharya
In present era, the scopes of information technology growing with a very fast .We do not see any are untouched from this industry. The scope of information technology has become wider includes: Business and industry. Household Business, Communication, Education, Entertainment, Science, Medicine, Engineering, Distance Learning, Weather Forecasting. Carrier Searching and so on.
My project named “Event Management System” is software that store and maintained all events coordinated in college. It also helpful to print related reports. My project will help to record the events coordinated by faculties with their Name, Event subject, date & details in an efficient & effective ways.
In my system we have to make a system by which a user can record all events coordinated by a particular faculty. In our proposed system some more featured are added which differs it from the existing system such as security.
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.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
Contact with Dawood Bhai Just call on +92322-6382012 and we'll help you. We'll solve all your problems within 12 to 24 hours and with 101% guarantee and with astrology systematic. If you want to take any personal or professional advice then also you can call us on +92322-6382012 , ONLINE LOVE PROBLEM & Other all types of Daily Life Problem's.Then CALL or WHATSAPP us on +92322-6382012 and Get all these problems solutions here by Amil Baba DAWOOD BANGALI
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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.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
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.
Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
2. Instruments Used
1: Power Quality Analyzer Fluke 43 B
2: Strobo Scope
3: Air Flow Meter
4: Anemometer
3. 1. An apparatus with rotating blades that creates a current
of air for cooling or ventilation.
2. A handheld device, typically folding and shaped like a
segment of a circle when spread out, that is waved so as
to cool the person holding it.
What is Fan ?
A blower is a machine used for moving gas with a
moderate increase of pressure: a more powerful fan, if
you will. By changing the angle of the blades, a blower
will be able to push air in any direction you want it.
What is Blower ?
7. System Resistance
• Sum of static pressure losses in system
• Configuration of ducts, pickups, elbows
• Pressure drop across equipment
• Increases with square of air volume
• Long narrow ducts, many bends: more
resistance
• Large ducts, few bends: less resistance
8. Types of Fans
FANS
Axial Fans Centrifugal Fans
Propeller
fans
Tube axial
fans
Vane axial
fans
Backward
inclined
Radial
impellers
Forward
curved
impellers
Special Types of Fans
Inline centrifugal fans Power roof ventilators
Fan and dust collector
combination
Disc blade
Propeller
blade
10. Types of Fans & Blowers
• Rotating impeller increases air velocity
• Air speed is converted to pressure
• High pressures for harsh conditions
• High temperatures
• Moist/dirty air streams
• Material handling
• Categorized by blade shapes
• Radial
• Forward curved
• Backward inclined
Centrifugal Fans
11. Types of Fans & Blowers
Centrifugal Fans – Radial fans
• Advantages
• High pressure and temp
• Simple design
• High durability
• Efficiency up to 75%
• Large running clearances
• Disadvantages
• Suited for low/medium
airflow rates only
12. Centrifugal Fans – Forward curved
•Advantages
• Large air volumes against low
pressure
• Relative small size
• Low noise level
•Disadvantages
• Not high pressure / harsh service
• Difficult to adjust fan output
• Careful driver selection
• Low energy efficiency 55-65%
13. Centrifugal Fans - Backward-inclined
• Advantages
• Operates with changing
static pressure
• Suited for high flow and forced
draft services
• Efficiency >85%
• Disadvantages
• Not suited for dirty airstreams
• Instability and erosion risk
14. • Work like airplane propeller:
• Blades create aerodynamic lift
• Air is pressurized
• Air moves along fan axis
• Popular with industry: compact,
low cost and light weight
• Applications
• Ventilation (requires reverse airflow)
• Exhausts (dust, smoke, steam)
Axial Fans
15. Axial Fans – Propeller fans
• Advantages
• High airflow at low pressure
• Little ductwork
• Inexpensive
• Suited for rooftop
ventilation
• Reverse flow
• Disadvantages
• Low energy efficiency
• Noisy
16. Axial Fans – Tube axial fans
• Advantages
• High pressures to overcome
duct losses
• Suited for medium-pressure,
high airflow rates
• Quick acceleration
• Space efficient
• Disadvantages
• Expensive
• Moderate noise
• Low energy efficiency 65%
17. Axial Fans – Vane axial fans
• Advantages
• Suited for medium/high pressures
• Quick acceleration
• Suited for direct motor shaft
connection
• Most energy efficient 85%
• Disadvantages
• Expensive
18. Blowers
• Difference with fans
• Much higher pressures <1.20 kg/cm2
• Used to produce negative pressures for
industrial vacuum systems
• Types
• Centrifugal blower
• Positive displacement
19. Centrifugal Blowers
• Gear-driven impeller that
accelerates air
• Single and multi-stage
blowers
• Operate at 0.35-0.70
kg/cm2 pressure
• Airflow drops if system
pressure rises
20. Positive Displacement Blowers
• Rotors trap air and push it through housing
• Constant air volume regardless of system
pressure
• Suited for applications prone to blockage
• Turn slower than centrifugal blowers
• Belt-driven for speed changes
21. Assessment of fans and blowers
• Fan efficiency:
• Ratio of the power conveyed to air stream and
power delivered by the motor to the fan
• Depends on type of fan and impeller
• Fan performance curve
• Graph of different pressures and corresponding
required power
• Supplier by manufacturers
Fan Efficiency and Performance
22. Peak efficiency or Best Efficiency Point
(BEP)
Airfoil
Tubular
Forward
Efficiency
Flow rate
Backward
Radial
Airfoil
Tubular
Forward
Efficiency
Flow rate
Backward
Radial
Type of Fan
Peak
Efficiency
Range
Centrifugal fans:
Airfoil, Backward
curved/inclined
79-83
Modified radial 72-79
Radial 69-75
Pressure blower 58-68
Forward curved 60-65
Axial fans:
Vane axial 78-85
Tube axial 67-72
Propeller 45-50
23. Before calculating fan efficiency
• Measure operating parameters
• Air velocity, pressure head, air stream temp,
electrical motor input
• Ensure that
• Fan is operating at rated speed
• Operations are at stable condition
Methodology – fan efficiency
24. Step 1: Calculate air/gas
density
Step 2: Measure air velocity
and calculate average
Step 3: Calculate the
volumetric flow in the
duct
Methodology – fan efficiency
t = Temperature of air/gas at
site condition
Cp = Pitot tube constant, 0.85
(or) as given by the
manufacturer
p = Average differential
pressure
γ = Density of air or gas at
test condition
25. Step 4: Measure the power drive of the motor
Step 5: Calculate fan efficiency
• Fan mechanical efficiency
• Fan static efficiency
Methodology – fan efficiency
26. • Non-availability of fan specification data
• Difficulty in velocity measurement
• Improper calibration of instruments
• Variation of process parameters during
tests
Difficulties in Performance Assessment
27. Energy Efficiency Opportunities
1. Choose the right fan
2. Reduce the system resistance
3. Operate close to Best Efficiency Point (BEP)
4. Maintain fans regularly
5. Control the fan air flow
28. • Considerations for fan selection
• Noise
• Rotational speed
• Air stream characteristics
• Temperature range
• Variations in operating conditions
• Space constraints and system layout
• Purchase/operating costs and operating life
• “Systems approach” most important!
• Avoid buying oversized fans
• Do not operate at Best Efficiency Point
• Risk of unstable operation
• Excess flow energy
• High airflow noise
• Stress on fan and system
1. Choose the Right Fan
29. • Increased system resistance
reduces fan efficiency
2. Reduce the System Resistance
• Check periodically
• Check after system
modifications
• Reduce where
possible
30. • Best Efficiency Point = maximum
efficiency
• Normally close to rated fan capacity
• Deviation from BEP results in inefficiency
and energy loss
3. Operate Close to BEP
31. • Periodic inspection of all system
components
• Bearing lubrication and replacement
• Belt tightening and replacement
• Motor repair or replacement
• Fan cleaning
4. Maintain Fans Regularly
32. a) Pulley change
b) Dampers
c) Inlet guide vanes
d) Variable pitch fans
e) Variable speed drives (VSD)
f) Multiple speed drive
g) Disc throttle
h) Operating fans in parallel
i) Operating fans in series
5. Control the Fan Air flow
33. a) Pulley change: reduce motor/drive pulley
size
• Advantages
• Permanent speed
decrease
• Real energy reduction
• Disadvantages
• Fan must handle capacity change
• Only applicable if V-belt system or motor
5. Control the Fan Air flow
34. b) Dampers: reduce flow and increase
upstream pressure
• Advantages
• Inexpensive
• Easy to install
• Disadvantages
• Limited adjustment
• Reduce flow but not energy consumption
• Higher operating and maintenance costs
5. Control the Fan Air flow
35. c) Inlet guide vanes
• Create swirls in fan direction
• Reduce angle air and fan blades
• Lowering fan load, pressure, air flow
• Advantages
• Improve efficiency: reduced load and airflow
• Cost effective at 80-100% of full air flow
• Disadvantage
• Less efficient at <80% of full air flow
5. Control the Fan Air flow
36. d) Variable pitch fans: changes angle incoming
airflow and blades
• Advantages
• High efficiency at range of operating conditions
• No resonance problems
• No stall problems at different flows
• Disadvantages
• Applicable to axial fans only
• Risk of fouling problems
• Reduced efficiency at low loads
5. Control the Fan Air flow
37. e) Variable speed drives (VSDs): reduce fan
speed and air flow
• Two types
• Mechanical VSDs
• Electrical VSDs (including VFDs)
• Advantages
• Most improved and efficient speed control
• Speed adjustments over continuous range
• Disadvantage: high costs
5. Control the Fan Air flow
38. f) Multiple speed drive
• Changes fan speed from one speed to other
speed
• Advantages
• Efficient control of flow
• Suitable if only 2 speeds required
• Disadvantages
• Need to jump from speed to speed
• High investment costs
5. Control the Fan Air flow
39. g) Disc throttle:
Sliding throttle that changes width of
impeller exposed to air stream
• Advantages
• Simple design
• Disadvantages
• Feasible in some applications only
5. Control the Fan Air flow
40. h) Operate more fans in parallel (instead of
one large fan)
• Advantages
• High efficiencies at varying demand
• Risk of downtime avoided
• Less expensive and better performance than one
large fan
• Can be equipped with other flow controls
• Disadvantages
• Only suited for low resistance system
5. Control the Fan Air flow
41. i) Operate fans in series
• Advantages
• Lower average duct pressure
• Less noise
• Lower structural / electrical support required
• Disadvantages
• Not suited for low resistance systems
5. Control the Fan Air flow
42. Effects of Over Size Motors
Installment of Oversized Motors
If the load is 7.5 KW and we select higher size motor, there
is loss of efficiency and so extra power consumption.
50. Fan Installation and Maintenance
Fan rating tests are conducted under ideal conditions i.e. uniform straight
air flow .
In practice duct connections cause non-uniform air flow.
Location and installation of fan must consider the location of duct
components to minimize losses.
System Effect:
This is the estimated loss in fan performance due to non-uniform air flow.
System effect factor is obtained from resulting fan performance curve and
actual system curve.
A vortex or spin may be created by non-uniform flow conditions.
This may be caused due to poor inlet box, multiple elbows or ducts near
the inlet.
If vortex or spin cannot be avoided, the use of turning vanes, splitter
sheets will reduce the effect.
51. Inspection and Maintenance:
Wear or accumulation on an impeller will cause weakening of the
impeller structure .
Severe vibrations may cause damage or failure at the bearings or fan
structure.
Scheduled inspection of following items of fans is recommended:
Bearings for proper operating temperature
Excessive vibration of bearings or housing
Belt drives for proper tension and minimum wear
Correct coupling alignment
Fan impeller for proper alignment and rotation
Impeller free from excess wear or material accumulation