Course Description
Fan and Blower systems find applications in most plants, residential and industries. Proper specifications and selection is the first requirement for more efficient machines. The different types of fans and blowers and their range of application, structure
and operation will be covered. Understanding the performance curves of the machine and its interaction with the duct system plays an important role
for
trouble free operation and reduced machine downtime.
Course Objective
o
Learn to read and use correctly the fan performance curves
o
Learn how to calculate the performance curves of fans and blowers
o
Understand how different factors affect fan/blower performance
o
Learn how to write the right specifications, and do the right fan selection
o
Learn how to apply the related standards and specifications of fans
Who Should
attend?
Heads of Maintenance and Operation, Mechanical
and Chemical Engineers, Equipment Specialists, Technical Engineers, Rotating Equipment Engineers, Vibration Monitoring Engineers, Planning Engineers, Lub
Course Outline
Day 1
Fans and Blowers Fundamentals
· Fan Types
· Axial-flow Fans and Centrifugal Fans
· Vane Types:
o Backward-Curved Vanes, Airfoil Vane, Radial Vane, and Multiblade type,
· Suction Type:
· Setting Method
· Rotor Supporting
· Shaft Direction
· Performance curves
· Performance Terms
· Fan Performance Data/Curves
· Factors Affecting Fan Performance: improper inlet conditions, non-uniform inlet,
· Measurement of fan performance curves
· Outlet Duct Test Setup
· Fan Performance Calculation
· Fan Similarity Laws
· Speed Change Fan Law
· Size Change Fan Law
· Density Effect
· Fan Efficiency
· Efficiency Factors
· Efficiency Ratios
Day 2
Fan Operation and Control
· Performance Range
· Fan Applications
· System Resistance Data/Curves
· Fan and System Interaction, Operating Point
· Fan and System Matching
· Effective Duct Length
· Fan Operating Modes
· Series Operation
· Parallel Operation
· Multi Staging
· Surging and Pulsation Problem
· Mechanics of Surging
· Solutions for Surging
· Fan Performance Regulation
· Types of Dampers
· Regulation by Outlet Damper
· Regulation by Inlet Damper
· Regulation by Inlet Box Damper
· Regulation by Speed Control
Day 3
Maintenance and Trouble Shooting
· Vibration:
· Vibration Sensitivity
· Maximum Operating Speed
· Torsional Vibration Analysis
· Vibration Severity Charts
· Shaft Design
· Impact Testing
· Duct Pulsation
· High Motor Temperature
· Noise
· Sound Pressure Level
· Poor Performance
· High Bearing Temperature
· Excessive Starting Time
· Cleaning systems
· Coupling Alignment
· Tolerances
· Balancing
· Permissible Residual Unbalance
· Balancing Quality Grades
· Lubrication
· Oil Lubrication
· Circulating Oil System
· Grease Lubrication
· Fan Bearing Types
· Erosion
· Dust Loading
· Particle and Gas Velocities
· Particulate Flow Rate
Day 4
Selection and Specifications
· AMCA
· Air Movement & Control Association International
· Standards and Codes
· Fan Selection
· Fan Selection Procedure
· Factors affecting Fan selection
· Manufacturer data and curves
· Performance Specifications
· Density/Volume Calculations
· Effect of Temperature on Fan Selection
· Effect of Fan Location in System
· Air System Specification
· Fan application and selection
· Drive Arrangements for Centrifugal fan
· Motors and Standards
· Inlet position for centrifugal fan
· Advantages and disadvantages of Fan types
· Fan Ratings
Day 5
Measurements and Testing
· AMCA Test Standards
· Certified Ratings Program
· Test Standards & Certified Ratings Seals
· Fan Performance Testing
· Impact Testing
· Balancing Testing
· Mechanical Run Test
· Pressure Test Procedure for Fan Casings
· In-House Sound Testing
· Measuring the Natural Frequency of Fan Components
