Page 1 Sraj- Fluke India IG Division CII, Chennai Company Confidential 1 Thermography Study for Maintenance, Safety & Energy Efficiency September 04,2010 CII, Chennai Infrared Thermography Sraj – Fluke India- IG Division CII, Chennai Company Confidential 2 What is Thermography? • The use of electronic “cameras” to detect radiant energy or heat • Produces a visual image called a thermogram (or heat picture) • Thermography is a powerful tool for machine and building maintenance
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Sraj- Fluke India IG Division CII, Chennai Company Confidential 1
Thermography Study for Maintenance, Safety & Energy Efficiency
September 04,2010CII, Chennai
Infrared Thermography
Sraj – Fluke India- IG Division CII, Chennai Company Confidential 2
What is Thermography?
• The use of electronic “cameras”to detect radiant energy or heat
• Produces a visual image called a thermogram (or heat picture)
• Thermography is a powerful tool for machine and building maintenance
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Heat & Energy
• As an object warms up, it radiates more energy, as photons, based on:– Temperature– Emissivity
• Infrared radiation is electromagnetic radiation, similar to light and radio waves
• Wavelengths between 2-15 microns are called thermal infrared radiation
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Heat Transfer • Heat is transferred
from warmer areas to cooler areas by:– Conduction (in solids)– Convection (in fluids)– Radiation (mainly from
surfaces)
• Heat flow can be either:– Transient – Steady-state
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Primary Applications• Maintenance of machinery | Electrical
Maintenance• Building diagnostics• Fire fighting• Law enforcement and security• Environmental• Human and animal medicine• Many others….
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Thermography in Maintenance- Preventive maintenance best practices
Preventive Maintenance: Often called “calendar-based maintenance”. Repairs or maintenance actions are taken on machinery on a scheduled basis, regardless of actual condition of equipment.
Pros Cons
50% of electrical failures can be prevented with regular maintenance and inspection
Fault free machines are serviced unnecessarily
Increased equipment life More labor intensive than reactive
Reduced equipment failure
More predictable staffing schedule
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Thermography in Maintenance- Mortality of Machinery
• Detect early defects• Prolong life time of equipment• Prevent costly aging failures
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Thermography in Maintenance- Electrical
Hot phase
Fuse disconnect
SubstationMotor Control Center
BussLighting Circuit
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Thermography in Maintenance- Electromechanical & Mechanical
Compressors - normal
Hydraulic pumps Misaligned beltElectric motor
Roller bearingsCoupling
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Thermography in Safety-Fast, Safe & Accurate Measurements
for objects that are:
• moving or very hot
• difficult to reach • impossible to
shut-off• dangerous to
contact• Contaminated/alt
ered through contact
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• FR long sleeved shirt with sleeves rolled down and front fully buttoned up• FR work pants (not denims) or coveralls over natural fiber• 600 V rated leather over rubber gloves• Leather work boots• Switching hood containing hearing protection • No jewelry or watch
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Thermography is Safe use• Most defects cause increase in temperature• Thermal imaging provides a fast and clear picture of this
temperature increase• Thermal images can be taken while production is running
without any contact à safe!• Anybody can take a picture
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Thermography in SafetyElectrical
Get a full thermal picture of objects to better pinpoint where heat waste is occurring.
No Contacts & safe to conduct the inspection
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Thermography in Energy EfficiencyBuilding
•Hot or cold air infiltration• Improper air flow• Insulation Voids•Poor construction, missing or inadequate insulation, broken window seals, moisture intrusion and air leakage
•Here are images showing lack of proper insulation
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Thermography in Energy EfficiencyIt’s not just about energy loss!
• Excessive leakage can also cause condensation to form within and on walls which can create many problems:
– Permanently damage insulation– Seriously degrade materials– Rot wood– Corrode metals – Stain brick, concrete or surfaces– Extreme cases will cause concrete to spall, bricks to separate,
mortar to crumble and sections of wall to fall– Corrode structural steal, re-bar and metal hangers and bolts
All have very serious safety and maintenance issues!
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Thermography in Energy EfficiencyEvaluating System Efficiency – to improve Energy Efficiency
Conduct a thermal inspection of all significant electrical panels, switchgear, and transformers
Look for hot spots that could indicate high resistance or malfunctioning connectors
These:• Waste energy• Indicate potentially larger
inefficiencies that can be corrected with maintenance
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Thermography in Energy EfficiencyConduct the Energy Audit
Savings
$$$ Biggest Opportunities
$$ Medium Opportunities
$ Smaller long-term Opportunities
Electric Utility, IT/ComputersElectric Utility, IT/Computers
HVAC,Motors & Drives
HVAC,Motors & Drives
Lighting, Compressed Air, Steam Systems
Lighting, Compressed Air, Steam Systems
$
$
$
$$
$$$
$$$
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Fluke’s Solution on Energy A Complete Kit
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Wherever you go, you’ll find Fluke test tools at work
