Infrared Thermography Thermography Study for Maintenance, Safety & Energy Efficiency September 04,2010 CII, Chennai Sraj- Fluke India IG Division CII, Chennai Company Confidential 1 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 Sraj – Fluke India- IG Division CII, Chennai Company Confidential 2 Page 1 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 215 microns are called thermal infrared radiation Sraj – Fluke India- IG Division CII, Chennai Company Confidential 3 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 Sraj – Fluke India- IG Division CII, Chennai Company Confidential 4 Page 2 Primary Applications • Maintenance of machinery | Electrical Maintenance • Building diagnostics • Fire fighting • Law enforcement and security • Environmental • Human and animal medicine • Many others…. Sraj – Fluke India- IG Division CII, Chennai Company Confidential 5 IR Camera • Lens • Detector • Processing electronics • Controls • Image display • Image storage Sraj – Fluke India- IG Division CII, Chennai Company Confidential 6 Page 3 Thermography in Maintenance - Preventive maintenance best practices Preventive Maintenance: Often called “calendarbased 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 Sraj – Fluke India- IG Division CII, Chennai Company Confidential 7 Thermography in Maintenance - Mortality of Machinery • • • Detect early defects Prolong life time of equipment Prevent costly aging failures Sraj – Fluke India- IG Division CII, Chennai Company Confidential 8 Page 4 Thermography in Maintenance - Electrical Hot phase Motor Control Center Substation Lighting Circuit Fuse disconnect Buss Sraj – Fluke India- IG Division CII, Chennai Company Confidential 9 Thermography in Maintenance - Electromechanical & Mechanical Electric motor Hydraulic pumps Compressors - normal Coupling Sraj – Fluke India- IG Division CII, Chennai Misaligned belt Roller bearings Company Confidential 10 Page 5 Thermography in SafetyFast, 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 Sraj – Fluke India- IG Division CII, Chennai Company Confidential 11 Safety NEPA – 70E Hazard/Risk Category 2: 240 – 600V electrical environments • • • • • • 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 Sraj – Fluke India- IG Division CII, Chennai Company Confidential 12 Page 6 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 Sraj – Fluke India- IG Division CII, Chennai Company Confidential 13 Thermography in Safety Electrical Get a full thermal picture of objects to better pinpoint where heat waste is occurring. No Contacts & safe to conduct the inspection Sraj – Fluke India- IG Division CII, Chennai Company Confidential 14 Page 7 Thermography in Energy Efficiency Building • 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 Sraj – Fluke India- IG Division CII, Chennai Company Confidential 15 Thermography in Energy Efficiency It’s not just about energy loss! s! e u to • Excessive leakage can also cause condensation iss form within and on walls which can create ce many an problems: n e int – Permanently damage insulation a m – Seriously degrade materials nd a – Rot wood ty e f a – Corrode metals ss u – Stain brick, concrete io or surfaces er will cause concrete to spall, bricks to separate, s – Extreme cases y mortar etor crumble and sections of wall to fall v e structural steal, re-bar and metal hangers and bolts – Corrode av ll h A Sraj – Fluke India- IG Division CII, Chennai Company Confidential 16 Page 8 Thermography in Energy Efficiency Evaluating 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 Sraj – Fluke India- IG Division CII, Chennai Company Confidential 17 Thermography in Energy Efficiency Conduct the Energy Audit Savings Electric Utility, IT/Computers $$$ Biggest Opportunities $$ Medium Opportunities $ Smaller long-term Opportunities $$ HVAC, Motors & Drives $ $$$ $$$ Lighting, Compressed Air, Steam Systems $ $ Sraj – Fluke India- IG Division CII, Chennai Company Confidential 18 Page 9 Fluke’s Solution on Energy A Complete Kit Sraj – Fluke India- IG Division CII, Chennai Company Confidential 19 Wherever you go, you’ll find Fluke test tools at work Sraj – Fluke India- IG Division CII, Chennai Company Confidential 20 Page 10
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