Infrared Thermography Explained

Importance of Staying Updated with Emerging Technology in Risk Management

Keeping abreast of emerging technologies is crucial for risk management, ensuring that equipment operates efficiently and mitigating the risks of fires and other critical hazards.

Introduction to Infrared Thermography

Infrared thermography is a cutting-edge, non-destructive technique that has gained significant popularity for its ability to detect electrical problems and potential equipment breakdowns. Failing to identify, manage, and repair such issues promptly can lead to severe consequences, including unexpected shutdowns, property damage, increased operational costs, and business interruptions.

This technology assists risk managers, facilities managers, maintenance managers, and others in understanding their unique risk profiles and preparing for insurance renewals.

What is Infrared Thermography?

Infrared thermography involves using advanced thermal imagers to detect radiation and heat from objects. Since all objects above absolute zero emit some level of infrared radiation, which is invisible to the naked eye, infrared thermography captures this radiation, converts it into a temperature, and displays it as a thermal image called a thermogram. This image shows temperature variations using different colors or shades of gray.

How Does Infrared Thermography Work?

Infrared thermography works by employing trained professionals who use calibrated infrared cameras to detect hot spots and other issues in equipment or electrical components. These cameras typically have a lens, thermal sensor, processing electronics, mechanical housing, and an LCD display, along with special sensors sensitive to infrared radiation. The process involves:

• Detection: The camera detects radiation emitted from the object.
• Conversion: The radiation is converted into electrical signals.
• Processing: These signals are processed to create thermographic images, which display temperature variations with different colors or intensities.

For example, in a color thermogram, warmer areas might appear in red, while cooler areas show up in blue. Advanced cameras can provide precise temperature measurements from the images captured.

Applications of Infrared Thermography

Infrared thermography is used across various settings:

• Predictive Maintenance: Detects abnormalities in equipment, such as overheating components, indicating potential failures.
• Building Inspections: Identifies heat losses, moisture intrusion, and structural issues by visualizing temperature differences.
• Electrical Systems: Monitors electrical cabinets and components to detect hot spots from loose connections or overloaded circuits, preventing failures or fires.
• Fluid Systems: Detects blockages or leaks in pipelines by observing temperature variations.
• Roofing: Identifies wet insulation in flat roofs by spotting areas of heat retention.
• Risk Management: Helps risk managers implement predictive and preventative maintenance plans to reduce serious issues like fires, leaks, or machinery breakdowns.

Case Study: nVent

A notable example is nVent's partnership with Global Risk Consultants, where infrared thermography was implemented in their facilities. This technology helped identify abnormal temperatures and fire risks in equipment, allowing for swift mitigation of issues. As a result, nVent maintained a clean claims history and secured competitive insurance rates in a challenging property insurance market. More details are available in a recent webinar featuring nVent’s Director of Risk Management and Insurance.

Accuracy of Infrared Thermography

The accuracy of infrared thermography depends on the expertise of the thermographer and the quality of the imaging camera. High-end cameras, costing tens of thousands of dollars, can measure temperature with an accuracy of ±2% or better. Factors influencing accuracy include:

• Distance: Greater distances can lead to measurement errors.
• Emissivity: Different materials emit infrared radiation differently; correct emissivity settings are crucial.
• Atmospheric Conditions: Humidity, air temperature, and obstacles can affect readings.
• Camera Calibration: Regular calibration ensures maintained accuracy.

Benefits of Infrared Thermography

Infrared thermography offers several benefits:

• Non-Destructive Testing: It is a non-contact, non-invasive method that does not interfere with equipment operation, ensuring no downtime during inspections.
• Cost-Effectiveness: Early problem detection can prevent expensive breakdowns and maintenance, often delivering significant savings.
• Comprehensive View: Provides a holistic view of equipment or areas, making it easier to pinpoint issues.
• Speed: Allows for rapid assessment of large areas or multiple components.
• Improved Safety: Early detection of overheating can prevent accidents or fires.
• Documentation: Thermal images serve as visual records for insurance claims or maintenance history.

Conclusion

Infrared thermography is a valuable tool for maintaining operational efficiency and safety in various industries. By implementing this technology, businesses can better manage risks, reduce the likelihood of costly incidents, and ensure a safe working environment.