Estimating Thermal Material Properties Using Step-Heating Thermography Methods in a Solar Loading Thermography Setup

Abstract

This work investigates solar loading thermography applications using active thermography algorithms. It is shown that active thermography methods, such as step-heating thermography, present good correlation with a solar loading setup. Solar loading thermography is an approach that has recently gained scientific attention and is advantageous because it is particularly easy to set up and can measure large-scale objects, as the sun is the primary heat source. This work also introduces the concept of using a pyranometer as a reference for the evaluation algorithms by providing a direct solar irradiance measurement. Furthermore, a recently introduced method of estimating thermal effusivity is evaluated on ambient-derived thermograms.

Keywords

• solar loading thermography
• step-heating thermography
• active thermography
• thermal effusivity
• linear effusivity fit
• infrastructure