IR thermography applied to the assessment of thermal conductivity of building materials

P. Bison; E. Grinzato

doi:10.1117/12.849662

3 May 2010 IR thermography applied to the assessment of thermal conductivity of building materials

P. Bison, E. Grinzato

Proceedings Volume 7661, Thermosense XXXII; 76610G (2010) https://doi.org/10.1117/12.849662
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

Abstract

A device to measure thermal conductivity of small specimens is presented. The specimen is sandwiched between two thermoelectric cells, one sources heat the other sink it. An infrared camera looks at the device and specimen on its side, determining both the heat flux flowing through it and the temperature gradient due to the unknown thermal resistance. The thermal conductivity is quickly recovered, as soon as the steady thermal regime is reached. The heat flux toward the environment is evaluated and minimized working at zero mean temperature difference. A couple of specimens made of materials used to prepare radiant heating floor screeds are measured. The Maxwell model to determine the thermal conductivity of mixture, based on the knowledge of the conductivity of the different phases and their volume fraction, is used to interpret the results.

Citation Download Citation

P. Bison and E. Grinzato "IR thermography applied to the assessment of thermal conductivity of building materials", Proc. SPIE 7661, Thermosense XXXII, 76610G (3 May 2010); https://doi.org/10.1117/12.849662

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