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9 April 2007 A nondestructive method for diagnostic of insulated building walls using infrared thermography
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This work deals with the development of an experimental protocol for the diagnostic of multi-layered insulated building walls. First, a test bench is set up in order to measure front and back sides temperatures of standard panels. The panels considered have insulation thicknesses of 2, 6 and 10cm. The front side is heated by two halogen lamps of 500W. A CEDIP Jade Long wave infrared camera and thermocouples are used to carry out temperature measurements. In a second time, a one dimensional model based on thermal quadruples and Laplace transforms was developped under Matlab environment. Also, we developped a three dimensional model based on finite volumes using Fluent computational code. Finally, a method of identification of physical parameters is implemented by performing least square minimization based on Levenberg-Marquardt method. The experimental measurements are compared to theoretical results and by minimization we obtain thermal conductivity and diffusivity as well as thickness of the two layers.
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Mohamed H. A. Larbi Youcef, Atef Mazioud, Pierre Bremond, Laurent Ibos, Yves Candau, Michel Piro, and Alain Filloux "A nondestructive method for diagnostic of insulated building walls using infrared thermography", Proc. SPIE 6541, Thermosense XXIX, 65410L (9 April 2007);

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