Thermal analysis of overground bound constructions
2011
Liepins, S., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Rural Engineering | Strausa, S., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Rural Engineering | Iljins, U., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Information Technologies. Dept. of Physics | Gross, U., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Information Technologies. Dept. of Physics
Thermographic cameras are widely used for inspecting and analyzing surfaces of overground bound constructions. The method demonstrates a complete image of thermal spots and is suitable for giving limited conclusions about the whole surface temperature of the bound construction. The main problem of infrared analysis is exact temperature layout, because different heat transmission areas can be seen on the screen, but heat radiation levels are not so reliable. Such temperature differences can exceed even 50% of the real surface temperature. To explore more accurate surface point temperatures special thermal sensors and sensor types were applied. By point type infrared and thermo-couple device temperature distribution points on building material surface were gathered, compared and calibrated with the infrared camera output image. With heat flow and attachable temperature sensors, the material surface and surrounding temperatures were analyzed in an extended period. Also mathematical temperature curves were calculated to prove the temperature distribution on the surface. All samples for practical research were made at the Tenax factory, located in Dobele, Latvia. The manufacturer of these samples gave heat properties to compare with the experimental data. By using the above mentioned methods, exact temperature loads can be defined and calculated; these methods are also suitable for analyzing heat transmission of overground bound constructions.
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