Conference paper Open Access

Determination method of thermal conductivity of building parts in situ through ir imaging by minimizing the influence of environmental parameters,

G.-Fivos Sargentis; A. Chatzimpiros; N. Symeonidis


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    <subfield code="u">National Technical University of Athens</subfield>
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    <subfield code="a">G.-Fivos Sargentis</subfield>
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    <subfield code="a">Determination method of thermal conductivity of building parts in situ through ir imaging by minimizing the influence of environmental parameters,</subfield>
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    <subfield code="a">&lt;p&gt;Infrared imaging is a non destructive method, which determines the thermal behaviour of &amp;nbsp;building materials in situ. Through infrared imaging, thermal bridges, moisture absorbed &amp;nbsp;by buildings&amp;rsquo; materials as well as other parameters related to a building&amp;rsquo;s thermal and &amp;nbsp;energy behaviour can be determined. &amp;nbsp;&lt;/p&gt;

&lt;p&gt;A building&amp;rsquo;s heat losses can be distinguished into conduction losses through its envelope &amp;nbsp;and losses due to ventilation and infiltration. Losses through a building&amp;rsquo;s envelope are &amp;nbsp;related to the thermal resistance of its different parts and components used. In order that &amp;nbsp;the thermal resistance (R) of the building&amp;rsquo;s parts is determined, the parameter 1/&amp;alpha;&amp;alpha;, &amp;nbsp;(thermal resistance of the exterior surface), which depends on meteorological conditions, &amp;nbsp;should be determined. This work presents a method for the calibration necessary to &amp;nbsp;calculate the thermal resistance (R) of different parts of the building&amp;rsquo;s envelope. &amp;nbsp;Through the application of this method the thermal behaviour of unknown materials in &amp;nbsp;buildings can be determined in situ. &amp;nbsp;&lt;/p&gt;</subfield>
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