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planning:thermal_protection:thermal_protection_works:insulation_increases_comfort_-_evidence_no.3_outdoor_thermography

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planning:thermal_protection:thermal_protection_works:insulation_increases_comfort_-_evidence_no.3_outdoor_thermography [2014/09/18 18:19] – external edit 127.0.0.1planning:thermal_protection:thermal_protection_works:insulation_increases_comfort_-_evidence_no.3_outdoor_thermography [2019/01/31 09:44] – [Applying exterior insulation] cblagojevic
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   * ** The outdoor air temperature is approx. 6.46 °C ** as measured at the surface of the bags hanging from the scaffolding. The surfaces of these bas have reached a temperature equilibrium with the outdoor air; therefore they neither give off heat nor do they absorb heat.      * ** The outdoor air temperature is approx. 6.46 °C ** as measured at the surface of the bags hanging from the scaffolding. The surfaces of these bas have reached a temperature equilibrium with the outdoor air; therefore they neither give off heat nor do they absorb heat.   
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   * ** The temperatures measured for the areas of the facade that have already been insulated are very uniform** and rather similar to that recorded for the bags – rendering the bags barely noticeable in the thermal image. Nevertheless, the insulated surface is slightly warmer than the surrounding objects. Since the thermal image was taken before sunrise, direct or indirect sunlight would not be the cause for the slightly higher temperatures of 6.81 °C on average.  In fact, the temperature difference is due to small heat losses which remain even with the wall being insulated. The uniform image in the area that has already been insulated is a good sign, showing that the insulation has been properly applied.   * ** The temperatures measured for the areas of the facade that have already been insulated are very uniform** and rather similar to that recorded for the bags – rendering the bags barely noticeable in the thermal image. Nevertheless, the insulated surface is slightly warmer than the surrounding objects. Since the thermal image was taken before sunrise, direct or indirect sunlight would not be the cause for the slightly higher temperatures of 6.81 °C on average.  In fact, the temperature difference is due to small heat losses which remain even with the wall being insulated. The uniform image in the area that has already been insulated is a good sign, showing that the insulation has been properly applied.
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    * ** The facade areas of the heated upper floor which have not yet been insulated have a much higher average temperature of 9.14 °C. Moreover, their temperatures are not uniform.** This is due to a number of reasons: In some areas, significant heat losses are caused by thermal bridges – e.g. at the edge of the window where the heat only travels a short distance the masonry. In other areas, furniture is positioned along the external walls serving as partial interior insulation and reducing the temperature in these areas.  Incidentally, the temperature of the interior wall surface behind the furniture is also lower – which may cause severe problems (see [[planning:thermal_protection:thermal_protection_works:insulation_prevents_structural_damage_evidence_no.4_measurements_in_a_retrofit#Problems due to moisture build-up|Problems due to moisture build-up]]). Therefore, furniture should not be placed directly next to poorly insulated exterior walls.      * ** The facade areas of the heated upper floor which have not yet been insulated have a much higher average temperature of 9.14 °C. Moreover, their temperatures are not uniform.** This is due to a number of reasons: In some areas, significant heat losses are caused by thermal bridges – e.g. at the edge of the window where the heat only travels a short distance the masonry. In other areas, furniture is positioned along the external walls serving as partial interior insulation and reducing the temperature in these areas.  Incidentally, the temperature of the interior wall surface behind the furniture is also lower – which may cause severe problems (see [[planning:thermal_protection:thermal_protection_works:insulation_prevents_structural_damage_evidence_no.4_measurements_in_a_retrofit#Problems due to moisture build-up|Problems due to moisture build-up]]). Therefore, furniture should not be placed directly next to poorly insulated exterior walls.  
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   * ** The heat emitted by an object is roughly proportional to the temperature difference between this object and the outdoor air temperature**. \\ In this case, the difference is:\\   * ** The heat emitted by an object is roughly proportional to the temperature difference between this object and the outdoor air temperature**. \\ In this case, the difference is:\\
 for the uninsulated wall: 9.14 – 6.46 = 2.68 degrees for the uninsulated wall: 9.14 – 6.46 = 2.68 degrees
planning/thermal_protection/thermal_protection_works/insulation_increases_comfort_-_evidence_no.3_outdoor_thermography.txt · Last modified: 2022/01/25 13:17 by ggrosskopf