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 127.0.0.1 | planning:thermal_protection:thermal_protection_works:insulation_increases_comfort_-_evidence_no.3_outdoor_thermography [2022/01/25 13:17] (current) – ggrosskopf | ||
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These IR images are rather revealing: | These IR images are rather revealing: | ||
- | * ** 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 bags have reached a temperature equilibrium with the outdoor air; therefore they neither give off heat nor do they absorb heat. |
* ** 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 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, | ||
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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. | * ** 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. | ||
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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 | ||
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\\ | \\ | ||
- | == Note on the tilted window == | + | ==== Note on the tilted window |
The following images illustrate the thermal effects around the tilted window in this building. They are both the same image, displaying different temperature ranges: | The following images illustrate the thermal effects around the tilted window in this building. They are both the same image, displaying different temperature ranges: | ||
* The image on the left only shows temperatures between 2 and 10 degrees Celsius, higher temperatures are displayed as white areas. | * The image on the left only shows temperatures between 2 and 10 degrees Celsius, higher temperatures are displayed as white areas. | ||
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* The image on the right shows temperatures between 2 and 20 degrees Celsius revealing the tilted window as well as the window sill (light purple). The temperature at the interior surface is close to 19°C. | * The image on the right shows temperatures between 2 and 20 degrees Celsius revealing the tilted window as well as the window sill (light purple). The temperature at the interior surface is close to 19°C. | ||
This example illustrates just how well the insulation works: Even with the window open, the interior surface of the wall stays warm even right next to the thermal bridge due to the window installation.\\ | This example illustrates just how well the insulation works: Even with the window open, the interior surface of the wall stays warm even right next to the thermal bridge due to the window installation.\\ |
planning/thermal_protection/thermal_protection_works/insulation_increases_comfort_-_evidence_no.3_outdoor_thermography.1411057157.txt.gz · Last modified: 2014/09/18 18:19 by 127.0.0.1