Ha ha, good point. I was recently shocked to find out that European insulation manufacturers are required to add a "safety" factor to the conductivity value k after the innitial laboritory tests of in the region of 20 to 30%! Great for the heating season, not good for cooling season calculations. All that effort using programs like THERM to get "real" u-values including for thermal bridging, and then they go and do that! Despite that the manufacturing processes in Germany are so good and turn out such a uniform product. I had a mini-crisis.
This was during an IR-Camera refresher course, where we were discussing the plausibility of deturmining u-values using the camera. It was interesting, as I recently had to try it for a electrical life safety switchgear room which was predicted to overheat in summer.
Mit freundlichen Grü�en- Sent from my iPhone (excuse the brevity)
i. A.
Jean Marais
b.i.g. bechtold
Tel. +49 30 6706662-23
On 18.05.2015, at 21:54, "Julien Marrec julien.marrec@xxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:
Hi,I don't think it differs from any other materials. You just need to find the physical property of each material (thermal conductivity, mass, etc) and input that in E+. Then create constructions based on those materials.I'm quite sure there is literature on the subject. The only thing is that literature might define ranges, or there might be differences between sources, as the actual properties of these materials depends on the know-how or "recipe" of the person creating it. It won't be as definitive as looking at a spec sheet for a particular brand of fiberglass batts.It's the same for concrete by the way... Even ashrae tells you that light concrete is between x and y, not some absolute value.Good luckBest,Julien
Envoyé de mon iPhone
Le 18 mai 2015 à 18:16, "ana5patil@xxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx> a écrit :I am trying to know the thermal transfer through roof and wall elements and relate it to thermal comfort for the building blocks which are constructed using traditional building materials.
My questions are,
How to create building elements using traditional building materials. For example, Rat-trap bond wall, mud block wall, conical clay tiles used for roof with cement mortar covering with china clay tiles.
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