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--- basics:building_physics_-_basics:what_defines_thermal_bridge_free_design [2018/06/18 10:17] – cblagojevic
+++ basics:building_physics_-_basics:what_defines_thermal_bridge_free_design [2019/02/13 11:50] – cblagojevic
@@ Line 8: / Line 8: @@
 <WRAP centeralign >
-$$H_{T} = \sum_{i}A_{i}U_{i}+\sum_{k}l_{k}\varPsi_{k}+\sum_{j}\chi_{j}$$
+<latex>
+\Large{H_{T} = \sum_{i}A_{i}U_{i}+\sum_{k}l_{k}\varPsi_{k}+\sum_{j}\chi_{j}}
+</latex>
 </WRAP>
  “Thermal bridge free design” can be defined as follows: the contributions provided by thermal bridging are smaller than or equal to zero:
 <WRAP centeralign  box round >
-$$\sum\varPsi \cdot l + \sum\chi  \leq 0$$\\
+<latex>
+\Large{\sum\varPsi \cdot l + \sum\chi  \leq 0}
+</latex>\\
+\\
+\\
 ** [defined as thermal bridge free]**
 </WRAP>
@@ Line 19: / Line 25: @@
 It will then be admissible to disregard the thermal bridge effects in the PHPP, thus simplifying the calculation quite considerably. This equates to the statement $ \Delta U_{WB} \leq 0$, where $\Delta U_{WB}$ is the thermal bridge correction addend (as used in the German energy saving regulations for example)\\
-[{{ :picopen:huelle_passivhaus_mit_logo.png?nolink350|Due to thermal bridge free design, the heat losses through the thermal bridges can be reduced so much that they do not have to be taken into account in the energy balance.}}]
 =====  Simplified criterion =====
@@ Line 26: / Line 30: @@
 Verification using this definition of thermal bridge free design would imply that all details would have to be calculated in a multi-dimensional way. Therefore, simplified criteria for “thermal bridge free design” should be devised. It was found that for ordinary building geometries, the “thermal bridge free” requirement was almost always adequately met for all linear disturbances only if
 <WRAP centeralign  box round >
-$$\varPsi \leq 0.01 \quad W/(mK)$$ **[TbCrit]**
+<latex>
+\Large{\varPsi \leq 0.01 \quad W/(mK)}
+</latex>
+\\
+**[TbCrit]**
 </WRAP>
 These may still result in certain positive contributions, which can however be regarded as "negligibly small".\\