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basics:building_physics_-_basics:what_defines_thermal_bridge_free_design [2018/11/29 13:23] cblagojevicbasics:building_physics_-_basics:what_defines_thermal_bridge_free_design [2019/02/21 09:59] cblagojevic
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 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)\\ 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)\\
  
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-[{{ :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 ===== =====  Simplified criterion =====
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 [{{:picopen:wbfrei_fusspunkt.png?280|Example showing the thermal bridge free connection of the rising exterior masonry wall to the insulated floor slab (with indication of the reference dimension; as agreed, the exterior reference dimension is always used).The heat transfer coefficients were calculated for this detail depending on the base point block used here (based on [AkkP 16]}}] [{{:picopen:wbfrei_fusspunkt.png?280|Example showing the thermal bridge free connection of the rising exterior masonry wall to the insulated floor slab (with indication of the reference dimension; as agreed, the exterior reference dimension is always used).The heat transfer coefficients were calculated for this detail depending on the base point block used here (based on [AkkP 16]}}]
  
-[{{:picopen:psi_waermebruecke_fusspunkt_aussenwand.png?400|Dependence of the linear thermal transmittance (Ψ-value) on the thermal conductivity λ of the base point block. If this is smaller than 0.25 W/(mK), then Ψ ≤ 0.01 W/(mK) and consequently the detail will be thermal bridge free. This criterion is indicated by a horizontal blue line. However, one can also see that substantial thermal bridge losses can result with "normal blocks" (λ >0.8 W/(mK)) (taken from **[AkkP 16]**).}}]+[{{:picopen:psi_waermebruecke_fusspunkt_aussenwand.png?400|Dependence of the linear thermal transmittance (Ψ-value) on the thermal conductivity λ of the base point block. If this is smaller than 0.25 W/(mK), then Ψ ≤ 0.01 W/(mK) and consequently the detail will be thermal bridge free. This criterion is indicated by a horizontal blue line. However, one can also see that substantial thermal bridge losses can result with "normal blocks" (λ >0.8 W/(mK)) (taken from [[basics:building_physics_-_basics:what_defines_thermal_bridge_free_design?#Literature|[AkkP 16] ]]}}]
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basics/building_physics_-_basics/what_defines_thermal_bridge_free_design.txt · Last modified: 2022/02/15 19:13 by admin