basics:building_physics_-_basics:thermal_bridges:tbcalculation:basic_principle_for_calculating_thermal_bridges
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basics:building_physics_-_basics:thermal_bridges:tbcalculation:basic_principle_for_calculating_thermal_bridges [2016/08/02 16:02] – [Example of a thermal bridge calculation] mschueren | basics:building_physics_-_basics:thermal_bridges:tbcalculation:basic_principle_for_calculating_thermal_bridges [2021/08/27 10:43] – [Boundary conditions for temperatures] corinna.geiger@passiv.de | ||
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===== Determining the thermal transmittance ===== | ===== Determining the thermal transmittance ===== | ||
- | The principle for calculating the linear thermal transmittance is depicted in the illustration below. The $\Psi$-value represents the difference between the thermally interrupted component and the uninterrupted component that is assumed for the balance. First the heat flow or the conductance $L_{2d}$ is determined by means of the heat flow simulation. To determine the $\Psi$-value, | + | The principle for calculating the linear thermal transmittance is depicted in the illustration below. The $\Psi$-value represents the difference between the thermally interrupted component and the uninterrupted component that is assumed for the balance. First the heat flow or the conductance $L_{2d}$ is determined by means of the heat flow simulation. To determine the $\Psi$-value, |
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* $\theta_e$ = −5 °C for outdoor air temperature | * $\theta_e$ = −5 °C for outdoor air temperature | ||
- | The Passive House Institute uses the following boundary conditions for the temperature in teh context of **[[certification: | + | The Passive House Institute uses the following boundary conditions for the temperature in the context of **[[certification: |
* $\theta_i$ = 20 °C for indoor air temperature | * $\theta_i$ = 20 °C for indoor air temperature |
basics/building_physics_-_basics/thermal_bridges/tbcalculation/basic_principle_for_calculating_thermal_bridges.txt · Last modified: 2022/02/15 19:12 by admin