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- Heating load in Passive Houses
- only about 10% of the energy used in conventional buildings. This has been verified time and again in field measurements: by building to the Passive House Standard, it is actually pos... y savings as high as 90% compared to conventional buildings [AkkP-28]. Yet a particular building’s exact heating demand, guaranteed to be low in any case, is really s
- Definition and effects of thermal bridges @basics:building_physics_-_basics:thermal_bridges
- \ A **thermal bridge** is a localised area of the building envelope where the heat flow is different (usuall... rst case this can lead to moisture penetration in building components and mould growth. * **Altered**, ... enter round box 60%> If the criteria for [[basics:building_physics_-_basics:what_defines_thermal_bridge_free... alculating the heat energy balance.\\ \\ [[basics:building_physics_-_basics:what_defines_thermal_bridge_free
- What defines thermal bridge free design?
- hat defines thermal bridge free design? ====== A building envelope is considered to be free of thermal brid... ssion losses under consideration of all [[basics:building_physics_-_basics:thermal_bridges:thermal_bridge_d... nal surfaces and regular U-values of the standard building elements alone. Regularly occurring thermal bridges in standard building components must already be taken into account in
- Thermal bridge calculation @basics:building_physics_-_basics:thermal_bridges
- ====== Thermal bridge calculation ====== [[basics:building_physics_-_basics:thermal_bridges:thermal_bridge_d... entifying in more detail the heat losses from the building envelope. In highly efficient buildings such as Passive Houses, the influence of these losses has to be min... d. In ideal cases this is referred to as [[basics:building_physics_-_basics:what_defines_thermal_bridge_free
- Special features and characteristics of components in contact with the ground @basics:building_physics_-_basics:thermal_bridges:tbcalculation:ground_contact
- it is helpful if the effect of the ground on the building envelope is known, especially in terms of setting... h the ground ===== The thermal interactions of a building with its surroundings are very complex. This app... Heat flow through the individual components of a building is determined by the temperature difference betwe... cause the condition of the surfaces bordering the building (pathways, car parking, lawns etc.) is usually un
- Adaptive versus Heat Balance Comfort Models @basics:building_physics_-_basics:thermal_comfort
- y field studies, mostly in air-conditioned office buildings in which the predicted comfort temperatures have... s considered comfortable by users of free-running buildings because they can adapt to varying boundary condi... luence the comfort temperature of people inside a building could not be found in any study. People do, of co... the exterior temperatures for non-air-conditioned buildings), a fact that is already accounted for by the he
- Local thermal comfort @basics:building_physics_-_basics:thermal_comfort
- ng thermal insulation (regardless of the external building component to which it is applied) the heat flow f... is reduced. * Therefore the heat flow from the building’s interior to the internal surface of this external building component is also reduced. The heat flow overcome... uences are that with very well-insulated external building components, **the temperature of the interior sur
- Thermal comfort
- ====== Thermal comfort ====== Passive Houses are buildings that need very little energy to achieve a comfor... conditioning system. An extremely well insulated building envelope as well as triple glazed windows ((The g... nformation on the following topics:**\\ [[basics:building_physics_-_basics:thermal_comfort:Thermal_comfort_in_Passive_House_Building|Thermal comfort in Passive House buildings 1 ]]
- Thermal comfort parameters @basics:building_physics_-_basics:thermal_comfort
- l Practice: For comparison, here is a typical old building's window. The center of glass surface temperature... thermal insulation (regardless of which external building building component, e.g. wall, roof, floor, etc.) the heat flow from the inside to the outside is reduced. ... oom area to the interior surface of this external building component is also reduced. That heat flow has to
- Basic principle for calculating thermal bridges @basics:building_physics_-_basics:thermal_bridges:tbcalculation
- it is first necessary to model the corresponding building component connections for a heat flow program. Th... ecisive for the calculation of thermal bridges in building engineering. The calculations of the $\Psi$-value... educted from the conductance of the uninterrupted building component. It is essential that the linear refere... long as there is a temperature decline due to the building component. In practical terms, the same temperatu
- Examples of thermal bridge calculations @basics:building_physics_-_basics:thermal_bridges:tbcalculation
- ==== Regular thermal bridges: ==== * [[basics:building_physics_-_basics:thermal_bridges:tbcalculation:ba... ation ]] ==== Themal bridges in ground-touching building components:==== * [[basics:building_physics_-_basics:thermal_bridges:tbcalculation:examples:ewfs]] * [[basics:building_physics_-_basics:thermal_bridges:tbcalculation:ex
- Unheated basement @basics:building_physics_-_basics:thermal_bridges:tbcalculation:examples
- ation of the basement from the heated part of the building is necessary. In energy balances the unheated bas... i}$ factor based on steady-state calculations for building components in contact with the ground is reliable... In addition, in the context of certification of a building component, the size of the basement later on is n... e given here. ===== See also ===== * [[basics:building_physics_-_basics:thermal_bridges:tbcalculation|Th
- Heat transfer
- nergy across a thermodynamic system boundary (the building envelope in the case of a Passive House building) as a result of a temperature difference. The energy trans... portant transfer mechanism for the heat losses of buildings: Envelope components (like a window or a roof) a... transfer capacity of the envelope surface of this building component: this is the thermal transmittance coef
- Exterior wall on floor slab @basics:building_physics_-_basics:thermal_bridges:tbcalculation:examples
- the calculation model, it should be checked which building component layers are relevant for the calculation... conductance $L_{2d}$. If the actual size of the building is not known, B‘ can be selected for the option B... $$ </WRAP> ===== See also ===== * [[basics:building_physics_-_basics:thermal_bridges:tbcalculation|Thermal bridge calculation]] * [[basics:building_physics_-_basics:thermal_bridges:tbcalculation:gr
- Heated basement @basics:building_physics_-_basics:thermal_bridges:tbcalculation:examples
- ccording to the figure above, the U-values of the building components that are relevant for determining the ... is using an additional calculation. For this, the building components in contact with the ground are depicte... lculations.// ===== See also ===== * [[basics:building_physics_-_basics:thermal_bridges:tbcalculation|Thermal bridge calculation]] * [[basics:building_physics_-_basics:thermal_bridges:tbcalculation:th
- Interior walls on floor slabs @basics:building_physics_-_basics:thermal_bridges:tbcalculation:examples