Fulltext results:
- Definition and effects of thermal bridges
- === ===== Thermal bridges - Introduction ===== Heat makes its way from the heated space towards the o... calised area of the building envelope where the heat flow is different (usually increased) in comparis... rowth. * **Altered**, usually increased, **heat losses**.\\ \\ Both effects of thermal bridges ca... urface temperatures are then so high everywhere that critical levels of moisture cannot occur any long
- Special features and characteristics of components in contact with the ground @basics:building_physics_-_basics:thermal_bridges:tbcalculation:ground_contact
- onents with ground contact does not differ from that for other thermal bridges. However, it is helpful... re and thermal conductivity of the ground ==== Heat flow through the individual components of a build... case of components in contact with the ground, heat flow depends on the temperature field prevailing ... ground surface. In **AkkP 27** it is suggested that on average the surface temperature is about 1 K h
- Basic principle for calculating thermal bridges @basics:building_physics_-_basics:thermal_bridges:tbcalculation
- responding building component connections for a heat flow program. The individual thermal conductiviti... rmore, boundary conditions for temperatures and heat transfer resistances should be selected. The norm... upted 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
- Recommended procedure for calculating thermal bridges of components in contact with the ground @basics:building_physics_-_basics:thermal_bridges:tbcalculation:ground_contact
- EN ISO 10211** is recommended. Calculating the heat losses through the ground in the Ground worksheet... EN ISO 13370. On the other hand, this requires that thermal bridges should be determined in accordanc... 10211. The main advantage of this procedure is that the influence of the ground is also depicted. The... ground must be determined through an additional heat flow simulation. In doing so, exactly the same di
- Unheated basement @basics:building_physics_-_basics:thermal_bridges:tbcalculation:examples
- floor area, but it does represent an additional heat transfer resistance between the heated interior s... ISO 13370, Section 9.4** </WRAP> $U_f$ is the heat transfer resistance of the basement ceiling. $U_{... loor slab and the heated basement. The required heat flow from the heated space consists of the conduc... e use of $L_{ue}$ it is possible to express the heat flow or the conductance using the following equat
- Software for calculating thermal bridges @basics:building_physics_-_basics:thermal_bridges:tbcalculation
- ess of the materials}\\ \dot{q}\qquad&\text{any heat sources and heat sinks} \end{align} </WRAP> It is not possible to solve this partial differential eq... sional with constant boundary conditions and no heat sources/sinks, an already known analytical soluti... in energy balancing for taking into account the heat losses from regular building components. For calc
- Exterior wall on floor slab @basics:building_physics_-_basics:thermal_bridges:tbcalculation:examples
- including the exterior wall) //[Note: With some heat flow software programs the dimensions in the mode... igh as the area to be examined. It is essential that the length is measured based on the exterior references, that is, up to the lower edge of the perimeter insulat... block of earth should be modelled with a size of at least $2{,}5 \cdot B'$. In the following illustr
- Thermal bridge calculation
- t instrument for identifying in more detail the heat losses from the building envelope. In highly effi... ferred to as [[basics:building_physics_-_basics:what_defines_thermal_bridge_free_design|thermal bridge... ns or thermal bridge free design]]. Besides the heat losses, surface temperatures can also be determined with the aid of heat flow simulations, which allow conclusions to be d
- Heated basement @basics:building_physics_-_basics:thermal_bridges:tbcalculation:examples
- nce is given below. Here it should be mentioned that in the Ground worksheet of the [[planning:calcula... above, the U-values of the building components that are relevant for determining the Ψ-value can be a... must be calculated in accordance with Option B, that is using an additional calculation. For this, the... sed here also for determining the Ψ-values. The heat flows and necessary lengths can be entered here a
- Interior walls on floor slabs @basics:building_physics_-_basics:thermal_bridges:tbcalculation:examples
- uctance with the interior wall taken into account at the corresponding point. However, this requires a... on for a construction system, it is recommended that the ground is taken into account and the distance... without the interior wall. Another advantage is that the surface temperatures determined in this way w... lation]] * [[basics:building_physics_-_basics:what_defines_thermal_bridge_free_design]] * [[basics