Fulltext results:
- Definition and effects of thermal bridges @basics:building_physics_-_basics: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
- Heating load in Passive Houses
- ow in any case, is really secondary to ensuring that a Passive House building functions properly. \\ ... oad is the decisive factor: a certain amount of heat can be distributed with very little effort via th... eating) and reduces the investment required for heat distribution to a minimum. These cost savings can... ntilation system itself. However, the amount of heat that can be distributed via the fresh air system
- Heat transfer
- ====== Heat transfer ====== Heat transfer is the transfer of thermal energy across a thermodynamic system bounda... ergy transferred in this way is referred to as "heat". The direction of heat transfer is always from a warmer area towards a colder area, in other words:
- 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
- Thermal comfort parameters @basics:building_physics_-_basics:thermal_comfort
- ow surface and room air, the speed of air sinking at the window is small. At the floor, approximately 10 cm horizontally from the passive house window (U=... Optimal thermal comfort is established when the heat released by the human body is in equilibrium with its heat production. **Fanger's comfort equation** is deri
- 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
- Local thermal comfort @basics:building_physics_-_basics:thermal_comfort
- Local thermal comfort ====== It is interesting that all comfort criteria are automatically fulfilled ... building component to which it is applied) the heat flow from the inside to the outside is reduced. * Therefore the heat flow from the building’s interior to the internal... xternal building component is also reduced. The heat flow overcomes the so-called thermal resistance o
- 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
- What defines thermal bridge free design?
- ====== What defines thermal bridge free design? ====== A building envelope is considered to be free o... ar U-values ([[basics:building_physics_-_basics:what_defines_thermal_bridge_free_design?#Literature|[A... .png?300|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
- Adaptive versus Heat Balance Comfort Models @basics:building_physics_-_basics:thermal_comfort
- ====== Adaptive versus Heat Balance Comfort Models ====== \\ Author: Jürgen Schnieders, Passive Hous... of thermal comfort is given in [ASHRAE 55] as ”that condition of mind that expresses satisfaction with the thermal environment“. There is general agreement that the main external physical parameters which deter
- 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 comfort
- al comfort ====== Passive Houses are buildings that need very little energy to achieve a comfortable ... ames keep the desired warmth in and undesirable heat out. This means that the floor and all interior walls stay at the same pleasant temperature - year round.\\ \\ |{{:picopen
- Thermal bridge calculation @basics:building_physics_-_basics:thermal_bridges
- 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