Fulltext results:
- Heating load in Passive Houses
- e energy used in conventional buildings. This has been verified time and again in field measurements: ... ar building’s exact heating demand, guaranteed to be low in any case, is really secondary to ensuring ... the decisive factor: a certain amount of heat can be distributed with very little effort via the suppl... ibution to a minimum. These cost savings can then be reinvested in energy efficiency measures, includi
- What defines thermal bridge free design?
- ign? ====== A building envelope is considered to be free of thermal bridges if the transmission losse... dges in standard building components must already be taken into account in the regular U-values ([[bas... , 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}}] \\ The over
- Heated basement @basics:building_physics_-_basics:thermal_bridges:tbcalculation:examples
- nnections ($\Psi_{upper}$ und $\Psi_{lower}$) can be examined separately for the criterion relating to absence of thermal bridges. {{ :picopen:beheizter_keller_abb_1.png?400 |}} The procedure fo... e mentioned linear thermal transmittance is given below. Here it should be mentioned that in the Ground worksheet of the [[planning:calculating_energy_eff
- Adaptive versus Heat Balance Comfort Models @basics:building_physics_-_basics:thermal_comfort
- l comfort is achieved if the body temperature can be held in a narrow range, skin moisture is low and ... n is minimized ([ASHRAE 2005]). These models have been developed in huge, carefully controlled laborat... idity of 60%. The heat balance models have also been confirmed by many field studies, mostly in air-... the predicted comfort temperatures have actually been achieved. Since the beginning of the 1970s, s
- Exterior wall on floor slab @basics:building_physics_-_basics:thermal_bridges:tbcalculation:examples
- slab ====== A typical connection detail is shown below: {{ :picopen:aussenwand_auf_bodenplatte_abb_... d_auf_bodenplatte_abb_5.png?800 |}} **Note!** //Before preparing the calculation model, it should be checked which building component layers are relevant for the calculations and which can be disregarded. Thus for example, blinding layers ca
- Definition and effects of thermal bridges @basics:building_physics_-_basics:thermal_bridges
- nt areas (if there is a difference in temperature between the inside and the outside). The effects of... osses**.\\ \\ Both effects of thermal bridges can be avoided in Passive Houses: the interior surface t... occur any longer – and the additional heat losses become insignificant. If the thermal bridge losses ... spots any more ** - and less effort will have to be made for calculating the heat energy balance.\\ \
- Unheated basement @basics:building_physics_-_basics:thermal_bridges:tbcalculation:examples
- represent an additional heat transfer resistance between the heated interior space and the outdoor air which has to be taken into account. {{ :picopen:unbeheizter_kell... er resistance is assigned to the boundary surface between the basement and the interior space (see fig... y-relevant evaluation of the connection situation between the basement and the interior space, another
- Thermal comfort parameters @basics:building_physics_-_basics:thermal_comfort
- mainly depends on the "thermal comfort". This has been well-researched and the results have been incorporated into international standards (DIN ISO 7730).... e window: Due to the small temperature difference between window surface and room air, the speed of ai... rived from this fact. **It creates a relationship between the activity (e.g. sleeping, running...) and
- Basic principle for calculating thermal bridges @basics:building_physics_-_basics:thermal_bridges:tbcalculation
- thermal conductivities of the materials must also be given besides the geometry. Furthermore, boundary conditions for temperatures and heat transfer resistances should be selected. The norm **DIN EN ISO 10211** is decisi... n of the minimal interior surface temperature can be performed using the same model, but other boundar
- Heat transfer
- re differences) is proportional to the difference between the temperatures. If divided by the temperature difference, the result will be a value which characterises the heat transfer cap... ave to transfer heat to their neighbors) there is beetween the hot and the cold side. Thus the U-value... s in the tendency to transfer heat are quite high between different materials. Air, as long as it is n
- Local thermal comfort @basics:building_physics_-_basics:thermal_comfort
- simultaneously improves thermal comfort. This can be explained as follows: * By improving thermal i... ace, in other words: //the temperature difference between the inside (the surfaces in the room and the... er (external walls, roofs etc. not more than 1 °C below the indoor air temperature, window surfaces a maximum of 3 to 3.5 °C below this [[basics:building_physics_-_basics:therma
- Special features and characteristics of components in contact with the ground @basics:building_physics_-_basics:thermal_bridges:tbcalculation:ground_contact
- lding is determined by the temperature difference between the inside space and the outside. In the cas... e depends on the structure of the ground surface. Because the condition of the surfaces bordering the ... the project planning, the surface temperature can be equated with the outdoor air temperature in practice. The heat transfer resistance between the ground surface and the outdoor air is di
- Recommended procedure for calculating thermal bridges of components in contact with the ground @basics:building_physics_-_basics:thermal_bridges:tbcalculation:ground_contact
- r hand, this requires that thermal bridges should be determined in accordance with DIN EN ISO 10211. T... t of edge insulation or skirt insulation can also be depicted directly by the $\varPsi$-values in this... of the components in contact with the ground must be determined through an additional heat flow simula... on. In doing so, exactly the same dimensions must be used in the models. \\ \\ **For preparing the cal
- Interior walls on floor slabs @basics:building_physics_-_basics:thermal_bridges:tbcalculation:examples
- hout the influence of the ground. The result will be strongly on the safe side because the "insulating effect" of the ground is not taken into account (se... the interior wall is known. The Ψ-value can then be calculated based on the same method as in the [[b... quires a three-dimensional calculation which will be too time-consuming in most cases. As a two-dim
- Software for calculating thermal bridges @basics:building_physics_-_basics:thermal_bridges:tbcalculation
- ean Baptiste Joseph Fourier): <WRAP center 60%> \begin{align} &\Large{\sum_{i=1}^{3} \dfrac{\partial}... ional heat flow issues, the Fourier equation must be calculated numerically using computer-assisted me... ds. Typical heat flow software programs which can be used for building engineering applications are ba... accuracy regardless of the method used. It should be noted that not every software program can perform