Fulltext results:
- Heating load in Passive Houses
- x). \\ The specific values for heating loads are not identical with the ones for energy (measured in k... P> \\ A building whose maximum heating load does not exceed the available capacity of the supply air d... costs for building services in a Passive House do not necessarily have to be higher than the costs in a... planned. * The calculated heating loads should not, however, contain excessive safety margins as thi
- Unheated basement @basics:building_physics_-_basics:thermal_bridges:tbcalculation:examples
- principles ===== Active temperature control does not take place in unheated basements. As a rule, lowe... sary. In energy balances the unheated basement is not taken into account in the treated floor area, but... ion between the basement and the interior space, another Ψ-value must be calculated for the energy bala... f the basement is unknown, therefore $L_{2d}$ cannot be calculated directly, but with the use of $L_{u
- Definition and effects of thermal bridges @basics:building_physics_-_basics:thermal_bridges
- gh everywhere that critical levels of moisture cannot occur any longer – and the additional heat losses... s of thermal bridges on the energy balance depend not only on the influence in terms of physics but als... uildings, the use of thermal bridge additions is not advised because they lead to overestimation of the heat losses.** However, in general it is not possible to state how high the heat losses due to
- Adaptive versus Heat Balance Comfort Models @basics:building_physics_-_basics:thermal_comfort
- ers, Passive House Institute.\\ ===== Why PHI is not using adaptive comfort models ===== \\ A common d... p to 35 °C are predicted. The adaptive models do not rely on a physiological model of the human body, ... ort temperature of people inside a building could not be found in any study. People do, of course, adju... fe to say that physiological acclimatisation does not influence the comfort conditions, although it wil
- Exterior wall on floor slab @basics:building_physics_-_basics:thermal_bridges:tbcalculation:examples
- :aussenwand_auf_bodenplatte_abb_5.png?800 |}} **Note!** //Before preparing the calculation model, it ... mple, blinding layers can be disregarded which do not have any significant insulating effect on account... e $L_{2d}$. If the actual size of the building is not known, B‘ can be selected for the option B, but it should not be too small ($B' > 5 \, \text{m}$). $B' = 7{,}99
- Local thermal comfort @basics:building_physics_-_basics:thermal_comfort
- y warm even in winter (external walls, roofs etc. not more than 1 °C below the indoor air temperature, ... r speeds in the room (apart from leaks – which do not occur in the airtight Passive House anyway) are d... value. If the insulating effect of the window is not so good, the air\\ speeds rise to critical levels... t temperature difference in various directions cannot exceed 3.5 °C if the external surface temperature
- Recommended procedure for calculating thermal bridges of components in contact with the ground @basics:building_physics_-_basics:thermal_bridges:tbcalculation:ground_contact
- n the Ground worksheet of the PHPP. The PHPP does not use heat flow simulations for this and instead us... orm recommends a floor slab length of 4 metres. **Note!** The reference dimensions have become mixed up... ith Option A, the norm DIN EN ISO 10211 contains another possibility for calculating corresponding Ψ-va... ts in contact with the ground described above are not necessary. When calculating the Ψ-value, they mus
- Special features and characteristics of components in contact with the ground @basics:building_physics_-_basics:thermal_bridges:tbcalculation:ground_contact
- n the case of components with ground contact does not differ from that for other thermal bridges. Howev... temperatures around freezing point initially does not remain as snow on the ground. Nonetheless, exact ... R = λ/d because the ground around a building does not represent a homogeneous building component layer.... wo-dimensional transient numerical calculation is not so high that this extra effort can also be justif
- Heated basement @basics:building_physics_-_basics:thermal_bridges:tbcalculation:examples
- {{ :picopen:beheizter_keller_abb_6.png?500 |}} Note: this is not a thermal bridge free connection. In the example given here it is relatively clear that ... nt wall connection to the basement floor slab has not been implemented in an ideal manner. One would a... as thermal bridge free? Strictly speaking, one cannot consider both these connections separately from e
- What defines thermal bridge free design?
- s:thermal_bridge_definition|thermal bridges]] are not greater than the result calculated using the exte... rmal bridges can be reduced so much that they do not have to be taken into account in the energy bala... tributions are generally insignificant, they will not be discussed in detail here. ($\varPsi$ **is the ... ed besides that shown here. If a new building is not built in accordance with the principle of thermal
- Thermal comfort parameters @basics:building_physics_-_basics:thermal_comfort
- (U=0.8 W/(m²K)) the maximum air speed is a barely noticeable 0.11 m/s. If the insulating value of the w... ltriness limit in relation to the air humidity is not exceeded, * air speeds are within closely de... . * If the external surface temperature is not more than 3.5 °C below the ambient temperature, t... temperature difference in different directions cannot be greater than 3.5 °C. The thermography photogra
- Basic principle for calculating thermal bridges @basics:building_physics_-_basics:thermal_bridges:tbcalculation
- boundary conditions for the temperatures, it does not matter which temperatures are set for the inside ... tures and thermal capacities of the materials are not taken into account in the steady-state simulation... minimum surface temperatures ascertained thus do not have any informative value. The above-mentioned b... he temperature are rough estimates at best and cannot really depict realistic temperature differences.
- Software for calculating thermal bridges @basics:building_physics_-_basics:thermal_bridges:tbcalculation
- ources and heat sinks} \end{align} </WRAP> It is not possible to solve this partial differential equat... uracy regardless of the method used. It should be noted that not every software program can perform calculations in a non-steady state, i.e. time-independen
- Heat transfer
- etween different materials. Air, as long as it is not moving, has a very low thermal conductivity (~0.0... 0 times that of the air. Insulation materials are nothing more than very lightweight structures, which
- Interior walls on floor slabs @basics:building_physics_-_basics:thermal_bridges:tbcalculation:examples
- because the "insulating effect" of the ground is not taken into account (see Figure 1). As a matter of... conductances with and without the interior wall. Another advantage is that the surface temperatures det