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... localised area of the building envelope where the heat flow is different (usually increased) in comparis... growth. * **Altered**, usually increased, **heat losses**.\\ \\ Both effects of thermal bridges ca... ture cannot occur any longer – and the additional heat losses become insignificant. If the thermal brid
- Heat transfer
- ====== Heat transfer ====== Heat transfer is the transfer of thermal energy across a thermodynamic system boundary... energy 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: he
- Heating load in Passive Houses
- load is the decisive factor: a certain amount of heat can be distributed with very little effort via th... heating) and reduces the investment required for heat distribution to a minimum. These cost savings can... ventilation system itself. However, the amount of heat that can be distributed via the fresh air system ... ngs to go by either criterion - the 15 kWh/(m²yr) heat demand OR the 10W/m² heating load. \\ \\ <WRAP c
- Special features and characteristics of components in contact with the ground @basics:building_physics_-_basics:thermal_bridges:tbcalculation:ground_contact
- ture and thermal conductivity of the ground ==== Heat flow through the individual components of a build... he case of components in contact with the ground, heat flow depends on the temperature field prevailing ... with the outdoor air temperature in practice. The heat transfer resistance between the ground surface an... air is disregarded in the process ($R_{se}$ = 0). Heat follows the path of least resistance. 100 m of ea
- Unheated basement @basics:building_physics_-_basics:thermal_bridges:tbcalculation:examples
- d floor area, but it does represent an additional heat transfer resistance between the heated interior s... N ISO 13370, Section 9.4** </WRAP> $U_f$ is the heat transfer resistance of the basement ceiling. $U_{... floor slab and the heated basement. The required heat flow from the heated space consists of the conduc... the use of $L_{ue}$ it is possible to express the heat flow or the conductance using the following equat
- Basic principle for calculating thermal bridges @basics:building_physics_-_basics:thermal_bridges:tbcalculation
- orresponding building component connections for a heat flow program. The individual thermal conductiviti... hermore, boundary conditions for temperatures and heat transfer resistances should be selected. The norm... ponent that is assumed for the balance. First the heat flow or the conductance $L_{2d}$ is determined by means of the heat flow simulation. To determine the $\Psi$-value, $
- Software for calculating thermal bridges @basics:building_physics_-_basics:thermal_bridges:tbcalculation
- kness 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 equa... ensional with constant boundary conditions and no heat sources/sinks, an already known analytical soluti... d in energy balancing for taking into account the heat losses from regular building components. For calc
- Recommended procedure for calculating thermal bridges of components in contact with the ground @basics:building_physics_-_basics:thermal_bridges:tbcalculation:ground_contact
- IN EN ISO 10211** is recommended. Calculating the heat losses through the ground in the Ground worksheet... e ground must be determined through an additional heat flow simulation. In doing so, exactly the same di... ith a boundary condition corresponding with their heat transfer resistance R = 1/U, rather than with the... ound worksheet of the PHPP. The PHPP does not use heat flow simulations for this and instead uses specia
- What defines thermal bridge free design?
- se.png?300|Due to thermal bridge free design, the heat losses through the thermal bridges can be reduced... gy balance}}] \\ The overall temperature-specific heat loss is characterised by the transmission conduct... *regular losses of all areas A with their regular heat transfer coefficient U** and the thermal bridge c... ady be taken into account when giving the regular heat transfer coefficient U<sub>reg</sub> (for example
- Thermal comfort parameters @basics:building_physics_-_basics:thermal_comfort
- 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... ding component, e.g. wall, roof, floor, etc.) the heat flow from the inside to the outside is reduced. * Therefore the heat flow of the room area to the interior surface of
- Adaptive versus Heat Balance Comfort Models @basics:building_physics_-_basics:thermal_comfort
- ====== Adaptive versus Heat Balance Comfort Models ====== \\ Author: Jürgen Schnieders, Passive House ... judgement of thermal comfort: The first are the **heat balance models**, which basically assume that the... 27 °C, each at a relative humidity of 60%. The heat balance models have also been confirmed by many f... ngs), a fact that is already accounted for by the heat balance models. Often, vague references to physio
- Local thermal comfort @basics:building_physics_-_basics:thermal_comfort
- al 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... external building component is also reduced. The heat flow overcomes the so-called thermal resistance o... face (radiation and convection). * The smaller heat flow results in a smaller temperature loss at thi
- 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... f the conductance $L_{2d}$, this results from the heat flow calculated using the heat flow software program. <WRAP centeralign> **Calculating the conductance... uld be used for simplification. One can enter the heat flows and the necessary lengths here and the desi
- Thermal bridge calculation @basics:building_physics_-_basics:thermal_bridges
- ant instrument for identifying in more detail the heat losses from the building envelope. In highly effi... ions 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
- used here also for determining the Ψ-values. The heat flows and necessary lengths can be entered here a... ion between the basement wall and the floor slab. Heat flow through the floor slab thus influences the heat transfer through the basement wall and vice versa.