planning:calculating_energy_efficiency:dynamic_simulation
Differences
This shows you the differences between two versions of the page.
Both sides previous revisionPrevious revisionNext revision | Previous revisionLast revisionBoth sides next revision | ||
planning:calculating_energy_efficiency:dynamic_simulation [2020/08/05 12:21] – [Simulation as an alternative to measuring?] wfeist | planning:calculating_energy_efficiency:dynamic_simulation [2020/08/07 23:18] – [Dynamic Simulation using DYNBIL] wfeist | ||
---|---|---|---|
Line 1: | Line 1: | ||
====== Dynamic simulation of a building' | ====== Dynamic simulation of a building' | ||
- | \\ | + | ==== Dynamic Simulation using DYNBIL ==== |
|{{: | |{{: | ||
|Fig. 1 A typical room model used in instationary simulation of a buildings \\ thermal performance; | |Fig. 1 A typical room model used in instationary simulation of a buildings \\ thermal performance; | ||
\\ | \\ | ||
- | ==== Models used for Simulation ==== | + | Dynbil is a multizone dynamic thermal building simulation program developed at the Passive House Institute. Dynbil also takes into account moisture storage and moisture transport processes. The room model works with one air node and one radiation node, which are clearly separated from each other. Heat transmitted to interior surfaces is calculated depending on the location in the room and the actual temperature difference; for exterior surfaces, the complete solar and infrared radiation balance and the influence of wind speed are taken into account. Heat transfer (radiative and convective/ |
+ | |||
+ | A single room (" | ||
+ | |||
+ | In the meantime, additional features have been added such as simulations of moisture transport and ventilation models. | ||
+ | Although DYNBIL models the building components very accurately (see e.g. comparison of simulated and measured temperatures within the wall), the focus is the whole building perspective (fig. 2). The entire building | ||
+ | Another aspect of the whole building approach is the integration of all system components including the consideration of thermal comfort, ventilation, | ||
+ | |||
+ | |{{: | ||
+ | |Fig. 2 Several zones will be connected to a building model with air flows between the zones as well as components connecting the different zones.| | ||
+ | |||
+ | Dynbil has been validated with the detailed measurements in the first Passive House (located in Darmstadt Kranichstein; | ||
+ | |||
+ | ==== General Considerations on Models used for Simulation ==== | ||
The actual task in dealing with the questions of indoor climate and energy balance results from the high level of complexity which the "house and heating" | The actual task in dealing with the questions of indoor climate and energy balance results from the high level of complexity which the "house and heating" | ||
Line 45: | Line 59: | ||
Quite often, therefore, even with computer supported simulation models, the " | Quite often, therefore, even with computer supported simulation models, the " | ||
- | * Unordered List ItemAs | + | * As a rule, the digital algorithm itself lacks direct clarity (it is mastered by discretion). Therefore, even experienced users often find it difficult to read simple facts that can be generalized from EDP models. |
Example: | Example: | ||
Line 109: | Line 123: | ||
From the considerations so far it follows quite clearly: | From the considerations so far it follows quite clearly: | ||
- | The method of choice for answering typical questions of structural influences on the indoor climate and heating energy consumption is the use of thermal computer aided building models. - On the other hand, validation of such models thus becomes one of the most urgent tasks of research. | + | |**The method of choice for answering typical questions of structural influences on the indoor climate and heating energy consumption is the use of thermal computer aided building models. - On the other hand, validation of such models thus becomes one of the most urgent tasks of research.**| |
| | ||
- | In practice, this finding has long since become established: | + | In practice, this finding has long since become established: |
- | ===== References ===== | + | ==== References ==== |
+ | **[Blomsterberg 1990]** Blomsterberg, | ||
**[Feist 1994]** Thermische Gebäudesimulation; | **[Feist 1994]** Thermische Gebäudesimulation; | ||
- | Thermal building simulation, first edition, | + | Thermal building simulation, first edition, |
+ | |||
+ | **[Fredlund 1989]** Fredlund, B.: Blocks of flats with glazed verandas, Taberg; Swedish Coun¬cil for Building Research, Stockholm D3:1989 \\ | ||
+ | |||
+ | **[Johnston 2020]** Johnston, D. et al: Are the energy savings of the passive house standard reliable? A review of the as-built thermal and space heating performance of passive house dwellings from 1990 to 2018. March 2020, Energy Efficiency, DOI: 10.1007/ | ||
+ | |||
+ | **[Lange 1990]** Lange, E.: Radhus i Valdemarsro, | ||
planning/calculating_energy_efficiency/dynamic_simulation.txt · Last modified: 2020/08/07 23:26 by wfeist