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Daylight and thermal comfort in a residential passive house - A simulations study based on environmental classification systems
| Content Provider | Semantic Scholar |
|---|---|
| Author | Heier, Magnus Österbring, Magnus |
| Copyright Year | 2012 |
| Abstract | Construction of passive houses has increased in recent years. The aim of passive houses has traditionally been energy efficiency, which means that the indoor climate faces a risk of being overlooked as these two objectives sometimes contradict each other. One conflict that usually arises is the one between daylight, heating demand and thermal comfort during summer. As the use of environmental classification systems increases, indoor climate conditions are emphasized. This requires careful planning and a wider perspective in order to achieve both energy efficiency and a satisfying indoor climate. This paper investigates how indoor climate and energy usage is affected by the choice of windows and shading devices in a residential passive house. This is particularly interesting since cooling systems rarely are available in Scandinavia to manage overheating during summers, and daylight quality is seldom investigated in residential houses. Possible solutions to these contradicting demands were obtained by simulations of NCC's passive house “Kuben”. Among the tested solutions are different types of glass, paints, inclination of window niches, window sizes, and internal and external shading devices. The results of these simulations were compared with the Swedish passive house criteria and Miljobyggnad, a growing Swedish environmental classification system based on 15 so-called indicators. Six of these are affected by the window and shading, and are included in this paper. Different solutions were developed where Kuben remains being a passive house while achieving the highest grade in Miljobyggnad for the studied indicators. This paper shows that by choosing window glass with a higher light transmission, more daylight and reduced energy usage can be achieved. Increasing the window area will have the same affect. Both these actions increase the need of shading, where external awnings provided the most effective solution. Optionally, the building can meet the requirements by increasing the roof overhang and by adding internal solar shading. The results emphasize that all window properties should be considered at an early stage to ensure a good final result. It is important to consider the effect of the window properties’ on the need for solar shading. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.laganbygg.se/userfiles/presentations/51._session_14_m.heier.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
