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Hygro-thermal response of a ventilated attic to the future climate load in Sweden

Angela Sasic Kalagasidis (Institutionen för bygg- och miljöteknik, Byggnadsteknologi) ; Vahid M. Nik (Institutionen för bygg- och miljöteknik, Byggnadsteknologi) ; Anker Nielsen (Institutionen för bygg- och miljöteknik, Byggnadsteknologi)
Proceedings of the fourth International Building Physics Conference p. 519-526. (2009)
[Konferensbidrag, refereegranskat]

Universal in most climate change scenarios for the 21st century is the increase of the global mean temperature. By the end of the century the increase may be 1-6 oC depending on the chosen emission scenario. Climate scenarios for Sweden point to a warmer and more humid climate in future. It can be expected that the building parts, which are already susceptible for moisture load, will degrade more in future. In Sweden, a ventilated cold attic is a typical representative of a moisture-sensitive construction part. This paper investigates numerically the hygro-thermal response of a typical ventilated attic to a possible future climate load in Sweden. The hygro-thermal conditions in the attic are assessed by a mould growth index (MGI). The results showed the increment of MGI in future for all test cases. The analysis showed that the orientation of a roof and the moisture load to the attic from a dwelling underneath are the influencing parameters on MGI. Since the latter is governed mainly by the ventilation system in a house, the type of the ventilation system is important design parameter for the prevention of future moisture problems in ventilated attics.

Nyckelord: building physics, attic, ham simulation, mould growth, climate change



Denna post skapades 2009-12-18. Senast ändrad 2014-11-12.
CPL Pubid: 104268