Jelle Langmans (KU Leuven, Belgique)
Jeudi 18 février 2014
The primary objective of this presentation is to give an overview recent and ongoing research at the Building Physics section at the KU Leuven (Belgium) regarding the hygrothermal performance of light weight construction. First, the presentation will zoom in on numerical simulation strategies to predict the combined heat, air and moisture transport in wood-frame construction. Herein the focus lies on the impact of natural and forced convection on the overall heat and moisture transport. Analytical, numerical and experimental validation cases verifying the simulation model will be shown. Second, an overview of both laboratory and in-situ measurements on full-scale timber frame wall elements will be given. The laboratory measurements cover the hygrothermal analysis of highly insulated timber frame walls with an exterior air barrier. The in-situ measurements, on the other hand, focus on the influence of forced air convection in typical wood frame walls. In addition, an ongoing extensive research program in which 8 full-scale test walls are constructed to study the ventilation rates behind various types of cladding materials will be briefly touched at the end this presentation.
Keywords: timber frame construction, durability, HAM-simulation, experimental, validation, DELPHIN, hot-box/cold box, cavity ventilation