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