Multidimensional hygrothermal analysis of complex building con- structions

Author(s): Balázs Nagy
Paper category: Proceedings
Book title: International Conference on Sustainable Materials, Systems and Structures (SMSS 2019) Energy Efficient Building Design and Legislation
Editor(s): Marina Bagarić, Ivana Banjad Pečur, Hartwig M. Künzel
ISBN: 978-2-35158-217-6
e-ISBN: 978-2-35158-218-3
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 83-90
Total Pages: 08
Language: English

Abstract: In accordance with nowadays building energy performance requirements, building constructions developed significantly in the past few years due to new construction materials and building elements, because of the need for increased thermal insulation layers and the development of new building technology solutions. However thermal performance requirements are tightening, there are no moisture performance requirements connected to them, therefore in most cases, building construction design, if at all, only include simplified vapour transfer calculations. This paper presents a comparative analysis of multidimensional conjugated heat- and moisture transport numerical FEM simulations of modern building construction joints. For comparison reference, thermal simulations were made, neglecting the hygrothermal aspects. In the paper, besides the detailed wall section, a wall corner joint is presented, both built in 2D from complex building elements, such as insulation filled masonry blocks and were tested using different fillers (aerogel, expanded perlite, expanded polystyrene, mineral wool and PUR foam), respectively. The hygrothermal material properties of the insulation filled masonry blocks were measured in laboratory. The evaluation of the numerical simulation results shows that there are significant differences between thermal and hygrothermal approach and well insulated construction joints behave differently against heat and moisture using different thermal insulation fillers in the masonry blocks.

Online publication: 2019
Publication type : full_text
Public price (Euros): 0.00

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