Simulations of Heat and Moisture Conditions in a Retrofit Wall Construction with Vacuum Insulation Panels
2013 (English)In: Journal of Civil Engineering and Architecture, ISSN 1934-7359, Vol. 7, no 7, 781-788 p.Article in journal (Refereed) Published
Vacuum insulation panels provide unprecedented possibilities for renovating the existing building stock in a manner that reduces the thermal losses through the building envelope. This study is focused on the implementation of VIPs (vacuum insulation panels) in energy retrofit projects with rendered outer walls. Particular emphasis is put on reducing the thermal bridges due to mechanical fasteners and at the joints of the panels. These are evaluated through a parametric study of the impact of the thermal conductivity of the joints of the panels and the adjacent insulation layer as well as the material of the fasteners. The study is carried out with 3D FEM (finite element method) simulations software. Furthermore, the moisture conditions in the construction are studied. The dynamic moisture behavior of a wall construction is modeled with a two dimensional FEM model. The long term effects of vapor diffusion are investigated in terms of accumulated moisture and the risk of condensation. The results illustrate that vacuum insulation on the outside of the wall construction does not pose a moisture problem to the construction. The simulations are based on a draft of a new technical solution for the refurbishment of a building that is typical for the great Swedish building program of the 1970s.
Place, publisher, year, edition, pages
David Publishing Company , 2013. Vol. 7, no 7, 781-788 p.
Vacuum insulation panels, retrofit project, thermal bridges, parametric study, moisture conditions, FEM model
Architectural Engineering Building Technologies
IdentifiersURN: urn:nbn:se:kth:diva-125819OAI: oai:DiVA.org:kth-125819DiVA: diva2:640788
ProjectsRobust and durable vacuum insulation technology for buildings
QC 201401272013-08-142013-08-142015-11-09Bibliographically approved