A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Thermal performance of wall assemblies with low emissivity
In wall systems, airspaces can increase thermal resistance if a reflective material such as foil with low emissivity is installed in a furred-airspace assembly. In this article, the present model, hygIRC-C, was used to investigate the steady-state thermal resistance of wall assemblies that incorporate foil adhered to expanded polystyrene foam in a furred assembly. To investigate the effect of the furring orientation, the furring was installed horizontally and vertically and compared to walls with no furring. For wall with vertical furring, the three-dimensional version of the present model was used to capture the three-dimensional effect of the thermal bridges. Because the foil emissivity can be affected by dust accumulation and/or water vapor condensation on the foil surface, consideration was given to investigate the effect of both varying foil emissivity and outdoor temperature on the thermal performance of the various wall specimens. The results showed that the thermal resistance (R-value) of the reference wall (no furring) is greater than the wall specimens with furring. Also, the results showed that the contribution of the furred-airspace assembly to the R-value of wall specimen with vertical furring is higher than that for wall specimen with horizontal furring.
Thermal performance of wall assemblies with low emissivity
In wall systems, airspaces can increase thermal resistance if a reflective material such as foil with low emissivity is installed in a furred-airspace assembly. In this article, the present model, hygIRC-C, was used to investigate the steady-state thermal resistance of wall assemblies that incorporate foil adhered to expanded polystyrene foam in a furred assembly. To investigate the effect of the furring orientation, the furring was installed horizontally and vertically and compared to walls with no furring. For wall with vertical furring, the three-dimensional version of the present model was used to capture the three-dimensional effect of the thermal bridges. Because the foil emissivity can be affected by dust accumulation and/or water vapor condensation on the foil surface, consideration was given to investigate the effect of both varying foil emissivity and outdoor temperature on the thermal performance of the various wall specimens. The results showed that the thermal resistance (R-value) of the reference wall (no furring) is greater than the wall specimens with furring. Also, the results showed that the contribution of the furred-airspace assembly to the R-value of wall specimen with vertical furring is higher than that for wall specimen with horizontal furring.
Thermal performance of wall assemblies with low emissivity
Saber, Hamed H (author)
Journal of Building Physics ; 36 ; 308-329
2013-01-01
22 pages
Article (Journal)
Electronic Resource
Unknown
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