Köldbryggor

Beräkna köldbryggor

In Akander (1997) explains the general idea of and problematic with discretisizing wall elements to perform Finite Element Analyses (FEA). He also discusses the problematic of analysing two-dimensional details compared to the simpler calculation of one-dimensional heat flow through, in this case, walls.

Staelens’ (1988) thesis includes step-by-step instructions on calculating twodimensional construction details by hand. Though this hand-calculation method is not used in this report, Staelens provides helpful discussions on defining thermal bridges and the thermal bridge’s influence on an element’s overall thermal performance.

Konieczny (2005) exemplifies how the thermal performance of several building components can be summed up into one coefficient, something that is also used in this thesis and the ISO-standards studied.

In his thesis, Blomberg (1996) discusses discretization and numerical calculations for constructions and the ground below. Examples in his thesis regarding three dimensional analysis of building corners have been studied to give an idea of how discretization can work for similar analyses in this thesis.

Rantala’s (2005) thesis discusses and performs numerical calculations regarding assumed temperature lines in the subsoil, something that is mentioned but not used in this report.

Wetterlund (2010) describes in short the main steps needed to calculate the thermal performance of floor slabs and their corners; the same principles are used in this report.

 

Akander J. (1997), Efficient detailling of energy flow in building components, Royal Institute of Technology, Department of Civil and Architectural Engineering, Stockholm, Sweden.

Blomberg T. (1996), Heat Conduction in Two and Three Dimensions [pdf] Available at <http://www.buildingphysics.com/manuals/avh_TB.pdf> [Accessed at 20 August 2011]

Rantala S. (2005), On Thermal Interaction between Slab-on-Ground Structures and Subsoil in Finland [pdf] Available at http://dspace.cc.tut.fi/dpub/bitstream/handle/123456789/117/rantala.pdf [Accessed at 20 August 2011]

Staelens P. (1988), Thermal bridges – A non-computerized calculation procedure, Division of Building Technology, Gothenburg, Sweden, 145 pp.

Konieczny G. (2005), Energy Declaration of Buildings and Building Details [pdf] Available at <http://www.ibpsa.org/proceedings/BS2005/BS05_0549_554.pdf> [Accessed at 20 August 2011]

Wetterlund H., Carlsson H., Hagentoft C-E., Wallin M. (2010), Mark-kant värmeförlust, Bygg & teknik (2/10) pp.44-46.