advanced building skins 14 | 15 June 2012 - lamp.tugraz.at - Graz ...

Advanced Building Skins
The next series of calculations investigates the influence of the distance between pipe and surface
layer if a pipe of plastic (λ = 0.23 W/(mK)) is used. The results are displayed in figure 7. In this case,
the width of the transitional layer bk (λ = 40 W/(mK) also influences the efficiency. Thus, for example,
a preformed surface layer can improve the efficiency of the system.
Figure 7: Influence of the distance between pipe (plastic) and surface layer
The third series of calculations, shown in figure 8, represent the influence of parallel fixed pipes. The
pipes are made of steel and fixed directly to the surface sheet. A distance between the pipes of more
than 100 mm leads to no further increase of efficiency.
Figure 8: Influence of the distance between parallel fixed pipes
The presented results are just a choice of the performed investigations. Of course, there are a lot of
more interactions between used materials and geometry. The entirety of numerical simulations are the
basis for following test set ups with fully installed sandwich panels with integrated pipe systems. The
construction of these thermal activated sandwich panels will connect the theoretical and numerical
analyses with new procedures for producing and installing these products. The first installed panel is
planned for summer 2012.
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