Civil Engineering Reference
In-Depth Information
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Fig. 8 Test construction for the investigation of thermal bridge effects while using VIP with
different envelope laminates. In a first group, the VIP laminates include a 7-lm aluminium layer
(A), and in a second group, VIP-applied laminates for the envelope contain only a 30-nm
aluminium layer. Left 6 VIP were mounted on a temperature-controlled concrete wall and
covered with 20-mm polystyrene foam insulation. Right The thermal image shows enhanced
temperatures for VIP with the pure aluminium enclosure
200 µm stainless steel envelope
1
laminate with an 8 µm aluminum layer
0.9
0.8
laminate with an 80 nm aluminum layer
0.7
infinite extended VIP
0.6
laminate with 80 nm aluminum and an air gap of 5
mm between adjacent VIP
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0.1
0
0
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Length of a square-shaped paneel / m
Fig. 9 Calculated average U-value of vacuum insulation panels (VIP) as a function of panel size
for different laminate types. The values for the infinite extended VIP (full line) represent the U-
value for the core material not taken into account thermal boundary effects
