Civil Engineering Reference
In-Depth Information
Aluminum spacer
Top facing
Top facing
VIP barrier envelope
VIP barrier envelope
VIP core material
VIP core material
Bottom facing
Bottom facing
Butyl sealant
l
p
= 500
l
p
= 500
t
′
film
0.6 5.3 0.6 2.1
l
p
= 500
l
p
= 500
t
′
film
0.6-t
facing
t
facing
w = 8.6 + t
′
film
w = 6.0 + t
′
film
(a)
(b)
Reinforced non-metallic tape
Top facing
Top facing
VIP barrier envelope
VIP barrier envelope
VIP core material
VIP core material
Air gap
Bottom facing
Bottom facing
t
′
film
l
p
= 500
l
p
= 500
t
498
1. 0
′
film
0.6
3.0
2.0
0.15
w = 9.0 + t
′
film
w = 1.15 + t
′
film
l
p
= 500
(c)
(d)
9.4
Four edge spacer construction types for vacuum insulated
sandwich elements: (a) aluminum spacer of double glazing,
(b) folded edge construction, (c) thermoplastic spacer and
(d) reinforced non-metallic tape (Tenpierik
et al.
, 2008).
a possible high solar and visible transmittance of silica aerogels must be
weighed against their fragile, brittle nature.
Aerogel insulation and vacuum insulation panels are today's best high
performance thermal insulators. However, whereas traditional thermal
insulators are 'cheap' and available in bulk, their specifi c properties and
drawbacks compared to traditional thermal insulators require a shift in the
way thermal insulators are applied in constructions.
A proper best practice of vacuum insulation panels in new constructions
requires a shift of application toward prefabricated constructions, i.e., where
the complete building process can be carried out under controlled circum-
stances, and to sandwich elements for curtain walls. Proper detailing of
these constructions protects the panels from puncture during the period of
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