Insulating glass，especially double glass units dominates the
windows&doors market. But with the development of vacuum insulating glass
in recent years. Vacuum insulating glass has shown superior performance far
beyond double glazing. What are the advantages of vacuum glazing
compared with double glazing?
1.VIG
has much better thermal performance
Double glazing,or insulating glass,contains 3 types heat
transfer types: Radiation,convection and conduction.
Because of the existing of the air convection inside the
insulating glass,which make it difficult to bring IGU U value down even though
more and more technology were developed..Warm edge spacer,argon filled
IGU,triple and even quad silver low-E coating.etc
To suit customers higher thermal insulation performance
requirement, triple glazing and even quad glazing were used to achieve the best
possible U value,till now the best U value achieved for triple glazing is
0.6W/M2.K.The cost is thick and heavy glass,as well as that of hardware,windows
frame etc.
Vacuum insulating glass,because of the high degree vacuum space
between glass,which eliminate the heat convection inside the glass,the heat can
been transferred through the micro glass pillars,and taking advantage of dual
silver low-E coating,even if the 8.3mm VIG can achieve 0.47W/M2.K U value.
Below table shows the thermal performance compare between VIG
and IGU.
|
Glass |
Thickness |
LT % |
U value |
SHGC |
|
5+0.3v+5
|
10.3MM |
69% |
0.47 |
0.57 |
|
5LE
|
47MM |
55% |
0.60 |
2.VIG is
lighter and thinner.
Vacuum insulating glass is 8.3 mm thick and weighs
20 kg/m²,U value is 0.47W/M2.K.
While IGU can only achieve lowest 0.6W/M2.K ,and glass
combination is 4-16AR-4-16AR-4,weight 30kgs/m2.k and total thickness 42mm.
Compared with insulating glass, vacuum insulating glass can
significantly reduce the cost of building load-bearing and frame materials,as
well as the hardware load-bearing.
In addition, vacuum insulating glass is ideal for renovation of
old buildings. No need to replace the window frame, just replace the glass
or add inner layer to complete the renovation easily.
3.VIG can be
horizontal installed in glass roof or Skylight
The insulating glass are
usually filled with gas,whether it’s air or argon. When installed horizontally,
its U-value rises due to the increase in gas convection. In contrast, vacuum
insulated glass contains no air between the glass sheets. The U-value remains
the same regardless of the mounting position.
4.VIG can be applied in different altitude areas
nsulating glass manufactured at low altitudes expands when
transported to high altitudes. However, vacuum insulating glass does not leave
air between the glass, and there will be no expansion problem when installed at
a high place. In fact, vacuum insulating glass experiences less pressure
difference at higher altitudes and therefore less stress. This results in
higher security.
Another benefits is,VIG panel is flat and avoid visual
distortion when been applied in facade.Because VIG require high flatness ,and
vacuum space also ensures no expansion or contraction and avoid
5.VIG
has superior anti-condensation performance
Condensation refers to the phenomenon in which condensed water
droplets form on the surface of an object when the temperature of the object
lower than the dew point.
Since the edges of the vacuum insulating glass are all sealed,
the vacuum chamber eliminates the possibility of condensation and keeps the
interior glass surface temperature above the dew point. For
example,when indoor temperature is 18°C and relative humidity
is 60%, the dew points of the inner surface of insulating glass and vacuum
insulating glass are -8°C and -36°C, respectively. It makes vacuum insulating
glass more suitable for applications in extreme cold weather areas.
The insulating glass may retain water vapor in the cavity that
cannot be removed, causing negative effects in actual use. In contrast, vacuum
insulating glass does not suffer from such problems due to its vacuum chamber.
6.VIG
has superior soundproof performance against low&middle frequency noise
Generally speaking, urban noise includes living noise, traffic
noise, occupational noise and construction noise, mainly in the range of low
frequency (200Hz~300Hz) and medium frequency (500Hz~1000Hz). The weighted noise
reduction index of vacuum insulating glass is 36dB. The sound is mainly
transmitted through the spacer.
The IGU weighted noise reduction is 29dB, and the sound is
transmitted through the air. This shows that vacuum insulated glass is very
suitable for buildings in the city center or near the street.
7.VIG
lifetime is much longer than insulating glass
Insulating glass usually
adopts a double sealing structure of metal partitions. The inner sealant is
made of butyl rubber and the outer layer is covered with silicone or
polysulfide sealant. These materials age easily. In contrast, most vacuum
insulating glass is sealed with solder glass and can last longer. Generally
speaking, the average service life of insulating glass is about 15 years, while
vacuum insulating glass can be used for more than 25 years.
Contact us:
Location: 501,Sweetome,NO.2
Dongyue Ave,Taian city,Shandong Province,China
Mail: [email protected]
Website: https://www.vacuum-glass.com/vacuum-glass-solutions/
Mobile: + 86 17705464660