SGG
Developing the good solution for thermal insulation TRIPLE GLAZING UNITS
PLANITHERM速 ONE
Thermal insulation of glass: Thermal ex Ug = 5.8 W/m²K change linked to th ickness
Ug = 2.7 W/m²K
0°C outside 20°C inside Window of 2m² Heat loss=232W
Outside Convection (wind) Single Glazing Unit: Outer side of glass is cooled by convection (wind) Thermal exchange between outside and inside is only due to thermal conductivity of glass and can only be managed by glass thickness Thermal insulation is poor.
Outside Convection (wind)
Thermal exchang e li spacer g as (thickn nked to ess) and Radiation
Double Glazing Unit: In a DGU outside glass ply is still cooled by the wind, BUT as there are no convection inside the air space, inner glass ply is NOT cooled by convection. The heat transfer is linked to spacer conductivity: type of gas, its thickness, AND radiation between the two glasses. Thermal exchange is reduced by 2
Thermal insulation of Low E glazing: Ug = 1.1 W/m²K
Outside Convection
Low emis siv Radiation ity low
Thermal resitance improved: Ug = 1.1 W/m²K SGG ¨Planitherm ULTRA N
Low E DGU: Low Emissive coatings have a very low Absorbance in far IR (High Reflectance AND no Transmittance ); so that they emit a low amount of radiation in thermal range (far IR) Radiation exchange between the two glasses is strongly decreased. Thermal flow which goes through inner ply is reemitted inside: Inner glass ply is warmer Outer glass is colder
Thermal flow which goes out is reduced by 5 compared to Monoglazing
Low E glass: An invisible thermal shield Clear float glass
Low E glass Thermal radiation
Solar Radiation Vis.
100
80
20
20
0
0 0.8
Vis.
100
80
0.3
1.5
2.0
2.5
5
10
20
30
Thermal radiation
Solar Radiation
40
50
0.3
Wavelength in Âľm
0.8
1.5
2.0
2.5
Wavelength in Âľm
Transmittance Reflectance
5
10
20
30
40
50
Improvement of thermal insulation:
Coefficient d’isolation thermique UG en W / m² K
Convection Conduction Radiation
Bad Bad Bad
Good Medium Bad
Good Medium Good
Good Good Good
6
4
5.8 2.7
2
1.1
0.5
0 SINGLE GLAZING 4mm
DOUBLE GLAZING Without coating
Low E DOUBLE GLAZING
Low E TRIPLE GLAZING
0.36 GOOD INSULATED WALL according to RT2005
Low E: what are the limits of DGU? UG value versus emissivity DGU (4mm / 16mm - 90%Ar coating / 4mm) U value (4/ 16 - 90% Ar / 4)
1.7
We get closer and closer to the limits of thermal performances of Double Glazing Units
1.6 1.5 1.4
Ug of 1.0 W/m²K is still possible with an emissivity ξN = 0.01
1.3 1.2 1.1 1.0 0.9 0
2
4
6
8
10
12
14
Normal emissivity %
16
18
20
Why do we need Triple Glazing Units? Increasing gas space improves Ug value 2
DGU: 4mm / xx mm 90% Argon / PLT ULTRA N 4mm
1.9 1.8
UG in W/m²K
1.7 1.6
O
1.5
d si t u
e
de i s In
1.4 1.3 1.2 1.1 1 5
7
9
11
13
15 gas space in mm
17
Thanks to Low E coating thermal exchange by radiation is stopped Thermal conductivity of air or gas is limiting the thermal insulation!
Why do we need Triple Glazing Units? The outer pane get colder and the inner pane get warmer: 2
DGU: 4mm / xx mm 90% Argon / PLT ULTRA N 4mm
1.9 1.8
UG in W/m²K
1.7 1.6
Ex
ur e ri é t
té n I
r u rie
1.5 1.4 1.3 1.2 1.1 1 5
7
9
11
13
15 gas space in mm
17
19
21
23
25
Natural convection within the gas space Stop improvement on Ug value
Next step: Triple glazed A glass put in between the gas space will block this natural convection: TRIPLE GLAZING UNIT! DGU: 4mm / xx mm 90% Argon / PLT ULTRA N 4mm TGU: PLT ULTRA N 4mm / xx mm 90% Argon / 4mm PLX / xx mm 90% Argon / PLT ULTRA N 4mm
1.9
1.7
de i s ut O
Ug in W/m²K
1.5
1.3
1.1
0.9
2 x 8mm 2 x 16mm
0.7
2 x 10mm
2 x 19mm
2 x 12mm 0.5 5
10
15
20
25 gas space in mm
30
35
40
de i s In
Triple Glazing Unit and solar factor Low E coatings are on side 2 and 5 in a TGU (risk of thermal breakage if coating side 3 or 4) Decrease of the Solar factor CLIMAPLUS ULTRA N
CLIMATOP ULTRA N
Glazing composition
4mm PLX / 16mm 90% Argon / PLT ULTRA N 4mm (3)
PLT ULTRA N 4mm (2) / 12mm 90% Argon / 4mm PLX / 12mm 90% Argon / PLT ULTRA N 4mm (5)
Ug
1.1 W/m²K
0.7 W/m²K
TL
80%
70%
g – value
0.63
0.50
0.1
0
If negative: Heat gain > losses
If positive : Heat losses > gain
Energy balance in Passiv Haus:
-0.1
-0.2
Passiv Haus criteria: Ug – 1,6 (W/m²K) x g -0.3
SGG CLIMAPLUS ULTRA N
SGG CLIMATOP ULTRA N
REF Passiv Haus
SGG CLIMATOP MAX
PLANITHERM range: Advanced performance low-E glass. SGG
PLANITHERM MAX: The first coating dedicated to triple glazing units Revolution in thermal insulation: A thermal insulation TWO times more SGG
performing than a Low E DGU. SEVEN times more insulating than a standard DGU without coating!
Ug W/m²K
DGU with PLT UN 1.1
TGU with PLT UN 0.7 – 0.5
TGU with PLT MAX 0.7 – 0.5
TL
80%
70%
74%
g – value
0.63
0.50
0.60
Exceptional energy balance Suitable for passive houses
SGG
PLANITHERM MAX
TRIPLE GLAZED UNIT: 4mm PLT MAX / 12mm gas / 4mm DIAMANT / 12mm gas / 4mm PLT MAX
Ug Value: 0.7 W/m²K (Argon) 0.5 W/m²K (Krypton) Light Transmittance TL: 74% Light Reflectance RL: 15% Solar factor g : 0.60
Same Solar gain as a Low E DGU with thermal insulation two times better!