electrochromic laminated glass gesimat ec - berlin innovation · switching sequence of an...
TRANSCRIPT
Switching sequence of an electrochromic laminated glass
Electrochromic Laminated GlassGesimat EC
- gradual change of light and heat transmission
- in the visible spectral range between 8 and 75 %
- in the total range of solar radiation between 6 and 52 %
- contrast ratio > 9 : 1
- switching time about 10 min for one complete switching step
- switching voltage ca. 1-3 V d.c.
- the reflectivity does not change
Construction and Delivery Form
Function and Use
SwitchableWindows
- electrically switchable flat glass laminates for building glazing
- two coated glass panes + ion conducting PVB interlayer
- lamination with LSG process, LSG compatible construction for
further processing to double or triple pane IGU
- electrical connections with wires from the laminated EC glass
- available formats: up to 1000 mm x 2400 mm
- thickness: e.g. 9 mm or 13 mm (always 2 x glass + foil)
- with electronic control unit
- can be delivered as laminated EC glass or as EC IGU
An electrochromic layer system sandwiched between two glass
panes of a laminated glass can be reversibly switched between
colorless and blue by application of small d.c. voltages.
Energy is only necessary for switching between different coloration
states, not for retaining a switching state.
- regulation of light and heat transmission through a glazing
without additional mechanical shading is now possible
- prevention of overheating and glare due to intensive solar radiation
- a high light transmission (75%) in the bleached state enables an
efficient daylight use and solar energy gains in winter
- a free view through the glass from inside the building is always
maintained
Transmission Control during Switching
Glass
Glass
TCO
TCO
Polymer electrolyte
First electrochromic layer
Second electrochromic layer
Uncharged Charged
ExternalIrradiation
Reflection
Transmission Transmission
Reflection
Absorption
ExternalIrradiation visvis
IR IR
Innovationspark WuhlheideBuilding 201Koepenicker Str. 32512555 BerlinGermany
Phone: +49 (0)30 / 47389251 +49 (0)30 / 47389252e-mail: [email protected]: www.gesimat.de
Switching effect
Electrotropic Laminated GlassGesimat ET
- gradual variation of the specular transmission (clear view)
- switching time about 1 second
- switching voltage 35-115 V A.C.2- energy demand: 10 W / m in the transparent state
- total light transmittance (diffuse + directional) changes between
84 % (clear state) and 74 % (milky state)
Electrotropic windows can be switched by the user between a
transparent and a milky glass state. Two options are available:
digital switching on / off or gradual switching.
Electrotropic glass laminates are especially well suited for
switchable privacy applications.
You can choose by yourself, if you are visible by other people or not.
Even with privacy function on, you still have nearly the same
light and heat transmittance through the glass as with clear view.
Electrotropic glass is ideally suited for temporary separation of
private or business areas (bathrooms, kitchen, meeting rooms etc.).
Transparent Milky glass
500 750 1000 1250 1500 1750 2000 2250 25000
10
20
30
40
50
60
70
80
90
100 0 V t
V=0
20 V tV=0,01
30 V tV=0,10
40 V tV=0,32
60 V tV=0,56
120 V tV=0,67
Directional Transmission Degree
Wavelength / nm
Tra
nsm
itta
nce
/ %
- electrically switchable flat glass laminates for building glazing
- two glass panes + interlayer + electrotropic foil
- LSG compatible construction for further processing to double
or triple pane IGU
- electrical connections with wires from the laminated ET glass
- delivery sizes: up to 1100 mm x 2530 mm
- thickness: e.g. 7, 9,11 or 13mm (always 2 x glass + foil)
- with electrical control unit, optional mit dimmining function
- can be delivered as laminated ET glass or as ET IGU
Innovationspark WuhlheideBuilding 201Koepenicker Str. 32512555 BerlinGermany
SwitchableWindows
Transmission Control during Switching
Construction and Delivery Form
Function and Use
Without VoltageWith Voltage
Reflection
Directional
Reflection
DiffuseExternalirradiation
Externalirradiation
IR
vis vis
IR
Phone: +49 (0)30 / 47389251 +49 (0)30 / 47389252e-mail: [email protected]: www.gesimat.de
Glass
Glass
Interlayer
Interlayer
Electrotropic Film
Thermochromic Laminated GlassGesimat TC
- gradual change of the light transmittance in dependence on
glass temperature
- in the visual spectral range between 74% (20°C) and 23% (62°C)
- contrast ratio > 3 : 1
- NIR range is also switching
- nearly color neutral TC anthracite
- also available as TC blue and TC bronze
Glass
Glass
Thermochromic Interlayer
300 400 500 600 700 800 900 1000 11000
10
20
30
40
50
60
70
80
90
100
bleached tV=0.74
colored tV=0.23
Wave length / nm
Tra
nsm
itta
nce
/ %
20°C
62°C
SwitchableWindows
- thermally switching flat glass laminates for building glazing
- two glass panes + thermochromic interlayer
- lamination with LSG process, LSG compatible construction for
further processing to double or triple pane IGU
- no electrical connections and no electronic control unit necessary
- delivery sizes: up to 1100 mm x 2530 mm
- thickness: e.g. 7, 9,11 or 13 mm (always 2 x glass + foil)
- can be delivered as laminated TC glass or as TC IGU
Innovationspark WuhlheideBuilding 201Koepenicker Str. 32512555 BerlinGermany
Construction and Delivery Form
Function and Use
Transmission Control during Switching
Uncolored Colored
External
External
Irradiation
Reflection
Transmission Transmission
Reflection
Absorption
Irradiation visvis
IR IR
Phone: +49 (0)30 / 47389251 +49 (0)30 / 47389252e-mail: [email protected]: www.gesimat.de
Thermochromic glasses are glass laminates whose light trans-
mittance varies as a function of glass temperature. Special
substances in the interlayer sheet, which itself colorize by heating,
are responsible for this property.
Advantage of the thermochromic glazing is their function without
any wiring and control. The switching takes place automatically as
a result of the heating of the panes by the absorbed solar energy.
The higher the glass temperature, the deeper is the coloring. The
switching takes only place when it is necessary: in direct sunlight
and warm weather. In cold weather on the other hand, the panes
remain bright and ensure secondary energy gains by light
and heat.