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Thermal-insulation
Trabnsparent heat insulation
ROOF CONSTRUCTIONS of
semi-transparent glass lattice fabric.
Special features concerning:
- Light-transmission
- Energy-transmission
- Heat-insulation coefficient
- Sound-insulation
- Room-acoustics
Usually membrane constructions have no heat
insulation.
From this some disadvantages result:
- High surface temperatures by sun-radiation
causing problems in thermic comfort - too hot.
- Low surface temperatures in cold nights
causing drop in temperature, problems in thermic comfort.
- Dew-water development at the inner surface,
risk of mildew.
BY A SPECIAL GLASS FIBRE INLAY the flontex
roof system gets a higher standard of heat insulation. In spite of heat
insulation the roof is still translucent. About 50% of the light passes through
the heat insulation. Together with the PTFE-glass fibre fabric on top- and
bottomside the transmission can be reduced so far, that no problems of blinding
appear.
The flontex roof brings daylights at moderate heat increasing during sunny hours.
At clear sunny days about 200 W/m² get inside. The intensity of lighting is
around 20,000 lux at noon (in comparision, 300 to 500 lux are required in
offices). Even at very cloudy days the illumination is about 2,000 lux. In cold
nights the good heat insulation prevents from extremly cooling-down. There is no
appearance of dew-water.
Construction
Material
|
Degree
of transmission |
| PTFE-glass lattice
fabric |
54
% |
| glass fibre tissue |
55
% |
| PTFE-glass lattice
fabric |
54
% |
Thermophysical characteristic of the whole construction
| heat exchange
coefficient |
k |
= 1,1 W/m²K |
total degree of
energy permeability
|
g |
= 26% |
degree of
transmission
|
 e |
= 20% |
| degree of
reflection |
 e |
= 43% |
degree of light transmission
|
L |
= 22% |
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