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Specifications
1.Standard 3.3 high-boron-silicon glass-pipe2.Low coefficient of heat loss,
3.Without water and high efficent of heat absor
Three target glass solar tube
The inner tube of this product is coated with a special coating (SS-ALNx/Cu) which features excellent solar radiation absorption and minimal reflection.
To guarantee the perfect vacuum status,there is one barium getter in the bottom of the inner tube which cause the bottom of the solar tube is coated with a pure layer of barium. The barium will become white if the vacuum is lost.Therefore,this barium layer work as the visual inspector.
Raw material |
high borosilicate glass 3.3 |
Glass thickness |
1.6mm |
Outer tube length |
1500mm,1600mm,1800mm,2000mm,2100mm |
Outer tube diameter |
47mm±0.7mm, 58mm±0.7mm |
Inner tube diameter |
37mm±0.7mm, 47mm±0.7mm |
Coating material |
SS-ALNx/Cu |
Absorptance |
0.90~0.95 (AM1.5) |
Emittance |
0.04-0.06(80°C±5°C) |
Vacuum degree |
≤5.0×10³ (Pa) |
Stagnation temperature |
260°C~300°C |
Average heat loss coefficient |
0.4~0.6W/(m².°C) |
Hail resistance |
≤25mm |
|
Solar irradiation for obtaining a preset water temperature rise in tube under stagnation |
3.7~4.2MJ/m²(Φ58mm) 2.9~3.2MJ/m²(Φ47mm) |
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