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Solar Tube (SFVA)
Product Detailed
Apply for selective absorbing coating material of normal all-glass vacuum tube to collect solar energy;
SFVA4715
Diameter: 47mm
Length: 1.5M
SFVA5818
Diameter: 58mm
Length: 1.8MApply for selective absorbing coating material of normal all-glass vacuum tube to collect solar energy
SFVA4715
Diameter: 47mm
Length: 1.5M
SFVA5818
Diameter: 58mm
Length: 1.8M
Length | 1500mm | 1800mm |
Outer tube diameter | 47mm | 58mm |
Inner tube diameter | 37mm | 47mm |
Weight | 1.3kg | 2.2kg |
Glass thickness | 1.6mm | 1.6mm |
Material | Borosilicate Glass 3.3 | Borosilicate Glass 3.3 |
Absorptive coating | Graded A1/N/A1 | Graded A1/N/A1 |
Vacuum degree | P<5*10 -3 Pa | P<5*10 -3 Pa |
Thermal expansion | 3.3*10 -6 /°C | 3.3*10 -6 /°C |
Insolation Temperature | >200°C | >200°C |
Absorptance | >93% | >93% |
Emittance | <8% | <8% |
Heat loss | <0.8W/(m 2 °C) | <0.8W/(m 2 °C) |
Maximum strength | 0.8Mpa | 0.8Mpa |
Resist cold | -35 °C | -35 °C |
Resist hailstone | Ø 25mm | Ø 25mm |
Resist wind | 30m/s | 30m/s |
Start-up temperature | <=25°C | <=25°C |
| Item No. | Specification | Effective collector area m 2 | |
| Diameter of solar tube | Length of solar tube | ||
| SFVA4715 | Ø47mm | 1.5M | 0.0966 |
| SFVA5818 | Ø58mm | 1.8M | 0.1350 |
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