Manufacturer of Solar Vacuum Tube

Manufacturer of Solar Vacuum Tube
1).three targe coating film
2).collector diamter bigger
3).high temperature
Solar Vacuum Tube


Product Description

Length
1500mm
1800mm
Outer Tube Diameter
47mm
58mm
Inner Tube Diameter
37mm
47mm
Weight
1.4kg
2.3kg
Glass Thickness
2.0mm
2.0mm
Material
High Borosilicate glass 3.3
High Borosilicate glass 3.3
Absorptive coating
Graded Cu-Ss- Al/N/Al
Graded Cu-Ss-Al/N/Al
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/(m2°C)
<0.8W/(m2°C)
Maximum Strength
0.8MPa
0.8MPa
Resist Hailstone
30m/s
30m/s
Resist cold
Ø 30mm
Ø 30mm
Resist wind
30m/s
30m/s
Start-up Temperature
<=25°C
<=25°C



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