|
Item |
Φ47-1500 |
Φ58-1800 |
|
Material of Tube |
3.3 High Boron Silicon |
3.3 High Boron Silicon |
|
Glass Expansion Ratio |
(3.3±0.1)×10-6K-1 |
(3.3±0.1)×10-6K-1 |
|
Outer Diameter of Tube |
Φ47±0.1 |
Φ58±0.1 |
|
Inner Diameter of Tube |
Φ37±0.1 |
Φ47±0.1 |
|
Thickness of Glass |
1.6±0.1 |
1.6±0.1 |
|
Transmittance |
≥0.89 |
≥0.89 |
|
Length of Tube |
1500±0.5﹪ |
1800±0.5﹪ |
|
Selective Coating |
AL-N/AL or SS-CU- AL-N/AL |
AL-N/AL or SS-CU- AL-N/AL |
|
Absorptivity |
≥0.86(AM1.5) |
≥0.86(AM1.5) |
|
Emissivity |
≤0.080(80℃±5℃) |
≤0.080(80℃±5℃) |
|
Vacuum Degree |
≤5.0×10-3Pa |
≤5.0×10-3Pa |
|
Collecting Performance Parameter under Sunshine |
≥190m2℃/kw |
≥190m2℃/kw |
|
Hailstone Resistance |
Ф25mm |
Ф25mm |

1. Fine material 2. High quality 3. Excellent technology