Evacuated tubes
Evacuated tubes
Key component of the forced circulation systems (collectors) and thermosiphons
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Coating material SS-AL/N/Cu or SS-AL/N/Cu
Scope of delivery Evacuated tubes are packed in boxes.
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Specification
| Item | ||
| Absorbance rate after coating (AM 1.5) | α% | ≥94.5 |
| Absorbance rate after evacuating (AM 1.5) | α% | ≥93.5 |
| Emission rate after coating (80±5°C) | α% | ≤6 |
| Emission rate after evacuating (80±5°C) | α% | ≤6.5 |
| Stagnation parameter | m²°C/Kw | ≥240 |
| Solar radiance exposure | MJ/m² | ≤3.0 |
| Average heat loss coefficient | W/(m²°C) | ≤0.70 |
| Selective coating material | SS-AL-N/Cu, SS-AL-N/Cu | |
| Impact resistance | Steel Ball Test: Steel ball with diameter of 30 mm fall on the evacuated tube vertically from 450 mm height. | |
| Vacuum Degree | Pa | ≤3x10(-3) |
| Pressure | MPa | 0.6 |
| Transparent (AM 1.5) | ≥0.89 (ISO9806-1: 1994) |
For further information please contact our sales team