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Help CenterCustomized Solar Water Heater Accessories Vacuum Tube, Evacuated Glass Tubes
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Customized Solar Water Heater Accessories Vacuum Tube, Evacuated Glass Tubes
Solar Water Heater Accessory Vacuum tube (evacuated tube)
Applications:
Vacuum tubes are used for solar water heaters and solar collectors.
Specifications:
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Structure |
All-glass concentric dual tube geometer |
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Glass material |
Borosilicate glass |
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Outer tube diameter and thickness |
Φ=47±0.7mm & =1.5mm |
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Inter tube diameter and thickness |
Φ=37±0.7mm & =1.5mm |
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Tube Length |
1200(±5mm)1500(±5mm) |
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|
Absorbing |
Configulation |
1200(±5mm) 1500(±5mm) |
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Method to deposition |
Graded A1-N/A1 solar selective absorbing coating |
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absorptance |
as 0.88-0.93 |
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Emittance |
Σn:-.08-0.04 |
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Vacuum |
p ≤ 2 × 10-3pa |
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Stagnation parameter |
＞250M2C/KW |
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Solar radiation exposure for obtaining a preset water temperature |
＜2.8MJ/M2 |
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Average heat loss coefficient |
＜0.8W(M2C) |
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Lifetime |
15years |
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