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Supply High Quality Solar Vacuum Tube Solar Vacuum Tubes
Solar Vacuum Tubes
1.High heat efficiency
2.Stable performance
3.Fast thermal collecting
4.47/58/70mm in diameter
Tube Series |
Single Target Coating Solar Vacuum Tube |
Three Target Coating Solar Vacuum Tube |
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Tube structure |
All-glass double-tube co-axial structure |
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Glass material |
Borosilicate 3.3glass |
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Outer tube diameter and glass thickness |
Φ=47±0.7mm &=1.6mm ±0.15mm |
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Inter tube diameter and glass thickness |
Φ=37±0.7mm &=1.6mm ±0.15mm |
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Absorptive coating propertyproperty |
Structure |
Glass/AL/AL-ALN(H)/AL-ALN(L)/ALN |
Cu-SS-ALN |
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Sediment method |
1 target magnetron sputtering |
3 Targets magnetron sputtering |
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Absorption ratio |
α=0.90~0.92(AM1.5) |
α=0.93~0.96(AM1.5) |
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Emission ratio |
ε=0.09~0.1(80°C±5°C) |
ε=0.05~0.075(80°C±5°C) |
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Vacuum tightness |
5.0×10-3 Pa |
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Heat loss |
0.6-0.76W/(m2.°C) |
0.4 -0.6W/(m2.°C) |
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Resist cold |
-20°C |
-25°C |
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Resist high temperature |
220°C |
250°C |
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Service life |
12 Years |
15 Years |
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1. Heat-pipe conduction, no water inside, thus it is successfully prevented from the defects of tube block and low power output caused by water fouling and deposits of mud and sand.
2. It prevents the tube from being easily broken caused by the volume expansion when the water in tube freezes in frigid season.
3. Start up quickly. Energy inside the tube can be taken out within 2 minutes under sunshine. The stagnation temperature of the heat-pipe can reach 220 °C
4. High efficient selective absorptive coatings and vacuum heat insulation technology ensure the tube to get higher heat output in cloudy weather and in moist area, especially in winter.
5. Solar collecting plate is installed and sealed inside the tube of high-quality borosilicate glass with 5x10-3Pa of vacuum, so it cannot be corroded event in moist area
6.It perfectly solves the fetal defect of the common all-glass vacuum tube solar water heater, which cannot run if one of the tubes is out of work.
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