High Quanluity Normal Vacuum Tube
Consists of two glass tubes which are fused together at one end. The inner tube is coated with a selective surface that absorbs solar energy well but inhibits Radiative heat loss. The air is withdrawn ("evacuated") from the space between the two glass tubes to Form a vacuum, which eliminates conductive and convective heat loss. These tubes perform very well in overcast conditions as well as low temperatures. Because the tube is 100% glass, the problem with loss of vacuum due to a broken seal is greatly minimized. Glass-glass solar tubes may be used In a number of different ways, including direct flow or heat pipe configuration.
Technical data table:
Outer tube diameter:47mm/58mm
Inner tube diameter:37mm/47mm
Material:Borosilicate Glass 3.3 Borosilicate Glass 3.3
Absorptive Coating: AL/N/AL AL/N/AL
Absorption coefficient: >92% >92%
Emission coefficient: <8% <8%
Vacuum: P<5x10-2Pa P<5x10-2Pa
Stagnation Temperature: >200>200
Net weight: 2.1kg
Sales:Mr. Ken Sun
Main Products:Solar Water Heaters
Business type:Manufacturer, Trading Company, Agent
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