All Glass Vacuum Tube

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All Glass Vacuum Tube
Posting date : Oct 29, 2007
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S06-
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(Glass-Glass) tubes 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 The air is withdrawn ("evacuated") from the space between the two glass tubes to form a vacuum, which eliminates conductive and convective heat loss.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. Deosun uses a high efficiency heat pipe and heat transfer fin design to conduct the heat from within the evacuated tube up to the header.

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