Zhonglou Development District,Changzhou City
86-519-68880110
86-13915027733
(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The air is withdrawn ("evacuated") from the space between the two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.
Technical data table
Model tape | TG47 | TG58 |
Length | 1500mm | 1800 |
Outer tube diameter | 47mm | 58mm |
Inner tube diameter | 37mm | 47mm |
Glass thickness | 1.5mm | 1.5mm |
Thermal expansion | 3.3x10-6℃ | 3.3x10-6℃ |
Material | Borosilicate Glass 3.3 | Borosilicate Glass 3.3 |
Absorptive Coating | AL/N/AL | AL/N/AL |
Absorption coefficient | >90% | >90% |
Emission coefficient | <10% | <10% |
Vacuum | P<5x10-2Pa | P<5x10-2Pa |
Stagnation Temperature | >200℃ | >200℃ |
Net weight | 1.20kg | 2.23kg |
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