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Tubes
Tubes

All-glass evacuated 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The air is withdrawn ("evacuated") from the space between the two glass tubes to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,

Normal vacuum Tube
Normal vacuum Tube

All-glass evacuated 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The air is withdrawn ("evacuated") from the space between the two glass tubes to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,

Normal vacuum tube
Normal vacuum tube

All-glass evacuated 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The air is withdrawn ("evacuated") from the space between the two glass tubes to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,

three target vacuum tube
three target vacuum tube

Three-target Vacuum Tube

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Heat pipe vacuum tubes
Heat pipe vacuum tubes
Product Details
 heat pipe vacuum tube has a low thermal capacity and rapid heat
exchange(it is 1000 times of copper heat exchange speed)
heat-pipe vacuum tube 
 heat pipe has a low thermal capacity, and has rapid heat exchange (it is
1000 times of copper heat exchange speed, so it is an available fast heat
exchanger. Heat exchange rate is up to 99%. The startup is fast, collect solar
energy fully, at 25,5 seconds can startup heat. At the same time, it h
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