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Two target solar glass tube
Description:
Two target glass solar tube is made of high borosilicate glass 3.3,which will not break when the stainless steel ball(diameter 30mm) drop from the height of 450mm.
The coating of this tube is SS-C/Cu,which can not only ensure the high absorptivity and low emission,but it can also guarantee the lifespan of coating reach to 15 years or even longer.
Specification | |
Structure | All glass double tubes concentric |
Material | Borosilicate glass 3.3 |
Outer tube diameter | Φ47±0.7.mm &=1.6mm |
Inner tube diameter | Φ58±0.7.mm &=1.6mm |
Length | 47mm-1500mm/1600mm/1800, |
58mm-1500mm/1600mm/1800mm/2000mm/2100mm | |
Coating | SS-C/Cu |
Absorption rate after evacuating(AM1.5) | α= 0.88-0.90 |
Emission rate after evacuating(AM1.5) | ε= 0.04-0.06(80°C±5°C） |
Vacuum degree | P≤5.0×10³Pa |
Average heat loss conficient | ULT = 0.4-0.6w/(m².°C) |
Max stagnation temperature (temperature inside of empty vacuum tube) | 260°C-300°C |
Pressure | 0.6MPa |
Impact Resistance | Φ≤25mm |
Two coating glass solar tube