Solar evacuated tube 1.coating material:SS-C/Cu 2.certificate:CE ISO9001 TS 3.OEM is available 5.testing machine:UV 3600
Solar tube
The out surface of the ineer tube is double coated with stainless steel and copper when adopting the newest magnetron sputtering coating technology. This type of selective coating (SS-C/Cu) can withstand very high temperature. This is important because the tube is exposed in high temperature to evacuate the gas in the jacket between the inner tube and the outer tube. The solar energy absorption ability should be above 93%.
Specification | |
Structure | All glass double concentric tubes |
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≤5.0×10¯³Pa |
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 |
Dual target solar evacuated tube
