Ads by Google
Specification of all glass solar tube:
The marerial of glass tube: hard borosilicate :3.3
The thickness of inner and outer tube of:1.6mm
Absorption coefficient: more than 93%
Absorptive coating :high efficient heat absorptive selective sputtering coating:
SS-C/CU and AL-N/AL
Emission coefficient: less than 10%(8%)
Evacuated : less than 5*10-3pa
Stagnation temperature 220 degree Celsius
Hail resistance 25mm
Freezing resistance -35 degree Celsius
Structure |
| Dual concentric geometry tube |
Material of glass | hard borosilicate:3.3 | |
Diameter and thickness of outer tube | Ø58±0.5mm&1.6mm | |
Diameter and thickness of inner tube | Ø47±0.5mm&1.6mm | |
Length of vacuum tube | 1800mm(±mm) | |
Properties of absorptive coating | Coating method | selective absorptive sputtering coating: SS-C/cu & AL/N |
Transmissivity t≥ 0.89(AM1.5) | 0.913 | |
Absorptance α≥ 0.86(AM1.5) | 0.930 | |
Emissivity εh≤0.080(30degree±5degree) | 0.026 | |
Pressure of vacuum tube p≤5×10-2 Pa | 5×10-3Pa | |
Stagnation parameter Y>250sqm·degree/kW | 246.3 | |
Solar radiance H<4.7MJ/sqm | 4.59 | |
Average heat loss coefficient: ULT<0.8W(sqm·degree) | 0.721 | |
Lifetime | 10 years | |
all glass solar tube