- Contact Person : Mr. gu norman
- Company Name : Haining Aojin Solar Energy Industry Co., Ltd.
- Tel : 86-573-87872010
- Fax : 86-573-87888686
- Address : Zhejiang,haining city,No.3 chang yi road, yuanhua town, haining city
- Country/Region : China
- Zip : 314416
hard borosilicate solar vacuum tube
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Specification of solar vacuum tube:
The marerial of glass tube: hard borosilicate :3.3
The thickness of inner and outer tube of:1.6mm
Absorption coefficient: more 88%
Absorptive coating :high efficient heat absorptive selective coating:
AL-N/AL
Emission coefficient:less 10%(8%)
Evacuated :less5*10-3pa
Stagnation temperature: more 220 degrees 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(±10mm) | |
Properties of absorptive coating | Coating method | selective sputtering absoptive coating :AL-N/AL |
Transmissivity t≥ 0.89(AM1.5) | 0.918 | |
Absorptanceα≥ 0.86(AM1.5) | 0.883 | |
Emissivity εh≤0.080(30°C±5°C) | 0.041 | |
Pressure of vacuum tube: p≤5×10-2 Pa | 5×10-3 Pa | |
Stagnation parameter: Y>190sqm·°C/kW | 223.8 | |
Solar radiance: H<4.7MJ/sqm | 4.61 | |
Average heat loss coefficient: ULT<0.8W(sqm·°C) | 0.792
| |
Lifetime : | 10-15 years | |
hard borosilicate solar vacuum tube
