- Contact Person : Mr. Yan Alex
- Company Name : Zhejiang Meida Solar Energy Industrial Co., Ltd.
- Tel : 86-573-87817706
- Fax : 86-573-87811090
- Address : Zhejiang,Haining,60k East and West Road, Haining City, Zhejiang Province. China
- Country/Region : China
- Zip : 314416
solar vacuum tube
MODEL ITEMS | GB(single target) | SG(three target) | ||
Configuration | Double-layer concentric boronsillicate glass tubes | Double-layer concentric boronsillicate glass tubes | ||
Glass thermal expansion coefficient | 3.3*10-6/°C | 3.3*10-6/°C | 3.3*10-6/°C | 3.3*10-6/°C |
Diameter of outer tube | φ47±1mm | φ58±1mm | Φ47±1mm | Φ58±1mm |
Diameter of absorber tube | φ37±1mm | φ47±1mm | Φ37±1mm | Φ47±1mm |
Thickness | 1.5mm(±0.1mm) | 1.6mm(±0.1mm) | 1.5mm(±0.1mm) | 1.6mm(±0.1mm) |
Transmittance of outer tube | 0.91 | 0.91 | 0.91 | 0.91 |
Length | 1500±5mm | 1800±5mm | 1500±5mm | 1800±5mm |
Solar selective absorbing coating | Al-N/Al | Al-N/Al | AIN/AIN-SS/Cu | AIN/AIN-SS/Cu |
Absorptance(AM1.5) | ≥0.89 | ≥0.89 | ≥0.92 | ≥0.92 |
Emittance | ≤0.08(80°C) | ≤0.08(80°C) | ≤0.07(80°C) | ≤0.07(80°C) |
Vacuum | P≤5*10-2Pa | P≤5*10-2Pa | P≤5*10-2Pa | P≤5*10-2Pa |
Pressure-endure ability | 0.6mPa | 0.6mPa | 0.6mPa | 0.6mPa |
solar vacuum tube