- Metal Coating Machinery[10]
- Cleaning Equipment[10]
- Metal Processing Machinery Parts[1]
- Cast & Forged[2]
- Titanium Sheets[1]
- Other Metals & Metal Products[3]
- Other Machinery[7]
- Solar Collectors[5]
- Other Solar Energy Related Products[2]
- Machinery Parts Processing Services[1]
- Plastic Product Making Machinery[1]
- Contact Person : Ms. Chen Sharon
- Company Name : Beijing Logon Sci. & Tech. Deve. Co., Ltd.
- Tel : 86-10-62477220
- Fax : 86-10-62474518
- Address : Beijing,Beijing,Room B-1409, Sigma Plaza, No. 49 Zhichun Road, Haidian District
- Country/Region : China
- Zip : 100086
solar vacuum tube
Vacuum tube is inosculated by two glass tube at one end.inner tube with a selective coating, it can absorb the solar energy, prevent heat loss.Underpressure the air to form vacuum between the two tubes , prevent the conduction and convection heat loss.These tubes have high efficiency in the cloudy weather and low temperature conditions.This is because the tube material is glass, therefore the possibility of leakage be reduced to a minimum. Glass vacuum tube have a wide range of uses, including the DC or mixed with the heat pipe. Although the efficiency of the vacuum tube is lower than cryotron, but cheaper.
technical parameter:
Model type | TG47 | TG58 |
Length | 1500mm | 1800 |
Outer tube diameter | 47mm | 58mm |
Inner tube diameter | 37mm | 47mm |
Glass thickness | 1.5mm | 1.5mm |
Thermal expansion | 3.3x10-6 | 3.3x10-6 |
Material | 3.3 | 3.3 |
Absorptive Coating | AL/N/AL | AL/N/AL |
Absorption coefficient | >90% | >90% |
Emission coefficient | <10% | <10% |
Vacuum | P<5x10-2Pa | P<5x10-2Pa |
Stagnation Temperature | >200oC | >200oC |
Net weight | 1.20kg | 2.23kg |
solar vacuum tube
