The All Glass Evacuated Tube sold in both domestic market and international market is made of a kind of special glass just like PYREX. It is composed of inner tube and outer tube and evacuated between them. The outer side of the inner tube is covered by selective coating, converts solar radiation into heat (>92%) with almost no energy emission (<8.6%). This tube possesses many outstanding advantages, such as good thermal performance, high absorb efficiency, low heat losses, etc.
The main characteristics of the tube:
Material -----Special glass just like PYREX
Length -----1200~1500~1800 (mm) ± 5 mm
Outer diameter ------47~58(mm) ± 0.6 mm
Inner diameter ------37~47(mm) ± 0.6mm
Film structure ----- Al-N-C/Al selective absorber coating
Solar absorber efficiency ----- >0.92(AM=1.5)
Energy emission efficiency ----- <0.86(80℃)
Average heat loss efficiency --- <0.86(80℃)
Vacuum capacity --------- <5×10-3
Pressure bearing ----------- 0.6Mpa
Thermal shock endurance ----No problem after three times hot and cold water touch (>90℃ or <25℃)
The dimensions and the prices of the tube:
length diameter(inside/outside) Glass wall thickness coating
1200mm 37mm/47mm 1.6mm Al-N-Al selective material
1500mm 37mm/47mm 1.6mm Al-N-Al selective material
1800mm 47mm/58mm 1.6mm Al-N-Al selective materia |
|
|
|
|
