LiYang-3 new high quality Solar Vacuum Tubes

LiYang Solar Vacuum Tube:
Good economic environment;
three high vacuum tube;
cost-effective;
LiYang-3 Solar Vacuum Tube:
1. advanced: graded multi-layer magnetron sputtering of aluminum - nitrogen / aluminum coating solar selective absorption coating of new technology, the vacuum of not less than 1.33 × 10-3Pa, to further improve the efficiency of the vacuum tube collector.
2. timber stress: tube material selection consistent with QB/T2436-99 (idt) ISO4803-1978 standard of 3.3 Marino blank borosilicate glass tube manufacturing, its high transparency and good resistance to thermal shock , the optical stability of the strong.
3. Quality assurance: GB/T17049-1997 in strict accordance with national standards, meticulous organization, strict management of raw materials purchased from the beginning until the final product out of library staff work together strictly to the channel quality of products, To prevent unqualified products from



material
borosilicate glass 3.3
length
1500mm
inner tube diameter
47mm
outer tube diameter
58mm
membrane
gradient AL-N-C/AL selective absorbing coating
solar absorptance
> 0.09 (AM = 1.5)(international requirements as:>0.86)
hemisphere emission ratio
> 0.086 (80 °C) (international provisions: ≤ 0.09)
air drying performance parameters
≥186square meters.°C/kw(international requirements as:≥175)
The amount of sun radiation exposure stuffy
≤ 2.86MJ / m
2
(international provisions: ≤ 3.8)
Average heat loss coefficient
≤ 0.75W / m (International provisions: ≤ 0.90)
inside and outside the tube laminated tube
≤ 5 × 10-3pa (international provisions: ≤ 5 × 10-2pa)
heat shock
Below 25°C 90°C repeated alternating hot and cold water more than three times without damaging the impact of
pressure
withstand the pressure of 0.6Mpa
anti-hail
size of not more than 25mm can withstand without damage hail attack