Solar Vacuum Tube

solar vacuum tube
1.The strong compressive ability
2.tube use purple gold technology
Good Quality Solar Vacuum Tube:

Product description :

Tube Length
1200(±5mm)1500(±5mm)
1700-1800(±5mm)
2000(±5mm)
Absorbing
coating
properties
Configulation
1200(±5mm) 1500(±5mm)
1700-1800(±5mm)
2000( ±5mm)
Mothod to deposition
Graded A1-N/A1 solar selectuve absorbing coating
absorptance
as 0.88-0.93
Emittance
Σn:-.08-0.04
Vacuum
p ≤ 2 × 10
-3
Stagnation parameter
250M
2
C/KW
Sloar rediance exposure for obtaining a preset water temperature
2.8MJ/M
2
Average heat loss coefficient
0.8W(M
2
C)
Lifetime
15years



The picture of product