Strucure |
All-glass concentric dual tube geomer |
Glass material |
Borosilicate glass |
Outer tube diameter and thickness
|
Φ=47±0.7mm & =1.5mm
Φ=58±0.7mm & =2mm
Φ=70±0.7mm & =2mm |
Inter tube diameter and thickness |
Φ=37±0.7mm & =1.5mm
Φ=47±0.7mm & =1.6mm
Φ=58±0.7mm & =1.6mm |
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 |
AL-N/A1 selective absorptive coating |
absorptance |
as 0.88-0.93 |
Emittance |
Σn:-.08-0.04 |
Vacuum |
p ≤ 2 × 10-3 PA |
Stagnation parameter |
＞250M2C/KW |
Sloar rediance exposure for obtaining a preset water temperature
|
＜2.8MJ/M2 |
Average heat loss coefficient
|
＜0.8W(M2C) |
Lifetime |
15years |
