Three target solar vacuum tube in new style

solar vacuum tube
.Certification:CE,ISO9001
.OEM offerd
.Warranty 15 year
.Higher absorptance ,lower emittance


Tube structure
All-glass double-tube co-axial structure
Glass material
Borosilicate 3.3glass
Outer tube diameter and glass thickness
Φ=47±0.7mm &=1.6mm ±0.15mm
Φ=58±0.7mm &=1.6mm ±0.15mm
Φ=70±0.7mm &=2.0mm ±0.15mm
Inter tube diameter and glass thickness
Φ=37±0.7mm &=1.6mm ±0.15mm
Φ=47±0.7mm &=1.6mm ±0.15mm
Φ=58±0.7mm &=1.6mm ±0.15mm
Tube length
1200mm,1500mm,1600mm, 1800mm, 1900mm ,2000mm , 2100mm
Absorber coating
Coating material
Cu/SS-AIN
Sediment method
Three Targets magnetron sputtering plating
Absorptivity
a:≥0.93(AM1.5)
Emittance
ε≤6.5% (80°C±5°C)
Vacuum degree
P ≤5.0×10
-3
Pa
Transmittance of glass tube
T:≥0.89(AM1.5 ISO9806-1:1994)
Stagnation parameter
Y :200~240 m²°C/kw
Average heat loss
ULT≤0.65W/(m²,°C)
Hail resistance
Φ25 mm
Pressure-endure
0.6 Mpa