Tube structure

All-glass double deck co-axial structure

Glass material

High borosilicate 3.3 glass

Outer tube diameter and glass thickness

Φ47±0.7mm; Glass thickness 1.6±0.15mm

Φ58±0.7mm; Glass thickness 1.6±0.15mm

Inner tube diameter and glass thickness

Φ37±0.7mm; Glass thickness 1.6±0.15mm

Φ47±0.7mm; Glass thickness 1.6±0.15mm

Tube length

1500mm,1800mm, 1900mm, 2100mm

Absorptive coating property

Coating material

AL/AL-ALN(H)/AL-ALN(L)/ALN

Sediment method

Single target magnetron sputtering plating

Absorptivity

α=0.90~0.93(AM1.5)

Emission ratio

ε=0.05~0.075(80°C±5°C)

Vacuum degree

P≤5.0×10-3 Pa

Stagnation temperature (temperature inside of empty evacuated tubes)

220~260°C

Average heat loss

ULT=0.6~0.7W/(m2*°C)

Hail resistence

Φ25mm

Pressure endure

0.6MPa