Heat Pipe Solar Vacuum Tube

Tube structure

All-glass double-tube co-axial structure

Glass material

Borosilicate 3.3glass

Outer tube diameter and glass thickness

Φ =47± 0.7mm & T=1.6mm ± 0.15mmΦ =58± 0.7mm & T=1.6mm ± 0.15mm

Inter tube diameter and glass thickness

Φ =37± 0.7mm & T=1.6mm ± 0.15mmΦ =47± 0.7mm & T=1.6mm ± 0.15mm

Tube length

1500mm, 1800mm

Absorber coating

Coating material

AL-N/SS/Cu

Sediment method

Three Targets magnetron sputtering plating

Absorption

a: ≥92%(AM1.5)

Emittance

ε ≤ 3.4% (80° C± 5° C)

Vacuum degree

P ≤ 5.0× 10 -3 Pa

Transmittance of glass tube

T ≥ 91% (AM1.5)

Stagnation parameter

Y: > 218 m² ° C/kw

Average heat loss

ULT≤ 0.60W/(m² *° C)

Hail resistance

Φ 25 mm

Pressure-endure

0.8 Mpa

Temperature-endure

250° C

Life

> 15 years

Suitable for Glass vacuum tube size

58*1800mm

Material of heat pipe

copper

Condenser part diameter

14mm

Main part diameter

8mm

Condenser part thickness

1mm

Main part thickness

0.8mm

Insolation temperature

250°C

Start time

1-3 Minitues

Min working temperature

-30°C