solar collector vacuum tube

Models

47×150

58×180

Weight

1.35±0.12kg

2.29±0.18kg

Structure

All-glass-coaxial double-layer tubes

All-glass-coaxial double-layer tubes

Outer tube diameter

47±0.7mm

58±0.7mm

Inner tube diameter

37±0.7mm

47±0.7mm

Outer Tube thickness

1.6±0.15mm

1.8±0.15mm

Inner tube thickness

1.6±0.15mm

1.8±0.15mm

Tubes length

1542±4mm

1812±4mm

Material of coating

Al N/Al N-SS/Cu

Al N/Al N-SS/Cu

Absorptance

0.94~0.96

0.94~0.96

Emittance

0.04~0.06

0.04~0.06

Vacuum

P≤5×10-3pa

P≤5×10-3pa

Transmittance of Outer Tube

0.91

0.91

Stagnation temperature (height)

270~300

270~300

Heat-loss coefficient

≤0.6w/ m2*)

≤0.6w/ m2*)

Bearing hailstone ability

hailstone diameter25mm

hailstone diameter25mm

Pressure-endure ability

1MPa

1MPa