all glass solar collector

all glass solar collector:
1.OEM offered
2.three target coating(AL-AL-ALN/ALN)
3.15 years quality warrant
all glass solar collector
Features:
Vacuum tube
High solar-thermal conversion and low heat loss
Stable advanced coating up to 380
Long time warranty to 15 years
High level vacuum ensure operation under cold weather
Vacuum Tube technology:
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