Single Target General Solar Water Heater Tube

1)borosilicate glass 3.3
2)OD:58mm/47mm
3)Length:1200mm-2200mm
4)Thickness:1.6mm/1.8mm
General solar collector vacuum tube:
Its mental layer at bottom is typically made of aluminum. Absorption layer and antireflective layer are compound of Nitrogen and aluminium ion.Membranous layer is about 0.3 micron.
Our solar collector tube stands out not only because of its quite low emission rates, but also because its production is emission-free and energy-efficient.






Configuration
General solar collector tube
Material
Borosillicate glass
Glass thermal expansion coefficient
3.3×10-6
Diameter of cover tube
47mm/58mm
Diameter of inner tube
37mm/47mm
Thickness of glass
1.6mm
Transmittance of cover tube
0.91
Length
1200 / 1500 /1800mm
Solar selective absorbing coating
Graded Al-N/Al selective surface, sputtering
Solar absorptance(AM1.5)
0.9
Emittance(80)
0.08
Stagnation Temperature
≥200
Heat loss coefficient
≤0.80W
Impact resistance
Withstand hailstone of 25 mm in diameter
Strength(pressure tested)
1MPa