Solar Water Heater

Solar vacuum tube Single target coated AL-ALN
Single-target vacuum tube performance and specification:
Tube structure All-glass double deck co-axial structure
Glass material 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
Φ70± 0.7mm; Glass thickness 2.0± 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
Φ58± 0.7mm; Glass thickness 1.6± 0.15mm
Tube length 1200mm, 1500mm, 1600mm, 1800mm, 1900mm, 2000mm, 2100mm* with tolerance of 5mm
Absorber coating Coating material AL-ALN
Sediment method Single Target magnetron sputtering plating
Absorptivity α : 0.900.93 (AM1.5)
Vacuum degree P≤ 5.0X10-3 (PA)
Transmittance of glass tube T≥ 0.89 (AM1.5 ISO9806-1: 1994)
Stagnation parameter Y≥ 200/kW
Average heat loss ULT: 0.65-0.75 W/(m2 *)
Hail resistance 25 mm
Pressure-endure 0.6 MPa
Detailed Product Description: All-glass evacuated tubes are made from untra-strong and heat resistance Borosilicate 3.3 with a double structure. The tubes coating adopts vacuum sputtering plating technique. This kind of technique can guarantee the coat of hig absobant. The gap between two pipes of high degree vacuum space can keep water of high temperature well.