Solar vacuum tube
The main core for collecting solar energy to heat the water.
Tube structure: All-glass double deck co-axial structure
Glass material: High borosilicate 3.3 glass
Outer tube diameter and glass thickness:
Ø 47± 0.7mm; Glass thickness 1.6± 0.15mm
Ø 70± 0.7mm; Glass thickness 2.0± 0.15mm
Ø 58± 0.7mm; Glass thickness 1.6± 0.15mm
Inner tube diameter and glass thickness:
Ø 37± 0.7mm; Glass thickness 1.6± 0.15mm
Ø 47± 0.7mm; Glass thickness 1.6± 0.15mm
Ø 58± 0.7mm; Glass thickness 1.6± 0.15mm
Tube length:
800mm, 1200mm, 1500mm, 1600mm, 1800mm, 1900mm, 2000mm, 2100mm etc
Absorption:
Coating material: CU/SS-ALN(H)/SS-ALN(L)/ALN
Sediment method: Three Target magnetron sputtering plating
Absorptivity: Absorptivity: α =0.92~0.96 (AM1.5)
Emission: ξ =0.04~0.06(80º C± 5º C)
Vacuum degree: P≤ 5.0X10-3(PA)
Stagnation temperature (temperature inside of empty evacuated tubes): 260~300 º C
Average heat loss: ULT 0.4~0.6 W/(m2 *º C)
Hail resistance: Ø 25 mm
Pressure-endure: 1MPa
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