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Strucure All-glass concentric dual tube geomer.
Glass material Borosilicate glass.
Outer tube diameter and thickness
Φ =47± 0.7mm & =1.5mm.
Φ =58± 0.7mm & =2mm.
Φ =70± 0.7mm & =2mm.

Inter tube diameter and thickness
Φ =37± 0.7mm & =1.5mm.
Φ =47± 0.7mm & =1.6mm.
Φ =58± 0.7mm & =1.6mm.
Tube Length
1200(± 5mm)
1500(± 5mm).
1700-1800(± 5mm).
2000(± 5mm).

Properties Configulation
1200(± 5mm)
1500(± 5mm).
1700-1800(± 5mm).
2000( ± 5mm).
Mothod to deposition AL-N/A1 selective absorptive coating.
Absorptance as 0.88-0.93.
Emittance Σ N: -. 08-0.04.
Vacuum p? 2 × 10-3 PA.
Stagnation parameter above 250M2C/KW.
Solar rediance exposure for obtaining a preset water temperature 2.8MJ/M 2.
Average heat loss coefficient 0.8W(M2C).
Lifetime 15years.