Detailed Product Description

glass material: high borosilicate 3.3 glass

external pipe diameter and thickness: Φ=47±0.7mm £=1.6mm Φ=58±0.7mm £=1.6mm

                                               &sp;        Φ=70±0.7mm £=2.0mm

internal pipe diameter and thickness: Φ=37±0.7mm £=1.6mm  Φ=47±0.7mm £=1.6mm

                                                      Φ=58±0.7mm £=1.6mm

pipe length : 800mm 1200mm 1500mm 1600mm 1800mm 1900mm 2000mm 2100mm

absorptive coating structure :Cu/SS-ALN(H)/SS-ALN(L)/ALN selective absorbing coating

absorptive coating sediment method: three target magnertron sputtering plating

specific absorption: a_s =0.93-0.96(AM1.5)

emission ratio: ε_h=0.04-0.06(80<6(80^oC±5^o/sup>C)

vacuum tightness: P≤5.0×10^-3Pa 

idle sunning property parameters: Y=260-300m².^oC/KW

solar irradiation for obtaining a preset water temperature: H≤4.7MJ/m²(Φ58)  H=3.7-4.2MJ/m²

                                                                                  H≤3.7MJ/m²(Φ47)  H=2.9-3.2MJ/m²

average heat loss coefficient: U_LT=0.4-0.6W/(m².^oC)