three -target vacuum tube

three -target vacuum tube

 three -target vacuum tube

structure: all-glass double-tube co-axial structure

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: as =0.93-0.96(AM1.5)

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

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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: ULT=0.4-0.6W/(m2.oC)

three -target vacuum tube