Supplying Solar Three Target Vacuum Tube

Structure

All-glass double-tube co-axial structure

Glass material

High borosilicate 3.3 glass

External pipe diameter and thickness

dia.=47±0.7mm ???=1.6mm

dia.=58±0.7mm ???=1.6mm

dia.=70±0.7mm ???=0.2mm

Internal pipe diameter and thickness

dia.=37±0.7mm ???=1.6mm

dia.=47±0.7mm ???=1.6mm 

dia.=58±0.7mm ???=1.6mm

Pipe length

1500 1600 1700 1800 1900 2000 2100mm

Absorptive coating property

Structure

Cu/ss-aln(h)/ss-aln(L)/aln

Sediment method

3 target magnerton sputtering plating

Specific absorption

as=0.90~0.93(AM1.5)

Emission ratio

0.05~0.075 (80???±5???)

Vacuum tightness

P≤5.0×10-³Pa

Idle sunning property parameters

Y=260???300??????/KW

Solar irradiation for obtaining a preset water temperature

H≤4.7MJ/???

H=3.7~4.2MJ/???

H≤3.7MJ/???

H=2.9~3.2MJ/???

Average heat loss coefficient

Ult=0.4~0.6W/(??????)