three target solar vacuum tube

three target solar vacuum tube
1.high quality&competition price
2.3years warranty
3.CE and CCC certificated
three target
S
olar Vacuum Tube
Structure
All-glass double-tube co-axial structure
Glass material
High borosilicate 3.3 glass
External pipe diameter and thickness
dia.=47mm &=1.6mm dia.=58mm &=1.6mm
dia.=70mm &=2.0mm
Internal pipe diameter and thickness
dia.=37mm &=1.6mm dia.=47mm &=1.6mm
dia.=58mm &=1.6mm
Pipe length
1500mm 1600mm 1700mm 1800mm 1900mm 2000mm
Absorptive
Structure
Cu/SS-ALN(H)/SS-ALN(L)/ALN
coating property
Sediment method
3 target magnetron sputtering plating

Specific absorption
as=0.90~0.93(AM1.5)

Emission ratio
0.05~0.075(80°C±5°C)
Vacuum tightness
P≤5.0×10-³Pa
Idle sunning property parameters
Y= 260 ~ 300m²°C/KW
Solar irradiation for obtaining a preset water temperature
H≤4.7 MJ/ m²(dia.58)
H=3.7~4.2 MJ/ m²
H≤3.7 MJ/ m²(dia.47)
H=2.9~3.2 MJ/ m²
Average heat loss coefficient
Ult=0.4~0.6W/( m².°C)