0-solar vacuum tube 58*1800mm/three target coating red tube/etc solar tube

solar vacuum tube-three target
1,high quality , good price
2.ISO9001:2000. CE
3,lifetime 15years
4.USD1.35-5.85/pc
JIACHEN&SUNSHINE

solar vacuum tube-three target
1,high quality , good price
2.ISO9001:2000. CE
3,lifetime 15years
4.USD1.35-5.85/pc

Solar Vacuum Tube
--------offer OEM service/
15 years' lifetime


solar vacuum tube feature:
1. Unique three-layer absorption technology
2. Unique Three-Layer(stainless steel/red copper/aluminum), allowing high temperature endurance and preventing peeling off even when the glass gets waxy degeneration
3. Unique Three-layer against degeneration, color feding or performance degeneration due to exposure the empty vacuum tube under the sun over time, extending the life of the product.
4. Incorporating three layer interference coating technology.
5. Unique super pure copper surface, allowing lower reflection and minimal heat loss.
6. Ideal heat collection efficiency in



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 &=2.0mm
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
1500mm 1600mm 1700mm 1800mm1900mm 2000mm
Absorptive
coating property
Structure
Cu/SS-ALN(H)/SS-ALN(L)/ALN
Sediment method
3 target magnetron sputtering plating
Specific absorption
as=0.93~0.96(AM1.5)
Emission ratio
0.04~0.06(80±5)
Vacuum tightness
P≤5.0×10-³Pa
Idle sunning property parameters
Y= 260 ~ 300m²/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.)