heat pipe vacuum tube

1.GOOD QUALITY:15 years warranty
2.COMPETITIVE PRICE
3.OEM
Item Name
Item NO.


Solar heat pipe
58mm*1.8m


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
Internal pipe diameter and thickness
dia.=37±0.7mm &=1.6mm dia.=47±0.7mm &=1.6mm
Pipe length
1500mm/1800mm
Absorptive
coating property
Structure
Cu/SS-ALN(H)/SS-ALN(L)/ALN
Sediment method
3 target magnertron sputtering plating
Specific absorption
as=0.93~0.96(AM1.5)
Emission ratio
0.04~0.06(80°C±5°C)
Vacuum tightness
P≤5.0×10-³Pa
Idle sunning property parameters
Y= 280 ~ 300m²°C/KW
Solar irradiation for obtaining a preset water temperature
H≤4.7 MJ/ m²(dia.58)
H=4.1~4.4 MJ/ m²
H≤3.7 MJ/ m²(dia.47)
H=3.1~3.4 MJ/ m²
Average heat loss coefficient
Ult=0.3~0.5W/( m².°C)