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solar vacuum tube
Three target glass solar vacuum tube
This type of solar vacuum tube adopts a hi-tech spatting with 12layers of solar absorptive coating Cu/SS-ALN(H)/SS-ALN(L)/ALN,which presents the vacuum tube with a much higher absorptance and lower emission ratio.In addition ,three target vacuum tube is specially excellent in heat resistance ,without any problem when its temperature risen up to 380 °C against idle sunning ,much more stable.performance and longer lifespan.
Specification of three target all glass solar vacuum tube :
| solar Vacuum Tube Structure | All-glass double-tube co-axial structure | |||||
| Glass Material | High borosilicate 3.3 glass | |||||
| External Tube Diameter & Thickness | Φ=47±0.7mm &=1.6mm, Φ=58±0.7mm &=1.6mm, Φ=70±0.7mm &=2.0mm | |||||
| Internal Tube Diameter & 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 | |||||
| Absorbing Coating | 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 | εh=0.04~0.06(80±5) | |||||
| Vacuum Tightness | P≤5.0X10-3Pa | |||||
| Idle Insolation Property | Y=260~300m2./KW | |||||
| Solar Irradiation | H=3.74~4.2MJ/m2 | |||||
| H=2.9~3.2MJ/m2 | ||||||
| Average Heat Loss Coefficient | ULT=0.4~0.6W/(m2.) | |||||
Solar vacuum tube is a solar heating core parts absorbing solar energy and converts solar irradiation into heating energy. Solar vacuum tube is widely used for solar water heater and solar collector whcih with low pressure. Solar vacuum tube usually completes with heat pipe ,aluminum fin to be heat pipe evacuated tube and also can completes with U pipe and aluminum fin as U piipe solar vacuum tube to be U pipe solar vacuum tube .And they are used for solar collector and solar water heater with high pressure working.
