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Solar Vacuum Tube

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Normal solar vacuum tube

Normal solar vacuum tube ：Its membrane layer at bottom is typically made of aluminum. Absorption layer and antireflective layer is compound of Nitrogen and aluminums ion.， which bears high thermal con

Normal solar vacuum tube
Normal solar vacuum tube
    1. Detailed information
    Normal solar vacuum tube ：Its membrane layer at bottom is typically made of aluminum. Absorption layer and antireflective layer is compound of Nitrogen and aluminums ion.， which bears high thermal conductivity . And the membranous layer is about 0.3 micron.
    Normal solar vacuum tube is very popular among solar tubes because it not only owns the mature production process, but also has the competitive prices.
    Specification：
    Structure All-Glass Double Tube Co-Axial Structure
    Glass Material High Borosilicate 3.3 Glass
    External Pipe Diameter & Thickness
    dia.=47±0..5mm  &=1.6mm,    dia.=58±0.5mm  &=1.6mm,
    dia.=70±0.5mm  &=2.0mm,  
     
    Internal Pipe
    Diameter & Thickness
    dia.=37±0.5mm  &=1.6mm,    dia.=47±0.5mm  &=1.6mm, dia.=58±0.5mm  &=1.6mm,
    Pipe Length
    		 1500mm, 1600mm, 1700mm, 1800mm, 1900mm, 2000mm，2100mm
    Absorptive Coating Property Structure Cu/SS-ALN(H)/SS-ALN(L)/ALN
    Sediment Method Three Layer Magnetron Sputtering Plating
    Specific Absorption as=0.92~0.96(AM1.5)
    Emission Ratio 0.01~0.03(80°C±5°C)
    Vacuum P≤2.0×10-3Pa
    Idle Sunning Property 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)
    Pressure-Endure Ability 0.6Mpa
    Hail-Endure Ability 30mm
    Lifetime 15years

     

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