Vacuum Tube Solar Water Heater

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 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