Solar-Vakuumröhre

Normal all glass vacuum tube Specification:StructureAll-glass double-tube co-axial structureGlass materialHigh borosilicate 3.3 glassExternal pipe diameter and thicknessdia.=47±0.7mm &=1.6mm dia.=58±0.7mm &=1.6mmdia.=70±0.7mm &=2.0mmInternal pipe diameter and thicknessdia.=37±0.7mm &=1.6mm dia.=47±0.7mm &=1.6mmdia.=58±0.7mm &=1.6mmPipe length1500mm 1600mm 1700mm 1800mm1900mm 2000mmAbsorptive coating propertyStructureAL/AL-ALN(H)/AL-ALN(L)/ALNSediment methodSingle target magnetron sputtering platingSpecific absorptionas=0.88 0.91(AM1.5)Emission ratio0.05 0.075(80°C±5°C)Vacuum tightnessP≤5.0×10-³PaIdle sunning property parametersY= 220 260m²°C/KWSolar irradiation for obtaining a preset water temperatureH≤4.7 MJ/ m²H=4.1 4.4 MJ/ m²H≤3.7 MJ/ m²H=3.1 3.4 MJ/ m²Average heat loss coefficientUlt=0.6 0.7W/( m².°C)