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Structure
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All-glass double-tube co-axial structure
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Glass material
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High borosilicate 3.3 glass
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External pipe diameter and thickness
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dia.=47±0.7mm ＆=1.6mm
dia.=58±0.7mm ＆=1.6mm
dia.=70±0.7mm ＆=0.2mm
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Internal pipe diameter and thickness
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dia.=37±0.7mm ＆=1.6mm
dia.=47±0.7mm ＆=1.6mm
dia.=58±0.7mm ＆=1.6mm
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Pipe length
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1500 1600 1700 1800 1900 2000 2100mm
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Absorptive coating property
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Structure
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Cu/ss-aln(h)/ss-aln(L)/aln
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Sediment method
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3 target magnerton sputtering plating
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Specific absorption
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as=0.90~0.93(AM1.5)
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Emission ratio
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0.05~0.075 (80℃±5℃)
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Vacuum tightness
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P≤5.0×10-³Pa
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Idle sunning property parameters
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Y=260～300㎡℃/KW
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Solar irradiation for obtaining a preset water temperature
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H≤4.7MJ/㎡
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H=3.7~4.2MJ/㎡
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H≤3.7MJ/㎡
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H=2.9~3.2MJ/㎡
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Average heat loss coefficient
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Ult=0.4~0.6W/(㎡℃)
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