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Structure |
All-glass double-tube co-axial structure |
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Glass material |
High borosilicate 3.3 glass |
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External pipe diameter and thickness |
Φ=47±0.7mm &=1.6mm Φ=58±0.7mm &=1.6mm
Φ=70±0.7mm &=2.0mm |
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Internal pipe diameter and thickness |
Φ=37±0.7mm &=1.6mm Φ=47±0.7mm &=1.6mm
Φ=58±0.7mm &=1.6mm |
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Pipe length |
800mm 1200mm 1500mm 1600mm
1800mm 1900mm 2000mm 2100mm |
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Absorbing coating property |
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Structure |
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Sediment method |
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Spectific absorption |
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Emission ratio |
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AL/AL-ALN(H)/AL-ALN(L)/ALN
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Single target magnertron sputtering plating |
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as=0.90~0.93(AM1.5)
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εh=0.05~0.075(80℃±5℃) |
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Vacuum tightness |
P≤5.0X10-3Pa |
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Idle sunning property parameters |
Y=220~260m2.℃/KW |
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Solar irradiation for obtaining a preset water temperature |
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H≤4.7MJ/m2(Φ58) |
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H≤3.7MJ/m2(Φ47) |
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H=4.1~4.4MJ/m2
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H=3.1~3.4MJ/m2 |
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Average heat loss coefficient |
ULT=0.6~0.7W/(m2.℃) |
