Three target solar vacuum tube
1. three target coating film
2.high temperature
3.super compressive capability
1. three target coating film
2.high temperature
3.super compressive capability
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Strucure(three target vacuum tube)
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All-glass concentric dual tube geomer
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Glass material
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Borosilicate glass
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Outer tube diameter and thickness
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Φ=47±0.7mm & =1.5mm
Φ=58±0.7mm & =2mm Φ=70±0.7mm & =2mm |
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Inter tube diameter and thickness
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Φ=37±0.7mm & =1.5mm
Φ=47±0.7mm & =1.6mm Φ=58±0.7mm & =1.6mm |
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Tube Length
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1200(±5mm)1500(±5mm)
1700-1800(±5mm) 2000(±5mm) |
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Absorbing
coating properties |
Configulation
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1200(±5mm) 1500(±5mm)
1700-1800(±5mm) 2000( ±5mm) |
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Mothod to deposition
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AL-N/A1 selective absorptive coating
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absorptance
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as 0.88-0.93
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Emittance
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Σn:-.08-0.04
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Vacuum
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p ≤ 2 × 10-3
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Stagnation parameter
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250M2C/KW
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Sloar rediance exposure for obtaining a preset water temperature
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2.8MJ/M2
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Average heat loss coefficient
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0.8W(M2C)
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Lifetime
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15years
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