YOUNN High borosilicate 3.3 glass vacuum tube solar energy collector
1.Anti-freezing, low temp use
2.ISO9001.CE,CCC certified
3.3years guarante,15years lifetime
4.Delivery within 15 days
2.ISO9001.CE,CCC certified
3.3years guarante,15years lifetime
4.Delivery within 15 days
Specification:
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Models
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Classic vacuum tube
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Triple vacuum tube
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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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Outer tube diameter and thickness
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47±0.7mm/58±0.7mm
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Inner tube diameter and thickness
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37±0.7mm/47±0.7mm
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Tubes length
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1500±4mm/1800±4mm
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Material of coating
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AL/N/AL
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Al N/Al N-SS/Cu
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Absorptance
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0.90~0.94
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0.94~0.96
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Vacuum
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P≤2×10-3pa
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P≤2×10-3pa
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Transmittance of Outer Tube
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0.93
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0.93
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Stagnation temperature (height)
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250~270°C
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270~300°C
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Heat-loss coefficient
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≤0.6w/ m2*°C)
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≤0.3w/ m2*°C)
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Bearing hailstone ability
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hailstone diameter25mm
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hailstone diameter25mm
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Pressure-endure ability
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1MPa
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1MPa
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Life span
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15 years
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15 years
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