All Glass Evacuated Solar TubeProduct IntroductionAll Glass Evacuated Solar Tube is the key component of the Solar Collector and Solar Water Heater. l Structure of Tube Technical DataP
All Glass Evacuated Solar Tube
Product Introduction
All Glass Evacuated Solar Tube is the key component of the Solar Collector and Solar Water Heater.
l Structure of Tube
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Coating: AL: Aluminum AL-N: Aluminum Nitrogen SS: Stainless Steel CU: Copper
Specification：
Our Standard Product：58/1800/1.6mm; 58/1800/2.0mm; 58/2100/1.6mm; 58/2100/2.0mm; others specifications we could customize for you.
Technical data
Physical Performance | One Target | Three Target |
Absorptance of Selective Coating | α≥92.5% | α≥93.5% |
Emission of Selective Coating | ε≤7.5% | ε≤6.5% |
Stagnation Parameter | Y≥270 ㎡℃/kW | Y≥300 ㎡℃/kW |
Solar Radiance Exposure | H≤3.3MJ/㎡ | H≤3.0MJ/㎡ |
Coefficient of Average Heat Loss | ULT≤0.75W/(㎡•℃) | ULT≤0.65W/(㎡•℃) |
Selective Coating Type | AL-N/AL | SS/AL-N/CU |
Evacuated Rate | P≤3.0×10-3Pa | |
Solar Transmission Rate | τ≥0.89(AM1.5 ISO9806-1:1994) | |
Maximum Strength | 0.8 MPa | |
Coefficient of Thermal Expansion | 3.3×10-6/k | |
Material of Glass | Borosilicate Glass 3.3 | |
Withstanding Hailstone | 30 mm | |
