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A-SUN High Temperature Explosion Proof Vacuum Tubes for solar water heater
Categories Solar Vacuum Tubes Brand A-sun & Xianke Warranty time 3 Deliver Time 5-15 working days Brand A-sun,OEM &ODM are acceptable Life time 15 years Material 3.3 high borosilicate glass Trade Term FOB,CNF &CIF Absorptive 0.93~0.96 Type Vacuum Solar Collector Emission 0.04~0.06 Application Solar Thermal, water heater FOB port Shanghai ,Ningbo Terms of Payment L/C, Western Union, T/T Update Time 2021-09-25 Detail InformationSOLAR VACUUM TUBES
The Standard
Physical & Chemical Performance
Expansion Coefficient: 3.3 x 10-6 / K
Density(g/CM^3): 2.23 ± 0.02
Water Resistance: First Class
Acid Resistance: First Class
Alkali-resistance: Second Class
Softening Point: 820°C
Temperature Of Divitrification: 695°C to 1180°C
Technical Data
Melting Temperature: 1680°C
Forming Temperature: 1260°C
Softening Point: 830°C
Annealing Point: 560°C
Hardness: 7
Single Target Tube:
Length: 1800mm± 2mm
Number of Tubes: 20
Outer tube diameter: 58mm±2mm
Inner tube diameter: 47±2mm
Glass Thickness: 1.6mm± 2mm
Structure: All glass double tube co-axial structure
Glass Material: High borosilicate 3.3 Glass
Absorptive Coating: Graded A1-N/A1 (copper coating)
Coating Property:
Sediment Method
Single Target Magnertron Sputtering plating
Specific Absorption
>92% (AM 1.5)
Emission Ratio
<8% (80°C)
Vacuum: P<0.005Pa
Stagnation Temperature: ≥200°C
Idle Sunning Property Parameters: Y=250 ~ 280m^2 . °C /KW
Hailstone bearing ability: Hail Stone with a diameter of ø 25mm
Solar Irradiation for obtaining a present water Temperature:
H≤4.7MJ/M^2 (ø58)
H=4.1~4.4 MJ/M^2
H≤3.7MJ/M^2 (ø47)
H=3.1~3.4 MJ/M^2
Average Heat Loss Coefficient: < 0.8W/㎡°C
Efficiency: 93%-95%
THE INNER TUBE IS MADE WITH ANTI SCALLING PROVISION
Product Advantages
1) Excellent material: High borosilicate glass 3.3 is adopted as the raw material.
2) High thermal efficiency: Pure vacuum layer without impurity. Degree of vacuum is high and lasts long, possessing extremely high absorption to sunlight with extremely low thermal emissivity.
3) Small thermal losses: Higher degree of vacuum is kept between vacuum heat collection pipes, reducing thermal losses caused by heat conduction and heat convection to the maximum.
4) Long life: Performance of film plated layer is stable, being not easy to ageing and attenuation. Processes in links of material selecting, production, transportation and quality inspection, etc. are strict with longer service life.
5).Corrosion resistant: Performance against chemical corrosion is extremely good, appropriate to various kinds of water quality.
6).High degree cold resistant: Even in high latitude in Northeastern China area with high degree cold temperature bitter cold, hot water can still be used normally, displaying super high heat collection rate.
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