A-SUN High Temperature Explosion Proof Vacuum Tubes for solar water heater
Item specifics
- 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
Review
Description
SOLAR 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:
| ||||||
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:
| ||||||
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.
