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gtc M series vacuum tube |
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| Company
Name: zhejiang GTC solar co.ltd.,
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Structure
All-glass concentric dual tube geometer
Glass material
Borosilicate glass
Outer lube diameter and thickness
Ø47±0.7mm &=1.5mm
Ø58±0.7mm &= 2.0 mm
Ø=70±0.7mm &= 2.0 mm
Inner lube diameter and thickness
Ø37±0.7mm &=1.5mm
Ø47±0.7mm &=1.6mm
Tube Length
1200(±5mm) 1500(±5mm)
1700( ±5mm)
2000( ±5mm)
Absorbing coating properties
Construction
Graded Al-N/Al solar selective absorbing coating
Method to deposition
DC reactive sputtering
Absorbance
>91%
Emittance
<8%(80°C)
Vacuum
P<5X10 -3 Pa
Stagnation parameter
= 230M 2 °C/KW
Solar radiance exposure for obtaining a preset water temperature
= 2.8MJ/M 2
Average heat loss coefficient
= 0.8W/(M 2 °C)
Lifetime
15 Yeas
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| Company Name: |
zhejiang GTC solar co.ltd., |
| Address: |
haining,zhejiang,china |
| Contact Person: |
angelwu |
| Tel: |
86-573-88131101 |
| Fax: |
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| E-mail: |
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| IP: |
125.123.225.85 (2008-3-4 11:50:22) |
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