solar vacuum tube

gtc T series solar vacuum tube has 47/1500,58/1800 and other demission,our M series glass tube is for any solar water heater
gtc T series solar glass has 47/1500,58/1800 and other demission,our M series glass tube is for high pressure solar collector,more infomation see our web at www gtc-solar com,and some technical data

Tube specifiaction


Strucure
All-glass concetric dual tube geometr


Glass material
Borosilicate glass
Out tube dia meter and length
φ=47 ±0.8mm =1500mm ±20mm
φ=58 ±0.8mm =1800mm±20mm
inner tube dia meter and length
φ=37 ±0.8mm =1500mm ±20mm
φ=47 ±0.8mm =1800mm ±20mm


AI-N/Al
Gtaded Al-N/Al solar selectuve absorbing coating
Construction

Mothod to deposition
DC reactive sputtering
Absorbing
Coating
propetities
Absorbance
91%
Emittance
8%(80)
(VACUUM
P5×10
-3 pa


Stagnation parametter
≥230M²
/KW
solar radiance exposure for obtaining a preset water tempreture
≤2.8MJ/M
2
Average heat loss coefficient

≤0.8W/(M
3)
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