SS-ALN-CU Direct Flow Tube For Solar Collector

1.Perfect reliability 2.Long services-life, over 20 years 3.5-second start-up 4.Easy installation 5.High heat efficiency

China Hitek Solar Co., Ltd.

Features:

1. This is Full Vacuum Tube with Direct Flow Pipe.

2. High heat efficiency, 15% higher efficiency than normal vacuum tube.

3. The direct flow pipe is made up by two concentric single-wall-tubes.

4. Cold water follows through the inner tube from upside down and flows out to the collector from the bottom through the space between the inner & outer tube, taking the heat made by the absorber.

5. It could be installed at any angle, even horizontally, while normally heat pipe tube should be installed at 30°-90°

Details:

Technical Data:

Type	DF 70/1700	DF 70/1900
Specification	Direct flow vacuum tube
Configuration
Absorber area	0.095m²	0.104 m²
Weight	2.29kg	2.55kg
Installation tilt angel	0° – 90°
Dimension	Ø70mm x1700mm	Ø70mm x1790mm
Heat pipe	Inner copper pipe: Ø 8mmOuter copper pipe: Ø 15mm
Absorber material	Copper or Aluminum;Thickness: 0.6 mm
Selective coating	SS-AlN-Cu  ;Absorptance: a > 0.96;Emittance: ε < 0.05
Glass tube	material :Borosilicate glassThickness: 2 mmTransmittance of glass: 91%
Vacuum	< 10-8 bar
Min. ambient tem.	-50°C
Stagnation temp.	300°C
Resistance to hail	Ø35mm

SS-ALN-CU Direct Flow Tube For Solar Collector