vacuum tube

vacuum tube 1.Ultra-low heat loss 2.USD19.00/PC 3.T/T or LC

China Hitek Solar Co., Ltd. 

Vacuum tube

Features

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

2. High heat efficiency

3. The direct flow ipe 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
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

vacuum tube