Gold Member Since 2009
Audited Supplier
Changzhou Snug Solar Energy Co., Ltd.

Solar Energy, Water Heater, Solar Water manufacturer / supplier in China, offering etc Three Target Vacuum Tube, Aluminium Heat Pipe Solar Collector, Solar Keymark, Residential Solar Water Heater 50-360 Liters and so on.

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Supplier Homepage Product Vacuum tube etc Three Target Vacuum Tube

etc Three Target Vacuum Tube

FOB Price: US $2.1 / Piece
Min. Order: 1 Piece
Min. Order FOB Price
1 Piece US $2.1/ Piece
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Production Capacity: China
Transport Package: Woodencase/ Cartons
Payment Terms: L/C, T/T, D/P, Paypal, Money Gram, Western Union

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Basic Info
  • Model NO.: 47/1500 58/1800
  • Pipe Material: Glass
  • Thickness: 1.6mm/2.0mm
  • Trademark: SNUG SOLAR / OEM
  • Origin: Changzhou, China
  • Application: Water Heater, Solar Thermal, Air Conditioning System
  • Length: 1500/1800/2000mm
  • Coating: Al-N-Al/Al-Cu-Ss
  • Specification: CE; Solar Keymark
  • HS Code: 84191900
Product Description

Evacuated tubes are the absorber of the solar water heater. They absorb solar energy converting it into heat for use in water heating. Each evacuated tube consists of two glass tubes made from extremely strong borosilicate glass.

The inner tube is coated with a special selective coating (Al-N/Al) which features excellent solar radiation absorption and minimal reflection properties. The top of the two tubes are fused together and the air contained in the space between the two layers of glass is pumped out while exposing the tube to high temperatures.

This "evacuation" of the gasses forms a vacuum, which is an important factor in the performance of the evacuated tubes. The vacuum in the evacuated glass tube is less than 5×10-3pa This can only be reached and maintained over a long period of time through a specialised evacuation process in production resulting in an almost total elimination of convection and conduction losses from the tube.

etc Three Target Vacuum Tube
etc Three Target Vacuum Tube
etc Three Target Vacuum Tube
Length (nominal)1500mm /1800mm
Outer tube diameter58mm
Inner tube diameter47mm
Glass thickness1.6mm
Thermal expansion3.3x10-6 °C
MaterialBorosilicate Glass 3.3
Absorptive CoatingGraded Al-N/Al
Absorptance>92% (AM1.5)
Emittance<8% (80°C)
VacuumP<5x10 -3 Pa
Stagnation Temperature>200°C
Heat Loss<0.8W/ ( m 2 °C )
Maximum Strength0.8MPa

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