Sell Evacuated Tube

Description

solar energy vacuum tube adopts all-glass double tube co-axial structure, made of high borosilicate 3.3 glass, super vacuum which achieves 2× The vacuum tube is similar to a conventional Dewar flask, which consists of two borosilicate glass tubes, with perfect chemical and thermal shock resistance. The outside of the inner tube that is closed at one end and sealed at the other end of the outer tube, is coated with a sputtered solar selective layer. The annular space between the outer tube and inner tube is evacuated that virtually eliminates heat loss caused by conduction and convection. Techniques & Features : 1. Excellent performance of absorbing, but low heat loss, Especially adapted to sever cold regions, (super heat preservation) successfully introduced the Advanced Solar Selective Coating, which achieves the greater thermal efficiency and better thermal stability innovatively. The solar selective coating absorbs most solar radiation as well as suppresses the thermal emittance loss from the coating. With the help of DC magnetron sputtering technology, the absorption of 0.*4 - 0.*6 and emittance of 0.*4 - 0.*6 has been achieved. The main absorbing wavelength ranges from 0.*5Î&frac*4;m to 3.0Î&frac*4;m. Excellent resistance of burst. Improved molecule structure of plated selective coating, attributed to DC magnetron sputtering technology, makes the highest of vacuum tube working temperature as high as **0℃, effectively preventing the coating from bursting, aging, discoloring, function attenuating because of long time burn under the sun, prolonging its life span to *5 years. Furthermore, the special material plated on tube coating is activated promptly once sun irradiates. The upper surface of semi-cylinder of tube heated by sunshine directly, and the under surface heated by reflected ray at the same time, have different temperatures, so the thermal force propels the water to cycle in the tube rapidly. Consequently, the water circulation in the tube which