vacuum tube solar energy system
Product Description
Evacuated Glass Solar Tubes (EGT) are the key components of new generation solar water heaters, Solar Water Heating Systems. The evacuated glass solar tubes, having the best possible insulation---vacuum jacket, which allow sunlight to pass through freely but stop thoroughly the thermal heat transfer, are featuring high efficiency, low heat loss and longer life time. The use of evacuated glass solar tube technology appears to be one significant progress in solar industry all over the world. Now Evacuated Glass Solar Tube Solar Systems are becoming more and more popular in China, India, Pakistan, Mexico, Singapore, Malaysia, Indonesia, Romania, New Zealand, Germany, Canada etc.Each evacuated tube consists of two glass tubes made from extremely strong borosilicate glass. The outer tube is transparent allowing light rays to pass through with minimal reflection. 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
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