Evacuated Tube Solar Thermal Collectors
For Solar Air Conditioning Heating & Commercial Process
While evacuated tube technology clearly surpasses flat panels for nearly all water heating applications, the advantages are truly dramatic when used for solar air conditioning, heating or commercial process.
The reason there is no air in the tubes is to prevent heat loss through convection and radiation. The vacuum helps the tube to retain the heat that has been collected allowing a much greater heat gain. In addition to the vacuum, a special absorbing film is placed between the two tubes. This special film allows the tube to absorb as much as 90-92% of the sun’s ultraviolet rays.
For Solar Air Conditioning Heating & Commercial Process
While evacuated tube technology clearly surpasses flat panels for nearly all water heating applications, the advantages are truly dramatic when used for solar air conditioning, heating or commercial process.
That’s because evacuated tube heat pipe collectors can more easily attain the higher temperatures needed, they can collect and retain heat even when it is very cold outside, and due to their superior Incidence Angle Modifier they collect solar energy more evenly throughout the day resulting in a lower buffer or thermal storage requirement. There are many other advantages as well.
Evacuated tube collectors are exactly just what the name implies. They are made up of glass tubes that the air has been evacuated (withdrawn) out. Actually each tube is made up of a glass tube within a glass tube. Each tube is made of two layers of strong borosilicate glass (glass with very low iron content).The reason there is no air in the tubes is to prevent heat loss through convection and radiation. The vacuum helps the tube to retain the heat that has been collected allowing a much greater heat gain. In addition to the vacuum, a special absorbing film is placed between the two tubes. This special film allows the tube to absorb as much as 90-92% of the sun’s ultraviolet rays.