Vacuum tube：All-glass evacuated solar collector tubesHigh heat-collecting effciency:The vacuum magnetic- controlled sputtered aluminum nitrogenaluminum selective absorption coating has a solar absorptance0.93,a heat emittance 6%,a low heat loss,and ..See more

The heat conduction through the pipe is by the way of exchage of liquid and gas.The temperature difference is very low.Because of its high heat conduction feature and efficency,the pipe is used popularly in solar industry.1.High heat conduction coeff..See more