All-glass evacuated solar collector tubes

High heat-collecting effciency: The vacuum magnetic- controlled sputtered aluminum nitrogenaluminum selective absorption coating has a solar absorptance≥ 0.93, a heat emittance≤ 6%, a low heat loss, and a good thermal-retention effect.

Good weather-resistance: It has a good all-year thermal efficiency and is able to withstand the front impact by the hail of a diameter below 25mm and a pressure 0.6MPa.

Long service life: Ensures a service life of 15 years for the evacuated tube.