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The outer glass wall acts as glazing, creating a vacuum space and protects the coating
against weather. On the inner surface of tube ends, a silver-colored getter material is
applied, which absorbs the remaining gases inside the tube hollow space. Deducting the
absorption and surface reflection of the outer wall of a tube, the overall efficiency of a
tube is over 92%.
REFLECTOR:
Reflector is silver coated reflecting panel. The reflectors can improve
solar system thermal efficiency and reinforce the frame structure.
FRAMES:
Frame is made of rustproof material. A frame may have full-length rear legs,
suitable for flat surface installation, or, shortened rear legs, suitable for sloped surface
installation. Length of rear legs could be cut to fit at site.
3. Working principle
3.1. Principle of vacuum tube
The vacuum tube is composed of inner tube, outer tube, selective absorption layer,
vacuum space, inspiratory layer. The outer wall of the inner tube is the selective
absorption layer. The space between outer tube and inner tube is the vacuum space. At
the bottom of the outer tube, there is an inspiratory layer which can be used to absorb
the remnant air.
