U-pipe solar collector (SU-58/1800-12)

The vacuum tubes absorb the solar energy and transfer into the heat energy, then pass it into the U pipe, it can get high temperature.There is no water in the vacuum tube, so the tube will not break in the winter. It is steady and credible. It can be combined with the architecture prefectly. It can be combined with existing pipeline. It can still operate in the event of occasional tube breakages.