Working Principle of U Pipe Series:

Vacuum tubes absorb sun`s energy and transfers into heat energy, then pass it to U-pipe, It can get high temperature.
U-pipe have good perfromance of bearing pressure, There is no water in the vacuum tube, so the tube will never get break in any season. It is steady and credible. It can be combined with the architecture prefectly. The installation is flexible and can work under any installation angle. It can still work in the even of occasional tube breakage.