Vacuum Tube for U-Type

The pipe is made of copper. The selective coating on the inner cover of the evacuated tube converts solar energy into heat energy and transfers heat to metal U tube by an aluminum fin. The working substance flows in the pipe instead of water (usually a glycol-water antifreeze mixture) in the metal U tube is heated, and conducts the heat energy to the water inside the storage tank through plate exchanger or internal spiral coils.