As a key component of the heat-pipe collector, heat-pipe plays a very important role in this solar collecting system. The heat-pipe is composed of heat-energy absorption unit and condenser unit, and is hollow with the space inside evacuated. Under the vacuum circumstance, the air pressure inside heat-pipe is very low, thus the medium can be evaporated easily when absorbing certain energy. This vapour rapidly rises to the condenser zone and transfers heat, then becomes the liquid and returns to the bottom of the heat pipe since the heat is lost. This process repeats again and again, so the solar energy is transferred continuously.

On Shentai heat-pipe collector, the condenser zone of the heat-pipe is inserted to the copper sleeves which are distributed on the water pipe averagely. After the solar energy is absorbed by the vacuum tubes, it is transferred to the heat-pipe through the aluminum fin. Heated by the energy, the medium in the heat-pipe is working and transferring the heat energy to the condenser zone. When water or other medium in the water pipe flows across the copper sleeves, they would bring the energy and be heated.

The heated water or other medium makes water in the tank hotter and hotter by walking across the coils in the tank.