Sustainable Technologies
Ask questions and provide feedback
Updraft Tower (Solar Chimney)
Updraft Tower (Solar Chimney)
Combines the chimney/stack effect and greenhouse effect with wind turbines located at the base of a very tall tower. The tower is surrounded by a large greenhouse which serves to create superheated air at the ground level. With a sufficiently tall chimney structure, the air temperature at the top of the tower will be cool enough so as to provide a strong convection movement of air from the greenhouse area, into the bottom of the chimney and out of the top of the chimney (warmer air is higher pressure and moves to the lower pressure system at the top of the tower). At the outside perimeter of the greenhouse, new surface air is constantly taken into the system to be heated. As air passes from the greenhouse area into the base of the tower, it powers wind turbines located there.