Cooling Tower, Hartsville Nuclear Power Plant
The concept of a cooling tower is to reject heat by cooling water in an evaporative manner. The heat from the water transferred to the air raises the temperature of the air and increases the humidity and that air is released into the atmosphere.
Cooling towers are very effective at the disposal of heat, more so than dry devices, as water can cool much faster than other methods. This natural draft cooling tower relied on the buoyancy of the heated air to provide the draft up the tower and was incredibly efficient as it cooled water by the thousands of gallons.