A cooling tower cools air from a high temperature so it can be circulated into the plant or other places where the temperature is lower. An evaporator can only do the reverse – it takes warm air from a high temperature and changes it to cool air. The differences between the two are not very significant, and both are needed to keep nuclear power plants running efficiently.
The two cooling towers that are most often confused with each other are the geothermal and the evaporative cooling towers. A geothermal tower takes the heat from the ground and moves it to the surface. A geothermal tower only has one pipe in it; however, the pipes are buried deep into the ground under a lot of pressure so they will not crack. This pressure makes them very efficient and effective at cooling large areas of land. Evaporative cooling towers use a different method. Instead of taking the heat from the earth's surface, they take the heat from the environment and pump it into the tower.
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