What is the primary function of a cooling tower in a power plant?

• A. To reject heat from condenser cooling water to the atmosphere, enabling a closed-loop cooling system.
• B. To generate electricity.
• C. To provide air cooling for turbines.
• D. To store condensate for reuse.

Answer: (A)

The main idea is that a cooling tower serves as the heat rejection device for the condenser cooling water, keeping a closed loop for the condenser circuit. In a power plant, steam from the turbine is condensed by the condenser using circulating water that absorbs the steam’s heat. That warmed water must be cooled before it can be reused, and the cooling tower accomplishes this by transferring heat to the atmosphere, mainly through evaporation, so the cooled water can return to the condenser and repeat the cycle. This setup preserves a closed cooling loop and supports efficient plant operation.

It doesn’t generate electricity, nor does it provide direct air cooling for the turbines, and it isn’t used to store condensate for reuse.