What is the term for the difference between the entering air wet-bulb temperature and the water leaving the tower?

The term that describes the difference between the entering air wet-bulb temperature and the water leaving the tower is known as "Approach." This measurement is critical in the cooling tower design and function, as it indicates how effectively the cooling tower is functioning in terms of cooling the water.

A smaller approach value typically signifies that the cooling tower is performing well. It reflects the effectiveness of energy transfer between the air and the water within the cooling tower. This approach is a key factor when assessing the efficiency of a cooling system and optimizing its performance for industrial applications. Understanding this difference is crucial for professionals managing commercial air systems, as it directly influences energy consumption and operational effectiveness in cooling processes.