How Wet Bulb Temperature Affects The Evaporative Cooling Tower’s Performance?

In general, engineers intend the cooling tower with evaporative system to cool process water. It’s a primary way to cool down the process water in cooling tower. Other than this, air cooling design is also there which has been introduced due to the rising temperature of the cooling tower. The selection and performance of the cooling tower relies on water flow rate, water outlet temperature, water inlet temperature, and ambient wet bulb temperature. In this post, we will learn about wet bulb temperature and its effect on evaporative cooling towers’ performance. 

Ambient wet bulb temperature is a condition determined with the help of a device named as psychrometer. This device places a thin film of water on the thermometer bulb that is twirled in the air. After about a minute, it will show a reduced temperature. Wet bulb temperature is the low point when no additional twirling lowers the temperature. The below instance image will make you understand better-

While making the selection of a cooling tower cell, the design or highest wet bulb temperature of geographical area will encounter must be considered. Highest temperatures in wet bulb occur during the summer, when humidity and air temperatures are at peak.
Most cooling towers available in the stores are capacity rated at a “standard” temperature of wet bulb- 78°F. This means when the wet bulb temperature is 78°F, cooling tower will yield its stated capacity.
Why cooling towers lose their efficiency?
There are mainly three reasons that affect the efficiency of the cooling tower-
  • Scaling
  • Loss of air flow
  • Improper water flow
How to enhance the performance?
  • By adding tower cell capacity
  • By replacing the heat exchange surfaces with new clean fill
  • By checking the efficiency losses
  • By checking the proper air flow
  • By adjusting the water flow
In this way you can enhance the efficiency of your effective evaporative cooling towers using wet bulb temperature. For more help, kindly contact your vendor to get assistance and free consulting services regarding maintenance and repairing.  
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