The typical formula for temperature drop in evaporative cooling models

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SUMMARY

The discussion focuses on calculating the maximum evaporation for achieving the greatest temperature drop in air flow using evaporative cooling models. The key formula mentioned is the wet-bulb temperature, which is derived from the dry bulb temperature and humidity levels. Users can reference psychrometric charts to obtain these values. Additionally, Trane's freeware software is recommended for further analysis and calculations.

PREREQUISITES
  • Understanding of wet-bulb and dry-bulb temperature concepts
  • Familiarity with psychrometric charts
  • Basic knowledge of humidity's effect on temperature
  • Experience with evaporative cooling principles
NEXT STEPS
  • Research how to read and interpret psychrometric charts
  • Learn about the calculations involved in determining wet-bulb temperature
  • Explore Trane's freeware software for evaporative cooling analysis
  • Investigate the relationship between humidity and temperature drop in evaporative cooling
USEFUL FOR

This discussion is beneficial for HVAC engineers, environmental scientists, and anyone involved in designing or optimizing evaporative cooling systems.

T.Engineer
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By passing warm air through a cotton sock acting as a wick immersed in water, how can I calculate the maximum evaporation to achieve the gratest temperature drop in the air flow? What is the typical formula for temperature drop in evaporative cooling models?
 
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I'm not sure if there is an easy formula for it, but the number you are looking for is simply wet-bulb temperature. You can read it off a psych chart. It is a function of dry bulb temp and humidity.

Here's some info on the subject: http://www.srh.noaa.gov/elp/wxcalc/formulas/wetBulbTdFromRh.html
 
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thanks for your replying. Can you tell me any websites that will provide me with psych charts , wet-bulb tempreture and dry bulb tempreture and Humidity? I mean free download.
Thanks a lot.
 

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