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Category: Plant Basics
Question: How much water is lost through a commercial cooling tower system with a throughput of about 600 GPM?
Keywords: cooling,tower,losses
Answer: This question depends on many factors. Sounds like the tower is fairly small. A rule of thumb suggests that the tower will see an evaporation loss of about 0.1% of the circulation flowrate for each Fahrenheit degree of cooling. Other losses include drift losses (probably very small for your tower) and blowdown. Blowdown is simply a purge of tower water to prohibit the buildup of solids.


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