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November 7, 2017 1:19 pm at 1:19 pm
#1397629
Avram in MD
Participant
DaasYochid,
Now answer this: why does a fan make us feel cooler if it’s the same temperature air circulating?
1. Evaporation is a cooling process (changing water from liquid to vapor takes heat energy), so our sweat is designed to help cool us off. Moving the air over the sweat increases the rate of evaporation.
2. The moving air generates forced convection that transfers heat away from our bodies.