4 ms·
Evaporated sweat only cools the body if it leaves the area where the body is. So presumably they would be radiating warm air away from them.
by louthy 5y ago
Evaporated sweat only cools the body if it leaves the area where the body is. So presumably they would be radiating warm air away from them.
- contravariant 5y agoNot necessarily, they might just be radiating humid air. It's the evaporation itself that leads to the cooling.
- Razengan 5y agoHey as long as I feel cool and look cool I don’t care what it does.
- gruez 5y agoBut the humid air makes it harder for people around you to cool evaporatively (eg. sweating)
- contravariant 5y agoWell yes, you must (irreversibly) increase entropy somehow. The air itself won't be warmer though.
- StrictDabbler 5y agoThis is why we have wet and dry bulb temperatures. Your intuition about temperature is focused on the dry-bulb temperature that a simple probe gives you. A wet-bulb is literally a probe with a wet cloth or tissue around it. As the humidity in the air increases the wet-bulb temperature approaches the dry bulb temperature. This is absolutely “warming”. The latent heat of the air increases. The sensible heat remains the same.
- Retric 5y agoWithout the jacket the person will emit the same heat. The jacket fans do generate a trivial amount of heat, but it’s likely less than a desktop fan.
- gmadsen 5y agoventilation is a lot cheaper than AC though