Why the temperature of air depends on its flow?

Question

When the air is flown at the comfort temperature (22 degrees) it gets cold, but when flown in a bathhouse it gets hot. What is the point? Which science could explain this phenomenon - chemistry or physics?

Answer 1

The perceived temperature of air on your skin depends on a number of things. The rate of flow of that air, and its humidity are two of them.

When air flows over your skin, it picks up moisture from your skin. This is done through the process of evaporation. As moisture (water) evaporates, it draws heat, and when that heat is drawn from the surface of your skin your skin feel as if it is being cooled.

That is why you sweat when you feel hot. By putting on a layer of moisture on your skin, your body is trying to get your body to cool down by getting the sweat to evaporate and draw heat from the skin.

The air's ability to carry moisture depends on how much moisture there is already in the air (its humidity), its temperature and its velocity (speed). Generally, the dryer (less humid) the air, the better it is at picking up moisture, the warmer the air, the better it is at picking up moisture, and the faster the flow of air, the better it is at picking up moisture. That is why clothes hanging on the washing line on a cool or humid day don't dry as fast as they do on a hot or dry day.

So in a normal room, chances are you feel cool when you have a desk fan blowing on your skin because the air is generally dry enough and reasonably warm enough to draw moisture and heat from your skin. In a bath house, with all the steam, it is very humid and the air cannot carry much more moisture than it already does, your sweat doesn't evaporate as easily and heat doesn't get drawn from your skin.

Answer 2

it's because the air is circulated due to the current flow of air. It gets hot in the bathhouse because there is no air flow and is standing still. This phenomenon is explained through the science of physics.