please if you can give me scientific information (or a web site) to back up your answer .
2007-06-26 09:15:11 · 5 answers · asked by shadedmark99 2 in Science & Mathematics ➔ Weather
First, the fan will help circulate air in the room so there isn't a pocket of warm air around your body from your body heat. It will also blow around any moisture from your breath and help keep it less moist and therefore more comfortable.
It will expedite the evaporation of sweat from your body which cools you down. This process keeps you cool because to evaporate your sweat takes heat from your body.
But, it seems the fan's motor might produce heat which can't be mitigated by the sweat evaporation or the air circulation.
PROOF:
http://www.newton.dep.anl.gov/askasci/phy00/phy00393.htm
http://www.sweathelp.org/English/HCP_Hyperhidrosis_Physiology.asp
2007-06-26 12:57:40 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Assuming your goal is to be cooled off, it is better to have the fan on.
Your body acts like a 98.6-degree radiator. The heat radiating from your body warms the air right next to your skin. If the air is still, that warm air stays next to your skin and makes you uncomfortable. But moving air blows away that thin layer of warm air and replaces it with cooler air. It may not be MUCH cooler, but it's cooler than the layer that was there before.
Also, the moving air helps the perspiration process, which also helps keep you cooler. When your sweat evaporates, the water vapor carries away some of your body's heat. But if the layer of air next to your skin becomes saturated with water vapor, the sweat can't evaporate. Moving air blows the vapor-saturated air away from you and replaces it with drier air.
2007-06-26 09:28:08 · answer #2 · answered by RickB 7 · 0⤊ 0⤋
If the humidity is low, the moving air provided by a fan will result in evaporative cooling.
If the humidity is high, there will be little evaporative cooling, and the heat of the fan's motor might theoretically increase your suffering by a *tad* - but you'll probably not notice it.
2007-06-26 09:22:10 · answer #3 · answered by Anonymous · 0⤊ 0⤋
It's still better to have the fan blowing on you. If you're sweating, it will evaporate in the breeze helping to keep you a little cooler.
2007-06-26 09:19:41 · answer #4 · answered by Larry M 4 · 0⤊ 0⤋
Hi. Moving air will cause more rapid evaporation of perspiration and will cool you some what. Fan on.
2007-06-26 09:20:20 · answer #5 · answered by Cirric 7 · 0⤊ 0⤋