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Air conditioned clothing
Air conditioned clothing is a term for clothing that actively cools down the wearer. It has primarily been used by workers in areas where air conditioning systems cannot be easily installed, such as tunnels and underground construction sites. Air-conditioned clothing on the market does not operate by actually cooling down the air, as a room AC unit does. Instead, it increases the natural body cooling of the wearer by blowing air and sometimes water vapor around the body, decreasing skin temperature by the evaporation of sweat and vapor.
Patents for air conditioned clothing have been around for years, but few products have actually made it to market. One such company that has brought air conditioned shirts to market is Octocool, which is the largest online distributor of air conditioned clothes. Attached to the clothing are two lightweight fans that help draw in air and help vaporize sweat. The fans, attached to the back of the clothing near the waist, are about 10 cm wide and run on rechargeable lithium ion batteries that last between 8.5 to 59 hours depending on the speed of the fan.
One advantage of air-conditioned clothing is that it requires much less energy to cool people down than to cool down their entire environment. For instance, an air conditioned shirt that cools the user wherever they go uses 4,400 mAh of power for 8.5 hours on the fastest fan setting, while an average central air conditioning unit uses 3000 to 5000 watts of power.〔(Conditioned Cooling Shirt Saves Energy'' )〕 In most cases, the purpose of air-conditioning is not to cool down the objects in the room, but the people. Directly cooling clothing is therefore far more efficient. A 2012 New York Times article〔(''Relief in Every Window, but Global Worry Too'' ) June 20, 2012 New York Times〕 reported that gases commonly used in air conditioning absorb some 2,100 times more infrared radiation per ton than carbon dioxide, and due partly to increasing use of air conditioning in the developing world (particularly in tropical areas like India, Malaysia, Indonesia, Brazil, and southern China), air conditioning is projected to contribute to some 27% of the overall greenhouse gas emissions by 2050. Although there are some ideas for room air conditioning units that do not significantly contribute to climate change, none of those options are yet on the market. Hence, air-conditioned clothing may provide an important alternative to those who wish to keep both themselves, and the planet, cool.
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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