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Optimizing Evaporative Cooling via Sweat in Dry Desert?
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[QUOTE="shane2, post: 5841506, member: 560071"] Assume a nearly full length thin robe open at top and bottom and largely, somehow, held off a couple inches away from bare naked skin underneath to maximize unrestricted vertical airflow. Assume desert 120F hot and very dry air can enter/exit at either bottom around ankles or at top around open neck. When sweat evaporates or vaporizes off skin, cooling the skin there, that resultant vapor exits and more 120F dry air is drawn into replace it. Is that sweat created moist vaporized air likely to be warmer or cooler than the outside 120F dry desert air? Which way does it want to naturally flow, up or down? If vapor is cooler than 120F, would it be preferable then to not move it out too overly fast, which would only draw in even more 120F against skin even faster, adding even more heat load to skin? I understand additional evaporation requires more dry air replacing that moist vapor, but am trying to optimize just how fast/slow you'd want to do so. Just fast enough that all sweat presented gets fully evaporated before dripping away to ground, but not so fast that skin gets excessive 120F desert air blast that adds even more heat to skin even quicker, is my thinking here. Am I missing anything so far? Next, if any sweat does get onto inside of garment, would it be more efficient for micro-environment there, in cooling skin, if it was impermeable to where when garment sweat evaporated that cooling process (and vapor) was contained onto the inside? Finally, if from above impermeable garment we could expect the air temp inside garment to be cooler than outside 120F air, would there then not be additional benefit maintaining that cooler micro-environment temp if garment was also insulated against conductive heat gain, too? Thank you for any thoughts. [/QUOTE]
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Optimizing Evaporative Cooling via Sweat in Dry Desert?
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