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The 115F Heat Is Killing Phones in Sardinia
(www.bloomberg.com)
This is a most excellent place for technology news and articles.
When the outside temperature is almost as hot as the phone itself, air cooling doesn't do anything
Hardware components (at least the ones that produce the most heat) are built to withstand over 90C for desktop computers, for devices with bad thermals (such as phones) they tend to be designed to withstand above 100C.
Air cooling would help a lot, even for 50C weather. It's just less effective the warmer it is.
Does it? A fan isn't actually cooling anything, it's just speeding up natural thermal exchange, drawing hot air away and allowing cooler air to take its place. If there's no cooler air available, I don't see how a fan would be of any use.
I know that when my room is just a few degrees C warmer, my CPU runs hotter and the fan runs higher for longer.
Yes, it helps. The parts that are being air cooled are substantially hotter than the ambient air, almost always, do the faster you can circulate air the faster they will cool down, even if it's relatively hot outside for humans.