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air conditioning and global warming

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Dimitris Tzortzakakis

Aug 2, 2023, 6:29:03 AM8/2/23
as everyone knows, it's pleasant to sit in an air conditioned room in
all this heat. but a/cs do come with a penalty. according to the second
law of thermodynamics, as much heat as they extract from the air
conditioned room, the same heat they excrete to the environment, plus
the heat emitted from the compressor, and of course all the chain losses
the electricity needs to go from the generator to your plug. and as with
each heat wave more and more a/cs are added, adding their thermal loads
to the environment, each heat wave is worse than the previous one.
according to an article I read in , in french of course.
and as quaint as it might sound, a fan consumes 20 to 40 times less
electricity than an a/c!

Aug 4, 2023, 2:30:33 AM8/4/23
You must live somewhere that doesn't get hot. A fan blowing 90 degree
air (30c) on you at 85% RH is not that refreshing and it is typically
hotter inside than outside unless you also have a big fan ventilating
the attic. I have 2 24" exhaust fans and running them is not as much
cheaper as you would expect. (1/4 HP each on high, 1/8th on low)
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