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Alternative to Air-conditions? (lemmus.org)
submitted 3 months ago by to c/solarpunk@slrpnk.net
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I am completly opposed to Air-conditions propagandized as a solution to climate change. What is the wright approach to combating this state of temporary relief except from old-fashioned fans? Don't get me wrong. They do the job for me. I am reffering to finding a solution for people more with health issues or large facilities that are in need of something more drastic.

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[–] 1 point 3 months ago (3 children)

@HerbGrower pcI have used a cold water bottle in bed a couple of times lately. Fairly successful.

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  • [–] 1 point 3 months ago (2 children)

    Wouldn't cold water get warm very quickly? I have thought of ice though. If you wrapped it up enough so that it takes up heat fairly slowly.

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  • [–] 1 point 3 months ago (1 child)

    @HerbGrower Yes, that is the problem. It only lasts an hour or two at most. I used a two litre plastic milk container rather than a normal hot water bottle.

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  • [–] 1 point 3 months ago

    IIRC the latent heat of fusion of water is about 333kJ/kg. So 666kJ for 2L. With ice that averages out to about 23w over a nights sleep. Heat capacity of water is 4.2kJ/kg/k, so even if its 0c as a liquid, to warm up to body temperature is under 300kJ.

    TLDR: Water going from a ~0c solid to ~0c liquid takes more than twice as much energy as ~0c liquid water warning up to body temperature.

    The ice also only melts to 0c, so you get that benefit as well.

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