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.
Depends what you are finding most uncomfortable. Water cooling could be an option, had thought of making a water cooled blanket to stick on my bed as I was finding the bed its self getting uncomfortably warm where I was laying on it.
Use a heat pump to cool down the water could also increase how much it cools you down, but then its just AC directed at your body instead of the room. Far less energy used though.
Fascinating idea. I bet that’d be a hit with the weighted blanket crowd
@HerbGrower pc
I have used a cold water bottle in bed a couple of times lately. Fairly successful.
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.
@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.
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.