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Working on a new prototype and I would need the answer to this:

What is the cheapest and easiest way to cool 2 liters of water without using ice or a fridge?

Vesa
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  • What have you tried so we don't waste our time on repeats where you say "Oh, already tried that"... – Solar Mike Sep 26 '18 at 05:57
  • How hot does it start? How cold do you need? How fast? The cheapest way to cool some hot water is to leave it alone in the air... – Jonathan R Swift Sep 26 '18 at 10:10
  • There are too many possible answers due to so little explanation and constraints. How long can it take? What do you have at your disposal? From what temperature to what other temperature? Do you have additional water that is expendable? What is the overall purpose? – Olin Lathrop Sep 26 '18 at 11:46

2 Answers2

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-Fill in a vase with clean cool silt and let the water drain through it.

  • Spill it on a cool stone slab sloping down to a container.

  • Run it through a car radiator.

kamran
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Use a "Zeer pot", commonly used for keeping wine chilled.

A ceramic pot which is soaked in water and as the water evaporates from the surface it cools the interior - only issue can be that if the ambient humidity is very high it does not work so well...

Also used in hot climates to cool rooms...

A link to one description : https://practicalaction.org/zeer-pot-fridge

Solar Mike
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  • This process of evaporative works well when the humidity is low. When I lived in Phoenix, AZ, I had a swamp cooler that lowered the temperature from maybe 110 F outside to 80 F inside. The bad news is it does not work so swell when the humidity is higher. In the late summer when the humidity was up, I had to break down and use the refrigeration a/c. – user1683793 Sep 26 '18 at 15:03
  • @user1683793 I mentioned that in my answer about the issue of humidity being high... – Solar Mike Sep 26 '18 at 15:08