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Cooling using earthen pots.

Question asked by zaveri in #Coffee Room on Dec 6, 2013
zaveri
zaveri · Dec 6, 2013
Rank A3 - PRO
We all know that drinking water can be naturally cooled, if stored in earthen pots. This is because the pots being porous in nature, allows the passing air to penetrate through it, and cool the water, contained in it.

Now consider that if a fast rotating table fan, is placed beside such a pot, filled with water, and is blowing all its breeze on the pot, then will the rate of cooling of water increase ? or will it cause the water to evaporate ? what exactly will happen ? Posted in: #Coffee Room
Sarathkumar Chandrasekaran
Rank A2 - PRO
I don't think it affect evaporation to a great extent and placing a fan would increase the cooling of pot water
Ramani Aswath
Ramani Aswath · Dec 8, 2013
Rank A1 - PRO
zaveri
We all know that drinking water can be naturally cooled, if stored in earthen pots. This is because the pots being porous in nature, allows the passing air to penetrate through it, and cool the water, contained in it.

Now consider that if a fast rotating table fan, is placed beside such a pot, filled with water, and is blowing all its breeze on the pot, then will the rate of cooling of water increase ? or will it cause the water to evaporate ? what exactly will happen ?
It is the reverse process actually.The pot being porous allows the water to 'sweat' out of the pot. If the surrounding air humidity is less than 100%, the water evaporates.The latent heat of vaporization has to come from the pot of water which cools.

The principle is identical to the working of room coolers.
https://en.wikipedia.org/wiki/Evaporative_cooler
Yes, keeping a fan blowing on the pot will cool it faster. However, the final temperature will be decided by the RH% and so the fan will not cool it to a lower temperature.

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