Timeline for Can a fan cause a liquid to cool below room temperature?
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 1, 2020 at 13:14 | comment | added | Pere | Furthermore, the càntir or botijo en.wikipedia.org/wiki/Botijo (and probably several similar devices worldwide) had been invented as evaporative cooler long before the invention of the first fans and thermometers. | |
| Jun 1, 2020 at 13:11 | comment | added | Pere | @MC2k - No model neede. We only need to check a wet bulb - dry bulb temperature chart like engineeringtoolbox.com/dry-wet-bulb-dew-point-air-d_682.html to see that a few degrees are easy to get and a few tens of degrees still possible in very dry air. | |
| Jun 1, 2020 at 10:36 | comment | added | आर्यभट्ट | if the room temprature is around 33 C ,there will be heat transfer ,so is it really pratically possible? | |
| May 31, 2020 at 23:04 | comment | added | FizzKicks | Well not directly, but I think one could use a similar model to investigate as to whether one could actually use a fan to achieve any noticeable cooling | |
| May 31, 2020 at 23:02 | comment | added | Philip Wood | MC2k Thank you for your link. Do you think it addresses the question asked here? | |
| May 31, 2020 at 22:58 | comment | added | FizzKicks | link If you take a look at this pretty generous model, and then consider the energy removed from latent heat vaporisation, and then apply some heat transfer methods, one can probably find a steady state for water with a few reasonable assumptions using the heat flux equation. It is late where I live, so I do not have the will to do so, but I would be surprised if the temp drop is more than half a degree. | |
| May 31, 2020 at 22:40 | comment | added | Philip Wood | @ MC2k (a) I don't think I'm claiming that the fan is essential. The fan was in the original question, which I was trying to answer in its own terms. (b) "It certainly does not pertain to the question of cooling a liquid below room temperature by blowing air over it with a fan." What is your "it" referring to? | |
| May 31, 2020 at 22:35 | comment | added | FizzKicks | I would argue that in this case it is not the fan that causes the cooling, but the evaporation of a separate fluid, which is indeed refrigeration, but not cooling with a fan. You have suggested using a fan to induce evaporation in a volatile liquid such as ether to remove heat, however one could simply (if they had some to hand) use an even more volatile liquid without a fan and achieve much the same result, indicating that the fan has no role in actually removing heat. It certainly does not pertain to the question of cooling a liquid below room temperature by blowing air over it with a fan. | |
| May 31, 2020 at 22:22 | history | edited | Philip Wood | CC BY-SA 4.0 |
added 34 characters in body
|
| May 31, 2020 at 22:15 | history | edited | Philip Wood | CC BY-SA 4.0 |
added 21 characters in body
|
| May 31, 2020 at 22:09 | history | answered | Philip Wood | CC BY-SA 4.0 |