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Assuming there is a light wind, that construction is partly shaded and a constant water pouring and evaporation of the material is occurring due to the breeze.

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  • $\begingroup$ Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking. $\endgroup$
    – Community Bot
    Jun 27, 2022 at 21:41
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    $\begingroup$ Search term: “swamp cooler.” $\endgroup$
    – rob
    Jun 27, 2022 at 22:59
  • $\begingroup$ You are asking about evaporative cooling on a grand scale with the continuous flow of air past the wet cloth a very important requirement. $\endgroup$
    – Farcher
    Jun 28, 2022 at 7:29

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Yes, if the humidity of the incoming air is low. This is the "evaporative cooling" (swamp cooler) method used for air conditioning in very dry climates (e.g., Albuquerque, NM). It is not effective if the incoming air is not dry (as in Houston). See discussions on adiabatic saturation in a thermodynamics textbook, such as one by Sonntag and van Wylen.

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To effectively cool a medium-sized room via evaporation requires about 12 square feet of evaporator surface and 4 inches of thickness of water-saturated evaporation pads plus about 1/3 horsepower worth of continuous air flow that does not recirculate, and several gallons/hour of water supply. The maximum temperature depression achievable in practice this way is about 20 degrees F assuming very low ambient humidity like in the desert.

In comparison, a window-mounted single wet sheet without a fan will be ineffective.

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