Question

Whydoes the desert cooler cool better on a hot, dry day?

Answer 1

The rate of evaporation increases with increase in temperature and decrease in humidity.

During a hot, dry day, the hot air passing through the desert cooler makes the water present in it to evaporate faster than a normal day by taking the latent heat of vaporisation from the hot air. This cools the air passing through the desert cooler and cool air comes out of the cooler.

So the desert cooler cools better on a hot dry day.

Answer 2

Why does a desert cooler cool better than hot dry day?

• On hot dry day temperature is high & humidity is less which helps in better evaporation.
• Due to the higher rate of evaporation it gives better cooling effect.