How much water must be evaporated each hour to dissipate as much heat as a typical electric air conditioner?

Question

In regions with dry climates, evaporative coolers are used to cool air. A typical electric air conditioner is rated 1.17 x 10^4 Btu/h. How much water must be evaporated each hour to dissipate as much heat as a typical electric air conditioner?

Answer 1

Mostly you need to find a latent heat of vaporization of water in Btu/pound (L_V) Google "latent heat of vaporization of water in btu/lb" without the quotes.

The rate times one hour is just 1.17 x 10⁴ Btu (Q)

mL_V = Q or m = Q/L_v

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