Latent Heat Evaporative Cooling

Cooling effect from evaporation rate and h_fg.

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Formula and source

Indirect-evaporative supply temperature ≈ T_db − ε × (T_db − T_wb). Latent heat of vaporization for water = 970.3 BTU/lb at 212 °F (used to convert water consumption to cooling output).

ASHRAE Fundamentals psychrometrics by name; classical thermodynamics.

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