Could anyone tell me the way to calculate water evaporation heat transfer on a titled plate?
Heat transfer from water evaporation in any surface is pure latent heat transfer. It is represented by enthalpy (latent heat) of evaporation of water that can be find in thermodynamic table for saturated water. However, if water evaporation is below boiling temperature of water (100C) then the latent heat transfer (water evaporation) is because of the vapour pressure of ambient air that is below the saturated pressure of water at ambient temperature. Under this conditions, the water evaporation will stop when vapour pressure of ambient air equal to saturated pressure of water at ambient temperature. This heat transfer equal to air mass flow rate times enthalpy of evaporation of water times absolute humidity increased of the ambient air. You may have better picture when you read thermodynamic book by Cengel chapter 14.
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