What is the formula to evaluate evaporation?

Answer 1

W=((Pw-Pa)*(0.089+0.0782V)/Y)* 3600

W = Rate of evaporation at the surface of the water level (kg/h m2)

Pw = Vapor pressure at saturation taken at the temperature of surface of water, in kPa

Pa = Vapor pressure at the dew point according to the temperature of the ambient air of the room, in kPa

V = Air velocity above at the surface of water, in m/s

Y = Latent heat necessary according to the change of state of
the water vapor at the temperature of surface of water, in kJ/kg