Saying to the heat transfer between the water film and the
air in an evaporative condenser (the range of tube wall
temperature is less than that of an evaporative cooler) mainly,
Z.R. Zhang. has considered the heat transfer between the
sprinkling water and the air as the two parts of sensible heat
transfer and latent heat transfer (mass transfer), the mass
transfer and sensible heat transfer adapts to Louis function,
and based on this, the equivalent heat transfer coefficient is
introduced, so that the heat transfer of cooled fluid inside tube