Evaporation characteristics in a naturally ventilated, fog-cooled greenhouse

In a greenhouse cooled by a fogging system, the fraction of fog that evaporates by absorbing sensible heat from the greenhouse air, β, is an essential parameter to be determined for evaluating the system performance. Recent studies estimated β under indoor conditions by collecting the non-evaporated fog that fell on a plastic sheet during a specified time and β was the difference between the amount of sprayed fog and the non-evaporated fog divided by the amount of sprayed fog. Using this method in the greenhouses causes an overestimation of β due to the evaporation of the fog that fell on the plant leaf/floor surfaces affected by solar and thermal radiation and the difficulty of collecting the non-evaporated fog that falls on the plant leaf surfaces.