The effect of air relative humidity on the evaporation temperature of water-ethanol droplets

Abstract

Abstract Using the method of infrared thermography, an experimental study of the temperature of evaporating droplets of a water-ethanol solution of different concentrations suspended on polypropylene thread at different air relative humidity was carried out. It is shown that the amplitude of the diminution in droplet temperature during evaporation decreases with an increase in relative air humidity for all considered concentrations of the water-ethanol solution. It is shown that the pattern of decreasing the minimum temperature of cooling of the evaporating droplets with increasing ethanol concentration is characteristic of all the studied air relative humidity. The obtained experimental data are generalized and can be used when calculating the heat and mass transfer of evaporating droplets of the water-ethanol solution.