To analyze the evaporization characteristic of water droplet(which vaporized in the direct air-cooling spraying system) and the influence of factors such as droplet diameter

environmental temperature and humidity

and atmospheric pressure on the evaporization characteristics

an evaporization model of the water droplet was established.Results show that

the evaporization time of the droplet in air is directly proportional to square of the droplet diameter.For the spray cooling system with adiabatic humidification

the authors suggest that the spray droplet diameter should not be larger than 40μm.The environmental temperature has a little influence on the droplet evaporization characteristics.However

the humidity has a greater one.Thus

environmental humidity should be controlled below 75%

and the spray cooling system with adiabatic humidification is not applicable to areas where the average humidity of the 3 hottest months of a year is higher than 60%.The atmospheric pressure almost has no effect on the evaporization characteristics.