Frosting process on a horizontal plate was experimentally investigated in this paper. This study focuses on several factors affecting the condensate water droplets freezing process and frost layer growth process

i.e. the cooling surface temperature

the air temperature and humidity

and the surface type. The results showed that the condensate droplets are smaller and freeze earlier with lower cooling surface temperature and lower humid air temperature. The water droplets freezing onset time on the hydrophobic surface is about 13 min later than on the bare aluminum surface

which means the frost process on the hydrophobic was delayed. The frost layer grows faster with lower cooling surface temperature and higher air velocity.