Hot Air Drying
Hot air drying applications involve, primarily, the evaporation of water or another liquid such as a solvent from the surface being dried. Evaporation occurs as heated air circulates over and around the surface being dried as discussed in earlier blogs. In all cases this liquid evaporation consumes heat which results in cooling of the remaining liquid. One major consideration in drying, therefore, is how to prevent cooling of the as yet to be evaporated liquid below the temperatures that will sustain evaporation until the surface is completely dry.