This combination of freezing pretreatment and a fluidized-bed
drying under reduced pressure was expected to afford a low drying
temperature, high drying rate, and small volume change during
the drying process for carrot samples, and the method should be
applicable to the drying of heat-sensitive food and agricultural
products. The effect of the freezing pretreatment on the drying
characteristics and volume change in carrots during drying in the
fluidized bed of inert particles under reduced pressure is examined
herein.