Authors
Title
Physical properties of convectionally dried carrot under variable air temperature
Abstract
During drying in a cabinet drier step changes and rectangle pulses for the temperature +/-20°C from the reference level 70°C were introduced. The following physical properties of dried carrot were determined: density, shrinkage, rehydration, compressive force after rehydration of a sample, and leakage. Decreasing for one hour the drying temperature from 70°C to 50°C resulted in dried carrot with lower density, comparable final shrinkage, various levels of rehydration, and slightly higher leakage. Increasing for one hour the drying temperature from 70°C to 90°C resulted in dried carrot with higher density, comparable final shrinkage, lower rehydration, lower leakage than carrot dried at constant temperature 70°C.