Thin-layer drying of sweet potato chips and pressed grates

摘要

Thin-layer drying characteristics of sweet potato chips and pressed grates were determined. Drying conditions were: temperatures of 33℃, 51℃, and 70℃; airflow rates of 0.084 and 0.145 m{sup}3/(s·m{sup}2); and absolute humidity of 1.003 × 10{sup}(-2) kg H{sub}2O/kg dry air. The drying rates of pressed grates were higher than those of chips. The modified Page equation describes thin-layer drying of chips and pressed grates. The drying time required for chips to reach the moisture ratio of 0.5 varied between 2.4 and 6.1 times that of pressed grates.