Author(s): CUI Qingliang, GUO Yuming, ZHENG Decong
Pages: 124-127
Year: 2010 Issue:  4
Journal: Transactions of the Chinese Society for Agricultural Machinery
Keyword:  Freeze-drying; Drying dynamical characteristics; Sublimation; Desorption; Judgment;
Abstract: 判断冷冻干燥过程的升华干燥结束点和解吸干燥结束点,对冷冻干燥过程的优化控制有重要意义.以富士苹果为试验材料,在JDG-0.2型真空冻干试验机上进行了冷冻干燥动力学特性试验.采用自制的物料水分在线测量系统,实时测量和绘制苹果块在冷冻干燥过程中的含水率及其变化曲线,根据测量数据分析了物料冷冻干燥动力学特性,提出了升华干燥结束点和解吸干燥结束点的判别方法,便于冷冻干燥过程参数的优化控制.