农业机械学报2012，Vol.43Issue(5)：130-135,6.DOI:10.6041/j.issn.1000-1298.2012.05.022
苹果片变温压差膨化干燥特性与动力学研究
Drying Characteristics and Dynamics of Apple Slices by Explosion Puffing Drying at Variable Temperatures and Pressure Difference
摘要
Abstract
The objective was to investigate the effects of puffing initial moisture content and vacuum drying temperatures on the characteristics of apple slices dried by explosion puffing drying at variable temperatures and pressure difference. The drying kinetics model of explosion puffing drying at variable drying conditions was obtained. Results showed that the drying process of explosion puffing drying at variable temperatures and pressure difference obviously existed increase-rate, constant-rate and falling-rate period. Page model provided better simulation of drying curves for apple slices at different puffing drying conditions. The effective moisture diffusivity of apple slices dried by explosion puffing drying at variable temperatures and pressure difference was among 1.52 × 10‐9 ~ 8,87 × 10 ‐9 m2/s. The established model can predict the moisture content change during explosion puffing drying time. Fitting undetermined coefficients k and n of Page model were linear with puffing initial moisture content and vacuum drying temperature. The coefficients of correlation r2 were 0, 845 and 0. 997, respectively.关键词
苹果片/变温压差膨化干燥/干燥特性/干燥动力学Key words
Apple slices/ Explosion puffing drying at variable temperatures and pressure difference/ Drying characteristics/ Drying kinetics分类
轻工纺织引用本文复制引用
何新益,程莉莉,刘金福,黄宗海,杜先锋,汪姣..苹果片变温压差膨化干燥特性与动力学研究[J].农业机械学报,2012,43(5):130-135,6.基金项目
天津市农业科技合作项目(0804160) （0804160）
