食品科学 ›› 2012, Vol. 33 ›› Issue (15): 90-94.

• 基础研究 • 上一篇    下一篇

紫薯热风干燥特性及数学模型

李 菁1,萧 夏1,蒲晓璐1,黄艳斌1,陈厚荣1,2,3,4,*   

  1. 1.西南大学食品科学学院 2.重庆市特色食品工程技术研究中心 3.重庆市农产品加工技术重点实验室 4.食品科学与工程实验教学中心
  • 收稿日期:2011-07-14 修回日期:2012-07-04 出版日期:2012-08-15 发布日期:2012-09-07
  • 通讯作者: 陈厚荣 E-mail:chourong@swu.edu.cn
  • 基金资助:

    四川省科技厅资助项目

Characteristics and Mathematical Model of Hot-Air Drying for Purple Sweet Potato

  • Received:2011-07-14 Revised:2012-07-04 Online:2012-08-15 Published:2012-09-07

摘要: 目的:以新鲜紫薯为原料,研究其热风干燥特性及数学模型。方法:以铺料密度、干燥温度、热风风速为因素,研究其对紫薯热风干燥特性的影响,并通过SAS8.0软件对实验数据进行拟合得出紫薯热风干燥模型。结果:得到紫薯热风干燥的干燥特性曲线和干燥速率曲线;紫薯热风干燥数学模型为ln(-lnMR)=ln(-0.0104+0.000283T+0.00427V-0.0126P)+(1.1830-0.00067T+0.0487V-0.1332P)lnt(MR为水分比;T为干燥温度/℃,V为物料干燥热风速率/(m/s);P为物料干燥铺料密度/(g/cm2;t为干燥时间/min)。结论:干燥温度、物料铺料密度对紫薯热风干燥的速率有较大影响,而热风风速对干燥速率的影响较小;紫薯热风干燥符合Page模型。

关键词: 紫薯, 热风干燥, 特性, 模型

Abstract: Purpose: The hot-air drying characteristics and mathematical model of fresh purple potato were explored in this study. Methods: The effects of different factors including material loading density, hot-air temperature and hot-air speed on   hot-air drying characteristics were investigated. Meanwhile, the experimental data obtained were processed using SAS8.0 software for mathematical modeling. Results: A hot-air drying curve and a drying rate curve were established. The proposed mathematical model describing the hot-air drying of purple potato was ln (-lnMR) = ln (-0.0104 + 0.000283T + 0.00427V - 0.0126P) + (1.1830 - 0.00067T + 0.0487V -0.1332P) lnt, where MR was water ratio, T temperature (℃), V hot-air speed (m/s), P material loading density (g/cm2), and t drying time (min). Conclusion: Hot-air temperature and material density had a greater impact on drying rate, while hot-air speed on drying rate revealed less effect. The established hot-air drying model for purple sweet potato was in good agreement with the Page model.

Key words: purple sweet potato, hot-air drying, characteristics, model

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