苹果片气调热泵干燥特性及数学模型

doi:10.7506/spkx1002-6630-201405003

食品科学

苹果片气调热泵干燥特性及数学模型

罗磊，支梓鉴，刘云宏，朱文学，张玉先，王强，朱敏

河南科技大学食品与生物工程学院，河南洛阳 471023

出版日期:2014-03-15 发布日期:2014-04-04

Drying Characteristics and Mathematical Modeling of Heat Pump Drying of Apple Slices by Filling Nitrogen and Lowering Oxygen

LUO Lei, ZHI Zi-jian, LIU Yun-hong, ZHU Wen-xue, ZHANG Yu-xian, WANG Qiang, ZHU Min

College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, China

Online:2014-03-15 Published:2014-04-04

摘要/Abstract

摘要：

研究苹果片充氮低氧热泵干燥的干燥特性，结果表明：温度、切片厚度对其干燥速率影响较大，风速和氧体积分数对干燥速率影响较小。通过干燥曲线的对数转换及线性拟合，确定苹果片的薄层干燥模型为Page方程。利用逐步回归法，确定由干燥温度、物料厚度、风速及氧体积分数表示的干燥常数k、n的表达式。通过实验值与计算值的比较，可知该模型具有较高的预测精度，能很好地描述苹果片充氮低氧热泵干燥过程。

关键词: 热泵干燥, 苹果片, 充氮低氧, 数学模型

Abstract:

The drying characteristics of apple slices in a heat pump by filling nitrogen and lowering oxygen were studied.The results showed that drying temperature and material thickness had noticeable effects on drying rate. However, theeffects of air velocity and oxygen concentration were little. By logarithmic transformation of drying curves and linear fitting,the Page model for describing the heat pump drying of apple slices was obtained. Using a stepwise regression method,the expressions of modeling coefficients (k and n) were established with respect to drying temperature, material thickness,air velocity and oxygen concentration. Only slight differences were found between the predicted and calculated results.Therefore, this mathematical model could be used to sufficiently predict and describe the heat pump drying process of appleslices by filling nitrogen and lowering oxygen.

Key words: pump drying, apple slices, filling nitrogen and lowering oxygen, mathematical model

罗磊，支梓鉴，刘云宏，朱文学，张玉先，王强，朱敏. 苹果片气调热泵干燥特性及数学模型[J]. 食品科学, doi: 10.7506/spkx1002-6630-201405003.

LUO Lei, ZHI Zi-jian, LIU Yun-hong, ZHU Wen-xue, ZHANG Yu-xian, WANG Qiang, ZHU Min. Drying Characteristics and Mathematical Modeling of Heat Pump Drying of Apple Slices by Filling Nitrogen and Lowering Oxygen[J]. FOOD SCIENCE, doi: 10.7506/spkx1002-6630-201405003.

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苹果片气调热泵干燥特性及数学模型

Drying Characteristics and Mathematical Modeling of Heat Pump Drying of Apple Slices by Filling Nitrogen and Lowering Oxygen

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