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Position: Home > Articles > Mathematical Modeling of Hot Air Drying of Thin Layer Litchi Flesh Transactions of the Chinese Society for Agricultural Machinery 2012,43 (2) 151-158+191

荔枝果肉热风干燥薄层模型

作  者：
关志强;王秀芝;李敏;蒋小强;谢晶
单  位：
上海海洋大学食品科学与工程学院;广东海洋大学工程学院;广东石油化工学院化学与生命科学学院
关键词：
荔枝果肉;热泵干燥;干燥特性;薄层干燥模型
摘  要：
利用热泵干燥装置探讨了热风温度和热风风速对荔枝果肉干燥水分比MR和干燥速率U的影响。结果表明:荔枝果肉薄层热风干燥是内部水分扩散控制的降速干燥过程。对9种常见食品薄层干燥模型进行试验数据非线性拟合,通过比较评价决定系数R2、卡方χ2和标准误差eRMSE以及试验验证,结果显示Page模型是描述荔枝果肉薄层热风干燥过程的最优模型。不同干燥条件下有效水分扩散系数Deff和活化能Ea的求解结果表明,有效水分扩散系数Deff随热风温度和风速的增加而变大,平均活化能Ea为29.939 kJ/mol。
译  名：
Mathematical Modeling of Hot Air Drying of Thin Layer Litchi Flesh
作  者：
Guan Zhiqiang 1 Wang Xiuzhi 2 Li Min2 Jiang Xiaoqiang 2 Xie Jing 3 (1.College of Chemistry and Life Sciences,Guangdong University of Petrochemical Technology,Maoming 525000,China 2.Engineering College,Guangdong Ocean University,Zhanjiang 524000,China 3.College of Food Science and Technology,Shanghai Ocean University,Shanghai 201306,China)
关键词：
Litchi flesh,Heat pump drying,Drying characteristics,Thin layer drying model
摘  要：
The influences of drying temperature and hot air speed on the moisture ratio M R and the drying velocity U of litchi were studied by self-building heat pump drying device.The results showed that drying process of litchi occurred in the falling rate period,and the moisture transfer was controlled by internal diffusion.Nine different dynamic models were fitted nonlinearly by using the drying test data of litchi in the heat pump device.The results of comparing the values of the correlation coefficient R 2,the reduced chi-square χ 2 and the root mean square error e RMSE and the verification testing showed the Page model was the best suitable to descript the relationship of litchi moisture and drying time by hot air drying.The effective moisture diffusion coefficient D eff and the activation energy E a were also obtained by experiments under different conditions,the values of D eff would increase with the addition of drying temperature and hot air speed,the average value of E a was 29.939kJ/mol.

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