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Modeling and mass transfer performance of Dioscorea alata L. slices drying in convection air dryer
Journal of Food Process Engineering ( IF 2.7 ) Pub Date : 2020-05-22 , DOI: 10.1111/jfpe.13427 Aishi Zhu 1 , Junzi Zhao 1 , Yuanfeng Wu 1
Journal of Food Process Engineering ( IF 2.7 ) Pub Date : 2020-05-22 , DOI: 10.1111/jfpe.13427 Aishi Zhu 1 , Junzi Zhao 1 , Yuanfeng Wu 1
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The drying experiments of Dioscorea alata L. slices were implemented in order to study the thin‐layer drying characteristics and kinetic in hot air forced convection tunnel dryer. The influences of temperatures, velocity, and slice thickness on the drying behavior were researched. Six commonly thin‐layer drying models were used to fit the experimental data to express the mass transfer characteristics. The fitting degree between models and experiment data was analyzed. The effective diffusion coefficients (Deff) and activation energy (Ea) were estimated. The air temperature, air velocity, and sample slice thickness had significant influence on drying time, dehydration rate, and Deff. The drying process had a momentary accelerating rate stage and a long falling rate stage; the Logarithmic model had good degree of fitting with all experiments data; and Arrhenius equation could be well expressed the relationship of Deff and drying temperature. The drying process of hot air thin layer of Dioscorea alata L. can be better described by the Logarithmic model. At the range of research conditions, the Deff value ranged from 4.77 × 10−10 m2/s to 8.90 × 10−10 m2/s; the Ea value was 20.74 kJ/mol.
中文翻译：
对流空气干燥机中薯Di切片的建模和传质性能
薯os的干燥试验。为了研究热风对流隧道式干燥机的薄层干燥特性和动力学，进行了切片。研究了温度，速度和切片厚度对干燥行为的影响。使用六个常用的薄层干燥模型拟合实验数据来表达传质特性。分析了模型与实验数据之间的拟合度。估算了有效扩散系数（D eff）和活化能（E a）。空气温度，空气速度和样品切片厚度对干燥时间，脱水速率和D eff有显着影响。干燥过程具有瞬时加速阶段和长时间下降阶段。对数模型与所有实验数据均具有良好的拟合度；Arrhenius方程可以很好地表达D eff与干燥温度的关系。薯hot热风薄层的干燥工艺。用对数模型可以更好地描述。在研究条件范围内，D eff值的范围为4.77×10 -10 m 2 / s至8.90×10 -10 m 2 / s；所述Ë一个值为20.74千焦/摩尔。
更新日期：2020-05-22
中文翻译：
对流空气干燥机中薯Di切片的建模和传质性能
薯os的干燥试验。为了研究热风对流隧道式干燥机的薄层干燥特性和动力学，进行了切片。研究了温度，速度和切片厚度对干燥行为的影响。使用六个常用的薄层干燥模型拟合实验数据来表达传质特性。分析了模型与实验数据之间的拟合度。估算了有效扩散系数（D eff）和活化能（E a）。空气温度，空气速度和样品切片厚度对干燥时间，脱水速率和D eff有显着影响。干燥过程具有瞬时加速阶段和长时间下降阶段。对数模型与所有实验数据均具有良好的拟合度；Arrhenius方程可以很好地表达D eff与干燥温度的关系。薯hot热风薄层的干燥工艺。用对数模型可以更好地描述。在研究条件范围内，D eff值的范围为4.77×10 -10 m 2 / s至8.90×10 -10 m 2 / s；所述Ë一个值为20.74千焦/摩尔。
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