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Thin-Layer Drying Characteristics and Modeling of Chinese Jujubes

机译：枣的薄层干燥特性及建模

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摘要

A mathematical modeling of thin-layer drying of jujubes in a convective dryer was established under controlled conditions of temperature and velocity. The drying process took place both in the accelerating rate and falling rate period. We observed that higher temperature reduced the drying time, indicating higher drying rates of jujubes. The experimental drying data of jujubes were used to fit ten different thin-layer models, then drying rate constants and coefficients of models tested were determined by nonlinear regression analysis using the Statistical Computer Program. As for all the drying models, the Weibull distribution model was superior and best predicted the experimental values. Therefore, this model can be used to facilitate dryer design and promote efficient dryer operation by simulation and optimization of the drying processes. The volumetric shrinkable coefficient of jujubes decreased as the drying air temperature increased.
机译：在温度和速度受控的条件下，建立了对流干燥机中枣干薄层干燥的数学模型。干燥过程在加速速率和下降速率期间都进行。我们观察到较高的温度减少了干燥时间，表明枣的干燥速度更高。使用枣的实验干燥数据拟合十个不同的薄层模型，然后使用统计计算机程序通过非线性回归分析确定所测模型的干燥速率常数和系数。对于所有的干燥模型，Weibull分布模型是优越的，可以最好地预测实验值。因此，该模型可用于简化干燥器设计并通过模拟和优化干燥过程来促进有效的干燥器运行。随着干燥温度的升高，枣的体积收缩系数降低。

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  • 来源
    《Mathematical Problems in Engineering》 |2012年第4期|p.386214.1-386214.18|共18页
  • 作者

    Xiao-Kang Yi; Wen-Fu Wu; Ya-Qiu Zhang; Jun-Xing Li; Hua-Ping Luo;

  • 作者单位

    College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China,College of Mechanical and Electronic Engineering, Tarim University, Alar 843300, China;

    College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China;

    College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China;

    Institute of Grain Machinery Research, Jilin Academy of Agricultural Machinery, Changchun 130022, China;

    College of Mechanical and Electronic Engineering, Tarim University, Alar 843300, China;

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