苹果切片红外辐射干燥模型建立与评价

Modeling and Evaluation of Infrared Radiation Drying for Apple Slices

选择加热温度为60℃,辐射功率为750 W,辐射距离为100 mm,物料厚度为5 mm时的红外辐射干燥苹果切片试验数据作为实测值样本,基于Matlab软件,利用高斯-牛顿算法,对传统干燥模型进行非线性最小二乘数据拟合求解,确定干燥系数。通过决定系数R2、误差平方和(SSE)及均方误差的根(RMSE)等拟合优度评价指标对各种干燥模型进行评价。结果表明,用Modified Page equation-Ⅱ模型能够更好地预测和控制苹果切片红外辐射干燥过程。

The traditional drying models fitted to experimental data and the drying coefficients were determined by means of nonlinear least square based on the Matlab software using the Gauss-Newton algorithm.The experimental data from infrared radiation drying of apple slices were used as measured samples.The tests were performed with the materials temperature of 60℃,the radiation power of 750W,the radiation distances of 100mm and materials thickness of 5mm.15 different mathematical drying models were compared by some evaluation targets such as coefficient of determination（R2）,square sum of error（SSE） and root mean square error（RMSE）.It showed that the Modified Page equation-Ⅱ model could sufficiently predict and control the infrared radiation drying process of apple slices.