芹菜热风干燥特性及数学模型

Hot-air drying characteristics and mathematic model of celery

为缩短芹菜热风干燥时间并保持其色泽,研究了热风干燥温度对干燥时间及色泽的影响。结果表明,温度越高,干燥时间越短,但对其色泽无显著影响。根据实验数据建立数学模型,芹菜热风干燥符合Page模型,模型拟合较好,此模型能预测芹菜热风干燥过程。实验结果表明在60℃热风干燥条件下,干燥时间短,色泽较好,因此芹菜适合在60℃的条件下热风干燥。

In order to shortening hot-air drying time and retaining the color of celery,the effect of hot-air drying temperature on drying time and color on celery were investigated.Results showed that the higher the drying temperature,the shorter the drying time,therefore there was no significant difference on color.The mathematic model was set up according to the experimental data,the hot-air drying of celery agreed with the Page model,the predicted value had a good agreement with the experimental value.This model was able to predict the hot-air drying progress of celery.The experiment result showed that the drying time was shorter,and the celery had a good appearance at 60 ℃ of hot-air drying,so the celery should be hotair dried at 60 ℃.