以新鲜柠檬为原料,利用数字型洞道干燥实验装置,研究了干燥温度、热风风量、柠檬片厚度、热风方向4个因素对柠檬洞道薄层干燥特性的影响。并通过SAS8.0软件对实验数据进行拟合得出柠檬洞道薄层干燥模型。结果表明:干燥温度(T)、热风风量(V)、柠檬片厚度(P)、热风方向(X)对柠檬片的干燥速率都有一定的影响,且柠檬片洞道薄层干燥符合Page模型,其数学模型为:ln(-lnMR)=ln[-0.00054+(1.487E-6)T+(7.771E-6)V+0.000062P-(7.29E-7)X]+(2.480 4-0.039 5V+0.002 05T-0.186 9P+0.001 29X)lnt。

With fresh lemon as raw materials,the influence of drying temperature,hot air volume,lemon piece thickness and hot air direction on lemon slices dried by tunnel hot air was investigated. Dehydration and drying rate curves were obtained by digital tunnel drying experimental device. Further,the experimental data were fitted by SAS8. 0 software and the lemon tunnel drying model was established. The result showed : the drying temperature( T),hot air volume( V),lemon slice thickness( P) and wind direction( X) all have a certain influence on the characteristics of dried lemon slices. Thin layer drying tunnel of lemon fits with Page model,the mathematical model is: ln(-lnMR) = ln(-0. 00054 + 1. 487E-6T +7. 771E-6V +0. 000062P-7. 29E-7X) +( 2. 4804-0. 0395 V +0. 00205T-0. 1869 P +0. 00129X) lnt.