CAJ | 학술논문

研究了菜豆种子在红外固定床干燥过程中,种皮结构的变化及种皮对干燥动力学特性的影响.运用描述种子干燥过程特征的内部水分扩散模型,确定了种子的水分扩散系数,模型与实验数据相吻合.研究表明,无种皮时种子的水分扩散系数为有种皮时的1.67倍,种子子叶层的扩散系数是种皮层的3.2倍,种皮是种子干燥过程中主要的传质阻力之一,也是优化传热与传质的关键.
연구료채두충자재홍외고정상간조과정중,충피결구적변화급충피대간조동역학특성적영향.운용묘술충자간조과정특정적내부수분확산모형,학정료충자적수분확산계수,모형여실험수거상문합.연구표명,무충피시충자적수분확산계수위유충피시적1.67배,충자자협층적확산계수시충피층적3.2배,충피시충자간조과정중주요적전질조력지일,야시우화전열여전질적관건.
Kidney bean seed was dried in a laboratory scale fixed bed. The effect of seed coat on drying dynamiccharacteristics and the changes of seed coat structure were investigated. A mathematical model was establishedto simulate the drying process and determine the moisture diffusivity. Numerical results agree well with the ex-perimental data. The average moisture diffusivity of the seed with separated coat is 1.67 times largei than thatof the seed with coat, and the moisture diffusivity of seed cotyledon is 3.2 times larger than that of the seedcoat. It is proved that the seed coat is the most main resistance of mass transfer and is also one of the key pointsof the optimization of heat and mass transfer for seed drying.