中文摘要：

首先建立了单颗粒小麦内部水分迁移模型，基于有限元的方法数值模拟了颗粒内部水分变化规律，通过回归数值模拟数据，得到了颗粒平均水分模型和平均水分变化的干燥（或吸湿）速率模型。在此基础上推导出了谷物颗粒堆积床双扩散传热传质模型，并采用有限元的方法数值模拟分析了就仓横向（水平）谷冷通风时仓储粮堆内部热湿耦合传递规律。通过比较数值模拟和试验测定数据，验证了所建立的模型的合理性。分析了横向谷冷通风时粮粒温度和水分以及粮粒周围空气温度的变化规律，探讨了横向谷冷通风时粮堆内部降温效果。

英文摘要：

A diffusive moisture transfer equation for a single grain kernel was presented and solved with Finite Element Method （FEM）, moisture content distribution inside the kernel were examined, and the average non -di- mensional moisture content and its time - rate of change were obtained. By regression these numerical data, a kernel - average moisture model was derived, which was extended to volumetric mass transfer for a bed of kernels. Based on the kernel - average moisture model, the one - dimensional double - diffusivity heat and moisture transfer model were derived for a stationary bed of kernels, and were solved to simulate the evolution of grain temperature and moisture content of stored wheat in a warehouse during the cooling aeration with a horizontal air flow. Validation was performed by comparing between predicted and measured grain temperature and moisture content of Grain depot. Predicted data were in reasonable good agreement with measured ones, and the effect of the aeration was also evaluated.