切片多孔介质对流干燥传质模拟软件开发研究

根据非平衡态热力学和相平衡理论,建立了多孔介质对流干燥内部传质模型、传热模型,该模型充分考虑了传热与传质之间的相互藕合关系。用VB编程软件对该模型进行了分析求解,设计开发模拟软件。以切片土豆为例进行传质模拟计算,并与土豆片干燥实验数据进行对比,结果表明:模拟值和实测值十分接近,二者的最大相对偏差小于9.1%。模拟结果显示土豆对流干燥中内部水分由内往外迁移,以及干燥过程中产生的表低内高水分分布规律。

Mass-Transfer Simulation Software Study of Sliced Porous Production during Convection Drying Process

In this paper, on the base of non-equilibrium thermodynamic theory and phase equilibrium principle, a mass-transfer mathematical model and a heat-transfer mathematical model for convective drying of porous me-dia was established. In this model, the coupled heat and mass transfer was considered enough. Software was designed for the simulation of porous production slice during drying process in Visual Basic. The mass-transfer for potato slice was simulated by the software, and the simulated results were compared with experimental data. The results indicated that simulation values agree with experiment data. The simulation result of the moisture distributing internal potato slice during drying process was according with the humidity transfer rule. The simulation method was feasible.