基于COMSOL多物理场的多孔介质缓苏干燥模拟
Simulation of tempering drying of porous media based on COMSOL multi-physics field
刘丁通 1刘泽钰 2刘绍东 3冯太4
作者信息
- 1. 山东科技大学储能技术学院清洁能源实验室,山东 青岛 266590
- 2. 中科瑞能(山东)科技有限公司,山东 济南 250301
- 3. 中科瑞能(山东)科技有限公司,山东 济南 250301;山东好汉种业科技有限公司,山东 济南 250101
- 4. 山东科技大学储能技术学院清洁能源实验室,山东 青岛 266590;中科瑞能(山东)科技有限公司,山东 济南 250301
- 折叠
摘要
[目的]探究缓苏过程中温度场和湿度场的变化规律.[方法]将玉米粒和粮堆分别作为多孔介质,利用COMSOL Multiphysics传热模块中的热湿流动接口进行多物理场耦合.[结果]5次缓苏6次干燥使玉米粒的相对湿度从22.5%降至4.97%,进行2次缓苏3次干燥后玉米粒的平均相对湿度降低至11%,干燥效果相较无缓苏干燥提高了9.5%.常温通风缓苏策略在减少一次干燥的前提下获得了相同的效果.[结论]缓苏策略通过减小水分梯度,有效提高了干燥速率,缩短了总的热风干燥时间,但干燥和缓苏时间增加.风干仓中常温通风缓苏策略的应用,可进一步减少干燥后期所需的缓苏次数和时间.
Abstract
[Objective]To investigate the variation laws of temperature and humidity fields during the tempering process.[Methods]Using corn kernels and grain piles as porous media,perform multi-physics field coupling using the heat and moisture flow interface in the COMSOL Multiphysics heat transfer module.[Results]Five tempering and six drying processes reduced the relative humidity of corn kernels from 22.5%to 4.97%,and after two tempering and three drying processes,the average relative humidity of corn kernels decreased to 11%.The drying effect improved by 9.5%compared to no tempering drying.The same effect was obtained by the strategy of tempering at normal temperature with less drying time.[Conclusion]The tempering strategy effectively improves he drying rate by reducing the moisture gradient,shortening the overall hot air drying time.However,the drying and slow fermentation times are increased.The application of ambient temperature ventilation slow fermentation strategies in the air-drying chamber can further reduce the number and duration of slow fermentation sessions required in the later stages of drying.
关键词
玉米干燥/多孔介质/缓苏/粮堆/多物理场/COMSOLKey words
corn drying/porous media/tempering/grain pile/multi-physics field/COMSOL引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据