摘要
为了研究地下仓储粮期间小麦粮堆的温湿度变化,采用TOPRIE-TP700多路数据记录仪和TOPRIE-TP2305温湿度传感器对模型仓内小麦粮堆的温湿度进行了96 h实仓测试,并利用数值模拟软件COMSOL,通过简化内置质量守恒方程、能量守恒方程和动量守恒方程,对相同尺寸的地下仓进行了相同时长的数值模拟。通过模拟和实测数据进行对比得出:仓内空气域温度随外界环境温度变化而变化,波动幅度最大为1.2℃,且表现出滞后性,滞后时长达4 h;随着纵向深度的增加,环境温度对小麦粮堆温度的影响越来越小,且浮升力的存在使得湿空气向空气域逸散,进而粮堆的相对湿度降低。
In order to study the temperature and humidity changes of wheat pile during the underground storage,TOPRIE-TP700 multi-channel data logger and TOPRIE-TP2305 temperature and humidity sensor were used to measure the temperature and humidity of the wheat pile in a model warehouse for 96 hours.Numerical simulations for the same size of underground silos were carried out for the same duration using the software COMSOL,by simplifying the built-in mass conservation equation,energy conservation equation,and momentum conservation equation.With the comparison of simulation and measured data,it was concluded that the internal air temperature of the warehouse alters as the external temperature changes,and the fluctuation range is 1.2℃with a delay as long as 4 hours.As the vertical depth increases,the impact of external temperature on the temperature of the wheat pile was getting smaller and smaller.In addition,the buoyancy forces moisture to escape to the air,hence the relative humidity in the grain pile decreases.
作者
王振清
张祥祥
陈曦
WANG Zhen-qing;ZHANG Xiang-xiang;CHEN Xi(School of Civil Engineering,Henan University of Technology,Zhengzhou 450001,China)
出处
《保鲜与加工》
CAS
2021年第7期25-30,共6页
Storage and Process
基金
国家自然科学基金资助项目(51708180)
粮食公益性行业科研专项(201413007-01,201513001-03)。
关键词
地下仓
温度场
湿度场
数值模拟
underground warehouse
temperature field
humidity field
numerical simulation
