摘要
通过散装粮堆多场耦合试验,研究仓储稻谷堆单元体静态储藏72 h的过程中,在竖向压力从0 kPa增大到100 kPa热质传递过程中的温湿度分布及变化规律。结果表明:在平均室温26.9℃、室内平均相对湿度64.4%、初始粮温25.0℃、初始湿度69.8%的条件下,0 kPa时稻谷堆高温与低温控制区平均温度变化率前24 h为24.6%、27.9%,后48 h为7.6%、3.5%;100 kPa时高温与低温控制区平均温度变化率前24 h为23.2%、29.9%,后48 h为11.5%、1.8%。平均相对湿度变化率在0 kPa和100 kPa时分别为3.5%、4.1%。过渡区平均相对湿度逐渐降低后进入稳定状态,平均相对湿度与温度梯度符合二次函数关系,且过渡区稳态平均相对湿度为函数峰值点,随着竖向压力的增大而降低。
Through the multi-field coupling test of bulk grain pile, the temperature and humidity distribution and change rule in the process of heat and mass transfer from 0 kPa to 100 kPa during the 72 h static storage of rice pile unit were studied. The results showed that under the conditions of average room temperature 26.9 ℃, indoor average relative humidity 64.4 %, initial grain temperature 25.0 ℃ and initial humidity 69.8 %, the average temperature change rates in the high and low temperature control areas of rice pile at 0 kPa were 24.6 % and 27.9 % in the first 24 h, and 7.6 % and 3.5 % in the last 48 h. At 100 kPa, the average temperature change rates of high and low temperature control areas were 23.2 % and 29.9 % in the first 24 h, and 11.5 % and 1.8 % in the last 48 h. The average relative humidity change rates were 3.5 % and 4.1 % at 0 kPa and 100 kPa, respectively. The average relative humidity in the transition zone gradually decreased and then entered the steady state. The average relative humidity and the temperature gradient conformed to the quadratic function relationship, and the steady state average relative humidity in the transition zone was the peak point of the function, which decreased with the increase of the vertical pressure.
作者
袁亚豪
黄达城
刘超赛
卢敬然
葛蒙蒙
刘文磊
YUAN Ya-hao;HUANG Da-cheng;LIU Chao-sai;LU Jing-ran;GE Meng-meng;LIU Wen-lei(College of Civil Engineering,Henan University of Technology,Zhengzhou 450001,Henan,China)
出处
《粮食与油脂》
北大核心
2023年第3期76-80,共5页
Cereals & Oils
基金
国家粮食公益性行业科研专项(201513001)
河南省科技研发计划联合基金项目(222103810073)
河南省科技研发计划联合基金项目(222103810082)
省属高校基本科研业务费专项资金项目(2020ZKCJ05)。
关键词
稻谷堆
温度梯度
相对湿度
竖向压力
rice pile
temperature gradient
relative humidity
vertical pressure
