鲁西北地区平房仓常规储藏储粮温度分布规律研究

Study on the Temperature Distribution Law of Conventional Grain Storage in Warehouse in Northwest Shandong Province

以平房仓为研究对象,以小麦粮堆为目标,利用温度传感器监测气温、仓温及粮堆温度,运用模拟软件重现不同季节、不同部位平房仓小麦粮堆温度场,追溯分析粮堆各点温度变化情况。结果表明:粮温年变的最低值和最高值发生的时间较气温年变的最低值和最高值推迟1~2个月;上层粮温受外温影响最大,中下层和下层受外温影响小,粮温较为稳定;夏季粮堆中存在较大体积的“冷心”,使整个粮堆可以安全度夏;冬季,粮堆温度呈现热冷多层次区域变化,粮堆中部存在温度较高的“热心”,由“热心”驱动的湿热转移是导致结露发生的内因,要多注意观察防止粮堆结露。

Taking the warehouse as the research object and the wheat grain pile as the goal,the temperature sensor was used to monitor the air temperature,warehouse temperature and grain pile temperature,and the simulation software was used to reproduce the temperature field of wheat grain pile in different seasons and different parts,and retrospective analyze the temperature change at each point of the grain pile.The results showed that the occurrence of the lowest value and the highest value of annual grain temperature was 1~2 months later than the lowest value and the highest value of annual air temperature.The upper grain temperature was most affected by the outside temperature,while the middle and lower layers were little affected by the outside temperature,and the grain temperature was relatively stable.In summer,there was a large volume of“cold core”in the grain pile,so that the whole grain pile spent the summer safely.In winter,the temperature of grain pile presented a multi-level regional change of hot and cold,and there was a high temperature“hot core”in the middle of grain pile.The transfer of moisture and heat driven by“hot core”was the internal cause of condensation,so more attention should be paid to prevent condensation in grain pile.