华南地区高大平房低温仓粮品堆码方式数值模拟与试验研究

Numerical simulation and experimental study on stacking mode of high-rise bungalow low-temperature grains warehouse in South China

为确保粮品存储安全,针对华南地区低温粮仓内粮堆间距对粮食冷却时间的影响问题,提出“间距比”概念描述粮食堆码方式.以华南地区某高大平房低温仓为例,以粮库内局部最高粮温这一指标为基础,运用试验及数值模拟方法获得合适的模拟方法并得出间距比-冷却时间的对应关系.结果显示间距比-冷却时间曲线在定义域内存在最小值,即存在最佳间距比.试验范围内最佳间距比分布于0.70~0.80之间.结果表明该粮库采用最佳间距比堆放相对最差工况可节省40%的冷却时间,此研究可为华南区粮食高效仓储提供参考.

Considering the effect of the spacing of the inner grain piles of low temperature granaries on the cooling time of grain in South China,the concept of“spacing ratio”was proposed to describe the grain stacking method to ensure the safety of grain storage.Taking a high-rise low-temperature warehouse in South China as an example,based on the local maximum grain temperature in the grain storage,the appropriate simulation method was obtained by experiment and numerical simulation method,and the correspondence between the spacing ratio and the cooling time was obtained.Testing results indicated that there was a minimum value in the domain of the spacing ratio-cooling time curve ie an optimal spcaing ratio.The optimum spacing ratio in the experimental range was between 0.70 and 0.80.The results showed that,compared with the worst case of stacking,40%of the cooling time could be saved under the optimal spacing of the grain depot.This study provided reference for grain efficient storage in South China.