摘要
改进储粮通风效果是确保粮食安全、绿色储藏的重要手段。文章以圭字形风道加垂直立管的新型通风网络为研究对象,利用数值模拟方法探究了不同立管高度和吨粮通风量对粮堆内温度场、水分场的影响,确定了最优的结构和运行参数。结果表明:平均温度和平均水分的下降速率在通风前期与立管高度呈正比,通风后期则与之呈反比;通风量越大,其降温效果越好,但同时也会增强通风道近处粮堆的吸湿作用;最优结构为在原有通风网络节点上加装高度为1.5 m的垂直立管,与最优结构对应的最佳吨粮通风量为5 m^(3)/(h·t)。
Improving the grain storage ventilation is a crucial method for ensuring food security and sustainable storage.This paper choose a novel ventilation network based on a Gui-shaped air duct and vertical riser as research object using numerical simulation to exam the influences of various riser heights and ventilation rates per ton of grain on the temperature and moisture fields within the grain pile.The optimal structure and operation parameters are also determined.The results show that the rate of decrease in average temperature and moisture is proportional to the riser height dueing the early stage of ventilation,but becomes inversely proportional during the later stage.The higher the ventilation volume,the better the cooling effect.But at the same time,it will intensify moisture absorption in grain piles near the ventilation ducts.After comprehensive analysis,the optimal structure is identified as a vertical riser height of 1.5m,with a recommended ventilation volume of 5 m^(3)/(h·t)per ton of grain.
作者
杨开敏
刘立军
高帅
李加斌
张寅森
YANG Kaimin;LIU Lijun;GAO Shuai;LI Jiabin;ZHANG Yinsen(School of Thermal Energy Engineering,Shandong Jianzhu University,Jinan 250101,China;Tong Yuan Design Group Co.,Ltd.,Jinan 250101,China)
出处
《山东建筑大学学报》
2024年第5期54-60,76,共8页
Journal of Shandong Jianzhu University
基金
江苏省宿州市科技计划项目(2021)
山东省高等学校青创人才引育计划创新团队项目(鲁教科函〔2021〕51号)。
关键词
数值模拟
结构优化
吨粮通风量
通风效果
numerical simulation
structure optimization
ventilation per ton of grain
ventilation effect
