全孔板通风系统储粮调质的模拟研究  

Simulation study on grain conditioning of full-aperture plate ventilation system

作　　者：杨开敏[1] 董晓倩 刘家琦 褚凤娇 YANG Kaimin;DONG Xiaoqian;LIU Jiaqi;CHU Fengjiao(School of Thermal Engineering,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]山东建筑大学热能工程学院,山东济南250101

出　　处：《山东建筑大学学报》2024年第4期39-47,共9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”(鲁教[2021]51号)。

摘　　要：研究不同调质通风工况粮堆内部热湿迁移规律的影响,可以为选择高效的调质通风策略以及实现绿色环保储粮提供理论支持。文章基于多孔介质流动和传热传质理论,以高大平房仓的玉米粮堆为研究对象,模拟了降温降水、升温降水、降温增水和升温增水4种调质通风方式,研究了不同调质通风对粮堆含水率变化情况的影响。结果表明:通风条件相同时,升温降水工况下粮堆含水率比降温降水工况的下降了约0.85%,降温增水工况下粮堆含水率比升温增水工况的增加了约0.90%;通风相对湿度差、通风工艺相同的条件下,随着吨粮通风量的增加,降水工况的降水速率和增水工况的增水速率均有加快。升温降水、降温降水、降温增水和升温增水4种工况在最大通风量下粮堆平均含水率达到稳定所需要的时间相比于最小通风量分别减少了21、20、20和15 d。Investigating the effects of heat and moisture migration within grain piles under varied tempering ventilation conditions provides theoretical support for selecting efficient ventilation strategies and promoting environmentally friendly grain storage.Based on the theory of porous media flow and heat and mass transfer,this study takes the corn grain pile of large warehouse as the research object.It simulates four kinds of conditioning and ventilation methods,which are cooling and precipitation,heating and precipitation,cooling and increasing water,and heating and increasing water.The influence of different conditioning and ventilation methods on the change of moisture content in the grain pile are studied.The results show that under the same ventilation conditions,the moisture content of grain pile under the condition of heating and precipitation decreases by about 0.85%compared to the cooling and precipitation conditions,while the moisture content of grain pile under the condition of cooling and increasing water increases by about 0.90%compared to the heating and water increasing conditions;Under the condition of poor ventilation relative humidity and the same ventilation process,with the increase of ventilation volume per ton of grain,the precipitation rate of precipitation condition and the water increase rate of water increase condition are accelerated.The time required to stabilize the average moisture content of the pile at maximum ventilation is reduced by 21,20,20 and 15 d for the four conditions of heating precipitation,cooling precipitation,cooling water increase and heating water increase,respectively,compared to minimum ventilation.

关 键 词：通风策略 高大平房仓 温度 含水率 

分 类 号：S379[农业科学—农产品加工]