低温贮藏高水分稻谷过程中热湿耦合特性研究  

Study on Thermo-humidity Coupling Properties in Storage of Highmoisture Rice at Low Temperature

作　　者：甄仌[1] 许莹莹 杨红艳 周升田 周志男 Zhen Bing;Xu Yingying;Yang Hongyan;Zhou Shengtian;Zhou Zhinan(School of Energy and Civil Engineering,Harbin University of Commerce,Harbin,150028,China)

机构地区：[1]哈尔滨商业大学能源与建筑工程学院,哈尔滨150028

出　　处：《冷藏技术》2023年第1期58-65,共8页Journal of Refrigeration Technology

基　　金：黑龙江省自然科学基金联合引导项目(LH2019E069)。

摘　　要：高水分稻谷呼吸作用强烈,贮藏过程中会产生大量的热量和水分。为使其稳定贮藏,需降低谷堆温度,抑制其呼吸作用。当谷堆温度达到268 K时,其呼吸作用与常温贮藏低水分粮的呼吸作用相近,可以达到安全贮藏。设定针对263 K冷库稻谷进行横向通风分阶段降温,将谷堆最高温度降至268 K以下充分抑制其呼吸作用。模拟该通风过程中较高含水率的谷堆中心温湿度变化及其温湿度分布云图,分析不同进风速度和不同分堆方式对谷堆内部温湿度分布的影响。结果表明,利用分阶段降温通风的方式对较高水分稻谷进行低温贮藏的方式是可行的,在相同情况下进风风速为3 m/s的降温效果优于2 m/s和2.5 m/s,对谷堆进行合理的分堆可以提高降温效果且对库内气流阻挡小的分堆方式降温效果更好,温湿度分布更均匀。High water rice has a strong respiratory effect,and a lot of heat and water will be generated in the storage process.In order to stabilize its storage,it is necessary to lower the temperature of the grain storage and restrain its respiration.When the temperature of the grain pile reaches 268 K,its respiration is similar to that of low water storage at room temperature,and the safe storage can realized.It is designed to cool the rice in 263 K cold storage by cross ventilation in stages.The maximum temperature of the grain pile is reduced to below 268 K,and its respiration is fully restrained.The change of temperature and humidity in the center of grain pile with high moisture content and the cloud diagram of its temperature and humidity distribution during ventilation process is simulated.The influence of different inlet air velocity and different stacking methods on the temperature and humidity distribution in the grain pile is analyzed.The results show that it is feasible to store high moisture rice with staged cooling and ventilation.Under the same conditions,the cooling effect of the inlet air velocity of 3 m/s is better than 2 m/s and 2.5 m/s.The reasonable stacking of the grain pile can improve the cooling effect.The cooling effect of the stacking mode with small airflow barrier in the cold storage is better,and the temperature and humidity distribution is more uniform.

关 键 词：稻谷 低温贮藏 通风 呼吸作用 

分 类 号：S379[农业科学—农产品加工]