储粮机械通风降温时间的计算方法分析及改进  

Analysis and Improvement of Method for Calculating Cooling Time in Mechanical Ventilation

作　　者：丁超[1] 杨国峰[1] 

机构地区：[1]南京财经大学食品科学与工程学院,江苏南京210003

出　　处：《粮食与饲料工业》2008年第12期15-16,共2页Cereal & Feed Industry

基　　金：国家"十一五"科技支撑计划项目(2006BAD08B05);江苏省高技术计划(农业)项目(BG2007340)

摘　　要：通过对原有的机械通风降温时间的计算式进行分析,得出原有计算通风降温时间的方法未考虑到通风降温的两种情况:粮堆平均温度达终点温度时粮面温度未下降和通风过程中粮面温度已下降。对机械通风降温的这两种情况分析并推导出不同情况下的计算式,进而通过实例验证其正确性。Through the analysis of the formula which was used to calculate the cooling time in mechanical ventilation, following two conditions were taken into account： the temperature of surface of grain stack was not decreased when the average temperature of grain stack reached goal temperature and the surface temperature was decreased during the aeration process. Two conditions and deduced different computing methods were analyzed and their correctness was proved through an example.

关 键 词：粮食储藏 机械通风 降温时间 计算方法 

分 类 号：S379[农业科学—农产品加工]