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本文提出在某一地区大气条件下，对于某种粮食采用机械通风降水，单位风量的计 算与选择。在对粮食进行通风干燥过程中，根据进入粮堆热量、粮食水分气化所需要的热量 和粮食自身温度升降所需要的热量之间的热平衡关系，再根据单位风量和通风时间的函数关 系，以及机械通风干燥粮食的天数最多不能超过粮食的安全储藏天数这一原则，来计算和选 择略高于允许的最低单位风量，作为机械通风干燥粮食的单位风量。
This paper proposes the calculation and selection of the unit air volume for a certain kind of grain under the condition of atmospheric conditions in a certain area using mechanical ventilation and precipitation. In the process of ventilation and drying of food, the heat balance between heat required for entering food grain moisture, the amount of heat needed to vaporize water for food and the amount of heat required for the food to rise and fall in temperature, and then the unit volume of air and the ventilation time, and The principle of mechanically ventilated and dry food can not exceed the maximum storage days of food to calculate and select slightly above the allowable minimum unit air volume as the unit air volume of mechanically ventilated dry food.