以气流冷却粮堆所能达到的温度,取决于所用空气的温度与湿度。作者把粮堆的变化情况比拟作受到不同温度和湿度支配的湿球温度计。对一个冷却过程的分析表明:湿球温度是测定供谷物通风气体冷却能力的良好依据。为供实际应用参考,本文提供一些图表及说明,以帮助选取风机的使用限值;并详细介绍了典型的湿球控制器及此方法之优点。 The temperature to which the grain stack can be cooled by airflow depends on the temperature and humidity of the air used. The author compares the changes in the grain heap to a wet-bulb thermometer that is subject to different temperatures and humidity. An analysis of a cooling process shows that wet bulb temperature is a good basis for determining the cooling capacity of a cereal ventilated gas. For practical application, this article provides some charts and instructions to help select the fan limit of use; and a detailed description of the typical wet ball controller and the advantages of this method.