论文部分内容阅读
1 原理 储粮气流理论指出,所有粮堆中都存在气流,且气流运动的方向与粮温、环境气温之间的温差有着密切的关系。当粮温高于环境气温2~3℃时为正温差粮,能稳定地显示出高温气流的上升运动;粮温低于环境气温2~3℃时为负温差粮,能稳定地显示出低温气流的下沉运动;温差在±2~3℃时为中温粮,这时气流
1 Principle Grain flow theory indicates that there is air flow in all grain piles and the direction of air flow is closely related to the temperature difference between grain temperature and ambient temperature. When the grain temperature is higher than the ambient temperature 2 ~ 3 ℃ for the positive temperature difference grain, can stably show the rising movement of high temperature airflow; grain temperature is lower than the ambient temperature of 2 ~ 3 ℃ negative temperature differential grain, can stably show low temperature Airflow sinking movement; temperature difference of ± 2 ~ 3 ℃ in the temperature grain, then air