摘要
为了解浅圆仓玉米储藏全年的粮堆温度变化规律,采用实仓调查的方法分析了广东地区一浅圆仓玉米入仓后第一年粮温在垂直方向和水平剖面上的变化,并通过温差和露点评估了粮堆表层的结露风险。结果表明:在垂直方向上,粮面下5 m范围内粮食受夏秋季太阳热辐射影响,温度超过20℃的时间在2个月以上,空调控温工艺能将仓温和表层粮温有效降低至25℃及以下,但在秋季空调关闭后,粮面下9 m范围的粮温有不同程度反弹升高;在水平剖面上,内外圈温差明显,温差大小受粮层深度和季节影响,同时受仓体周围遮挡物影响,阳光直射多的方向粮温高于其他方向;粮堆表层内圈范围在空调控温前结露风险较高。
In order to understand the regularity for change of grain mass temperature in the whole year of corn storage in squat silo, the method of actual survey was used to analyze the grain temperature distribution of corn grain mass in vertical direction and horizontal section in a squat silo in Guangdong. And based on the temperature difference and dew point, the risk of condensation on the surface was evaluated. The results indicated that in the vertical direction, due to the influence of solar thermal radiation in summer and autumn, the time for the grain temperature to exceed 20 ℃ within 5 meters below the grain surface was more than two months, and the use of air-conditioning temperature control technology could effectively reduce the temperature of the warehouse and surface grains to 25 ℃ and below. However, after the air conditioner was turned off in autumn, grain temperature in the range of 9 meter below grain surface increased to varying degrees. In the horizontal section, the temperature difference between the inner and outer circles was obvious, affected by the depth of the grain layer and the season. At the same time, in different directions, the temperature in the direction without obstructions around the silo body was higher. There was a higher risk of condensation in the inner circle of the grain mass surface before air-conditioning temperature control technology.
作者
田琳
张海洋
谢维治
李松伟
祁智慧
唐芳
Tian Lin;Zhang Haiyang;Xie Weizhi;Li Songwei;Qi Zhihui;Tang Fang(Academy of National Food and Strategic Reserves Administration,National Engineering Research Center for Grain Storage and Transportation,Beijing 100037;Dongguan Direct Depot of Guangdong Grain Reserve Management Corporation,Dongguan 523145)
出处
《中国粮油学报》
CAS
CSCD
北大核心
2023年第2期7-13,共7页
Journal of the Chinese Cereals and Oils Association
基金
国家粮食和物资储备局科学研究院基本科研业务费专项课题(JY 2009)。
关键词
浅圆仓
玉米粮堆
温度分布
结露风险
squat silo
corn grain mass
temperature distribution
condensation risk
