龙眼压差通风预冷装置风速控制与能耗分析  

Air Velocity Control and Energy Analysis in Forced-air Pre-cooling Device of Longan

作　　者：闫国琦[1] 杨洲[1] 马征[2] 

机构地区：[1]华南农业大学南方农业机械与装备关键技术省部共建教育部重点实验室,广州510642 [2]惠州工业科技学校机电工程系,惠州516000

出　　处：《农业机械学报》2009年第3期125-129,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(30300210);广东省科技计划项目(2008B021200008)

摘　　要：针对龙眼的物理特性,设计了一套龙眼压差通风预冷试验装置。根据果蔬压差预冷7/8时间特性,通过试验得到了龙眼包装箱压差与风速关系以及异步电动机频率与风速关系。进一步研究龙眼压差预冷装置能耗与风速关系可知,对于龙眼果实,较小的风速预冷能耗较小,预冷时间较长;当预冷时间按要求设定时,在风机允许范围内控制风速按一定规律递增,直到龙眼终止温度,可以在设定时间内完成龙眼预冷,且能耗最小。According to the characteristics of longan,a forced-air pre-cooling device of longan for test was designed.Based on 7/8 time of pre-cooling,the relationship between air velocity and pressure drop or voltage frequency was obtained in test,and furthermore,the relationship between air velocity and energy was studied.The results show that the pre-cooling fan works more slowly,but costs a long time with a lower level of energy cost.In reality,a less time consuming method was needed.The method is controlling the increase of the air velocity with the decreased temperature of longan,the relationship between them was described,and the test proves the conclusion is reasonable.

关 键 词：龙眼 压差通风预冷 能耗 风速 变频调速 试验 

分 类 号：S667.2[农业科学—果树学] TS255.3[农业科学—园艺学]