摘要
采用有限元数值分析方法研究冷风温度和速度对小型包装箱内龙眼预冷过程的影响,探讨不同时间、不同空间位置的龙眼温度变化,并进行验证。结果表明:模拟值和实测值最大温差约为3.5℃,数值模拟可以较好的反映实验结果。研究发现,冷风速度约为1m/s时龙眼果实冷却速度较快能量损耗较少;冷风温度5℃、冷风速度1m/s时,包装箱内全部龙眼果实冷却到7/8冷却时间对应的温度8℃时所需最少时间约为35min。
Finite element analysis was used to simulate the effects of cool air temperature and velocity on the pre-cooling process of longan in a small packing box in order to explore the temperature profile of longan located at different space positions.The simulated data agreed with the experimental ones well.The biggest temperature difference between the simulated and the experimental data was around 3.5 ℃.When the cool air velocity used was 1 m/s,longan cooled rapidly and less energy was consumed and the 7/8 cooling time required was at least 35 min at 5 ℃ cool air temperature.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2010年第12期288-292,共5页
Food Science
关键词
龙眼
预冷
模型
数值模拟
longan
pre-cooling
model
numerical simulation
