食品科学 ›› 2010, Vol. 31 ›› Issue (12): 288-292.doi: 10.7506/spkx1002-6630-201012067

• 包装贮运 • 上一篇    下一篇

小型包装箱内龙眼果实预冷过程数值模拟研究

孟志锋1,沈五雄1,向 红1,扬 洲2,周家华1 ,*   

  1. 1.华南农业大学食品学院 2.华南农业大学工程学院
  • 收稿日期:2009-09-27 出版日期:2010-06-15 发布日期:2010-12-29
  • 通讯作者: 周家华 E-mail:jiahuazhou@scau.edu.cn

Numerical Simulation of Pre-cooling Process of Longan in Small Packing Box

MENG Zhi-feng1,SHEN Wu-xiong1,XIANG Hong1,YANG Zhou2,ZHOU Jia-hua1,*   

  1. 1. College of Food Science, South China Agricultural University, Guangzhou 510642, China;
    2. College of Engineering, South China Agricultural University, Guangzhou 510642, China
  • Received:2009-09-27 Online:2010-06-15 Published:2010-12-29
  • Contact: ZHOU Jia-hua E-mail:jiahuazhou@scau.edu.cn

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。

关键词: 龙眼, 预冷, 模型, 数值模拟

Abstract:

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.

Key words: longan, pre-cooling, model, numerical simulation

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