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Analysis of an internal structure for refrigerated container: Improving distribution of cooling capacity
International Journal of Refrigeration ( IF 3.9 ) Pub Date : 2020-01-24 , DOI: 10.1016/j.ijrefrig.2020.01.023
Tao Jiang , Nanqin Xu , Baojun Luo , Le Deng , Shengli Wang , Qun Gao , Yongxiang Zhang

An improved internal structure is proposed to improve the distribution of cooling capacity in refrigerated container. Firstly, a computational fluid dynamics model was established and the fruit stacks was simplified to be porous medium. The flow resistance coefficient was obtained by combining theory and numerical simulation and then verified. Secondly, three baffles were added to reduce the loss of cold airflow by blocking the airflow through air-gaps. The velocity and temperature of the previous refrigerated container and the improved refrigerated container were obtained and compared. The cold airflow distribution in the improved refrigerated container is more uniform. The improvement of vertical velocity in all stacks is in the range of 5.24% – 425.04%. The cooling performance of the two refrigerated containers were also obtained. The variation of temperature distribution is within ±1 °C and the cooling time is also reduced by at least 22.9% in the improved refrigerated container. Finally, the proposed structure showed good applicability for different fruits and vegetables. For all produce tested, the decrease ratio of temperature rise in the improved refrigerated container relative to the previous refrigerated container ranges from 34.0% to 59.5%.



中文翻译:

冷藏集装箱内部结构分析:改善制冷量的分配

提出了一种改进的内部结构以改善冷藏容器中的冷却能力的分布。首先,建立了计算流体动力学模型,并将水果堆简化为多孔介质。理论与数值模拟相结合,得到了流阻系数,并进行了验证。其次,添加了三个导流板以通过阻止空气间隙中的气流来减少冷气流的损失。获得并比较了先前的冷藏容器和改进的冷藏容器的速度和温度。改进的冷藏容器中的冷气流分布更加均匀。所有烟囱中垂直速度的改善范围为5.24%– 425.04%。还获得了两个冷藏容器的冷却性能。在改进的冷藏容器中,温度分布的变化在±1°C范围内,冷却时间也至少减少了22.9%。最后,所提出的结构对不同的水果和蔬菜具有良好的适用性。对于所有测试的产品,相对于先前的冷藏容器,改进后的冷藏容器中温度升高的降低率在34.0%至59.5%之间。

更新日期:2020-03-04
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