单元式果蔬压差预冷设备速度场的数值模拟  

Numerical Simulation of the Velocity Field of the Unit Forced-air Precooling Equipment for Fruits and Vegetables

作　　者：刘方然 郭风军 刘玉岭 张长峰 Liu Fangran;Guo Fengjun;Liu Yuling;Zhang Changfeng(Shandong Key Laboratory of Storage and Transportation Technology of Agricultural Products,Jinan,250103,China;National Engineering Research Center for Agricultural Products Logistics,Jinan,250103,China;Institute of Refrigeration and Cryogenics Engineering,University of Shanghai for Science and Technology,Shanghai,200093,China;Yantai Ruijia Energy Saving Technology Co.Ltd.,Yantai,264002,China)

机构地区：[1]山东省农产品贮运保鲜技术重点实验室,济南250103 [2]国家农产品现代物流工程技术研究中心,济南250103 [3]上海理工大学制冷与低温工程研究所,上海200093 [4]烟台睿加节能科技有限公司,烟台264002

出　　处：《冷藏技术》2023年第1期29-35,共7页Journal of Refrigeration Technology

摘　　要：本文采用数值模拟的方法对当前两种主要的可移动式压差预冷装置(“U”型可移动式压差预冷一体装置和“回”型可移动式压差预冷一体装置)的速度场进行模拟,揭示并分析其流场的均匀性问题。结果表明:对于“U”型压差预冷设备,靠近回风口处穿过果蔬的平均风速可达2.5 m/s,当距回风口大于2 m时,穿过果蔬的平均风速低于0.55 m/s,预冷不均匀;而对于“回”型压差预冷设备货物区的最高风速为0.94 m/s,最低风速为0.53 m/s,预冷较为均匀。In this paper,the method of numerical simulation was adopted to simulate the velocity field of the two main types of movable forced-air precooling equipment(“U”type movable forced-air precooling integrated device and“Rectangular Shape”type movable forced-air precooling integrated device)to reveal and analyze the uniformity of the flow field.The results showed that the precooling effect of the“U”type forced-air precooling integrated device was uneven.The average wind speed passing through the fruits and vegetables near the return air inlet reached 2.5 m/s,while the average wind speed passing through the fruits and vegetables was less than 0.55 m/s,when the distance from the return air inlet was more than 2 m.Compared with“U”type movable forced-air precooling integrated device,“Rectangular Shape”type movable forced-air precooling integrated device is relatively uniform.The maximum wind speed through fruits and vegetables is 0.94 m/s,and the minimum wind speed is 0.53 m/s.

关 键 词：压差预冷 可移动式 数值模拟 

分 类 号：TS255.3[轻工技术与工程—农产品加工及贮藏工程]