流态化速冻装置的优化设计  

Optimal Design on Fluidized Quick-freezing Device

作　　者：金斌辉 莫凡 宋晓燕[1] 刘宝林[1] JIN Bin-hui;MO Fan;SONG Xiao-yan;LIU Bao-lin(Institute of Biothermal and Technology,University of Shanghai for Science and Technology,Shanghai 200093,China;School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学生物系统热科学研究所,上海200093 [2]上海理工大学能源与动力工程学院,上海200093

出　　处：《包装工程》2022年第13期117-123,共7页Packaging Engineering

基　　金：国家重点研发计划(2017YFD0400404)。

摘　　要：目的研究常见流态化速冻机的性能、冷冻效果,以改善因冻结不均匀引起的冷量浪费现象。方法采用实验与数值分析相结合的方法,研究导流板的位置和角度对冷冻效果的影响,找到相对最佳的设计方案,并对优化前后的流态化速冻机进行实验验证。结果导流板均匀性的最佳位置组合是导流板1在0.23 m处,角度呈45°,导流板2在0.095 m处,角度呈25°。装置经优化后,同一时间不同点的温差缩小了约50%。优化后速冻室温度降到−35℃时需要的时间减少了约3.5 min;冻结菇娘果的时间缩短了6.2%;机器空载预冷的电量节约了14.2%;菇娘果冻结所需的耗电量节约了33%。结论优化后机器的气流均匀性得到了改善,并有较好的节能效果。The paper aims to improve the waste of cooling capacity and decline of freezing quality caused by uneven freezing by studying the performance and freezing effect of the common fluidization quick freezer.In this paper,combi-nation of experiment and numerical analysis is used to optimize the energy-saving design of fluidized freezers that are common on the market.By studying the influence of the position and angle of the deflector on the freezing effect,the best design plan for the deflector is found,then fluidization quick freezer before and after optimization is verified by experi-ments.The position combined with the best uniformity is that the deflector 1 at 0.23 m with 45°and the deflector 20.095 m with 25°.The optimized machine has better cooling uniformity,and the temperature drop at different points at the same time is reduced by about 50%.The time required for the optimized machine to drop to−35°C is about 3.5 minutes less than it for the previous machine to this temperature.Compared with the machine before optimization,the freezing time of a batch Downy Groundcherry has been shortened by 6.2%;the power consumption of no-loaded machine's temperature required for pre-cooling has been saved 14.2%;the power consumption of freezing a batch Downy Groundcherry has been saved 33%.The optimized air flow uniformity of the machine has been improved and energy saving has been achieved.

关 键 词：流态化 节能 导流板 数值模拟 气流均匀性 

分 类 号：TS205.7[轻工技术与工程—食品科学]