摘要
为了提高食品冻结率和降低能耗,本文针对自堆积式螺旋速冻装置中的两个关键部件,螺旋塔和平直翅片管式换热器,进行了物理建模,并详细介绍了仿真分析中所有边界条件设定,采用标准的k-ε湍流模型,利用Fluent软件对螺旋塔冻结速度和冻结均匀性进行求解。最后分别对螺旋塔的出口风速和冻品中心温度进行了现场测试,试验结果表明计算值与试验值误差较小,验证了本文物理模型的正确性。本文的研究内容可为螺旋速冻装置的后期研究提供有效的参考。
In order to improve the food freezing rate and reduce energy consumption,two main components of the self-stacking spiral quick freezer,the spiral tower and the flat finned tube heat exchanger,are taken into consideration in this paper.Firstly,the physical models of the two components are established.And the boundary conditions in the simulation analysis are introduced in detail.Then the standard k-εturbulence model is adopted to calculate the freezing velocity and freezing uniformity of the spiral tower in the Fluent environment.Finally,the outlet wind speed and the core temperature of the frozen products are tested,respectively.The experimental results show that the error between the calculated value and the experimental value is small.The physical model established in this paper is reasonable and feasible.The research of this paper can provide effective reference for the later research of spiral quick-freezing device.
作者
洪琳
朱必佳
孙宇
Hong Lin;Zhu Bijia;Sun Yu(School of Mechanical Engineering,Nanjing University of Science & Technology,Nanjing 210094,China)
出处
《包装与食品机械》
CAS
北大核心
2019年第1期40-43,共4页
Packaging and Food Machinery
关键词
螺旋速冻装置
螺旋塔
换热器
物理模型
spiral quick freezer
spiral tower
heat exchanger
physical model
