基于三场耦合的脉冲电场杀菌系统的工作过程仿真

Simulation of Pulsed Electric Field Sterilization System Working Process Based on Three Coupled Fields

DOI：10.3969/j.issn.1673-1689.2012.09.010

中文关键词: 脉冲电场 温度分布 流体 处理室 三场耦合

英文关键词: beer foam proteins SDS-PAGE LC-MS/MS circular dichroism secondary structure

基金项目:江苏省科技创新计划项目(BY201020)

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中文摘要:

脉冲电场(Pulsed Electric Field,PEF)杀菌是将脉冲电压施加到处理室的两极,产生电场对食品物料进行杀菌的过程,在整个过程中,处理室中的电场强度与温度分布是影响系统杀菌效果以及食品质量的两个关键因素。作者在建立同场处理室的三维模型的基础上,根据电场、流场、温度场理论,建立了脉冲电场杀菌系统三场耦合的数学模型,模拟在脉冲电压V、脉宽τ、频率f、流速υ和温度T等条件下,NaCl溶液的流体特性、温度分布以及处理室中的电场分布,得出了同场处理室几何尺寸与温度和电场分布的关系,为优化处理室结构,改善杀菌效果提供重要依据。

英文摘要:

Pulsed electric field(PEF) for food sterilization is a process that pulsed voltage is applied to the food product,which is placed between or passed through two electrodes of the treatment chamber.During the process,the electric field strength and the temperature distribution in the treatment chamber are the two key factors affecting the system efficacy and food quality.This paper first developed a 3D model of the co-field treatment chamber,based on which developed a mathematical model of the three coupled fields according to the theory of the electric field,flow field and temperature field,and simulated the flow properties,temperature distribution of the liquid(Nacl solution) and electric field distribution in the treatment chamber under the conditions of pulse voltage V,pulse length τ,frequency f,flow rate v and temperature T.The simulation obtained the relationship between the geometry of the co-field treatment chamber and the temperature,electric field distribution.It also provides an important basis for optimizing the treatment structure and improving the sterilization effect.

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