Modified Atmosphere Container with Time‐Controlled Gas‐Diffusion Tube for Preserving Fresh Produce
Modified Atmosphere Container with Time‐Controlled Gas‐Diffusion Tube for Preserving Fresh Produce
复制标题
用于保存新鲜农产品的带有时间控制气体扩散管的气调容器
DOI：
10.1111/jfpe.12033
复制
发表时间：
2013
影响因子：
3
通讯作者：
D. Lee
中科院分区：
文献类型：
--
作者：
Min;D. An;D. Lee
提出了配备时间控制气体扩散管的新鲜农产品容器的概念，并测试了其在有益地改变容器内部气氛方面的有效性，从而保持了储存菠菜的质量。事实证明，尺寸适当的扩散管的时间控制关闭/打开对于获得气调 (MA) 非常有用，这有助于质量保存。从文献中采用并构建了容器中气体质量平衡的数学模型，考虑了通过塑料壁和管道的扩散气体通量、通过管道的对流液压气体流动并产生呼吸作用，以估计各种设计和操作变量下的气体成分，从而能够优化系统。循环时间不影响平衡时的平均容器气氛，但它确实影响气体成分的波动水平。菠菜容器气氛（即 O2 和 CO2 浓度）和独立控制变量（即管尺寸和封闭时间比率）之间的函数关系被制定并用于找到在最佳窗口中给出 MA 的容器设计。设计的原型容器能够给出与设计估计一致的最佳 MA，并提供比穿孔控制包更好的菠菜质量，从而验证了所提出的概念和模型。
实际应用
气体扩散管的时间控制打开是一种创新概念，可在新鲜农产品容器中获得所需的 MA。可以使用数学模型对适当尺寸的扩散管的时间控制打开/关闭进行编程，以获得有利于产品质量的 MA。通过本研究中给出的方法可以找到闭合时间比和管尺寸的适当组合，从而产生最佳的 O2 和 CO2 浓度气氛。使用所开发的概念可应用于可重复使用的容器或包装，以保持产品质量并延长产品供应链中的保质期。
The concept of a fresh produce container equipped with a time-controlled gas-diffusion tube was proposed and tested for its effectiveness at modifying the internal atmosphere of the container beneficially, thus preserving the quality of stored spinach. The time-controlled closing/opening of the properly dimensioned diffusion tube was shown to be useful in attaining a modified atmosphere (MA), which is helpful for quality preservation. A mathematical model of the mass balance of gases in the container, taking care of diffusive gas fluxes through the plastic wall and the tube, convective hydraulic gas flow through the tube and produce respiration, was adopted from the literature and constructed to estimate the gas composition under a variety of design and operation variables, enabling optimization of the system. Cycle time did not affect the averaged container atmosphere at equilibrium, but it did affect the fluctuation levels of the gas composition. Functional relationships between the spinach container atmosphere (i.e., O2 and CO2 concentrations) and independent control variables (i.e., tube dimensions and closed time ratio) were formulated and used to find a container design that gives an MA in the optimal window. A designed prototype container was able to give an optimal MA in agreement with design estimates and offer better spinach quality than the perforated control package, thus verifying the concept and model proposed.
Practical Applications
A time-controlled opening of gas-diffusion tube is an innovative concept to attain a desired MA in a fresh produce container. The time-controlled opening/closing of a properly dimensioned diffusion tube can be programmed using mathematical modeling to attain an MA that is conducive to the produce quality. Proper combination of the closed time ratio and tube dimension yielding the optimal atmosphere of O2 and CO2 concentrations can be found by the approach given in this study. Use of the developed concept can be applied to the reusable containers or packages keeping the product quality and extending the shelf life in the produce supply chain.