Abstract：
This study focused into vacuum freeze dryer technology for increasing food shelf life in a drying food technology. The determinants of energy consumption increase as the energy density of food production and storage increases. Reducing the amount of energy used for drying, freezing, chilling, refrigeration, and air conditioning is becoming more important. The objective of this study was to extend food\'s shelf life utilizing creative and novel technical approaches, such as vacuum freeze-drying\'s energy-efficient process. Despite being a part of this investigation, the vacuum freeze drier was created using environmentally benign energy sources. To minimize the carbon footprint of food preservation, it is essential to use eco-friendly energy sources in chilling storage. According to the first law of thermodynamics, the energy efficiency at 1 atm pressure and 25 [°C] temperature (neglecting potential and kinetic energies) in the dead state is calculated under thermal equilibrium conditions. In this study, the energy efficiency was shown according to 5 different scenarios. The results of energy efficiencies are as follows: η1 is from 14.3 to 21.4%, η2 is from 20.7 to 31.0%, η3 is from 27.3 to 40.9%, η4 is from 32.1 to 48.1%, and η5 is from 34.6 to 51.9%, respectively. This analysis demonstrates that the energy efficiency improved from 12 to 18 h. In this study, optimizations with scenarios were employed considering vacuum freeze-drying technology in the plant with sustainable energy sources can considerably improve food shelf life while limiting our environmental impact.
摘要：
这项研究的重点是真空冷冻干燥技术，以提高食品干燥技术中的食品保质期。能源消耗的决定因素随着食品生产和储存能量密度的增加而增加。减少用于干燥的能量，冻结,令人不寒而栗，制冷,空调变得越来越重要。本研究的目的是利用创造性和新颖的技术方法延长食品的保质期，如真空冷冻干燥的节能工艺。尽管是这次调查的一部分,真空冷冻干燥机是使用环保能源制造的。为了最大限度地减少食品保鲜的碳足迹，在冷藏中使用环保能源至关重要。根据热力学第一定律,在热平衡条件下，计算死区状态下1atm压力和25[°C]温度（忽略势能和动能）下的能量效率。在这项研究中,根据5种不同的情况显示了能源效率。能源效率的结果如下：η1为14.3至21.4%，η2为20.7%至31.0%，η3为27.3%至40.9%，η4为32.1％至48.1％，η5为34.6％至51.9％，分别。此分析表明，能源效率从12小时提高到18小时。在这项研究中，考虑到具有可持续能源的工厂中的真空冷冻干燥技术可以显着提高食品的保质期，同时限制我们对环境的影响。
