荷兰豆气调保鲜实验及其传热传质研究

发布时间：2018-04-21 22:27

本文选题：荷兰豆 + 气调　；参考：《哈尔滨商业大学》2017年硕士论文

【摘要】：以荷兰豆为实验材料,研究气调保鲜过程中的传热传质,讨论贮藏过程中各项因素的对贮藏效果的影响。气调保鲜贮藏具有很多优点,有效延长货架期,结合真空预冷降温迅速,贮藏效果好。在实验和模拟的基础上,结合文献,讨论最适宜的贮藏温度,气体体积配比等因素。简述贮藏技术的国内外发展现状的基础,简要介绍了气调保鲜的原理和方法,分析了影响气调贮藏的主要参数:温度、气体浓度,在实验的基础上分析在不同的因素对贮藏过程对冷却以及贮藏效果的不同影响程度,从而找出不同阶段的主要的因素,为指导实践奠定基础。从理论上分析了在气调保鲜贮藏的条件下,荷兰豆表面、内部的水分和温度的变化规律,并在实验的基础上建立初步的物理模型和数学模型。采用数值计算方法,编程对冷却过程进行理论模拟计算,求出果蔬表面和中心温度的变化情况;并用有限元软件ANSYS对整个冷却过程进行了直观的模拟表示,并分析两者的结果进行对比。根据实验数据,分析不同的贮藏条件下的贮藏效果,温度、体积配比等因素对呼吸速度、失重率、腐烂率等方面的影响,最后得出荷兰豆在气调贮藏条件下的合理的贮藏参数。
[Abstract]:The heat and mass transfer during the atmosphere controlled preservation was studied with Dutch bean as the experimental material, and the effects of various factors during storage on the storage effect were discussed. Controlled atmosphere storage has many advantages, such as extending shelf life effectively, cooling quickly with vacuum precooling, and good storage effect. On the basis of experiment and simulation, combined with literature, the most suitable storage temperature, gas volume ratio and other factors are discussed. This paper briefly describes the development of storage technology at home and abroad, briefly introduces the principle and method of controlled atmosphere preservation, and analyzes the main parameters that affect the storage of controlled atmosphere: temperature, gas concentration, etc. On the basis of experiments, this paper analyzes the different degrees of influence of different factors on the cooling and storage effect of storage process, and finds out the main factors in different stages, which lays a foundation for guiding practice. The changes of moisture and temperature on the surface and inside of Dutch beans were analyzed theoretically under the condition of controlled atmosphere preservation and storage. Based on the experiments, a preliminary physical and mathematical model was established. The surface and center temperature of fruits and vegetables are calculated by using numerical method, and the cooling process is simulated by programming, and the whole cooling process is represented intuitively by the finite element software ANSYS. The results are compared with each other. According to the experimental data, the effects of storage effect, temperature and volume ratio on respiration rate, weight loss rate and decay rate were analyzed. Finally, the reasonable storage parameters of Dutch beans under controlled atmosphere storage were obtained.
【学位授予单位】：哈尔滨商业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TS214.9

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