种薯贮藏室内环境温湿度测试与数值模拟

发布时间：2018-04-27 20:32

本文选题：马铃薯贮藏 + 半地下式　；参考：《内蒙古农业大学》2017年硕士论文

【摘要】：马铃薯是一种宜菜、宜粮的茄科植物,因富含淀粉、蛋白质、膳食纤维、维生素、矿物质等而弥补了大米、小麦等主粮的缺陷,成为仅次于玉米、水稻和小麦的第4大粮食作物。马铃薯收获后不是短时间内消费完的,而是通过市场需求来慢慢供应,且因需求不同而其贮藏条件也不同,例如:种薯温度以2～4℃为宜,工业加工薯3～5℃为宜,使用薯0～3℃为宜。并且收获后仍然是一个活体,新陈代谢继续进行,因此马铃薯贮藏是极为重要环节。本试验选取以贮藏马铃薯种子为主的呼和浩特市内蒙古农业大学农学院试验基地半地下式贮藏室为研究对象,选用成前科技DWRF-B温湿度传感器进行布点测试,以太网web版远程监控平台数据采集。再以泰仕电子工业股份有限公司的温湿度非色散式二氧化碳测试计TES-1370对成前科技DWRF-B温湿度传感器进行标定,确保测试数据的精确性和可靠性。最后,结合测试数据进行CFD数值模拟。研究结果表明,虽然室外天气变化剧烈且昼夜温差大,但是马铃薯贮藏室内北墙体附近温度环境处于基本稳定状态。贮藏初期马铃薯贮藏室内温度比种薯适宜温度高,而贮藏后期贮藏室内温度比种薯适宜温度低。并且种薯堆放位置与北墙体具有一定距离。基于流体力学的方法,利用Fluent软件建立贮藏室计算流体力学模型,模拟研究后得出贮藏室内主要能源来自于贮藏室内地表面,北墙体和顶墙体附近温度为最低,顶墙和北墙两个通风口主要以通风换热为主。并与实测值对比,验证了模型的正确性以及模拟方法的可行性。对其贮藏室通风口尺寸不同时模拟研究贮藏室内温湿度分布,得出贮藏室通风口尺寸对贮藏室内温湿度影响较显著,可以通过改变通风口尺寸来调节贮藏室内温湿度。
[Abstract]:Potato is a suitable vegetable, suitable for food plants, because of rich starch, protein, dietary fiber, vitamins, minerals and so on to make up for rice, wheat and other major grain defects, after corn, rice and wheat, the fourth major food crops. After the harvest is not a short time, but through the market demand to slowly supply. The storage conditions are different because of the different demand, such as the suitable temperature of 2~4 centigrade, 3~5 C for industrial sweet potato, 0~3 C for using sweet potato. And it is still a living body after harvest, and the metabolism continues to carry on. Therefore, the storage of potato is a very important link. And the research object of the semi underground storage room of the experimental base of the Agricultural College of the Inner Mongolia Agricultural University in hatht City, we choose the DWRF-B temperature and humidity sensor for the pre formed science and technology, and the data collection of the remote monitoring platform of the Ethernet web version. Then, the temperature humidity non dispersive carbon dioxide tester TES-1370 of the Costar Electronics Inc is formed. The temperature and humidity sensor of DWRF-B was calibrated to ensure the accuracy and reliability of the test data. Finally, the CFD numerical simulation was carried out with the test data. The results showed that the temperature environment near the north wall of the potato storage room was basically stable although the outdoor weather changed violently and the temperature difference was large in the day and night. The temperature in the storage room of the bell potato is higher than that of the seed potato, and the temperature of the storage room is lower than that of the seed. And the storage location of the seed sweet potato has a certain distance from the north wall. Based on the method of fluid mechanics, the Fluent software is used to establish the computational fluid dynamics model of the storage room, and the main energy sources in the storage room are obtained after the simulation. At the surface of the interior of the storage room, the temperature near the north wall and the top wall is the lowest, the two air vents of the top wall and the north wall are mainly ventilated and heat transfer mainly. And compared with the measured values, the correctness of the model and the feasibility of the simulation method are verified. The size of the air vent has a significant effect on the temperature and humidity of the storage room, and the temperature and humidity of the storage room can be adjusted by changing the size of the vent.

【学位授予单位】：内蒙古农业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：S532

【参考文献】