地铁站室内空气品质研究

发布时间：2018-04-08 07:36

本文选题：地铁站　切入点：活塞风　出处：《南京理工大学》2015年硕士论文

【摘要】：地铁作为一种快速便捷的交通方式在我国得到了飞速的发展,并且承担了城市很大一部分公共交通客流。随着地铁成为人们主要出行工具,人们在地铁车站内停留时间也随之增加,地铁车站室内环境是否会对人体产生不良健康影响已经引起了国内外专家学者的广泛关注。本文主要对地铁系统地铁站室内空气品质问题进行了研究。选取某典型地铁站在春、夏季进行空气品质方面(如温度、相对湿度、细菌浓度、可吸入颗粒物浓度等)现场测试。探究了室内空气品质的影响因素。考虑到实验方法的局限性,为了得到房间内空气各种物理量的详细分布情况,建立三维地铁岛式站台模型,对室内空气气流组织进行数值模拟计算,着重计算了“空气龄”及室内空气细菌浓度的分布,讨论了有无“活塞风”情况对室内空气品质的影响。结合实验结果与数值模拟结果,论文给出了地铁环控系统的优化方案。并利用数值模拟方法计算了优化方案对室内空气品质的改善效果。通过研究,夏季地铁站室内细菌浓度较高；“活塞风”效应对站台室内空气品质的影响很大：列车进站时,“活塞风”成为影响室内空气品质的主要因素,能有效改善地铁站内细菌浓度以及空气龄；地铁站台层、站厅层、室外之间有明显的差异；室内细菌浓度与颗粒物浓度与室外无明显相关性；站台层楼梯结构对于室内空气流场影响较大：在无列车进站情况下,两楼梯之间空气龄与细菌浓度均偏高。
[Abstract]:As a fast and convenient way of transportation, subway has been developing rapidly in our country, and it has taken on a large part of the public traffic in the city.As subway has become the main means of travel, people in the subway station also increased the length of stay in the subway station indoor environment will have adverse health effects on the human body has attracted extensive attention of experts and scholars at home and abroad.In this paper, the problem of indoor air quality in subway stations is studied.A typical subway station was selected to test air quality in spring and summer (such as temperature, relative humidity, bacterial concentration, respirable particle concentration, etc.).The influencing factors of indoor air quality were investigated.In view of the limitation of the experimental method, in order to obtain the detailed distribution of various physical quantities of air in the room, a three-dimensional subway island platform model is established, and the numerical simulation of indoor air distribution is carried out.The distribution of "air age" and bacterial concentration in indoor air is emphatically calculated, and the influence of "piston wind" on indoor air quality is discussed.Based on the experimental results and numerical simulation results, the optimization scheme of metro environmental control system is presented in this paper.The effect of the optimization scheme on indoor air quality was calculated by numerical simulation.The results show that the concentration of bacteria in subway station is high in summer, the effect of "piston wind" has great influence on indoor air quality of platform: when the train enters the station, "piston wind" becomes the main factor affecting indoor air quality.It can effectively improve the concentration of bacteria and the age of air in subway station, there is obvious difference between station floor, station floor and outdoor, but there is no significant correlation between indoor bacterial concentration and particulate concentration.The stair structure of platform has a great influence on the indoor air flow field: in the case of no train entering station, the air age and bacterial concentration between the two staircases are higher.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU962

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