Dynamic Variation Characteristics and Influential Factors of PM2.5 in Subway Platforms Under Air-conditioning Condition

Wang Lihui; Hu Tianwei; Zhang Jihua; Liu Jun; Zheng Yi; Song Jie; Pan Jun; Yang Jun; Fan Zier

doi:10.3969/j.issn.0253-4339.2019.05.073

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Dynamic Variation Characteristics and Influential Factors of PM2.5 in Subway Platforms Under Air-conditioning Condition

更新时间：2024-07-18

- Dynamic Variation Characteristics and Influential Factors of PM2.5 in Subway Platforms Under Air-conditioning Condition
- Journal of Refrigeration Vol. 40, Issue 5, (2019)
- 作者机构：
  
  1. 上海理工大学
  2. 上海申通地铁集团有限公司技术中心
  3. 上海市环境检测中心
  4. 上海安合环境检测技术有限公司
  5. 华东师范大学第二附属中学
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0253-4339.2019.05.073
  CLC：
- Published：2019
- 稿件说明：
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Wang Lihui, Hu Tianwei, Zhang Jihua, et al. Dynamic Variation Characteristics and Influential Factors of PM2.5 in Subway Platforms Under Air-conditioning Condition[J]. Journal of refrigeration, 2019, 40(5).
DOI：

Wang Lihui, Hu Tianwei, Zhang Jihua, et al. Dynamic Variation Characteristics and Influential Factors of PM2.5 in Subway Platforms Under Air-conditioning Condition[J]. Journal of refrigeration, 2019, 40(5). DOI： 10.3969/j.issn.0253-4339.2019.05.073.

摘要

本文以空调工况下地铁站台区域PM值为研究对象，采用现场动态监测的方法，对上海某地铁车站站台1.5m高度典型代表点及站台典型送风口和回风口处、屏蔽门附近、楼梯处和新风井区域的PM值和温湿度值进行动态监测，获得站台及其相关因素PM值的动态变化特性。结果表明：送风口平均PM值比站台平均PM值高25 μg/m3，站台屏蔽门附近处平均PM值比站台平均PM值高50 μg/m3。本文还利用CFD软件进行数值模拟，并通过正交试验数学方法分析各因素对站台PM浓度影响的显著性，结果表明：送风口PM和屏蔽门PM对站台PM值影响非常显著，送风口风速和回风口风速对站台PM值影响显著，送风温度、屏蔽门处温度和站台温度对站台PM值影响不显著。

Abstract

This study investigated some of the major factors influencing subway PM pollutants under air-conditioning conditions through field measurements and CFD simulations on a Shanghai subway station. Based on the principle of the air-conditioning system

the particle concentrations at the air supply outlet

return air outlet and the screen door creates a direct impact on particle concentration of the platform. Dust accumulation at the fresh air shaft is found to be a secondary dusting action when the fresh air is supplied

which leads to ahigher particle concentration in the subway station than that in outdoor air. Each factor’s influence on the platform particle concentration was analyzed through the orthogonal test. Results confirmed that the particle concentrations at air outlet and platform screen door

along with the supply air and return air velocity

significantly influenced theparticle concentration at platform; while the temperature ofsupplyair

platform screen door and the platform has little impacts on the particle concentration at platform.

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