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维持地铁车厢内颗粒物浓度低于35μg/m³的通风方法研究

Study on the Ventilation Method to Maintain the PM Concentration in a Subway Cabin below 35 μg/m.

作者信息

Choi Eun-Seo, Yook Se-Jin, Kim Minjeong, Park Duckshin

机构信息

School of Mechanical Engineering, Hanyang University, Seoul 04763, Korea.

Artificial Intelligence Railroad Research Department, Korea Railroad Research Institute, Uiwang-si 16105, Gyeonggi-do, Korea.

出版信息

Toxics. 2022 Sep 25;10(10):560. doi: 10.3390/toxics10100560.

DOI:10.3390/toxics10100560
PMID:36287841
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9612300/
Abstract

The city of Seoul will limit the maximum particulate matter (PM) concentration to ≤35 μg/m (from 2024). Herein, a numerical parametric study was conducted on the PM removal efficiency of the heating, ventilation, and air conditioning (HVAC) filters installed in the ceiling of subway cabins. The PM concentration distribution was explored according to the flow rate and flow rate ratio of the air introduced into the cabin. Under the current ventilation conditions of the subway train HVAC system, the PM concentration was highest in the cabin central area where exhaust outlets are located and decreased toward both ends of the cabin. The indoor airflow was improved and the PM concentration was reduced by increasing the flow rate of the supplied air at both ends of the cabin while decreasing it in the central area. It was found that the strengthened PM concentration criterion of Seoul can be met by increasing the ventilation flow rate to 700 CMH (currently, 500 CMH) and the filter efficiency to 85% (currently, 70%) while maintaining the current flow rate ratio. These results are expected to be used as important reference data for reducing the PM concentration in subway cabins and thereby improving indoor air quality.

摘要

首尔市将把颗粒物（PM）的最大浓度限制在≤35微克/立方米（从2024年起）。在此，针对安装在地铁车厢天花板上的供暖、通风与空调（HVAC）过滤器的PM去除效率开展了一项数值参数研究。根据引入车厢的空气流量和流量比，探究了PM浓度分布情况。在地铁列车HVAC系统当前的通风条件下，PM浓度在设有排气口的车厢中央区域最高，并朝着车厢两端降低。通过增加车厢两端的送风流量，同时减少中央区域的送风流量，改善了室内气流并降低了PM浓度。研究发现，在保持当前流量比的同时，将通风流量增加到700立方米每小时（当前为500立方米每小时），并将过滤器效率提高到85%（当前为70%），就能满足首尔加强后的PM浓度标准。这些结果有望用作降低地铁车厢内PM浓度从而改善室内空气质量的重要参考数据。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f060/9612300/708715a7cdb2/toxics-10-00560-g015.jpg
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