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Experimental and numerical investigation of TVOC concentrations and ventilation dilution in enclosed train cabin
Air pollution in trains is an important factor threatening human health, which has attracted more and more attention in the worldwide public health researches. In this study, one cabin of a fully enclosed train was taken as an example to conduct experimental and numerical research on pollution level...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Tsinghua University Press
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8432275/ https://www.ncbi.nlm.nih.gov/pubmed/34522289 http://dx.doi.org/10.1007/s12273-021-0827-2 |
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author | Zhao, Le Zhou, Huang Jin, Yuzhen Li, Zeqing |
author_facet | Zhao, Le Zhou, Huang Jin, Yuzhen Li, Zeqing |
author_sort | Zhao, Le |
collection | PubMed |
description | Air pollution in trains is an important factor threatening human health, which has attracted more and more attention in the worldwide public health researches. In this study, one cabin of a fully enclosed train was taken as an example to conduct experimental and numerical research on pollution level and distribution characteristic of total volatile organic compound (TVOC). The results show that when the average emission rate under daily environmental conditions was taken as the reference, TVOC concentration in the cabin exceeded the limit level of Chinese Indoor Air Quality Standard by more than 4 times. The obvious pollutants accumulative phenomenon could be found at bottoms and corners under the action of airflow. Setting air inlets at the roof of the train, mean age of air ranged from 30 s to 50 s in the breathing area. The concentration of pollutants was the lowest at 2.5–5 m from the center point of the cabin structure, and the ventilation efficiency was the highest. The introduction of clean fresh air could effectively eliminate pollutants. When the complete displacement ventilation rates were 51.4 h(−1) and 28.6 h(−1), the removal efficiency of pollutants was about 0.85 and 0.48 mg/m(3) per minute, respectively. This study was helpful to the improvement and optimization design of air quality and ventilation mode in trains. |
format | Online Article Text |
id | pubmed-8432275 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Tsinghua University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-84322752021-09-10 Experimental and numerical investigation of TVOC concentrations and ventilation dilution in enclosed train cabin Zhao, Le Zhou, Huang Jin, Yuzhen Li, Zeqing Build Simul Research Article Air pollution in trains is an important factor threatening human health, which has attracted more and more attention in the worldwide public health researches. In this study, one cabin of a fully enclosed train was taken as an example to conduct experimental and numerical research on pollution level and distribution characteristic of total volatile organic compound (TVOC). The results show that when the average emission rate under daily environmental conditions was taken as the reference, TVOC concentration in the cabin exceeded the limit level of Chinese Indoor Air Quality Standard by more than 4 times. The obvious pollutants accumulative phenomenon could be found at bottoms and corners under the action of airflow. Setting air inlets at the roof of the train, mean age of air ranged from 30 s to 50 s in the breathing area. The concentration of pollutants was the lowest at 2.5–5 m from the center point of the cabin structure, and the ventilation efficiency was the highest. The introduction of clean fresh air could effectively eliminate pollutants. When the complete displacement ventilation rates were 51.4 h(−1) and 28.6 h(−1), the removal efficiency of pollutants was about 0.85 and 0.48 mg/m(3) per minute, respectively. This study was helpful to the improvement and optimization design of air quality and ventilation mode in trains. Tsinghua University Press 2021-09-10 2022 /pmc/articles/PMC8432275/ /pubmed/34522289 http://dx.doi.org/10.1007/s12273-021-0827-2 Text en © Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021 This article is made available via the PMC Open Access Subset for unrestricted research re-use and secondary analysis in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the World Health Organization (WHO) declaration of COVID-19 as a global pandemic. |
spellingShingle | Research Article Zhao, Le Zhou, Huang Jin, Yuzhen Li, Zeqing Experimental and numerical investigation of TVOC concentrations and ventilation dilution in enclosed train cabin |
title | Experimental and numerical investigation of TVOC concentrations and ventilation dilution in enclosed train cabin |
title_full | Experimental and numerical investigation of TVOC concentrations and ventilation dilution in enclosed train cabin |
title_fullStr | Experimental and numerical investigation of TVOC concentrations and ventilation dilution in enclosed train cabin |
title_full_unstemmed | Experimental and numerical investigation of TVOC concentrations and ventilation dilution in enclosed train cabin |
title_short | Experimental and numerical investigation of TVOC concentrations and ventilation dilution in enclosed train cabin |
title_sort | experimental and numerical investigation of tvoc concentrations and ventilation dilution in enclosed train cabin |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8432275/ https://www.ncbi.nlm.nih.gov/pubmed/34522289 http://dx.doi.org/10.1007/s12273-021-0827-2 |
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