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Train-Induced Unsteady Airflow (TIUA) Characteristics in Subway Ventilation Network

  • Xin Zhang
  • Jiangyan Ma
  • Angui LiEmail author
Conference paper
  • 235 Downloads
Part of the Environmental Science and Engineering book series (ESE)

Abstract

Nowadays, subway is rapidly developing globally; meanwhile, it costs huge energy. Train-induced unsteady airflow (TIUA) takes a crucial influence on the environment and energy consumption of subway. In the present study, 1D simulation was conducted using IDA tunnel software to analyze the TIUA characteristics of various components in subway ventilation network, such as platform, piston vent shaft, and bypass duct. The results demonstrate that the platform had the diverging and converging effect on the TIUA, and the converging effect was more outstanding with the piston vent shafts and bypass ducts closed condition. Moreover, bypass ducts at the upstream tunnel of subway stations mainly exerted a diverging effect on the TIUA, whose time-average diverging coefficients were approximately 0.16. In addition, piston vent shafts and bypass ducts at the downstream tunnel primarily took a converging effect on the TIUA; the time-average converging coefficients of the piston vent shaft were approximately 0.18 with the bypass ducts open and approximately 0.29 with the bypass ducts closed, respectively; and the time-average converging coefficients of the bypass duct were approximately 0.40. In addition, this study will provide meaningful design guidance for designer and enormous energy-conservation potential for subways.

Keywords

Train-induced unsteady airflow Subway ventilation network Time-average diverging coefficient Time-average converging coefficient 

Notes

Acknowledgements

This research was funded by the National Natural Science Foundation of China (Grant No. 51478377). Moreover, the support from China Railway First Survey and Design Institute Group Ltd., should be greatly appreciated.

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Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.School of Building Services Science and EngineeringXi’an University of Architecture and TechnologyXi’anChina
  2. 2.China Railway First Survey and Design Institute Group LTDXi’anChina

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