Yu, Yanzhe;
You, Shijun;
Zhang, Huan;
Wei, Shen;
Liu, Tianqi;
Guo, Xingguo;
Luo, Na;
(2025)
An empirical study estimating train-induced airflow rate and its effect on the cooling load of underground stations.
Journal of Building Engineering
, Article 112413. 10.1016/j.jobe.2025.112413.
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Abstract
Train-induced airflows (TIA) have a considerable effect on the thermal environment and cooling of underground metro stations (UMSs). However, there are limited studies specifically examining the relationship between train arrival time interval and TIA’s pattern, as well as the effect of TIA on the actual cooling load of UMSs. Therefore, this study aims to investigate the impact of TIA on the actual cooling load of UMSs using comprehensive measurements, which were designed to investigate the TIA’s volume caused by the arrival time interval and the corresponding calculation method. The results showed that the real-time airflow pattern of TIA is closely related to the arrival time interval. At measured stations, the flow rate curve of the superposition of airflows can be approximated into two types of waveforms according to three arrival time intervals, one is the waveform with a single peak and trough, and the other one is the waveform with double peaks and troughs, which present more waveforms than previous simulation studies. Moreover, this study presents an improved algorithm for calculating the cooling load caused by TIA and proves its reliability by tested data. According to the analysis, the cooling load caused by outdoor air volume occupies a larger proportion of the total load than that of tunnel air volume. The influence of air infiltration on the cooling load can be seriously underestimated when the engineering algorithm is used. This study provides reference data for ascertaining the characteristics of the TIA and the operation optimization of underground station cooling systems.
| Type: | Article |
|---|---|
| Title: | An empirical study estimating train-induced airflow rate and its effect on the cooling load of underground stations |
| DOI: | 10.1016/j.jobe.2025.112413 |
| Publisher version: | https://doi.org/10.1016/j.jobe.2025.112413 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Underground metro station, train-induced airflow, cooling load, thermal environment, field measurement |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10206376 |
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