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Department of Mining and Metallurgical Engineering, Engineering College, Assiut University, Assiut, Egypt
Due to the problem of lacking enough fresh air for passengers in underground metro stations, increasing attention has been paid to improving ventilation in underground metro stations. In this paper, the distribution characteristics of airflow fields, geometry of the station, and the influence of airflow rate changes on passengers’ ventilation conditions have been investigated and simulated according to computational fluid dynamics (CFD) theory. In addition, the volume of the stations was treated with a central air conditioning system, including several air handling units (AHU) connected to chilled water. Air flow for trains and stations has been calculated and compared with the actual data of the National Authority for Tunnels (NAT). It has been found that the highest air flow rate Q for Attaba station is 24.97 m3/s at ticket hall level, and the lowest air flow rate is 5.23 m3/s at platform level. Also, the required air flow rate is 111.02 m3/s for trains has been calculated. This value is acceptable and suitable in comparison to the actual results from the NAT. This is to reduce the necessary heat and improve the air quality inside underground metro stations. It is concluded that, in cases where an air flow rate is required in stations, the efficiency of the fans must be superior to 70%. The rotation speed of the fans will range from 750 to 1480 revolutions per minute (r.p.m).
Computational Fluid Dynamics (CFD), Air Flow Rate, Stations, Air Treatment and Improvement
Mohamed Abuelkassem Mohamed, Elseman Ibrahim Abdelrasoul, Sayed Ramadan Hamed. (2023). CFD Application to Estimate Air Flow Rate for Normal Ventilation in Metro Trains and Stations. American Journal of Science, Engineering and Technology, 8(4), 226-234. https://doi.org/10.11648/j.ajset.20230804.18
Copyright © 2023 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
|1.||Kurnia, J. C., Sasmito, A. P., and A. S. Mujumdar. Simulation of a novel intermittent ventilation system for underground mines. Tunnelling and Underground Space Technology, 2014. 42: pp. 206-215.|
|2.||Ahn, J., Cho, S., and D. H. Chung. Development of a statistical analysis model to benchmark the energy use intensity of subway stations. Applied Energy, 2016. 179: pp. 488-496.|
|3.||Pan, S., Liu, Y., Xie, L., Wang, X., Yuan, Y., and X., Jia. A thermal comfort field study on subway passengers during air-conditioning season in Beijing. Sustainable Cities and Society, 2020. 61: pp. 102-218.|
|4.||Bogdanovská, G., Molnar, V., and G. Fedorko. Failure analysis of condensing units for refrigerators with refrigerant R134a, R404A. International Journal of Refrigeration, 2019. 100: pp. 208-219.|
|5.||Ampofo, F., Maidment, G., and J. Missenden. Underground railway environment in the UK Part 2: Investigation of heat load. Applied Thermal Engineering, 2004. 24 (5-6): pp. 633-645.|
|6.||National Authority for Tunnel. Tunnel from Attaba to Geish Shaft Monitoring Measurements. Contract N 49/Metro, Phase 1. National Authority for Tunnel: Cairo, Eqypt, 2010; pp. 270–271.|
|7.||Wang, F., Wang, M., He, S., Zhang, J., and Y. Deng. Computational study of effects of jet fans on the ventilation of a highway curved tunnel. Tunnelling and underground space technology, 2010. 25 (4): pp. 382-390.|
|8.||Liu, Z., Chen, G., Zhou, D., Wang, Z., and Z. Guo. Numerical investigation of the pressure and friction resistance of a high-speed subway train based on an overset mesh method. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 2021. 235 (5): pp. 598-615.|
|9.||Zhang, Y. and Xiaofeng. Li. Numerical analysis on the condenser inlet air temperature of train-mounted air conditioner when a train stops in subway station tunnel. Sustainable Cities and Society, 2021. 69: pp. 10-79.|
|10.||Owais, M., Ahmed, A. S., Moussa, G. S., and A. A. Khalil. Integrating underground line design with existing public transportation systems to increase transit network connectivity: Case study in Greater Cairo. Expert Systems with Applications, 2021. 167: pp. 114-183.|
|11.||Wang, F., Wang, M., and Q. Wang. Numerical study of effects of deflected angles of jet fans on the normal ventilation in a curved tunnel. Tunnelling and Underground Space Technology, 2012. 31: pp. 80-85.|
|12.||Mohamed M. K., Mohamed S. H., and M. A. Ismail. NUMERICAL STUDY ON THE OPTIMIZATION OF SMOKE VENTILATION IN A SITUATION OF A TRAIN FIRE AT A SUBWAY STATION. Engineering Research Journal, 2020. 166: pp. 350-365.|
|13.||Juraeva, M., Ryu, K. J., Jeong, S. H., and D. J. Song. Influence of mechanical ventilation-shaft connecting location on subway tunnel ventilation performance. Journal of Wind Engineering and Industrial Aerodynamics, 2013. 119: pp. 114-120.|
|14.||Hartman, H. L., Mutmansky, J. M., Ramani, R. V., and Y. J. Wang. Mine ventilation and air conditioning. 2012: John Wiley & Sons. p. 752.|
|15.||Jiangyan, M., Zhang, X. in., Angui, L. i., Baoshun, D., Wenchao, L. v., Yongzhen, Guo., Wenrong, Z., and Lin. Huang. Analyses of the improvement of subway station thermal environment in northern severe cold regions. Building and environment, 2018. 143: pp. 579-590.|
|16.||Pan, S., Liu, J., Xie, J., Sun, Y., Cui, N., Zhang, L., and B. Zheng. A review of the piston effect in subway stations. Advances in Mechanical Engineering, 2013. 5: pp. 95-205.|
|17.||Yu, Y., You, S., Zhang, H., Ye, T., Wang, Y., and S. Wei. A review on available energy saving strategies for heating, ventilation and air conditioning in underground metro stations. Renewable and Sustainable Energy Reviews, 2021. 141: pp. 110-788.|