Numerical analysis of factors affecting the range of heat transfer in earth surrounding three subways

• Published in: Journal of China University of Mining and Technology Vol. 18; no. 1; pp. 67 - 71
• Main Authors: HU, Zeng-hui, LI, Xiao-zhao, ZHAO, Xiao-bao, XIAO, Lin, WU, Wei
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.03.2008; Department of Earth Sciences, Nanjing University, Nanjing, Jiangsu 210093, China
• Subjects: earth surrounding subways; numerical analysis; range of heat transfer factors affecting heat transfer; 数字分析技术; 热传递; 通风系统; earth surrounding subways; numerical analysis; range of heat transfer factors affecting heat transfer
• ISSN: 1006-1266
• DOI: 10.1016/S1006-1266(08)60015-2

In order to examine the factors which affect the range of heat transfer in earth surrounding subways, FLAC3D was adopted in this study to analyze these factors, under different conditions, in a systematic manner. When we compare these numerical tests, the results show that the main factors, affecting the heat transfer range are the thermal properties of the surrounding earth, the initial ground temperature and the temperature in the tunnel. The heat transfer coefficient between air and linings has little effect on the temperature distribution around the tunnel. The current results can provide a reference for improving the thermal environment in subways and optimizing the design of subwav ventilation and air conditioning.