- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | SUN Keguo, WEI Yong, JIA Jinglong, MENG Qingyu, ZHANG Chi, QIN Jinhang, LI Shibin. Temperature Rise Effects and Impact of Solar Shed in Cold Region Tunnels[J]. Journal of Southwest Jiaotong University, 2023, 58(3): 645-655. doi: 10.3969/j.issn.0258-2724.20220398
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To avoid frost damage problems in cold regions tunnels, a solar shed was introduced as one of the insulation measures. First, a three-dimensional transient heat transfer numerical model was established to obtain the tunnel temperature field under natural ventilation, and the reliability of the numerical calculation model was verified through on-site temperature monitoring. Then, the temperature rise effects of the solar shed were demonstrated through numerical methods, and the effects of the solar shed’s speed, length, span, and ambient temperature on the temperature rise effects were further investigated. Finally, a sensitivity analysis was conducted on these factors to study their impact on temperature rise. The study results show that the solar shed has a good temperature rise effect when the wind speed is lower than 1.0 m/s. The wind speed was negatively related to the temperature rise effects. The air temperature at the tunnel entrance increases by 0.71 ℃ for every 50 m increase in length. The influence of the span on temperature rise effects is not obvious. The temperature rise effects become more and more significant as the ambient temperature becomes lower. The sensitivity of the above factors to temperature rise effects is ranked as follows: wind speed (0.39) > length (0.30) > ambient temperature (0.19) > span (0.12), of which the wind speed is the most sensitive factor and should be considered in the application. Therefore, the recommendation for the use of a solar shed is in environments with low wind speed, long tunnel lengths and small tunnel spans.
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