Effect of ventilation on thermal and humidity environment of the underground utility tunnel in the plum rain season in southern China: Field measurement and CFD simulation
The underground utility tunnel (UUT) is one of the typical urban underground structures, which usually requires mechanical ventilation systems for forced ventilation. In addition to the ventilation scheme for accident scenarios, the normal operating ventilation scheme deserves equal attention as it...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2023-12-01
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| Series: | Underground Space |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2467967423000740 |
| _version_ | 1827788640976109568 |
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| author | Huixin Ma Xuanyi Zhou Jian Huang |
| author_facet | Huixin Ma Xuanyi Zhou Jian Huang |
| author_sort | Huixin Ma |
| collection | DOAJ |
| description | The underground utility tunnel (UUT) is one of the typical urban underground structures, which usually requires mechanical ventilation systems for forced ventilation. In addition to the ventilation scheme for accident scenarios, the normal operating ventilation scheme deserves equal attention as it has a great impact on the air quality as well as the thermal and humidity environment inside the UUT. In this study, a UUT located in southern China is taken as the research object, and the effect of ventilation on its internal thermal and humidity distribution is explored with a combined use of field measurements and numerical simulations. The results of field measurements show that the average temperature inside the closed UUT is 20.5 ℃ and the average humidity ratio is 14.1 g/kgdry; both are lower than those of the external environment. In the plum rain season, if the tunnel is ventilated without any treatment of the external airflows, surface condensation tends to occur near the air inlet while the region with high relative humidity would be distributed on both sides far from the air inlet. The study also discusses the effect of different temperatures and humidity ratios of the inflow air on the humidity inside the UUT, and on this basis, the humidity control strategy for UUT in the plum rain season is proposed. |
| first_indexed | 2024-03-11T17:09:22Z |
| format | Article |
| id | doaj.art-6ef2fea01c89466c86b750208cbffa2d |
| institution | Directory Open Access Journal |
| issn | 2467-9674 |
| language | English |
| last_indexed | 2024-03-11T17:09:22Z |
| publishDate | 2023-12-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Underground Space |
| spelling | doaj.art-6ef2fea01c89466c86b750208cbffa2d2023-10-20T06:40:12ZengKeAi Communications Co., Ltd.Underground Space2467-96742023-12-0113301315Effect of ventilation on thermal and humidity environment of the underground utility tunnel in the plum rain season in southern China: Field measurement and CFD simulationHuixin Ma0Xuanyi Zhou1Jian Huang2State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, ChinaState Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, ChinaShanghai Municipal Engineering Design Institute (Group) Co., Ltd., Shanghai 200092, China; Corresponding author.The underground utility tunnel (UUT) is one of the typical urban underground structures, which usually requires mechanical ventilation systems for forced ventilation. In addition to the ventilation scheme for accident scenarios, the normal operating ventilation scheme deserves equal attention as it has a great impact on the air quality as well as the thermal and humidity environment inside the UUT. In this study, a UUT located in southern China is taken as the research object, and the effect of ventilation on its internal thermal and humidity distribution is explored with a combined use of field measurements and numerical simulations. The results of field measurements show that the average temperature inside the closed UUT is 20.5 ℃ and the average humidity ratio is 14.1 g/kgdry; both are lower than those of the external environment. In the plum rain season, if the tunnel is ventilated without any treatment of the external airflows, surface condensation tends to occur near the air inlet while the region with high relative humidity would be distributed on both sides far from the air inlet. The study also discusses the effect of different temperatures and humidity ratios of the inflow air on the humidity inside the UUT, and on this basis, the humidity control strategy for UUT in the plum rain season is proposed.http://www.sciencedirect.com/science/article/pii/S2467967423000740Underground utility tunnel (UUT)Mechanical ventilationPlum rain seasonComputational fluid dynamicThermal and humidity environment |
| spellingShingle | Huixin Ma Xuanyi Zhou Jian Huang Effect of ventilation on thermal and humidity environment of the underground utility tunnel in the plum rain season in southern China: Field measurement and CFD simulation Underground Space Underground utility tunnel (UUT) Mechanical ventilation Plum rain season Computational fluid dynamic Thermal and humidity environment |
| title | Effect of ventilation on thermal and humidity environment of the underground utility tunnel in the plum rain season in southern China: Field measurement and CFD simulation |
| title_full | Effect of ventilation on thermal and humidity environment of the underground utility tunnel in the plum rain season in southern China: Field measurement and CFD simulation |
| title_fullStr | Effect of ventilation on thermal and humidity environment of the underground utility tunnel in the plum rain season in southern China: Field measurement and CFD simulation |
| title_full_unstemmed | Effect of ventilation on thermal and humidity environment of the underground utility tunnel in the plum rain season in southern China: Field measurement and CFD simulation |
| title_short | Effect of ventilation on thermal and humidity environment of the underground utility tunnel in the plum rain season in southern China: Field measurement and CFD simulation |
| title_sort | effect of ventilation on thermal and humidity environment of the underground utility tunnel in the plum rain season in southern china field measurement and cfd simulation |
| topic | Underground utility tunnel (UUT) Mechanical ventilation Plum rain season Computational fluid dynamic Thermal and humidity environment |
| url | http://www.sciencedirect.com/science/article/pii/S2467967423000740 |
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