Study on Air Cabin Ventilation System by Local Structural Optimization during Tunnel Construction
In tunnel construction, the difficulty of ventilation gradually increases with the increase of ventilation distance, which endangers construction safety and delays construction progress. This paper presents an air cabin ventilation system of the tunnel during construction. Theoretical calculations s...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/12/12/2235 |
| _version_ | 1797461117887315968 |
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| author | Shuai Yang Rui Ren Ya-Qiong Wang |
| author_facet | Shuai Yang Rui Ren Ya-Qiong Wang |
| author_sort | Shuai Yang |
| collection | DOAJ |
| description | In tunnel construction, the difficulty of ventilation gradually increases with the increase of ventilation distance, which endangers construction safety and delays construction progress. This paper presents an air cabin ventilation system of the tunnel during construction. Theoretical calculations show that the energy consumption of this ventilation system is reduced by 20.7% compared with blowing ventilation, especially since the resistance loss along the air duct is reduced by 47.04%. A 3D numerical model validated with field test data was employed to discuss the air cabin structural parameters on the ventilation efficiency of the axial fan. The results show that the relative pressure on the fan’s end face increases when the air cabin’s length–width ratio is <i>R</i> = 1:2. The fan spacing <i>S</i> = 2–4 m can ensure the larger relative pressure of multiple fans. The significant difference in air demand between the left and right sides causes the disordered airflow. Set a middle diaphragm length of 1.5 <i>D</i> in the air cabin, which can effectively reduce the phenomenon. The middle diaphragm with a radian of 30°effectively reduced the local loss by 59.40%. The proposed ventilation system shortens the ventilation distance and has the advantages of low energy consumption and resistance loss. It improves the construction environment and is a valuable means of ventilation design for tunnel construction. |
| first_indexed | 2024-03-09T17:15:48Z |
| format | Article |
| id | doaj.art-f0af346e70bd4d2a9321bfc0f140c873 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-09T17:15:48Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-f0af346e70bd4d2a9321bfc0f140c8732023-11-24T13:44:08ZengMDPI AGBuildings2075-53092022-12-011212223510.3390/buildings12122235Study on Air Cabin Ventilation System by Local Structural Optimization during Tunnel ConstructionShuai Yang0Rui Ren1Ya-Qiong Wang2School of Highway, Chang’an University, Xi’an 710064, ChinaSchool of Highway, Chang’an University, Xi’an 710064, ChinaSchool of Highway, Chang’an University, Xi’an 710064, ChinaIn tunnel construction, the difficulty of ventilation gradually increases with the increase of ventilation distance, which endangers construction safety and delays construction progress. This paper presents an air cabin ventilation system of the tunnel during construction. Theoretical calculations show that the energy consumption of this ventilation system is reduced by 20.7% compared with blowing ventilation, especially since the resistance loss along the air duct is reduced by 47.04%. A 3D numerical model validated with field test data was employed to discuss the air cabin structural parameters on the ventilation efficiency of the axial fan. The results show that the relative pressure on the fan’s end face increases when the air cabin’s length–width ratio is <i>R</i> = 1:2. The fan spacing <i>S</i> = 2–4 m can ensure the larger relative pressure of multiple fans. The significant difference in air demand between the left and right sides causes the disordered airflow. Set a middle diaphragm length of 1.5 <i>D</i> in the air cabin, which can effectively reduce the phenomenon. The middle diaphragm with a radian of 30°effectively reduced the local loss by 59.40%. The proposed ventilation system shortens the ventilation distance and has the advantages of low energy consumption and resistance loss. It improves the construction environment and is a valuable means of ventilation design for tunnel construction.https://www.mdpi.com/2075-5309/12/12/2235tunnel constructionair cabin ventilation systemventilation energy consumptionnumerical simulationconstruction environment optimization |
| spellingShingle | Shuai Yang Rui Ren Ya-Qiong Wang Study on Air Cabin Ventilation System by Local Structural Optimization during Tunnel Construction Buildings tunnel construction air cabin ventilation system ventilation energy consumption numerical simulation construction environment optimization |
| title | Study on Air Cabin Ventilation System by Local Structural Optimization during Tunnel Construction |
| title_full | Study on Air Cabin Ventilation System by Local Structural Optimization during Tunnel Construction |
| title_fullStr | Study on Air Cabin Ventilation System by Local Structural Optimization during Tunnel Construction |
| title_full_unstemmed | Study on Air Cabin Ventilation System by Local Structural Optimization during Tunnel Construction |
| title_short | Study on Air Cabin Ventilation System by Local Structural Optimization during Tunnel Construction |
| title_sort | study on air cabin ventilation system by local structural optimization during tunnel construction |
| topic | tunnel construction air cabin ventilation system ventilation energy consumption numerical simulation construction environment optimization |
| url | https://www.mdpi.com/2075-5309/12/12/2235 |
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