Study on temperature distribution and smoke diffusion characteristics of cable shafts in high-rise buildings
The smoke and poisonous gas produced during combustion is one of the direct hazards of cable fire. For power cables laid vertically in the cable shaft of high-rise buildings, the chimney effect will speed up the spread and expand the harm of cable fire. The paper proposes a simulation method based o...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X23006305 |
| _version_ | 1827854792719859712 |
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| author | Caibo Liao Jinxin Yang Xin Li Zhibin Qiu Kai Li Tonghongfei Li |
| author_facet | Caibo Liao Jinxin Yang Xin Li Zhibin Qiu Kai Li Tonghongfei Li |
| author_sort | Caibo Liao |
| collection | DOAJ |
| description | The smoke and poisonous gas produced during combustion is one of the direct hazards of cable fire. For power cables laid vertically in the cable shaft of high-rise buildings, the chimney effect will speed up the spread and expand the harm of cable fire. The paper proposes a simulation method based on fire dynamics theory to analyze the diffusion and spread characteristics of cable fire. First, a three-dimensional model of the double-floor cable shaft with multiple cables laid vertically inside was built in the paper. Second, with the abnormal heating caused by overload or insulation breakdown as the excitation condition, the development process of cable fire is simulated. The diffusion of smoke and gas during the whole combustion process is studied and discussed. Then, the paper compares the simulation results of the model with different fire blocking materials. The simulation results show that the application of blocking materials will cause differences between the spread of fire and flue gases, and the difference can be used to evaluate the quality and performance of the fire blocking material. Finally, A test platform is constructed to verify the validity of the simulation analysis. |
| first_indexed | 2024-03-12T11:36:10Z |
| format | Article |
| id | doaj.art-162f9158196b447da0b4ec9e8e4f9742 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-03-12T11:36:10Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-162f9158196b447da0b4ec9e8e4f97422023-09-01T05:01:51ZengElsevierCase Studies in Thermal Engineering2214-157X2023-09-0149103324Study on temperature distribution and smoke diffusion characteristics of cable shafts in high-rise buildingsCaibo Liao0Jinxin Yang1Xin Li2Zhibin Qiu3Kai Li4Tonghongfei Li5Corresponding author.; Department of Energy and Electrical Engineering, Nanchang University, Nanchang, 330031, China; State Grid Nanchang Power Supply Company, Nanchang, 330069, ChinaDepartment of Energy and Electrical Engineering, Nanchang University, Nanchang, 330031, China; State Grid Nanchang Power Supply Company, Nanchang, 330069, ChinaDepartment of Energy and Electrical Engineering, Nanchang University, Nanchang, 330031, China; State Grid Nanchang Power Supply Company, Nanchang, 330069, ChinaDepartment of Energy and Electrical Engineering, Nanchang University, Nanchang, 330031, China; State Grid Nanchang Power Supply Company, Nanchang, 330069, ChinaDepartment of Energy and Electrical Engineering, Nanchang University, Nanchang, 330031, China; State Grid Nanchang Power Supply Company, Nanchang, 330069, ChinaDepartment of Energy and Electrical Engineering, Nanchang University, Nanchang, 330031, China; State Grid Nanchang Power Supply Company, Nanchang, 330069, ChinaThe smoke and poisonous gas produced during combustion is one of the direct hazards of cable fire. For power cables laid vertically in the cable shaft of high-rise buildings, the chimney effect will speed up the spread and expand the harm of cable fire. The paper proposes a simulation method based on fire dynamics theory to analyze the diffusion and spread characteristics of cable fire. First, a three-dimensional model of the double-floor cable shaft with multiple cables laid vertically inside was built in the paper. Second, with the abnormal heating caused by overload or insulation breakdown as the excitation condition, the development process of cable fire is simulated. The diffusion of smoke and gas during the whole combustion process is studied and discussed. Then, the paper compares the simulation results of the model with different fire blocking materials. The simulation results show that the application of blocking materials will cause differences between the spread of fire and flue gases, and the difference can be used to evaluate the quality and performance of the fire blocking material. Finally, A test platform is constructed to verify the validity of the simulation analysis.http://www.sciencedirect.com/science/article/pii/S2214157X23006305Fire safetyFluid dynamicsNumerical simulationPower cableThermal analysis |
| spellingShingle | Caibo Liao Jinxin Yang Xin Li Zhibin Qiu Kai Li Tonghongfei Li Study on temperature distribution and smoke diffusion characteristics of cable shafts in high-rise buildings Case Studies in Thermal Engineering Fire safety Fluid dynamics Numerical simulation Power cable Thermal analysis |
| title | Study on temperature distribution and smoke diffusion characteristics of cable shafts in high-rise buildings |
| title_full | Study on temperature distribution and smoke diffusion characteristics of cable shafts in high-rise buildings |
| title_fullStr | Study on temperature distribution and smoke diffusion characteristics of cable shafts in high-rise buildings |
| title_full_unstemmed | Study on temperature distribution and smoke diffusion characteristics of cable shafts in high-rise buildings |
| title_short | Study on temperature distribution and smoke diffusion characteristics of cable shafts in high-rise buildings |
| title_sort | study on temperature distribution and smoke diffusion characteristics of cable shafts in high rise buildings |
| topic | Fire safety Fluid dynamics Numerical simulation Power cable Thermal analysis |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X23006305 |
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