The Coupled Thermal Response Analysis of Green Roofs Based on the Discrete Element Method
As an effective energy-saving measure, green roofs significantly improve the thermal environment of buildings by covering the roof with vegetation and soil. This paper compares the thermal transfer performance of concrete roofs and green roofs under different temperature conditions. First, a uniaxia...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-12-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/14/12/3984 |
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| author | Chang Liu Xiaoyong Zhang Mingjie Jiang Shengnan Zhu Zhuan Wang Jianxu Long |
| author_facet | Chang Liu Xiaoyong Zhang Mingjie Jiang Shengnan Zhu Zhuan Wang Jianxu Long |
| author_sort | Chang Liu |
| collection | DOAJ |
| description | As an effective energy-saving measure, green roofs significantly improve the thermal environment of buildings by covering the roof with vegetation and soil. This paper compares the thermal transfer performance of concrete roofs and green roofs under different temperature conditions. First, a uniaxial compression discrete element method (DEM) was used to calibrate the mesoscopic parameters of concrete, ensuring an accurate representation of concrete properties. The results indicate that green roofs have significant insulation effects under high-temperature conditions in summer. After being exposed to high temperatures for 5 h, the temperature of the green roof was 23.4 degrees Celsius lower than that of the ordinary concrete roof. In addition, different initial temperatures of the model also have a certain impact on heat transfer. The higher the initial temperature, the slower the temperature increase under high-temperature conditions. In winter, the green roof significantly delays the cooling at the top of the building, demonstrating excellent thermal insulation performance. The maximum temperature difference compared with the concrete roof is 8 °C. Finally, there is an exponential relationship between the thermal resistivity of the green roof and the temperature. In conclusion, green roofs have significant energy-saving and environmental protection value. |
| format | Article |
| id | doaj-art-e55f4c2b1c794364be4b64cd158cec31 |
| institution | DOAJ |
| issn | 2075-5309 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj-art-e55f4c2b1c794364be4b64cd158cec312025-08-20T02:55:44ZengMDPI AGBuildings2075-53092024-12-011412398410.3390/buildings14123984The Coupled Thermal Response Analysis of Green Roofs Based on the Discrete Element MethodChang Liu0Xiaoyong Zhang1Mingjie Jiang2Shengnan Zhu3Zhuan Wang4Jianxu Long5College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, ChinaDepartment of Architectural Engineering, Guizhou Communications Polytechnic University, Guiyang 551400, ChinaCollege of Civil Engineering and Architecture, Guangxi University, Nanning 530004, ChinaCollege of Civil Engineering and Architecture, Guangxi University, Nanning 530004, ChinaDepartment of Architectural Engineering, Guizhou Communications Polytechnic University, Guiyang 551400, ChinaDepartment of Architectural Engineering, Guizhou Communications Polytechnic University, Guiyang 551400, ChinaAs an effective energy-saving measure, green roofs significantly improve the thermal environment of buildings by covering the roof with vegetation and soil. This paper compares the thermal transfer performance of concrete roofs and green roofs under different temperature conditions. First, a uniaxial compression discrete element method (DEM) was used to calibrate the mesoscopic parameters of concrete, ensuring an accurate representation of concrete properties. The results indicate that green roofs have significant insulation effects under high-temperature conditions in summer. After being exposed to high temperatures for 5 h, the temperature of the green roof was 23.4 degrees Celsius lower than that of the ordinary concrete roof. In addition, different initial temperatures of the model also have a certain impact on heat transfer. The higher the initial temperature, the slower the temperature increase under high-temperature conditions. In winter, the green roof significantly delays the cooling at the top of the building, demonstrating excellent thermal insulation performance. The maximum temperature difference compared with the concrete roof is 8 °C. Finally, there is an exponential relationship between the thermal resistivity of the green roof and the temperature. In conclusion, green roofs have significant energy-saving and environmental protection value.https://www.mdpi.com/2075-5309/14/12/3984green roofDEMthermal transfer performancethermal resistance |
| spellingShingle | Chang Liu Xiaoyong Zhang Mingjie Jiang Shengnan Zhu Zhuan Wang Jianxu Long The Coupled Thermal Response Analysis of Green Roofs Based on the Discrete Element Method Buildings green roof DEM thermal transfer performance thermal resistance |
| title | The Coupled Thermal Response Analysis of Green Roofs Based on the Discrete Element Method |
| title_full | The Coupled Thermal Response Analysis of Green Roofs Based on the Discrete Element Method |
| title_fullStr | The Coupled Thermal Response Analysis of Green Roofs Based on the Discrete Element Method |
| title_full_unstemmed | The Coupled Thermal Response Analysis of Green Roofs Based on the Discrete Element Method |
| title_short | The Coupled Thermal Response Analysis of Green Roofs Based on the Discrete Element Method |
| title_sort | coupled thermal response analysis of green roofs based on the discrete element method |
| topic | green roof DEM thermal transfer performance thermal resistance |
| url | https://www.mdpi.com/2075-5309/14/12/3984 |
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