Study on Thermodynamic Properties of Spiral Tube-Encapsulated Phase-Change Material Energy Pile
Based on the research status of phase-change material (PCM) energy piles, this paper proposes a new type of PCM energy pile-spiral tube-encapsulated PCM energy pile. In order to study the related properties of the energy pile, this study designed and processed the relevant test equipment and built a...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-01-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/14/1/188 |
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| author | Ming Liu Peng Zhang Zhiyu Yang Zhen Zhu Xiaozheng Liu Chuntang Ma |
| author_facet | Ming Liu Peng Zhang Zhiyu Yang Zhen Zhu Xiaozheng Liu Chuntang Ma |
| author_sort | Ming Liu |
| collection | DOAJ |
| description | Based on the research status of phase-change material (PCM) energy piles, this paper proposes a new type of PCM energy pile-spiral tube-encapsulated PCM energy pile. In order to study the related properties of the energy pile, this study designed and processed the relevant test equipment and built an indoor scale model experimental system. The thermodynamic performance of the spiral tube-encapsulated phase-change energy pile under summer conditions was studied by the test system. Through the indoor scale model test, it is found that compared with the traditional energy pile, the spiral tube-encapsulated PCM energy pile improves the heat exchange capacity of the unit pile body in the early and middle stages of operation, and reduces the surface temperature of the pile body and the heating rate of the surface temperature of the pile body. The upward displacement of the energy pile top is reduced. The heat exchange capacity of the unit pile depth is increased by 6.52 W/m, the maximum pile surface temperature difference is 0.62 °C, and the maximum pile top displacement difference is 0.005 mm. In addition, the total heat transfer of the spiral tube-encapsulated PCM energy pile during the whole operation period is 3.38% higher than that of the traditional energy pile. However, during the whole operation period, the surface stress value of the spiral tube encapsulated PCM energy pile is higher than that of the traditional energy pile. The maximum difference between the two is 9.84 kPa and the maximum difference is 10.8%. The difference between the two is finally stabilized at 1.4 kPa with an increase in time, and the final difference is only 8.8%. |
| first_indexed | 2024-03-08T09:56:13Z |
| format | Article |
| id | doaj.art-d1c621e5bfa84b5daa685cd748509263 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-08T09:56:13Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-d1c621e5bfa84b5daa685cd7485092632024-01-29T13:49:08ZengMDPI AGBuildings2075-53092024-01-0114118810.3390/buildings14010188Study on Thermodynamic Properties of Spiral Tube-Encapsulated Phase-Change Material Energy PileMing Liu0Peng Zhang1Zhiyu Yang2Zhen Zhu3Xiaozheng Liu4Chuntang Ma5School of Civil Engineering, Qingdao University of Technology, Qingdao 266520, ChinaSchool of Civil Engineering, Qingdao University of Technology, Qingdao 266520, ChinaCommittee for the Promotion of Building Energy Conservation Technology, China Association of Building Energy Efficiency, Beijing 100835, ChinaSchool of Civil Engineering, Qingdao University of Technology, Qingdao 266520, ChinaSchool of Civil Engineering, Qingdao University of Technology, Qingdao 266520, ChinaSchool of Civil Engineering, Qingdao University of Technology, Qingdao 266520, ChinaBased on the research status of phase-change material (PCM) energy piles, this paper proposes a new type of PCM energy pile-spiral tube-encapsulated PCM energy pile. In order to study the related properties of the energy pile, this study designed and processed the relevant test equipment and built an indoor scale model experimental system. The thermodynamic performance of the spiral tube-encapsulated phase-change energy pile under summer conditions was studied by the test system. Through the indoor scale model test, it is found that compared with the traditional energy pile, the spiral tube-encapsulated PCM energy pile improves the heat exchange capacity of the unit pile body in the early and middle stages of operation, and reduces the surface temperature of the pile body and the heating rate of the surface temperature of the pile body. The upward displacement of the energy pile top is reduced. The heat exchange capacity of the unit pile depth is increased by 6.52 W/m, the maximum pile surface temperature difference is 0.62 °C, and the maximum pile top displacement difference is 0.005 mm. In addition, the total heat transfer of the spiral tube-encapsulated PCM energy pile during the whole operation period is 3.38% higher than that of the traditional energy pile. However, during the whole operation period, the surface stress value of the spiral tube encapsulated PCM energy pile is higher than that of the traditional energy pile. The maximum difference between the two is 9.84 kPa and the maximum difference is 10.8%. The difference between the two is finally stabilized at 1.4 kPa with an increase in time, and the final difference is only 8.8%.https://www.mdpi.com/2075-5309/14/1/188phase-change materialenergy pileheat transfer performancethermodynamic performance |
| spellingShingle | Ming Liu Peng Zhang Zhiyu Yang Zhen Zhu Xiaozheng Liu Chuntang Ma Study on Thermodynamic Properties of Spiral Tube-Encapsulated Phase-Change Material Energy Pile Buildings phase-change material energy pile heat transfer performance thermodynamic performance |
| title | Study on Thermodynamic Properties of Spiral Tube-Encapsulated Phase-Change Material Energy Pile |
| title_full | Study on Thermodynamic Properties of Spiral Tube-Encapsulated Phase-Change Material Energy Pile |
| title_fullStr | Study on Thermodynamic Properties of Spiral Tube-Encapsulated Phase-Change Material Energy Pile |
| title_full_unstemmed | Study on Thermodynamic Properties of Spiral Tube-Encapsulated Phase-Change Material Energy Pile |
| title_short | Study on Thermodynamic Properties of Spiral Tube-Encapsulated Phase-Change Material Energy Pile |
| title_sort | study on thermodynamic properties of spiral tube encapsulated phase change material energy pile |
| topic | phase-change material energy pile heat transfer performance thermodynamic performance |
| url | https://www.mdpi.com/2075-5309/14/1/188 |
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