Comparison Study on the Performance of a Novel and Traditional Energy Piles by Laboratory Tests
Phase change material (PCM) is a substance that can absorb or release sufficient latent heat at phase transition. By encapsulating phase change paraffin in hollow steel balls in the concrete, an energy pile with PCM was innovatively produced to improve energy efficiency for the ground heat pumping s...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-10-01
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| Series: | Symmetry |
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| Online Access: | https://www.mdpi.com/2073-8994/13/10/1958 |
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| author | Xiaohua Bao Xuedong Qi Hongzhi Cui Jinping Zou Xiong Xiao |
| author_facet | Xiaohua Bao Xuedong Qi Hongzhi Cui Jinping Zou Xiong Xiao |
| author_sort | Xiaohua Bao |
| collection | DOAJ |
| description | Phase change material (PCM) is a substance that can absorb or release sufficient latent heat at phase transition. By encapsulating phase change paraffin in hollow steel balls in the concrete, an energy pile with PCM was innovatively produced to improve energy efficiency for the ground heat pumping system. Laboratory tests were carried out on both PCM energy pile and traditional concrete pile to evaluate the thermo mechanical performance. Two piles were heated and cooled through inside tubes at a constant flow rate. The laboratory tests on the two piles were symmetrical for the two horizontal directions in geometry, and heat transfer process follows conservation laws of energy. The temperature response of the pile and soil, internal strain, pile displacement, pore pressure, and soil pressure under heating-cooling cycles were examined. Compared with the traditional concrete pile, the PCM energy pile can effectively reduce the surrounding soil temperature. The use of PCM in the pile can improve the capacity of heat storage and make the pile more effective in heat exchange. Non-uniform thermal strain and accumulations of heat and irrecoverable displacement were observed in the repeated heating-cooling process. The study can provide references for the practical implication of PCM energy piles. |
| first_indexed | 2024-03-10T06:10:12Z |
| format | Article |
| id | doaj.art-294e309929e6446d8f46149ac6feb1dc |
| institution | Directory Open Access Journal |
| issn | 2073-8994 |
| language | English |
| last_indexed | 2024-03-10T06:10:12Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Symmetry |
| spelling | doaj.art-294e309929e6446d8f46149ac6feb1dc2023-11-22T20:11:37ZengMDPI AGSymmetry2073-89942021-10-011310195810.3390/sym13101958Comparison Study on the Performance of a Novel and Traditional Energy Piles by Laboratory TestsXiaohua Bao0Xuedong Qi1Hongzhi Cui2Jinping Zou3Xiong Xiao4Key Lab of Coastal Urban Resilient Infrastructure, Ministry of Education (MOE), Shenzhen 518060, ChinaKey Lab of Coastal Urban Resilient Infrastructure, Ministry of Education (MOE), Shenzhen 518060, ChinaKey Lab of Coastal Urban Resilient Infrastructure, Ministry of Education (MOE), Shenzhen 518060, ChinaKey Lab of Coastal Urban Resilient Infrastructure, Ministry of Education (MOE), Shenzhen 518060, ChinaKey Lab of Coastal Urban Resilient Infrastructure, Ministry of Education (MOE), Shenzhen 518060, ChinaPhase change material (PCM) is a substance that can absorb or release sufficient latent heat at phase transition. By encapsulating phase change paraffin in hollow steel balls in the concrete, an energy pile with PCM was innovatively produced to improve energy efficiency for the ground heat pumping system. Laboratory tests were carried out on both PCM energy pile and traditional concrete pile to evaluate the thermo mechanical performance. Two piles were heated and cooled through inside tubes at a constant flow rate. The laboratory tests on the two piles were symmetrical for the two horizontal directions in geometry, and heat transfer process follows conservation laws of energy. The temperature response of the pile and soil, internal strain, pile displacement, pore pressure, and soil pressure under heating-cooling cycles were examined. Compared with the traditional concrete pile, the PCM energy pile can effectively reduce the surrounding soil temperature. The use of PCM in the pile can improve the capacity of heat storage and make the pile more effective in heat exchange. Non-uniform thermal strain and accumulations of heat and irrecoverable displacement were observed in the repeated heating-cooling process. The study can provide references for the practical implication of PCM energy piles.https://www.mdpi.com/2073-8994/13/10/1958energy pilephase change materialtemperature responselaboratory testdisplacement |
| spellingShingle | Xiaohua Bao Xuedong Qi Hongzhi Cui Jinping Zou Xiong Xiao Comparison Study on the Performance of a Novel and Traditional Energy Piles by Laboratory Tests Symmetry energy pile phase change material temperature response laboratory test displacement |
| title | Comparison Study on the Performance of a Novel and Traditional Energy Piles by Laboratory Tests |
| title_full | Comparison Study on the Performance of a Novel and Traditional Energy Piles by Laboratory Tests |
| title_fullStr | Comparison Study on the Performance of a Novel and Traditional Energy Piles by Laboratory Tests |
| title_full_unstemmed | Comparison Study on the Performance of a Novel and Traditional Energy Piles by Laboratory Tests |
| title_short | Comparison Study on the Performance of a Novel and Traditional Energy Piles by Laboratory Tests |
| title_sort | comparison study on the performance of a novel and traditional energy piles by laboratory tests |
| topic | energy pile phase change material temperature response laboratory test displacement |
| url | https://www.mdpi.com/2073-8994/13/10/1958 |
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