Heat Transfer and Bearing Characteristics of Energy Piles: Review
Energy piles, combined ground source heat pumps (GSHP) with the traditional pile foundation, have the advantages of high heat transfer efficiency, less space occupation and low cost. This paper summarizes the latest research on the heat transfer and bearing capacity of energy piles. It is found that...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-10-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/20/6483 |
| _version_ | 1797514752343146496 |
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| author | Jinli Xie Yinghong Qin |
| author_facet | Jinli Xie Yinghong Qin |
| author_sort | Jinli Xie |
| collection | DOAJ |
| description | Energy piles, combined ground source heat pumps (GSHP) with the traditional pile foundation, have the advantages of high heat transfer efficiency, less space occupation and low cost. This paper summarizes the latest research on the heat transfer and bearing capacity of energy piles. It is found that S-shaped tubes have the largest heat transfer area and the best heat transfer efficiency; that energy piles need to be designed conservatively, such as adjusting the safety coefficient, number and spacing of the piles according to the additional temperature loads; and that unbalanced surface temperature has not been resolved, caused by uneven refrigeration/heating demand in one cycle. A composite energy pile applied to water-rich areas is proposed to overcome the decay of bearing and heat transfer performance. Besides, most of the heat transfer models are borehole-oriented and will fit for energy piles effectively if the models support variable ground temperature boundary conditions. |
| first_indexed | 2024-03-10T06:36:23Z |
| format | Article |
| id | doaj.art-340494c922cd4e9484b38ed26f6ec437 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T06:36:23Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-340494c922cd4e9484b38ed26f6ec4372023-11-22T18:03:57ZengMDPI AGEnergies1996-10732021-10-011420648310.3390/en14206483Heat Transfer and Bearing Characteristics of Energy Piles: ReviewJinli Xie0Yinghong Qin1College of Civil Engineering and Architecture, Guangxi University, 100 University Road, Nanning 530004, ChinaCollege of Civil Engineering and Architecture, Guangxi University, 100 University Road, Nanning 530004, ChinaEnergy piles, combined ground source heat pumps (GSHP) with the traditional pile foundation, have the advantages of high heat transfer efficiency, less space occupation and low cost. This paper summarizes the latest research on the heat transfer and bearing capacity of energy piles. It is found that S-shaped tubes have the largest heat transfer area and the best heat transfer efficiency; that energy piles need to be designed conservatively, such as adjusting the safety coefficient, number and spacing of the piles according to the additional temperature loads; and that unbalanced surface temperature has not been resolved, caused by uneven refrigeration/heating demand in one cycle. A composite energy pile applied to water-rich areas is proposed to overcome the decay of bearing and heat transfer performance. Besides, most of the heat transfer models are borehole-oriented and will fit for energy piles effectively if the models support variable ground temperature boundary conditions.https://www.mdpi.com/1996-1073/14/20/6483ground source heat pumpsenergy pilesheat transferbearing capacity |
| spellingShingle | Jinli Xie Yinghong Qin Heat Transfer and Bearing Characteristics of Energy Piles: Review Energies ground source heat pumps energy piles heat transfer bearing capacity |
| title | Heat Transfer and Bearing Characteristics of Energy Piles: Review |
| title_full | Heat Transfer and Bearing Characteristics of Energy Piles: Review |
| title_fullStr | Heat Transfer and Bearing Characteristics of Energy Piles: Review |
| title_full_unstemmed | Heat Transfer and Bearing Characteristics of Energy Piles: Review |
| title_short | Heat Transfer and Bearing Characteristics of Energy Piles: Review |
| title_sort | heat transfer and bearing characteristics of energy piles review |
| topic | ground source heat pumps energy piles heat transfer bearing capacity |
| url | https://www.mdpi.com/1996-1073/14/20/6483 |
| work_keys_str_mv | AT jinlixie heattransferandbearingcharacteristicsofenergypilesreview AT yinghongqin heattransferandbearingcharacteristicsofenergypilesreview |