Effect of operational strategy on thermal response of a model energy diaphragm wall
The development of energy diaphragm walls (wall heat exchangers) provides a new perspective for the shallow geothermal energy exploitation. This study conducted a series of thermal performance tests on a model energy diaphragm wall, focusing on the effects of different relative temperature differenc...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-04-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25001492 |
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| author | Chenglong Wang Pengxi Zhu Xuanming Ding Qi Wu Gangqiang Kong |
| author_facet | Chenglong Wang Pengxi Zhu Xuanming Ding Qi Wu Gangqiang Kong |
| author_sort | Chenglong Wang |
| collection | DOAJ |
| description | The development of energy diaphragm walls (wall heat exchangers) provides a new perspective for the shallow geothermal energy exploitation. This study conducted a series of thermal performance tests on a model energy diaphragm wall, focusing on the effects of different relative temperature differences and operation modes, which closely aligned with the practical use of ground-source heat pump systems. The results indicate that increasing the relative temperature difference from 15 °C to 30 °C enhanced the wall's thermal efficiency and total heat exchange by 108.2 % and 116.2 %, respectively. Importantly, intermittent operation achieved a 35.7% maximum improvement in thermal efficiency compared to continuous operation. Thermal response analysis further revealed uneven temperature distribution across the wall and intense thermal coupling with the adjacent excavation space. Finally, the study proposes recommendations to optimize experimental designs and advance practical implementations of energy wall systems in geothermal projects. |
| format | Article |
| id | doaj-art-cbccc23e165047f7a0fde31ed6cdce85 |
| institution | OA Journals |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-cbccc23e165047f7a0fde31ed6cdce852025-08-20T01:57:40ZengElsevierCase Studies in Thermal Engineering2214-157X2025-04-016810588910.1016/j.csite.2025.105889Effect of operational strategy on thermal response of a model energy diaphragm wallChenglong Wang0Pengxi Zhu1Xuanming Ding2Qi Wu3Gangqiang Kong4School of Civil Engineering, Chongqing University, Chongqing, 400045, ChinaSchool of Civil Engineering, Chongqing University, Chongqing, 400045, ChinaSchool of Civil Engineering, Chongqing University, Chongqing, 400045, ChinaSchool of Civil Engineering, Chongqing University, Chongqing, 400045, China; Corresponding author.School of Civil and Transportation Engineering, Hohai University, Nanjing, Jiangsu, 210024, ChinaThe development of energy diaphragm walls (wall heat exchangers) provides a new perspective for the shallow geothermal energy exploitation. This study conducted a series of thermal performance tests on a model energy diaphragm wall, focusing on the effects of different relative temperature differences and operation modes, which closely aligned with the practical use of ground-source heat pump systems. The results indicate that increasing the relative temperature difference from 15 °C to 30 °C enhanced the wall's thermal efficiency and total heat exchange by 108.2 % and 116.2 %, respectively. Importantly, intermittent operation achieved a 35.7% maximum improvement in thermal efficiency compared to continuous operation. Thermal response analysis further revealed uneven temperature distribution across the wall and intense thermal coupling with the adjacent excavation space. Finally, the study proposes recommendations to optimize experimental designs and advance practical implementations of energy wall systems in geothermal projects.http://www.sciencedirect.com/science/article/pii/S2214157X25001492Energy diaphragm wallThermal responseOperational strategyExperimental studyLaboratory model test |
| spellingShingle | Chenglong Wang Pengxi Zhu Xuanming Ding Qi Wu Gangqiang Kong Effect of operational strategy on thermal response of a model energy diaphragm wall Case Studies in Thermal Engineering Energy diaphragm wall Thermal response Operational strategy Experimental study Laboratory model test |
| title | Effect of operational strategy on thermal response of a model energy diaphragm wall |
| title_full | Effect of operational strategy on thermal response of a model energy diaphragm wall |
| title_fullStr | Effect of operational strategy on thermal response of a model energy diaphragm wall |
| title_full_unstemmed | Effect of operational strategy on thermal response of a model energy diaphragm wall |
| title_short | Effect of operational strategy on thermal response of a model energy diaphragm wall |
| title_sort | effect of operational strategy on thermal response of a model energy diaphragm wall |
| topic | Energy diaphragm wall Thermal response Operational strategy Experimental study Laboratory model test |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X25001492 |
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