Laboratory investigations and numerical analysis of thermal performance of the single U-tube VBHE in multiple-layer substrates
In order to study the thermal performance of a single U-tube VBHE in multiple-layer substrates, the similarity principle was used to build an indoor comprehensive miniature bench of single U-tube VBHE innovatively, and effects of inlet water temperature and hydrogeological geology on the thermal per...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
The Japan Society of Mechanical Engineers
2018-01-01
|
| Series: | Journal of Thermal Science and Technology |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jtst/13/1/13_2018jtst0003/_pdf/-char/en |
| _version_ | 1818313069993918464 |
|---|---|
| author | Yajiao LIU Guangqin HUANG Xiaofeng YANG Jun LU Chunlong ZHUANG Nan WANG |
| author_facet | Yajiao LIU Guangqin HUANG Xiaofeng YANG Jun LU Chunlong ZHUANG Nan WANG |
| author_sort | Yajiao LIU |
| collection | DOAJ |
| description | In order to study the thermal performance of a single U-tube VBHE in multiple-layer substrates, the similarity principle was used to build an indoor comprehensive miniature bench of single U-tube VBHE innovatively, and effects of inlet water temperature and hydrogeological geology on the thermal performance of VBHE were analyzed. In addition, numerical simulation was used to assist in the research. The results indicate that to build a laboratory-scale GSHP system model test apparatus based on the similarity principle will achieve long-term test of GSHP system with smaller human and material resources and a shorter experimental cycle. It's more efficient and convenient. The simplified use of uniform soil thermal and physical properties can cause great deviation. Heat flux per unit pipe of the VBHE increases linearly with the temperature difference's increasing between the inlet water and initial soil. The water temperature along the tube under thermal conductivity increasing and decreasing conditions does not decrease as linearly as the temperature's decreasing under the uniform thermal conductivity condition. |
| first_indexed | 2024-12-13T08:27:54Z |
| format | Article |
| id | doaj.art-909f266f09854f4c9988e1ded51b3999 |
| institution | Directory Open Access Journal |
| issn | 1880-5566 |
| language | English |
| last_indexed | 2024-12-13T08:27:54Z |
| publishDate | 2018-01-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Thermal Science and Technology |
| spelling | doaj.art-909f266f09854f4c9988e1ded51b39992022-12-21T23:53:51ZengThe Japan Society of Mechanical EngineersJournal of Thermal Science and Technology1880-55662018-01-01131JTST0003JTST000310.1299/jtst.2018jtst0003jtstLaboratory investigations and numerical analysis of thermal performance of the single U-tube VBHE in multiple-layer substratesYajiao LIU0Guangqin HUANG1Xiaofeng YANG2Jun LU3Chunlong ZHUANG4Nan WANG5Dept. of Military Installation, Army Logistical University of PLADept. of Military Installation, Army Logistical University of PLADept. of Military Installation, Army Logistical University of PLAFaculty of Urban Construction and Environmental Engineering, Chongqing UniversityDept. of Military Installation, Army Logistical University of PLADept. of Military Installation, Army Logistical University of PLAIn order to study the thermal performance of a single U-tube VBHE in multiple-layer substrates, the similarity principle was used to build an indoor comprehensive miniature bench of single U-tube VBHE innovatively, and effects of inlet water temperature and hydrogeological geology on the thermal performance of VBHE were analyzed. In addition, numerical simulation was used to assist in the research. The results indicate that to build a laboratory-scale GSHP system model test apparatus based on the similarity principle will achieve long-term test of GSHP system with smaller human and material resources and a shorter experimental cycle. It's more efficient and convenient. The simplified use of uniform soil thermal and physical properties can cause great deviation. Heat flux per unit pipe of the VBHE increases linearly with the temperature difference's increasing between the inlet water and initial soil. The water temperature along the tube under thermal conductivity increasing and decreasing conditions does not decrease as linearly as the temperature's decreasing under the uniform thermal conductivity condition.https://www.jstage.jst.go.jp/article/jtst/13/1/13_2018jtst0003/_pdf/-char/enexperimentalnumericalsingle u-tube vbhegeological stratificationinlet water temperatureheat transfer performance |
| spellingShingle | Yajiao LIU Guangqin HUANG Xiaofeng YANG Jun LU Chunlong ZHUANG Nan WANG Laboratory investigations and numerical analysis of thermal performance of the single U-tube VBHE in multiple-layer substrates Journal of Thermal Science and Technology experimental numerical single u-tube vbhe geological stratification inlet water temperature heat transfer performance |
| title | Laboratory investigations and numerical analysis of thermal performance of the single U-tube VBHE in multiple-layer substrates |
| title_full | Laboratory investigations and numerical analysis of thermal performance of the single U-tube VBHE in multiple-layer substrates |
| title_fullStr | Laboratory investigations and numerical analysis of thermal performance of the single U-tube VBHE in multiple-layer substrates |
| title_full_unstemmed | Laboratory investigations and numerical analysis of thermal performance of the single U-tube VBHE in multiple-layer substrates |
| title_short | Laboratory investigations and numerical analysis of thermal performance of the single U-tube VBHE in multiple-layer substrates |
| title_sort | laboratory investigations and numerical analysis of thermal performance of the single u tube vbhe in multiple layer substrates |
| topic | experimental numerical single u-tube vbhe geological stratification inlet water temperature heat transfer performance |
| url | https://www.jstage.jst.go.jp/article/jtst/13/1/13_2018jtst0003/_pdf/-char/en |
| work_keys_str_mv | AT yajiaoliu laboratoryinvestigationsandnumericalanalysisofthermalperformanceofthesingleutubevbheinmultiplelayersubstrates AT guangqinhuang laboratoryinvestigationsandnumericalanalysisofthermalperformanceofthesingleutubevbheinmultiplelayersubstrates AT xiaofengyang laboratoryinvestigationsandnumericalanalysisofthermalperformanceofthesingleutubevbheinmultiplelayersubstrates AT junlu laboratoryinvestigationsandnumericalanalysisofthermalperformanceofthesingleutubevbheinmultiplelayersubstrates AT chunlongzhuang laboratoryinvestigationsandnumericalanalysisofthermalperformanceofthesingleutubevbheinmultiplelayersubstrates AT nanwang laboratoryinvestigationsandnumericalanalysisofthermalperformanceofthesingleutubevbheinmultiplelayersubstrates |