Optimization of the utilization of deep borehole heat exchangers
Abstract Deep-borehole heat exchangers (DBHE) are generally coaxial pipes installed in deep boreholes and has become an alternative approach to utilize geothermal energy. Since the performance of the DBHE system can be affected by several parameters, it is important to optimize the design of paramet...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2020-02-01
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| Series: | Geothermal Energy |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s40517-020-0161-4 |
| _version_ | 1818575859909394432 |
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| author | Sheng Pan Yanlong Kong Chaofan Chen Zhonghe Pang Jiyang Wang |
| author_facet | Sheng Pan Yanlong Kong Chaofan Chen Zhonghe Pang Jiyang Wang |
| author_sort | Sheng Pan |
| collection | DOAJ |
| description | Abstract Deep-borehole heat exchangers (DBHE) are generally coaxial pipes installed in deep boreholes and has become an alternative approach to utilize geothermal energy. Since the performance of the DBHE system can be affected by several parameters, it is important to optimize the design of parameters for the DBHE. In this paper, based on the analytical method, we carried out the sensitivity analysis of DBHE design parameters, including outer pipe diameter, inner pipe diameter, flow rate, outer pipe materials, grout materials, and borehole depth during continuous operation for 4 months. The sensitivity analysis results indicate that the heat extraction rate can be significantly affected by outer pipe diameter, borehole depth, and flow rate. The effects of grout materials, inner pipe diameter and outer pipe materials are of second-order. Finally, an optimization method based on the lowest Average Energy Cost index was proposed to optimize these DBHE design parameters under different geological conditions. Given the cost in this study, a combination scheme of all the optimal parameters is given for different depth wells under different geological conditions. |
| first_indexed | 2024-12-15T00:46:53Z |
| format | Article |
| id | doaj.art-3a23d3ba34364ef890e53899d178dbb5 |
| institution | Directory Open Access Journal |
| issn | 2195-9706 |
| language | English |
| last_indexed | 2024-12-15T00:46:53Z |
| publishDate | 2020-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Geothermal Energy |
| spelling | doaj.art-3a23d3ba34364ef890e53899d178dbb52022-12-21T22:41:31ZengSpringerOpenGeothermal Energy2195-97062020-02-018112010.1186/s40517-020-0161-4Optimization of the utilization of deep borehole heat exchangersSheng Pan0Yanlong Kong1Chaofan Chen2Zhonghe Pang3Jiyang Wang4Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of SciencesKey Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of SciencesHelmholtz Centre for Environmental Research-UFZKey Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of SciencesKey Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of SciencesAbstract Deep-borehole heat exchangers (DBHE) are generally coaxial pipes installed in deep boreholes and has become an alternative approach to utilize geothermal energy. Since the performance of the DBHE system can be affected by several parameters, it is important to optimize the design of parameters for the DBHE. In this paper, based on the analytical method, we carried out the sensitivity analysis of DBHE design parameters, including outer pipe diameter, inner pipe diameter, flow rate, outer pipe materials, grout materials, and borehole depth during continuous operation for 4 months. The sensitivity analysis results indicate that the heat extraction rate can be significantly affected by outer pipe diameter, borehole depth, and flow rate. The effects of grout materials, inner pipe diameter and outer pipe materials are of second-order. Finally, an optimization method based on the lowest Average Energy Cost index was proposed to optimize these DBHE design parameters under different geological conditions. Given the cost in this study, a combination scheme of all the optimal parameters is given for different depth wells under different geological conditions.https://doi.org/10.1186/s40517-020-0161-4Deep-borehole heat exchangerGeothermal energySensitivity analysisOptimal heat extraction rateEconomic analysis |
| spellingShingle | Sheng Pan Yanlong Kong Chaofan Chen Zhonghe Pang Jiyang Wang Optimization of the utilization of deep borehole heat exchangers Geothermal Energy Deep-borehole heat exchanger Geothermal energy Sensitivity analysis Optimal heat extraction rate Economic analysis |
| title | Optimization of the utilization of deep borehole heat exchangers |
| title_full | Optimization of the utilization of deep borehole heat exchangers |
| title_fullStr | Optimization of the utilization of deep borehole heat exchangers |
| title_full_unstemmed | Optimization of the utilization of deep borehole heat exchangers |
| title_short | Optimization of the utilization of deep borehole heat exchangers |
| title_sort | optimization of the utilization of deep borehole heat exchangers |
| topic | Deep-borehole heat exchanger Geothermal energy Sensitivity analysis Optimal heat extraction rate Economic analysis |
| url | https://doi.org/10.1186/s40517-020-0161-4 |
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