A three-dimensional full-scale model for predicting the performance of deep-buried ground heat exchanger considering groundwater flow
| العنوان: | A three-dimensional full-scale model for predicting the performance of deep-buried ground heat exchanger considering groundwater flow |
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| المؤلفون: | Z.D. Ma, G.S. Jia, Y.P. Zhang, C.Y. Miao, Z.H. Xia, L.W. Jin |
| المصدر: | IOP Conference Series: Earth and Environmental Science. 1074:012007 |
| بيانات النشر: | IOP Publishing, 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | General Medicine, General Chemistry |
| الوصف: | It is critical to precisely determine the performance of deep-buried ground heat exchangers involving different geological layers in engineering projects of the geothermal energy utilization. Compared to the existing approaches solving only conduction between the ground heat exchanger and the surrounding ground based on the two-dimensional model, this paper established a three-dimensional full-scale coaxial ground heat exchanger model containing both aquifer and aquifuge layers involving groundwater effect. The convective heat transfer in pipes was calculated using the empirical correlation of Nusselt number to improve the computation efficiency. The groundwater velocity in the energy governing equation was assumed to be constant and along with the horizontal direction to further simplify the computation. The developed method was applied to a 2800 m and 2600 m depth ground heat exchangers with different geological conditions, and was validated by the field test and published data. The relative errors are less than 6.9%. The thermal influence ranges of the aquifer layer and the aquifuge layer close to aquifer are asymmetric about the circumferential direction. The results demonstrated that the three-dimensional full-scale model is necessary for accurately evaluating the performance of ground heat exchangers when there is groundwater migration. |
| تدمد: | 1755-1315 1755-1307 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::099e051e7f6eb63a750770e7d9716947 https://doi.org/10.1088/1755-1315/1074/1/012007 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi...........099e051e7f6eb63a750770e7d9716947 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 17551315 17551307 |
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