Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| A numerical study of EGS heat extraction process based on a thermal non-equilibrium model for heat transfer in subsurface porous heat reservoir | |
Chen, Jiliang; Jiang, Fangming
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| 2016-02-01 | |
| Source Publication | HEAT AND MASS TRANSFER
 |
| Volume | 52Issue:2Pages:255-267 |
| Abstract | With a previously developed numerical model, we perform a detailed study of the heat extraction process in enhanced or engineered geothermal system (EGS). This model takes the EGS subsurface heat reservoir as an equivalent porous medium while it considers local thermal non-equilibrium between the rock matrix and the fluid flowing in the fractured rock mass. The application of local thermal non-equilibrium model highlights the temperature-difference heat exchange process occurring in EGS reservoirs, enabling a better understanding of the involved heat extraction process. The simulation results unravel the mechanism of preferential flow or short-circuit flow forming in homogeneously fractured reservoirs of different permeability values. EGS performance, e.g. production temperature and lifetime, is found to be tightly related to the flow pattern in the reservoir. Thermal compensation from rocks surrounding the reservoir contributes little heat to the heat transmission fluid if the operation time of an EGS is shorter than 15 years. We find as well the local thermal equilibrium model generally overestimates EGS performance and for an EGS with better heat exchange conditions in the heat reservoir, the heat extraction process acts more like the local thermal equilibrium process. |
| Subtype | Article |
| WOS Headings | Science & Technology ; Physical Sciences ; Technology |
| DOI | 10.1007/s00231-015-1554-y |
| WOS Subject Extended | Thermodynamics ; Mechanics |
| WOS Keyword | ENHANCED GEOTHERMAL SYSTEMS ; 3-DIMENSIONAL TRANSIENT MODEL ; ROCK ; TRANSPORT |
| Indexed By | SCI |
| Language | 英语 |
| WOS Subject | Thermodynamics ; Mechanics |
| WOS ID | WOS:000369522100009 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/11014 |
| Collection | 中国科学院广州能源研究所 |
| Affiliation | Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, Lab Adv Energy Syst, Guangzhou 510640, Guangdong, Peoples R China |
| First Author Affilication | GuangZhou Institute of Energy Conversion,Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Chen, Jiliang,Jiang, Fangming. A numerical study of EGS heat extraction process based on a thermal non-equilibrium model for heat transfer in subsurface porous heat reservoir[J]. HEAT AND MASS TRANSFER,2016,52(2):255-267. |
| APA | Chen, Jiliang,&Jiang, Fangming.(2016).A numerical study of EGS heat extraction process based on a thermal non-equilibrium model for heat transfer in subsurface porous heat reservoir.HEAT AND MASS TRANSFER,52(2),255-267. |
| MLA | Chen, Jiliang,et al."A numerical study of EGS heat extraction process based on a thermal non-equilibrium model for heat transfer in subsurface porous heat reservoir".HEAT AND MASS TRANSFER 52.2(2016):255-267. |
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