A numerical study of EGS heat extraction process based on a thermal non-equilibrium model for heat transfer in subsurface porous heat reservoir

doi:10.1007/s00231-015-1554-y

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	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
	2016-02-01
发表期刊	HEAT AND MASS TRANSFER
卷号	52 期号:2 页码:255-267
摘要	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.
文章类型	Article
WOS标题词	Science & Technology ; Physical Sciences ; Technology
DOI	10.1007/s00231-015-1554-y
研究领域[WOS]	Thermodynamics ; Mechanics
关键词[WOS]	ENHANCED GEOTHERMAL SYSTEMS ; 3-DIMENSIONAL TRANSIENT MODEL ; ROCK ; TRANSPORT
收录类别	SCI
语种	英语
WOS类目	Thermodynamics ; Mechanics
WOS记录号	WOS:000369522100009
引用统计	被引频次：16[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/11014
专题	中国科学院广州能源研究所
作者单位	Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, Lab Adv Energy Syst, Guangzhou 510640, Guangdong, Peoples R China
第一作者单位	中国科学院广州能源研究所
推荐引用方式 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.