IGGCAS OpenIR  > 页岩气与地质工程院重点实验室
Excavation based enhanced geothermal system (EGS-E): introduction to a new concept
Zhao, J.1; Tang, C. A.2; Wang, S. J.3
2020-03-01
Source PublicationGEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
ISSN2363-8419
Volume6Issue:1Pages:7
AbstractThe current technology for enhanced geothermal system (EGS) typically involves drilling of deep injection and production wells to inject cold water into the injection well to the EGS reservoir depth, to extract heat by permeating through the fractured hot rock masses, collected by the production well and return to the surface as heated water. In this article, a new approach is proposed to develop EGS based excavation technology (EGS-E). This method consists of (1) excavation to deep rocks, including a deep shaft from surface to the EGS depth, a room-and-pillar mined cavern complex to be filled with water to become a large underground heated water reservoir in the hot rocks; (2) enhanced heat extraction from rock, aided by additional drillholes spreading out and down from the caverns, and induced fracturing of the surrounding rocks for enhanced rock-water heat transfer; (3) enclosed heat transmission from heated water reservoir to the power plant by using independent heat conducting pipes running between them, continuously supplying the heat for power generation, without water movement in the reservoir. EGS-E offers the following advantages: (1) utilizing mechanized rock excavation technology for large volume energy production; (2) greatly increasing heat extraction volume by easily extending vertically and horizontally; (3) maximize the energy transfer from hot rock to the water reservoir; and (4) separated heat transmission from heated water reservoir in EGS to power plant to minimize environmental pollution.
KeywordEnhanced geothermal system (EGS) Deep rock excavation Hot water reservoir Hot dry rock Heat transfer
DOI10.1007/s40948-019-00127-y
WOS KeywordHOT DRY ROCK ; INDUCED SEISMICITY ; CHALLENGES ; OPPORTUNITIES ; STIMULATION ; PROJECT
Language英语
WOS Research AreaEnergy & Fuels ; Engineering ; Geology
WOS SubjectEnergy & Fuels ; Engineering, Geological ; Geosciences, Multidisciplinary
WOS IDWOS:000494427500003
PublisherSPRINGER HEIDELBERG
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95736
Collection页岩气与地质工程院重点实验室
Corresponding AuthorZhao, J.
Affiliation1.Monash Univ, Dept Civil Engn, Clayton, Vic 3800, Australia
2.Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian 116024, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Zhao, J.,Tang, C. A.,Wang, S. J.. Excavation based enhanced geothermal system (EGS-E): introduction to a new concept[J]. GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES,2020,6(1):7.
APA Zhao, J.,Tang, C. A.,&Wang, S. J..(2020).Excavation based enhanced geothermal system (EGS-E): introduction to a new concept.GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES,6(1),7.
MLA Zhao, J.,et al."Excavation based enhanced geothermal system (EGS-E): introduction to a new concept".GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES 6.1(2020):7.
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