Principle and capacity quantification of deep-borehole heat exchangers

doi:10.6038/cjg20171216

	Principle and capacity quantification of deep-borehole heat exchangers
	Kong Yan-Long 1,2; Chen Chao-Fan 3; Shao Hai-Bing 3; Pang Zhong-He 1,2; Xiong Liang-Pings 1; Wang Ji-Yang 1
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2017-12-01
卷号	60 期号:12 页码:4741-4752
关键词	Deep Borehole Heat Exchanger Geothermal Energy Heat Extraction Capacity Analytical And Numerical Methods
ISSN号	0001-5733
DOI	10.6038/cjg20171216
文献子类	Article
英文摘要	Deep-Borehole Heat Exchanger (DBHE) is generally installed as a co-axial pipe in deep boreholes. The DBHE can obtain heat without extracting groundwater. Literature review shows that the specific heat extraction rate of DBHE is less than 200 W . m(-1), which is much smaller than that by conventional hydrothermal exploitation systems. Using both analytical and numerical methods, we evaluated the capacity of DBHE with representative parameters in northern China. Three modeling scenarios were constructed using the simulator OpenGeoSys, including (1) shortterm (4 months) continuous heat extraction; (2) short-term heat extraction with half-day intervals and (3) long-term (30 years) continuous heat extraction. Results show that the sustainable heat extraction rates in all continuous extraction scenarios are less than 150 W.m(-1). While in the intermittent scenario, the rate could be doubled, but will lead to larger fluctuations in the outflow temperature. Sensitivity analysis indicates that the depth of borehole is not a significant influencing factor to the heat extraction rate, while the heat conductivity of surrounding formation is critical. Finally, we point out that the basic need in order to increase the specific heat extraction rate of a DBHE is to increase the convection in the surrounding formation, or in other words, the contact area between circulation water and formation.
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000418626400016
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/82360]
专题	中国科学院地质与地球物理研究所
通讯作者	Shao Hai-Bing
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.UFZ Helmholtz Ctr Environm Res, D-04318 Leipzig, Germany
推荐引用方式 GB/T 7714	Kong Yan-Long,Chen Chao-Fan,Shao Hai-Bing,et al. Principle and capacity quantification of deep-borehole heat exchangers[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2017,60(12):4741-4752.
APA	Kong Yan-Long,Chen Chao-Fan,Shao Hai-Bing,Pang Zhong-He,Xiong Liang-Pings,&Wang Ji-Yang.(2017).Principle and capacity quantification of deep-borehole heat exchangers.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,60(12),4741-4752.
MLA	Kong Yan-Long,et al."Principle and capacity quantification of deep-borehole heat exchangers".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 60.12(2017):4741-4752.