Heat extraction from hot dry rock by super-long gravity heat pipe: A field test

doi:10.1016/j.energy.2022.123492

GIEC OpenIR

	Heat extraction from hot dry rock by super-long gravity heat pipe: A field test
	Huang, Wenbo 1; Cen, Jiwen1 ; Chen, Juanwen 1; Cao, Wenjiong 1; Li, Zhibin 1,2; Li, Feng 1,2; Jiang, Fangming1
	2022-05-15
发表期刊	ENERGY
ISSN	0360-5442
卷号	247 页码:12
通讯作者	Chen, Juanwen(chenjw@ms.giec.ac.cn) ; Jiang, Fangming(fm_jiang2000@yahoo.com)
摘要	Recent theoretical studies dealing with the novel scheme for earth-deep hot dry rock geothermal energy extraction based on the use of a super-long heat pipe indicate its superior technical viability. The present work reports on a field test using a 3000-m heat pipe to extract hot dry rock geothermal energy conducted with the aim of demonstrating its practical feasibility. The in-house developed heat pipe uses deionized water as working fluid and produces steam with a maximum temperature of similar to 90 degrees C, when the average underground formation temperature around the subsurface heat pipe is 95.6 degrees C. During the 30day continuous heat mining process, the heat extraction rate achieved an average value of 190 kW with no obvious downward trend. After one month of continuous heat production, a one-week heat recovery can restore the system temperature to just slightly lower than the initial value. The thermal response of the system to different condensing temperatures was also tested. The results show that the heat extraction rate can be increased by decreasing the condensing temperature, but this improvement is insignificant when the condensing temperature is 55 degrees C or lower. Furthermore, the experimental results show overall good agreement with the model predictions, which indicates that the heat pipe is performing close to the desired operating conditions considered in the simulation model, in particular: no liquid accumulation, no local dry-out, and no vapor-liquid entrainment. This performance is a major departure from that of the typical heat pipes, and it makes the super-long gravity heat pipe a leading technological candidate for earth-deep geothermal heat extraction. (C) 2022 Elsevier Ltd. All rights reserved.
关键词	Hot dry rock Geothermal energy Super long heat pipe Heat extraction Field test
DOI	10.1016/j.energy.2022.123492
关键词[WOS]	GEOTHERMAL-ENERGY ; PERFORMANCE ; SYSTEM ; WELLS
收录类别	SCI
语种	英语
资助项目	Chinese Academy of Sciences Strategic-A Pilot Project[XDA21060700] ; Chinese Academy of Sciences Key Laboratory of Renewable Energy[E0290302] ; Guangzhou Science and Technology Plan Project[202102020245] ; Hebei Provincial Department of Science and Technology[19274102D] ; Hebei Provincial Department of Science and Technology[20374102D]
WOS研究方向	Thermodynamics ; Energy & Fuels
项目资助者	Chinese Academy of Sciences Strategic-A Pilot Project ; Chinese Academy of Sciences Key Laboratory of Renewable Energy ; Guangzhou Science and Technology Plan Project ; Hebei Provincial Department of Science and Technology
WOS类目	Thermodynamics ; Energy & Fuels
WOS记录号	WOS:000819868800008
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：14[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/344007/36959
专题	中国科学院广州能源研究所
通讯作者	Chen, Juanwen; Jiang, Fangming
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Lab Adv Energy Syst,CAS Key Lab Renewable Energy, Guangdong Key Lab New & Renewable Energy Res & De, Guangzhou 510640, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, 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	Huang, Wenbo,Cen, Jiwen,Chen, Juanwen,et al. Heat extraction from hot dry rock by super-long gravity heat pipe: A field test[J]. ENERGY,2022,247:12.
APA	Huang, Wenbo.,Cen, Jiwen.,Chen, Juanwen.,Cao, Wenjiong.,Li, Zhibin.,...&Jiang, Fangming.(2022).Heat extraction from hot dry rock by super-long gravity heat pipe: A field test.ENERGY,247,12.
MLA	Huang, Wenbo,et al."Heat extraction from hot dry rock by super-long gravity heat pipe: A field test".ENERGY 247(2022):12.