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Experimental Study of the Heat-Transfer Performance of an Extra-Long Gravity-Assisted Heat Pipe Aiming at Geothermal Heat Exploitation

文献类型：期刊论文

作者Cen, Jiwen2,3,4; Li, Feng1,2,3,4; Li, Tingliang1,2,3,4; Huang, Wenbo2,3,4; Chen, Juanwen2,3,4; Jiang, Fangming2,3,4
刊名SUSTAINABILITY
出版日期2021-11-01
卷号13期号:22页码:16
关键词super-long gravity heat pipe geothermal energy exploitation phase-change heat transfer two phase flow length-diameter ratio
DOI10.3390/su132212481
通讯作者Jiang, Fangming(fm_jiang2000@yahoo.com)
英文摘要The installation and operation of enhanced geothermal systems (EGS) involves many challenges. These challenges include the high cost and high risk associated with the investment capital, potential large working-fluid leakage, corrosion of equipment, and subsiding land. A super-long heat pipe can be used for geothermal exploitation to avoid these problems. In this paper, a high aspect-ratio heat pipe (30 m long, 17 mm in inner diameter) is installed vertically. Experiments are then carried out to study its heat-transfer performance and characteristics using several filling ratios of deionized water, different heating powers, and various cooling-water flowrates. The results show that the optimal filling-ratio is about 40% of the volume of the vaporizing section of the heat pipe. Compared with a conventional short heat pipe, the extra-long heat pipe experiences significant thermal vibration. The oscillation frequency depends on the heating power and working-fluid filling ratio. With increasing cooling-water flow rate, the heat-transfer rate of the heat pipe increases before it reaches a plateau. In addition, we investigate the heat-transfer performance of the heat pipe for an extreme working-fluid filling ratio; the results indicate that the lower part of the heat pipe is filled with vapor, which reduces the heat-transfer to the top part. Based on the experimental data, guidelines for designing a heat pipe that can be really used for the exploitation of earth-deep geothermal energy are analyzed.
WOS关键词ENERGY
资助项目China National Key RD Projects[2018YFB1501804] ; China National Key RD Projects[2019YFB1504104] ; Chinese Academy of Sciences Strategic-A Pilot Project[XDA21060700]
WOS研究方向Science & Technology - Other Topics ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000727339300001
出版者MDPI
资助机构China National Key RD Projects ; Chinese Academy of Sciences Strategic-A Pilot Project
源URL[http://ir.giec.ac.cn/handle/344007/35485]  
专题中国科学院广州能源研究所
通讯作者Jiang, Fangming
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China
3.CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China
4.Chinese Acad Sci, Guangzhou Inst Energy Convers, Lab Adv Energy Syst, Guangzhou 510640, Peoples R China
推荐引用方式
GB/T 7714		 Cen, Jiwen,Li, Feng,Li, Tingliang,et al. Experimental Study of the Heat-Transfer Performance of an Extra-Long Gravity-Assisted Heat Pipe Aiming at Geothermal Heat Exploitation[J]. SUSTAINABILITY,2021,13(22):16.
APA Cen, Jiwen,Li, Feng,Li, Tingliang,Huang, Wenbo,Chen, Juanwen,&Jiang, Fangming.(2021).Experimental Study of the Heat-Transfer Performance of an Extra-Long Gravity-Assisted Heat Pipe Aiming at Geothermal Heat Exploitation.SUSTAINABILITY,13(22),16.
MLA Cen, Jiwen,et al."Experimental Study of the Heat-Transfer Performance of an Extra-Long Gravity-Assisted Heat Pipe Aiming at Geothermal Heat Exploitation".SUSTAINABILITY 13.22(2021):16.

入库方式： OAI收割

来源：广州能源研究所

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