Operational characteristics of the super-long gravity heat pipe for geothermal energy exploitation
文献类型：期刊论文
| 作者 | Chen, Juanwen2,3,4; Huang, Wenbo2,3,4; Cen, Jiwen2,3,4; Li, Zhibin2,3,4,5; Li, Feng2,3,4,5; Li, Ang1,2,3,4; Sun, Hongtao2,3,4,6; Lin, Weijie1,2,3,4; Ma, Qingshan1,2,3,4; Jiang, Fangming1,2,3,4 |
| 刊名 | APPLIED THERMAL ENGINEERING
 |
| 出版日期 | 2024-01-05 |
| 卷号 | 236页码:13 |
| 关键词 | Geothermal heat extraction Hot dry rock Super -long gravity heat pipe Single-well geothermal system |
| ISSN号 | 1359-4311 |
| DOI | 10.1016/j.applthermaleng.2023.121530 |
| 通讯作者 | Huang, Wenbo(huangwb@ms.giec.ac.cn) ; Jiang, Fangming(jiangfm@ms.giec.ac.cn) |
| 英文摘要 | As a novel geothermal heat transfer technology, the super-long gravity heat pipe (SLGHP) demonstrates great potential for the efficient exploitation of deep geothermal energy. Despite the rapid advances made to the SLGHP technology, its operational characteristics remain to be fully investigated. In this study, the underlying phenomenological mechanisms of the SLGHP are compared with those of normal-size gravity heat pipes (NSGHPs), and the operational characteristics of the SLGHP are analyzed in view of its distinctive geometric features. It is noted that the thermal resistance caused by the vapor flow is negligible in the NSGHPs, while it dominates the overall thermal resistance of the SLGHP. The dominance of the vapor flow thermal resistance allows making the one-dimensional simplification (along the pipe length direction) in the mathematical model of the SLGHP geothermal energy extraction system. Under these circumstances, the temperature gradient along the SLGHP length can be theoretically deduced based on the pressure drop of vapor flow. Close observation of the temperature gradient expression indicates that the desirable SLGHP working fluid should have the following properties: i) large latent heat of vaporization, and ii) a strong dependence of the saturated vapor pressure on the temperature. In cases where the saturated vapor pressure of the working fluid is highly dependent on the temperature, as in the case of ammonia, the working temperature profile of the SLGHP can be formulated as a linear function of the depth. This unique working temperature characteristic offers valuable guidance to determine the length of the SLGHP adiabatic section in practical geothermal applications. The on-site observed operational characteristics provide the necessary theoretical foundation for modeling the multiphase heat transfer process in SLGHP, which will lead to a valuable engineering analysis and design tool supporting the application and commercialization of the SLGHP technology. |
| WOS关键词 | DYNAMIC SIMULATION ; SYSTEM |
| 资助项目 | National Key R & D Program of China[2021YFB1507300] ; National Key R & D Program of China[2021YFB1507301] ; Na- tional Natural Science Foundation of China[52206126] ; Na- tional Natural Science Foundation of China[52206287] |
| WOS研究方向 | Thermodynamics ; Energy & Fuels ; Engineering ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001081072500001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Key R & D Program of China ; Na- tional Natural Science Foundation of China |
| 源URL | [http://ir.giec.ac.cn/handle/344007/39947]  |
| 专题 | 中国科学院广州能源研究所 |
| 通讯作者 | Huang, Wenbo; Jiang, Fangming |
| 作者单位 | 1.Univ Sci & Technol China, Sch Energy Sci & Engn, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Lab Adv Energy Syst, Guangzhou 510640, Peoples R China 3.CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China 4.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.Shenyang Univ Chem Technol, Sch Mech & Power Engn, Shenyang 110142, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Juanwen,Huang, Wenbo,Cen, Jiwen,et al. Operational characteristics of the super-long gravity heat pipe for geothermal energy exploitation[J]. APPLIED THERMAL ENGINEERING,2024,236:13. |
| APA | Chen, Juanwen.,Huang, Wenbo.,Cen, Jiwen.,Li, Zhibin.,Li, Feng.,...&Jiang, Fangming.(2024).Operational characteristics of the super-long gravity heat pipe for geothermal energy exploitation.APPLIED THERMAL ENGINEERING,236,13. |
| MLA | Chen, Juanwen,et al."Operational characteristics of the super-long gravity heat pipe for geothermal energy exploitation".APPLIED THERMAL ENGINEERING 236(2024):13. |
入库方式： OAI收割
来源：广州能源研究所
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