Super-long gravity heat pipe geothermal space heating system: A practical case in Taiyuan, China
文献类型：期刊论文
| 作者 | Chen, Juanwen1; Li, Zhibin1,2; Huang, Wenbo1; Ma, Qingshan1,3; Li, Ang1,3; Wang, Bin1,4; Sun, Hongtao1,4; Jiang, Fangming1,3 |
| 刊名 | ENERGY
 |
| 出版日期 | 2024-07-15 |
| 卷号 | 299页码:10 |
| 关键词 | Super -long gravity heat pipe Geothermal heat extraction Crossflow Space heating Earth -deep geothermal energy |
| ISSN号 | 0360-5442 |
| DOI | 10.1016/j.energy.2024.131521 |
| 通讯作者 | Huang, Wenbo(huangwb@ms.giec.ac.cn) ; Jiang, Fangming(jiangfm@ms.giec.ac.cn) |
| 英文摘要 | Using super-long gravity heat pipes (SLGHPs) to exploit deep-earth geothermal energy has indicated its technical superiority and viability; yet there is no practical application so far. The present work reports an SLGHP geothermal space heating system constructed in Taiyuan, China, which has two SLGHPs (2020 m and 2180 m long, respectively) in combination with a single heat pump. The two wells are located only -30 m apart, and the well-log temperature at 2000 m depth is around 63 degrees C for both. Temperatures measured by the optical fiber arranged along the SLGHP outer wall show remarkable uniformity, indicating the good performance of SLGHPs. Testing with the SLGHP system finds that the slightly longer SLGHP extracts 70 % more heat than the other one. Analyses reveal that the heat transfer in the geothermal formations surrounding the shorter SLGHP approximately follows the heat conduction regime while the convection of groundwater contributes less; the high yield of the slightly longer SLGHP is due to an interesting downhole heat transfer enhancement mechanism arising from the interlayer crossflow of groundwater. Further, a numerical model is developed to predict the SLGHP geothermal system's performance in 120-days' operation. It is found that this system can output 1 MW of heat, sufficing space heating of -25,000 m2 buildings. The simulated 20-years' operation indicates the thermal output degradation is 20.4 % for the shorter SLGHP, whereas it is only 6.8 % for the slightly longer SLGHP; the downhole groundwater crossflow lowers the SLGHP system degradation rate. |
| WOS关键词 | EXCHANGER ; FLOW ; WELL |
| 资助项目 | National Key R&D Program of China[2021YFB1507300] ; National Key R&D Program of China[2021YFB1507301] ; National Natural Science Foundation of China[52206126] ; National Natural Science Foundation of China[52206287] ; Jiangyin Science and Technology Innovation Special Fund[JY0604A021015210001PB] ; Jiangsu Provincial Carbon Peak Carbon Neutralization Technology Innovation Special Fund[BE2022012] |
| WOS研究方向 | Thermodynamics ; Energy & Fuels |
| 语种 | 英语 |
| WOS记录号 | WOS:001242047500002 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Key R&D Program of China ; National Natural Science Foundation of China ; Jiangyin Science and Technology Innovation Special Fund ; Jiangsu Provincial Carbon Peak Carbon Neutralization Technology Innovation Special Fund |
| 源URL | [http://ir.giec.ac.cn/handle/344007/42162]  |
| 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.Chinese Acad Sci, Guangzhou Inst Energy Convers, Lab Adv Energy Syst, Guangdong Key Lab New & Renewable Energy Res & Dev, Guangzhou 510640, Guangdong, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Sci & Technol China, Sch Energy Sci & Engn, Hefei 230026, Peoples R China 4.Shenyang Univ Chem Technol, Sch Mech & Power Engn, Shenyang 110142, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Juanwen,Li, Zhibin,Huang, Wenbo,et al. Super-long gravity heat pipe geothermal space heating system: A practical case in Taiyuan, China[J]. ENERGY,2024,299:10. |
| APA | Chen, Juanwen.,Li, Zhibin.,Huang, Wenbo.,Ma, Qingshan.,Li, Ang.,...&Jiang, Fangming.(2024).Super-long gravity heat pipe geothermal space heating system: A practical case in Taiyuan, China.ENERGY,299,10. |
| MLA | Chen, Juanwen,et al."Super-long gravity heat pipe geothermal space heating system: A practical case in Taiyuan, China".ENERGY 299(2024):10. |
入库方式： OAI收割
来源：广州能源研究所
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