Anisotropic heat characteristics and analysis of molten salt thermocline storage system
文献类型：期刊论文
| 作者 | Lu, Jianfeng4; Ding, Jing4; Wang, Weilong4; Zhang, Yuanyuan1,2,3 |
| 刊名 | JOURNAL OF ENERGY STORAGE
 |
| 出版日期 | 2024-04-15 |
| 卷号 | 84页码:9 |
| 关键词 | Solar thermal power Heat storage Anisotropic heat transfer Molten salt Heat discharging efficiency |
| ISSN号 | 2352-152X |
| DOI | 10.1016/j.est.2024.110773 |
| 通讯作者 | Lu, Jianfeng(lujfeng@mail.sysu.edu.cn) ; Zhang, Yuanyuan(zhangyy@ms.giec.ac.cn) |
| 英文摘要 | Molten salt thermocline storage system is a promising heat storage technology for solar energy utilization, but the system with anisotropic heat transfer packed-bed is seldom studied. In present article, molten salt thermocline storage system with anisotropic heat transfer packed-bed is first proposed and numerically analyzed to improve discharging efficiency. In anisotropic system, molten salt temperature distribution including thermocline is similar to that of isotropic system, and temperature difference between molten salt and solid fillers is mainly determined by average solid thermal conductivity, while thermocline thickness and discharging performance are affected by axial heat diffusion and fluid-solid heat transfer. As axial solid thermal conductivity increases, effective discharging time and efficiency first increase with fluid-solid heat transfer enhancement, and then decrease with axial heat diffusion and thermocline thickness increasing. In present system, effective discharging time and efficiency reach their maximum value of 2.96 h and 89.45 %, and effective discharging efficiency can be increased 5.22 % with optimal axial solid thermal conductivity of 10 W/(mK). As radial solid thermal conductivity increases, heat diffusion in radial direction accelerates and that in axial direction slightly decelerates with thermocline thickness decreasing, and fluid-solid heat transfer is also enhanced, so effective heat discharging efficiency can be increased 6.56 %. As a conclusion, axial solid thermal conductivity should be optimized to a low value to reduce thermocline thickness, while radial solid thermal conductivity should be improved to enhance fluid-solid heat transfer. |
| WOS关键词 | THERMAL-ENERGY STORAGE ; PERFORMANCE ; SENSITIVITY ; PCM |
| 资助项目 | National Natural Science Foundation of China[42102336] ; National Natural Science Foundation of China[U22A20213] ; National Natural Science Foundation of China[52036011] |
| WOS研究方向 | Energy & Fuels |
| 语种 | 英语 |
| WOS记录号 | WOS:001182666400001 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.giec.ac.cn/handle/344007/41213]  |
| 专题 | 中国科学院广州能源研究所 |
| 通讯作者 | Lu, Jianfeng; Zhang, Yuanyuan |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 2.CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China 3.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 4.Sun Yat Sen Univ, Sch Mat Sci & Engn, Guangzhou 510006, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lu, Jianfeng,Ding, Jing,Wang, Weilong,et al. Anisotropic heat characteristics and analysis of molten salt thermocline storage system[J]. JOURNAL OF ENERGY STORAGE,2024,84:9. |
| APA | Lu, Jianfeng,Ding, Jing,Wang, Weilong,&Zhang, Yuanyuan.(2024).Anisotropic heat characteristics and analysis of molten salt thermocline storage system.JOURNAL OF ENERGY STORAGE,84,9. |
| MLA | Lu, Jianfeng,et al."Anisotropic heat characteristics and analysis of molten salt thermocline storage system".JOURNAL OF ENERGY STORAGE 84(2024):9. |
入库方式： OAI收割
来源：广州能源研究所
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