Centrifugal Pressurization Process in the Near Critical Region for Supercritical CO2 Brayton Cycle
文献类型：期刊论文
| 作者 | Shi, Weixiu2; Ji, Xueyuan2; Pan LS(潘利生)1; Sun, Yin2; Li, Chaoqi2; Wei XL(魏小林)1 |
| 刊名 | JOURNAL OF THERMAL SCIENCE
 |
| 出版日期 | 2025-07-23 |
| 页码 | 13 |
| 关键词 | CO2 power cycle pressurization component near-critical region liquid hammer |
| ISSN号 | 1003-2169 |
| DOI | 10.1007/s11630-025-2188-0 |
| 通讯作者 | Pan, Lisheng(panlisheng@imech.ac.cn) |
| 英文摘要 | The starting point for the pressurization process of a supercritical CO2 Brayton cycle is near the critical point, which may lead to a liquid hammer if the inlet pressure fluctuates. It is important to judge whether the phase change of working fluid occurs during the pressurization process. With CO2 as the working fluid, the pressurization process for a centrifugal pressurization component is attention considered and analyzed. Specifying the inlet temperature, inlet pressure and outlet pressure as 32 degrees C, 7.4 MPa and 24 MPa, respectively, the thermodynamic parameters of key state points of a centrifugal pressurization component are obtained. At the entrance of the impeller, a phase change of CO2 may occur, especially when the inlet points are close to the critical point. A method using enthalpy difference and exergy difference to express the possibility CO2 phase change is proposed. Furthermore, the risk degree of CO2 phase change is represented visibly. In view of the power consumption and efficiency of compressors under different working conditions, the changes of power consumption, isentropic efficiency and internal efficiency of compression components were analyzed under the conditions of constant outlet pressure and constant pressurization ratio. The power consumption is affected by the specific volume of the working fluid and the pressure difference. With the same inlet conditions, the isentropic efficiency under constant pressurization ratio is higher than that under a constant outlet pressure due to the lower power consumption; the internal efficiency is higher than the isentropic efficiency, and the trend is similar. This method can contribute to the setting of safe conditions for pressurization components. |
| 分类号 | 二类 |
| 资助项目 | National Natural Science Foundation of China[51776215] ; National Natural Science Foundation of China[12372237] |
| WOS研究方向 | Thermodynamics ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001533638200001 |
| 资助机构 | National Natural Science Foundation of China |
| 其他责任者 | 潘利生 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/102098]  |
| 专题 | 力学研究所_高温气体动力学国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, Beijing 100190, Peoples R China 2.Beijing Univ Civil Engn & Architecture, Sch Environm & Energy Engn, Beijing 100044, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Shi, Weixiu,Ji, Xueyuan,Pan LS,et al. Centrifugal Pressurization Process in the Near Critical Region for Supercritical CO2 Brayton Cycle[J]. JOURNAL OF THERMAL SCIENCE,2025:13. |
| APA | Shi, Weixiu,Ji, Xueyuan,潘利生,Sun, Yin,Li, Chaoqi,&魏小林.(2025).Centrifugal Pressurization Process in the Near Critical Region for Supercritical CO2 Brayton Cycle.JOURNAL OF THERMAL SCIENCE,13. |
| MLA | Shi, Weixiu,et al."Centrifugal Pressurization Process in the Near Critical Region for Supercritical CO2 Brayton Cycle".JOURNAL OF THERMAL SCIENCE (2025):13. |
入库方式： OAI收割
来源：力学研究所
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