A supercritical carbon dioxide cycle efficiency analysis
-
摘要: 以超临界二氧化碳简单回热型布雷顿循环为研究对象，以核电站为应用背景，详细论述了系统循环模型与关键器部件的效率模型建立方法，并利用该模型初步分析了各类工程因素对布雷顿循环效率、系统体积的影响，分析结果表明，循环效率、系统体积对温度、压力、涡轮机械效率、回热器等参数的敏感性存在较大差异，其中增加透平入口温度对缩减系统总体积最为有效，需要建立完善的系统分析模型以进行S-CO2系统的优化设计。Abstract: The supercritical carbon dioxide (S-CO2) Brayton cycle is a new type of power generation technology with broad application prospects. This paper takes the supercritical carbon dioxide simple Brayton cycle with recuperation as the research object, and takes the nuclear power plant as the application background. The system cycle model and the efficiency model of the key components is discussed in detail. Based on this model, the influence of various engineering factors on the efficiency of the Brayton cycle and the volume of the system has been discussed. The analysis results show that the sensitivity of cycle efficiency and system volume to parameters such as temperature, pressure, turbomachinery efficiency and regenerator design differs obviously, and the most effective method to reduce the system volume is increasing the turbine inlet temperature. It is necessary to establish a complete system analysis model to optimize the design of the S-CO2 system.
-
Key words:
- supercritical carbon dioxide /
- Brayton cycle /
- conversion efficiency /
- recuperator /
- turbine
-
图 6 提高透平入口温度带来的效率提升
Figure 6. Efficiency increases with increasing turbine inlet temperature
图 7 提高压缩机出口压力带来的效率提升
Figure 7. Efficiency increase due to increased compressor outlet pressure
-
[1] Liu Yaping, Wang Ying, Huang Diangui. Supercritical CO2 Brayton cycle: a state-of-the-art review[J]. Energy, 2019, 189: 115900. doi: 10.1016/j.energy.2019.115900 [2] 叶侠丰, 潘卫国, 尤运, 等. 超临界二氧化碳布雷顿循环在发电领域的应用[J]. 电力与能源, 2017, 38(3):343-347. (Ye Xiafeng, Pan Weiguo, You Yun, et al. Application of supercritical carbon dioxide Brayton cycle in power generation fields[J]. Power & Energy, 2017, 38(3): 343-347 [3] 吴攀, 高春天, 单建强. 超临界二氧化碳布雷顿循环在核能领域的应用[J]. 现代应用物理, 2019, 10:031202. (Wu Pan, Gao Chuntian, Shan Jianqiang. Application of supercritical carbon dioxide Brayton cycle in nuclear engineering[J]. Modern Applied Physics, 2019, 10: 031202 [4] 郑开云. 超临界二氧化碳布雷顿循环效率分析[J]. 发电设备, 2017, 31(5):305-309. (Zheng Kaiyun. Efficiency analysis for supercritical carbon dioxide Brayton cycles[J]. Power Equipment, 2017, 31(5): 305-309 doi: 10.3969/j.issn.1671-086X.2017.05.001 [5] 段承杰, 杨小勇, 王捷. 超临界二氧化碳布雷顿循环的参数优化[J]. 原子能科学技术, 2011, 45(12):1489-1494. (Duan Chengjie, Yang Xiaoyong, Wang Jie. Parameters optimization of supercritical carbon dioxide Brayton cycle[J]. Atomic Energy Science and Technology, 2011, 45(12): 1489-1494 [6] Bell I H, Quoilin S, Wronski J, et al. CoolProp: An open-source reference-quality thermophysical property library[C]//ASME ORC 2nd International Seminar on ORC Power Systems. 2013. [7] Witte F, Tuschy I. TESPy: Thermal Engineering Systems in Python[J]. Journal of Open Source Software, 2020, 5: 2178. doi: 10.21105/joss.02178 [8] Dostal V. A supercritical carbon dioxide cycle for next generation nuclear reactors[D]. Cambridge: Massachusetts Institute of Technology, 2004. [9] Gibbs J P. Power conversion system design for supercritical carbon dioxide cooled indirect cycle nuclear reactors[D]. Cambridge: Massachusetts Institute of Technology, 2008. [10] Balje O E. Turbomachines: A guide to design, selection and theory[M]. Hoboken: John Wiley & Sons, 1981. [11] Sondelski B, Nellis G. Mass optimization of a supercritical CO2 Brayton cycle with a direct cooled nuclear reactor for space surface power[J]. Applied Thermal Engineering, 2019, 163: 114299. doi: 10.1016/j.applthermaleng.2019.114299 [12] Liao S M, Zhao T S. Measurements of heat transfer coefficients from supercritical carbon dioxide flowing in horizontal Mini/Micro channels[J]. Journal of Heat Transfer, 2002, 124(3): 413-420. doi: 10.1115/1.1423906 -
下载:
点击查看大图
图(10)
计量
- 文章访问数: 1247
- HTML全文浏览量: 313
- PDF下载量: 61
- 被引次数: 0
