空气布雷顿循环系统不同构型参数分析及优化  

Parameter Analysis and Optimization of Air Brayton Cycle System Different Configurations

作　　者：唐鑫 钱奕然 陈伟雄[1] 方华伟 易经纬[2] 严俊杰[1] TANG Xin;QIAN Yiran;CHEN Weixiong;FANG Huawei;YI Jingwei;YAN Junjie(State Key Laboratory of Multiphase Flow in Power Engineering(Xi’an Jiaotong University),Xi’an 710049,Shaanxi Province,China;Science and Technology on Reactor System Design Technology Laboratory(Nuclear Power Institute of China),Chengdu 610041,Sichuan Province,China)

机构地区：[1]动力工程多相流国家重点实验室(西安交通大学),陕西省西安市710049 [2]核反应堆系统设计技术重点实验室(中国核动力研究设计院),四川省成都市610041

出　　处：《中国电机工程学报》2023年第21期8344-8355,共12页Proceedings of the CSEE

基　　金：核反应堆系统设计技术重点实验室运行基金(LRSDT2021403);中核集团领创科研项目(202104)。

摘　　要：空气布雷顿循环技术成熟度高,环境适应性强,应用于可移动微小型可电源能量转换系统有待进一步选型设计。该文通过建立闭式空气布雷顿循环系统模型,探究不同循环构型关键参数对系统性能影响规律,并分别以最大循环效率和最大功率密度为目标对不同构型进行参数优化。结果表明,采用级间冷却和再热能提高系统发电效率和(火用)效率,但会增大系统体积,使功率密度下降;以发电效率最大作为优化目标,最优构型是再热间冷回热循环,其发电效率可以达到37.95%,但其功率密度较低,仅为206.9kW/m^(3);以功率密度最大作为优化目标,最优构型是简单回热循环,其功率密度可以达到336.7kW/m^(3),换热器体积仅为4.36m^(3),但其发电效率只有29.4%,低于其他构型。因此,以最大功率密度为目标优化后的简单回热空气布雷顿循环更适合作为可移动微小型核电源能量转换系统应用。The air Brayton cycle technology exhibits a high level of maturity and strong environmental adaptability,making it a promising candidate for further selection and design in the context of portable and micro-scale power energy conversion systems.This study establishes a closed-loop air Brayton cycle system model to investigate the influence of key parameters in different cycle configurations on system performance.Parameter optimization is conducted with objectives of maximizing cycle efficiency and maximizing power density for various configurations.The results indicate that the use of inter-stage cooling and reheating can enhance the system's electricity generation efficiency and thermodynamic efficiency,but it leads to an increase in system volume,resulting in reduced power density.When maximizing electricity generation efficiency is the optimization objective,the optimal configuration is the reheating intercooling Brayton cycle,which achieves an electricity generation efficiency of 37.95%,albeit with a lower power density of only 206.9kW/m^(3).On the other hand,when maximizing power density is the optimization goal,the optimal configuration is the simple reheating cycle,which achieves a power density of 336.7kW/m^(3) with a compact heat exchanger volume of only 4.36m^(3) but at the cost of lower electricity generation efficiency,standing at 29.4%compared to other configurations.Consequently,the simple reheating air Brayton cycle,optimized for maximum power density,is better suited for application in portable and micro-scale nuclear power energy conversion systems.

关 键 词：空气布雷顿循环 构型对比 参数优化 发电效率 功率密度 

分 类 号：TM613[电气工程—电力系统及自动化]