氦氙布雷顿循环系统工质热物性及热力性能研究  

Analysis on thermophysical property and thermodynamic performance of He-Xe Brayton cycle system

作　　者：赵正成 罗皓天 赵亚楠 于涛[1,2] ZHAO Zhengcheng;LUO Haotian;ZHAO Yanan;YU Tao(School of Nuclear Science and Technology,University of South China,Hengyang 421001,China;Key Laboratory of Advanced Nuclear Energy Design and Safety,Ministry of Education,Hengyang 421001,China)

机构地区：[1]南华大学核科学技术学院,衡阳421001 [2]先进核能设计与安全教育部重点实验室,衡阳421001

出　　处：《核技术》2025年第4期158-171,共14页Nuclear Techniques

基　　金：国家自然科学基金(No.12205142);湖南省自然科学基金(No.2023JJ40526)资助。

摘　　要：兆瓦级核反应堆结合氦氙布雷顿循环系统能有效满足大型深空探测器、星表基地、深海无人潜航器等特种能源动力装置对大功率、小型化、高可靠电源供应的需求,具有广阔的应用前景和研究价值。目前对氦氙混合气体在非理想状态下的物性研究尚不充分,本文构建了非理想状态下氦氙混合气体的物性计算模型,采用浸没式次临界安全空间反应堆氦氙布雷顿循环系统为研究对象,对氦氙混合气体物性模型进行了验证,分析了不同温度、压力和氦气摩尔分数下氦氙混合气体的物性对绝热系数、相对压损和相对对流换热系数等氦氙布雷顿循环系统热力性能关键参数的影响规律及对热力设备选型的影响。[Background]Megawatt-level nuclear reactor combined with helium-xenon Brayton cycle system can effectively meet the energy needs of large-scale deep space explorers,satellite base,deep-sea unmanned underwater vehicle and other special energy power equipment for high power,small size,highly reliable power supply,which has wide application foreground and research necessity.Currently,the study of the physical properties of helium-xenon gas mixtures in non-ideal state is not sufficient.[Purpose]This study aims to establish the thermophysical property model and the thermodynamic model of helium-xenon Brayton cycle,and analyze the effect of the non-ideal gas characteristics to the thermal performance of the cycle.[Methods]The second or third order virial expansion was adopted to construct the helium-xenon mixture physical property model to reflect the deviation caused by the non-ideal gas characteristics.The thermodynamic models of turbine,compressor,mixing chamber,and heat exchanger were conducted on the basis of thermophysical property model.Then,the function models of efficiency and specific work were derived from the thermodynamic models of the above main components,and verified by the submerged subcritical safe space reactor(S4)design.Finally,the influence of the thermophysical properties of helium-xenon mixture on thermal performance of helium-xenon Brayton cycle system such as adiabatic coefficient,pressure loss and relative convective heat transfer coefficient at different temperature,pressure and molar fraction of helium was analyzed,and the influence of He-Xe mixing ratio on the He-Xe thermophysical property under different temperature and pressure was explored.[Results]The second or third order virial expansion was adopted to construct the helium xenon mixture physical property model to reflect the deviation caused by the non-ideal gas characteristics.The thermodynamic models of turbine,compressor,mixing chamber,and heat exchanger were conducted on the basis of thermophysical property model.Then,the function

关 键 词：氦氙混合气体 物性 布雷顿循环 热力性能 核反应堆电源 

分 类 号：TL333[核科学技术—核技术及应用]