辛嘉俊,张任平

• 1:景德镇陶瓷大学材料科学与工程学院

摘要(Abstract)：

超临界二氧化碳（S-CO_2）印刷电路板式换热器（PCHE）在布雷顿循环发电系统中被广泛应用，但PCHE在不同工况下却面临着传热不均、综合性能差等问题。为提高PCHE在布雷顿循环中的综合性能，采用数值模拟方法，以S-CO_2作为流体工质，通过改变渐缩渐扩节距周期T、渐缩渐扩截面比β和渐缩长度与渐扩长度之比γ，研究了不同参数PCHE中冷侧和热侧S-CO_2的综合性能。结果表明：当β和γ为定值时，冷侧节距周期大小与综合性能呈反比，热侧节距周期最优值为15～25 mm；应用了渐缩渐扩节距周期PCHE的综合性能值均大于1，即该结构性能优于传统直流道，相对于热侧8.5 MPa的工作压力，在冷侧22 MPa的工作压力下PCHE的综合性能较高；渐缩渐扩截面比大于1时，综合性能值均大于1，流体与壁面之间的对流换热更剧烈，综合性能得到强化；当其他条件一定，渐缩长度与渐扩长度之比γ为3/7时，系统的综合性能较好。研究结果为渐变截面流道PCHE综合性能的优化提供了参考依据。

关键词(KeyWords)： 印刷电路板式换热器;渐缩渐扩流道;超临界二氧化碳;布雷顿循环;数值模拟

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目（52466004）;; 景德镇市科技计划项目（2023GY001-10,20202GYZD013-21）;; 景德镇陶瓷大学研究生创新专项资金项目（JYC202436）~~

作者(Author): 辛嘉俊,张任平

DOI: 10.19666/j.rlfd.202502047

参考文献(References)：

• [1]郭瑞阳,杨红义,庄毅,等.超临界二氧化碳布雷顿循环系统关键参数对循环效率的影响研究[J].核科学与工程, 2024, 44(5):1018-1029.GUO Ruiyang, YANG Hongyi, ZHUANG Yi, et al. Study on influence of key parameters of supercritical carbon dioxide Brayton cycle system on cycle efficiency[J].Nuclear Science and Engineering, 2024, 44(5):1018-1029.
• [2] LI Y, FU Y, ZHANG J, et al. Investigation of heat transfer performance and enhancement mechanisms of supercritical carbon dioxide in PCHE with fractal airfoil fins[J]. Case Studies in Thermal Engineering, 2024, 60:104802.
• [3] LIN M, GUO C, LI Z, et al. Impact of pipe resistance on performance of supercritical carbon dioxide Brayton cycle system[J]. Case Studies in Thermal Engineering, 2024,60:104711.
• [4]李显文.印刷电路板式换热器中液态铅铋与超临界二氧化碳流动换热特性研究[D].兰州:中国科学院近代物理研究所, 2024:1.LI Xianwen. Research on flow and heat transfer characteristics of liquid lead-bismuth eutectic and supercritical carbon dioxide in printed circuit heat exchanger[D]. Lanzhou:University of Chinese Academy of Sciences, 2024:1.
• [5]纪宇轩,邢凯翔,岑可法,等.超临界二氧化碳布雷顿循环研究进展[J].动力工程学报, 2022, 42(1):1-9.JI Yuxuan, XING Kaixiang, CEN Kefa, et al. A review on supercritical carbon dioxide Brayton cycle[J]. Journal of Chinese Society of Power Engineering, 2022, 42(1):1-9.
• [6] CHEN J, TAN S, E J, et al. Dynamic performance and control analysis of supercritical CO2 Brayton cycle for solid oxide fuel cell waste heat recovery[J]. Applied Thermal Engineering, 2024, 250:123556.
• [7] ZAHARIL A H, YANG H. Thermodynamic analysis of a parabolic trough power plant integrating supercritical carbon dioxide Brayton cycle and direct contact membrane distillation[J]. Applied Thermal Engineering,2024, 252:123637.
• [8]钟鸣,占园根,孙健,等.阵列式多孔微射流热沉结构优化及传热特性研究[J].陶瓷学报, 2023, 44(3):581-589.ZHONG Ming, ZHAN Yuangen, SUN Jian, et al.Structure optimization and heat transfer characteristics of holes array microjet heat sink[J]. Journal of Ceramics,2023, 44(3):581-589.
• [9]张任平,周祖祥,黄菊,等.辊道窑尾部热交换器传热特性及涡流强化[J].陶瓷学报, 2024, 45(4):812-820.ZHANG Renping, ZHOU Zuxiang, HUANG Ju, et al.Heat transfer characteristics and eddy current enhancement of heat exchange at the end of roller kiln[J].Journal of Ceramics, 2024, 45(4):812-820.
• [10] XIN F, MA T, CHEN Y, et al. Study on chemical spray etching of stainless steel for printed circuit heat exchanger channels[J]. Nuclear Engineering and Design, 2019, 341:91-99.
• [11] YUAN P, TIAN H, WANG X, et al. A print circuit heat exchanger design method based on vortex field optimization of disturbance generator[J]. International Journal of Thermal Sciences, 2025, 208:109498.
• [12]唐凌虹,杨博皓,李文军.轴向导热对印刷电路板式换热器换热性能影响[J].工程热物理学报, 2022,43(4):1055-1062.TANG Linghong, YANG Bohao, LI Wenjun. Effect of axial heat conduction on thermal performance in a printed circuit heat exchange[J]. Journal of Engineering Thermophysics, 2022, 43(4):1055-1062.
• [13] MESHRAM A, JAISWAL K A, KHIVSARA D S, et al.Modeling and analysis of a printed circuit heat exchanger for supercritical CO2 power cycle applications[J]. Applied Thermal Engineering, 2016, 109:861-870.
• [14] LV Y G, WEN Z X, LI Q, et al. Numerical investigation on thermal hydraulic performance of hybrid wavy channels in a supercritical CO2 precooler[J]. International Journal of Heat and Mass Transfer, 2021, 181:121891.
• [15] WEN Z, LV Y, LI Q, et al. Numerical study on heat transfer behavior of wavy channel supercritical CO2printed circuit heat exchangers with different amplitude and wavelength parameters[J]. International Journal of Heat and Mass Transfer, 2020, 147:118922.
• [16]李德波,靳万龙,陈兆立,等.通道高度对翼型翅片印刷电路板换热器流动传热性能的影响[J].动力工程学报, 2024, 44(6):837-843.LI Debo, JIN Wanlong, CHEN Zhaoli, et al. Effects of channel height on the thermal-hydraulic performance of airfoil fin printed circuit heat exchanger[J]. Journal of Chinese Society of Power Engineering, 2024, 44(6):837-843.
• [17] HAN Q, LAI W H, LIU Z X, et al. A comparative study of enhanced thermal performance in Tesla-type microchannels[J]. Applied Thermal Engineering, 2024,239:122157.
• [18] MAJMADER B F, HASAN J M. Heat transfer and fluid flow characteristics of a periodically constricted microchannel heat sink with supercritical carbon-di-oxide(sCO2)as a coolant near its critical point[J]. International Journal of Thermal Sciences, 2025, 210:109609.
• [19]朱兵国,何吉祥.变截面耦合通道PCHE内超临界CO2热工水力性能研究[J].工程热物理学报, 2024,45(6):1749-1756.ZHU Bingguo, HE Jixiang. Study on thermal and hydraulic performance of supercritical CO2 in coupled channel PCHE with variable cross-section[J]. Journal of Engineering Thermophysics, 2024, 45(6):1749-1756.
• [20] PONNORE J J, ALDAWI F. Enhanced printed-circuit heat exchanger for supercritical CO2 Brayton cycle pre-coolers with innovative convergent-divergent mini-channel design[J]. International Journal of Thermal Sciences,2025, 214:109857.
• [21]吴家荣,李红智,杨玉,等.类菱形肋片流道印刷电路板换热器热工水力特性研究[J].热力发电, 2023,52(11):20-28.WU Jiarong, LI Hongzhi, YANG Yu, et al. Study on the thermal hydraulic characteristics of the printed circuit heat exchanger with rhombic fin channels[J]. Thermal Power Generation, 2023, 52(11):20-28.
• [22]卢京龙.具有特斯拉阀通道结构的印刷电路板换热器流动与换热特性及参数优化[D].长沙:长沙理工大学, 2022:1.LU Jinglong. Flow and heat transfer characteristics and parameter optimization of a printed circuit board heat exchange with a tesla value channel structure[D].Changsha:Changsha University of Science&Technology, 2022:1.
• [23]沈佳飞,王波,周秋平,等.转折角对Z形通道印刷电路板式换热器中二氧化碳流动与换热特性的影响[J].上海理工大学学报, 2023, 45(4):352-363.SHEN Jiafei, WANG Bo, ZHOU Qiuping, et al. Effect of turning angle on flow and heat transfer characteristics of carbon dioxide in zigzag printed circuit heat exchanges[J].Journal of University of Shanghai for Science and Technology, 2023, 45(4):352-363.
• [24]曾豪. Z型PCHE内超临界二氧化碳流动传热数值研究[D].重庆:重庆大学, 2021:1.ZENG Hao. Numerical investigation on the flow and heat transfer characteristics of supercritical carbon dioxide in Zigzag-channel PCHE[D]. Chongqing:Chongqing University, 2021:1.
• [25]杨彦春,鹿院卫,吴玉庭,等.印刷电路板换热器内翅片布置方式的场协同分析与讨论[J].北京工业大学学报, 2024, 50(5):610-619.YANG Yanchun, LU Yuanwei WU Yuting, et al. Analysis and discussion of field synergy principle of fin arrangement in printed circuit heat exchange[J]. Journal of Beijing University of Technology, 2024, 50(5):610-619.
• [26] LIU K, ZHAO F, MING Y, et al. S-CO2 and LBE coupled heat transfer characteristics analysis in new layout PCHE[J]. Nuclear Engineering and Design, 2024, 424:113318.
• [27] REN Z, ZHAO C, JIANG P, et al. Investigation on local convection heat transfer of supercritical CO2 during cooling in horizontal semicircular channels of printed circuit heat exchanger[J]. Applied Thermal Engineering,2019, 157:113697.
• [28]吴新汶.超临界二氧化碳循环PCHE预冷器流动传热特性研究与设计优化[D].南京:东南大学, 2023:1.WU Xinwen. Supercritical carbon dioxide cycle PCHE pre-cooler[D]. Nanjing:Southeast University, 2023:1.
• [29] ZHOU Y L, YIN D D, GUO X T, et al. Numerical analysis of the thermal and hydraulic characteristics of CO2/propane mixtures in printed circuit heat exchangers[J].International Journal of Heat and Mass Transfer, 2022,185:122434.