低频热驱动气–液耦合热声制冷系统数值模拟研究  

Study on a Low-Frquency Gas-Liquid-Coupled Heat-Driven Thermoacoustic Refrigerator

作　　者：迟佳欣 胡易伟 徐静远 吴张华[1] 张丽敏[1] 罗二仓[1,2] CHI Jiaxin;HU Yiwei;XU Jingyuan;WU Zhanghua;ZhANG Limin;LUO Ercang(CAS Key Laboratory of Cryogenic,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy Sciences,Beijing 100049,China;Department of Chemical Engineering,Imperial College London,London SW72AZ,UK)

机构地区：[1]中国科学院理化技术研究所低温工程学重点实验室,北京100190 [2]中国科学院大学,北京100049 [3]帝国理工学院化学工程系,伦敦SW72AZ

出　　处：《工程热物理学报》2023年第12期3205-3212,共8页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51906250)。

摘　　要：提出了一种低频热驱动气–液耦合热声制冷系统,通过数值模拟优化了该系统的结构参数并对其热力性能进行了数值模拟分析。首先,分别对系统关键参数的沿程分布和各部件的[火用]损失进行了分析;然后,探究了不同压力下液体质量对系统热力学参数的影响;最后,与传统热声制冷系统进行了对比。结果表明,气液耦合热声制冷系统可以有效地提升系统的压比、制冷量、COP和相对卡诺效率,降低系统的起振温度和频率。在加热温度300℃,制冷温度15℃,环境温度50℃,平均压力10 MPa时,气液耦合热声制冷系统制冷量为31.12 kW,是传统热声系统理论值的4倍,COP和相对卡诺效率相对于传统热声制冷系统的理论值分别提升了13%和25.9%。In this paper,a low-frequency gas-liquid-coupled heat-driven thermoacoustic refrigerator is proposed.The structural parameters of the system are optimized through numerical simulation and the thermal performance is analyzed.First of all,the distribution of the key parameters of the system and the exergy loss of each component are analyzed respectively;then,the influence of the liquid mass under different mean pressures on the thermodynamic parameters of the system is explored;finally,a comparison is made with the traditional thermoacoustic refrigeration system.The results show that the gas-liquid-coupled thermoacoustic refrigerator can effectively improve the pressure ratio,cooling power,COP and relative Carnot efficiency of the system,and reduce the frequency and onset temperature of the system.When the heating temperature is 300℃,the cooling temperature is 15℃,the ambient temperature is 50℃,and the mean pressure is 10 MPa,the cooling power of the gas-liquid coupled thermoacoustic refrigerator is 31.12 kW,which is 4 times the theoretical value of the traditional thermoacoustic system.Compared with the theoretical values of traditional thermoacoustic refrigeration systems,the COP and relative Carnot efficiency of the gas-liquid coupled thermoacoustic refrigerator have increased by 13%and 25.9%,respectively.

关 键 词：热声 热声制冷 气液耦合 热驱动 

分 类 号：TK123[动力工程及工程热物理—工程热物理]