新型热驱动斯特林冷电联产系统数值模拟研究  

Numerical Study on a Novel Heat-driven Stirling-based Combined Cooling and Power System

作　　者：孙浩杰 余国瑶[1] 朱顺敏 戴巍[1,2] 罗二仓 SUN Haojie;YU Guoyao;ZHU Shunmin;DAI Wei;LUO Ercang(The key laboratory of cryogenics,Technical Institute of Physics and Chemistry,Beijing 100190;University of Chinese Academy of Sciences,Beijing 100049)

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

出　　处：《工程热物理学报》2022年第7期1783-1789,共7页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.51876214)。

摘　　要：为解决现有热驱动斯特林冷电联产系统存在的系统性能对直线电机参数敏感性高、匹配难度大的问题,创新性地提出一种热驱动斯特林冷电联产装置,即采用声学谐振管和旁接直线电机实现自由活塞斯特林发动机和自由活塞斯特林制冷机之间的阻抗匹配、声功分配和传递。基于热声理论和商业计算软件Sage对系统进行理论分析和数值模拟,考察了发动机加热温度、制冷机制冷温度和平均压力等对系统性能的影响规律。计算结果表明:在平均压力5 MPa,加热温度833 K时,该热驱动斯特林冷电联产系统在制冷温度110 K下,能获得1000 W制冷量和800W电功,整机效率达29.4%。发动机、制冷机和直线电机能实现较好的功率匹配,电机输出电功的变化对系统热效率影响较小。In conventional heat-driven Stirling-based combined cooling and power(CCP) systems,the system performance is highly sensitive to linear alternator parameters.Besides,an efficient coupling between the engine and the cooler is difficult to achieve.To address these issues,a novel heatdriven Stirling-based CCP system is proposed in this work.The proposed system uses a resonance tube and a linear alternator to realize an efficient impedance matching,acoustic power distribution,and transmission among a free-piston Stirling engine and a free-piston Stirling cooler.Based on the thermoacoustic theory and commercial software Sage,the proposed system is numerically investigated.The results show that when the heating temperature is 833 K and the charged pressure of helium gas is 5 MPa,the proposed system can provide a cooling capacity of 1000 W at 110 K and an electric power of 800 W with a global exergy efficiency of 29.4%.The engine,the cooler,and the linear alternator can realize an efficient power matching.Besides,the change of the linear alternator’s electrical power output has little effect on the system efficiency.

关 键 词：热驱动 斯特林 冷电联产 谐振管 

分 类 号：TK123[动力工程及工程热物理—工程热物理]