自由活塞斯特林发电机管壳式冷却器参数分析与实验研究  

Parametric and Experimental Study on the Shell and Tube Cooler of Free Piston Stirling Generators

作　　者：罗新奎 陈鹏帆 李生华[1] 安锦涛 闫春杰[1] 刘迎文[2] 王小军[1] LUO Xinkui;CHEN Pengfan;LI Shenghua;AN Jintao;YAN Chunjie;LIU Yingwen;WANG Xiaojun(Science and Technology on Vacuum Technology and Physics Laboratory,Lanzhou Institute of Physics,Lanzhou 730000,China;School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]兰州空间技术物理研究所真空技术与物理重点实验室,兰州730000 [2]西安交通大学能源与动力工程学院,西安710049

出　　处：《西安交通大学学报》2023年第11期91-99,共9页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(52276019)。

摘　　要：为满足某大功率自由活塞斯特林发电机(FPSG)冷端散热需求,设计了由995根换热管构成的管壳式冷却器。构建了FPSG热-动力学耦合模型,基于根轨迹分析方法确定了使系统实现起振的冷却器结构参数范围,并探究了冷却温度及冷却器无益容积对系统运行频率、活塞相位角和PV功的影响;基于Sage平台构建了FPSG热力学仿真模型,优化了冷却器结构参数,对冷却器的换热性能进行了实验研究。研究结果表明:当冷却温度和冷却器无益容积增大时,运行频率逐渐减小,活塞相位角逐渐增大;PV功随冷却温度的升高而减小,随冷却器无益容积的增大而先增大后减小;冷却温度的最佳取值范围为275~305 K,冷却器无益容积的最优值为250 cm 3;换热管最佳长度与内径分别为80 mm与2 mm;冷却器的最大散热功率为21.11 kW。该研究结果可为自由活塞斯特林发电机管壳式冷却器的优化设计提供参考。To meet the heat dissipation need at the cold end of a high power free piston Stirling generator(FPSG),a shell and tube cooler composed of 995 heat exchangers is designed.A thermodynamic-dynamic coupled model of FPSG is proposed.The range of structural parameters of the cooler is determined based on the root locus method.The influence of cooling temperature and dead volume of the cooler on operating frequency,phase angle and PV work of the system are explored.A thermodynamic simulation model of FPSG is established based on the Sage platform.The optimization of the structural parameters of the cooler is carried out.The heat transfer performance of the cooler is investigated experimentally.The results show that increasing the cooling temperature and dead volume of the cooler leads to a gradual decrease in the operating frequency and a gradual increase in the phase angle.The PV power decreases with increasing cooling temperature,while it increases first and then decreases with increasing dead volume of the cooler.The optimal cooling temperature ranges from 275 K to 305 K and the optimal dead volume of the cooler is 250 cm 3.The optimal length and inner diameter of the heat exchange tube are 80 mm and 2 mm respectively.The maximum heat dissipation power of the cooler is 21.11 kW.This research provides a reference for the optimal design of the shell and tube cooler of FPSGs.

关 键 词：自由活塞斯特林发电机 热-动力学 管壳式冷却器 换热性能 

分 类 号：TK124[动力工程及工程热物理—工程热物理]