空间预冷型J-T节流制冷机热力学流程优化研究  

Thermodynamic Process Optimization Research of a Space Hybrid J-T Cryocooler

作　　者：马跃学 王娟[1] 刘彦杰[1] 梁惊涛[1] 

机构地区：[1]中国科学院理化技术研究所空间功热转换技术重点实验室,北京100190 [2]中国科学院大学,北京100049

出　　处：《工程热物理学报》2016年第11期2282-2287,共6页Journal of Engineering Thermophysics

基　　金：航空科学基金资助项目(No.20132446001)

摘　　要：预冷型J-T节流制冷机是深空探测普遍采用的制冷机,本文针对本实验室研制的三级脉冲管预冷J-T节流循环的复合式制冷机,对液氦温区J-T节流制冷机进行了系统的热力学分析。通过对理想节流循环的T—s图的分析发现,预冷温度和节流前氦气状态参数是影响节流制冷机性能的关键因素。通过合理选择预冷温度和节流前氦气的温度和压力,可以提高节流循环的制冷量和整机效率。在理论分析基础上,开展了相关的实验研究,实验结果验证了理论分析的正确性。Hybrid J-T cryocooler is widely used in deep space exploration. In this study, thermodynamic analysis of J-T cycle is carried out based on the J-T cryocooler precooled by a three-stage pulse tube cooler developed by our laboratory. According to the analysis of ideal J-T cycle T - s diagram, precooling temperature and helium state parameters before throttling are the critical factors that influence the performance of the hybrid J-T cooler. Cooling capacity of the J-T cooler increases as temperature before throttling reduces and efficiency of the J-T cooler will be improved by increasing charge pressure and precooling temperature. Then, experimental research is conducted to verify the theoretical analysis.

关 键 词：空间 J-T节流制冷机 热力学分析 优化 

分 类 号：TB65[一般工业技术—制冷工程]