摘要
回热器作为回热式低温制冷机的关键部件,其填充介质对整体性能影响很大。采用丙纶纤维作为回热器新型填充介质,对单级脉管制冷机进行了试验研究。对丙纶微尺度空间结构及物理性能进行了分析,基于充气压力分别为3.5 MPa/3.0 MPa/2.8 MPa/2.5 MPa/2.0 MPa/1.5 MPa的工况下,进行了降温性能、频率性能、制冷性能试验,获取了最低制冷温度,最佳工作频率及最大比卡诺效率。研究结果表明,充气压力对丙纶填充回热器的制冷机整体性能影响较大,工作频率的影响不是很明显。最终获得了最大比卡诺效率9.46%@170 K/10.06 W/77 W,最大制冷量为5.47 W@120 K/2.5 MPa、12.02 W@150 K/3.0 MPa、16.49 W@170 K/3.0 MPa,并获得了96.4 K的最低制冷温度。
As the key component of regenerative cryocooler, regenerator and its filled material has great influence on thermal performance of the whole machine. Fine fibrous Polyester was selected as new material filled for regenerator, and experimental research was taken on a single-stage pulse tube cryocooler. The microstructure and physical parameters of the fibrous material were taken. Based on helium-3 charging pressures respectively of 3.SMPa /3.0MPa /2.SMPa /2.SMPa /2.0MPa /1.5MPa, the thermal performances of temperature dropping, working frequency and cooling are collected. The lowest refrigeration temperature, the optimum working frequency, maximum cooling capacity and the maximum percent of Carnot efficiency are obtained and analyzed. The charging air pressure had a profound effect on the thermal performance of the pulse tube cryocooler while the operating frequency played a slightly effect on it. The maximum percent of Carnot efficiency 9.46%@170 K/10.06 W/77 W, the maximum cooling capacity 5.47 W@120 K/2.5 MPa, 12.02 W@150 K/3.0 MPa, 16.49 W@170 FU3.0 MPa, and the lowest refrigeration temperature 96.4 K are obtained in the experiment.
作者
阚安康
吴亦农
张安阔
刘少帅
KAN Ankang WU YinongI ZHANG Ankuo LIU Shaoshuai(Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai 200083, China Merchant Marine College, Shanghai Maritime University, Shanghai 201306, China)
出处
《红外技术》
CSCD
北大核心
2017年第4期372-377,共6页
Infrared Technology
基金
中国博士后科学基金项目(2016M590385)
上海市自然基金资助项目(15ZR1419900)
关键词
脉管制冷机
回热器
丙纶纤维
制冷性能
pulse tube cryocooler, regenerator, Polyester fiber, cooling capacity
