6W@60K脉管制冷机的优化及实验研究

Simulation and Experimental Study of a 6W@60K PTR

设计制作了一台6W@60K同轴型脉管制冷机,用于冷却一碲镉汞红外探测器。通过脉管制冷机结构特点的分析及系统阻抗特性的研究,给出压缩机内部气体阻抗实虚部与PV功转换效率之间的变化规律,从而为设计出高效的脉管制冷机提供有益指导。完成了该脉管制冷机的设计、制作及性能测试工作。实验表明该制冷机在150 W电功输入下可获得低于40 K最低温度,195 W电功输入下60 K可获得6 W制冷量,比卡诺效率为12%。

A 60 K coaxial pulse tube refrigerator(PTR) has been designed for cooling an infrared detector.The PTR's structure and its system impedance are prevented and analyzed respectively.The relationships are discussed between compressor PV power conversion efficiency and its internal gas impedance real and imaginary parts,which is useful for designing PTRs.The PTR has been designed,manufactured and tested.The experimental results show that the PTR is capable of cooling down to 40 K with 150 W electric input power and it can offer 6 W cooling capacity at 60 K cold temperature with 195 W electrical input power,which relative Carnot efficiency is 12%.