Design and experimental study of 6 W@80 K space coaxial vascular tube cryocooler
According to the requirement of infrared load in a certain space mission,a model of coaxial pulse tube refrigerator was built based on the Sage platform,and the structural parameters of the cold head were designed and calculated based on the simulation results.The effects of fill-ing method of regenerator,inertance tube combination,inflation pressure,input electrical power,and cold head direction on the performance of the refrigerator was explored using experimental methods.Comparing the experimental results with the simulation results,there is a high degree of agreement between the simulation and experiment result.The successfully developed coaxial pulse tube refrigerator for space use is at an advanced level among similar refrigerators,and its perform-ance parameters are as follows:the total mass is 3.5 kg,the input power is 150 W,the no-load re-frigeration temperature is 39.74 K,and the cooling capacity is 7.23 W@80 K.The relative effi-ciency of the pulse tube refrigerator to Carnot is 13.26％.
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