Experimental investigation of the phase shifting buffer in the shared inertance tube pulse tube refrigerator
ZHANG Shurui, WANG Chenguang, 朱 紹偉 （同済大）
Abstract:The development of more reliable and efficient multi-stage Stirling-type pulse tube cryocoolers (SPTCs) is essential for space exploration missions. Shared inertance tube SPTCs have demonstrated promising efficiency at low temperature, benefiting from their phase redistribution function and superior phase-shifting capability for the low-temperature stage. In this study, preliminary experiments were conducted on a shared inertance tube SPTC to validate the effect of the phase-shifting buffer on redistributing the phase shifting capability between the two stages. Two identical linear compressors were used instead of a step piston compressor to drive the cold heads. The results demonstrate that the phase-shifting buffer has a significant impact on the cryocooler's performance and serves as an effective method for phase shifting.