Experimental investigation of a u-shape pulse tube cryocooler with one regenerator and two pulse tubes
In this paper, two normal U-shape pulse tube cryocoolers named U-PTC1 and U-PTC2, with different connecting tube locations, have been described. Based on the U-PTC1 and U-PTC2, two U-shape pulse tube cryocooler prototypes with two pulse tubes named U-DPTC1 and U-DPTC2 have been designed and manufactured. The prototype U-DPTC1 was able to gain 120K@6W cooling power with 80W electric power. This experiment demonstrated the feasibility of individual phase-shifting and DC flow could occur under general phase-shifting, reducing the performance of the cryocooler.