Experimental investigation of pulse tube refrigerator with displacer

This article has done the first experimental research on the pulse tube refrigerator with rod type displacer. The displacer with a rod is both used for a phase shifter to adjust the phase angle between the pressure wave and the mass flow, and used to recover the expansion work from the hot end of the pulse tube. How the charge pressure, the operational frequency and the input power affect the performance of the refrigerator is discussed in this article by experimental research. No-load temperature of 38.9K is reached in the preliminary experiment.