Multistage displacer type pulse tube refrigerator with large cooling power
An experimental study of a two-stage pulse tube refrigerator was carried out by u-sing step piston and inertance tube as phase shifters,which can combine the advantages of two phase shifters to improve the performance of refrigerator with a non-optimal matching displacer.A no-load temperature of 86.4 K/22.9 K is achieved under charging pressure of 2 MPa and operat-ing frequency of 51 Hz and using hybrid phase shifters.It can provide 5 W cooling power at 34.7 K with 1 25 1 W electric input power.It provides a reference for the performance optimization of the two-stage pulse tube refrigerator with hybrid phase shifters.
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