Design and test of a 80 K miniature pulse tube cryocooler

摘要

A 80 K miniature pulse tube cryocooler has been designed, fabricated and tested. The pulse tube cryocooler is designed to provide 0.5 W of cooling power at 80 K with input electrical power less than 40 W. The cryocooler system incorporates a compressor with U-shaped pulse tube configuration. A computer simulation program based on the theory of thermodynamic non-symmetry is developed for performance predictions, optimizations, and as a guide for system design. Dimensions of the pulse tube and the regenerator are optimized further by experimental methods. The double inlet valve and the inertance tube are both used for phase shifting. The lowest temperature of 59.3 K is achieved.