Boreas Cryogenics successfully developed a kW-class high-frequency pulse tube cryocooler. The related work was published in CRYOGENICS.
 

The cold end of the pulse tube cryocooler eliminates the moving component, achieving no-wear, extremely-low vibration and theoretically infinite life. The high-frequency pulse tube cryocooler driven by the long-life linear compressor achieves high reliability and long-life of the hot end, so it is regarded as the optimal choice for the new generation of space-borne cooling technology. 
 

However, for ground-based civil applications, particularly in superconducting power systems, its notable drawback is the difficulty in achieving very high cooling capacity.  
 

We overcame the challenges through great efforts and successfully developed a cryocooler with very high cooling capacity which can achieve 1 kW at 77 K. This is the milestone for the cryogenic systems development for superconducting power applications.

Fig. 1. A high-frequency pulse tube cryocooler with kW-class cooling capacity



Fig. 2. Arrangement of the SPTC with four PTCFs.