A mixed refrigerant cycle for providing refrigeration below 70 k for superconducting applications

There is worldwide interest in the development of mixed refrigerant cycle refrigerators and liquefiers. Most studies till date have been at temperatures greater than 70 K. However, there is a need for refrigerators working below 70 K for use in superconducting transformers, motors, generators and cables. In this paper we present a new process for a mixed refrigerant cycle refrigerator for use in superconducting applications.