Performance of a single-stage mixed refrigerant miniature Joule Thomson cryocooler operating at 90-100 K for space applications

Abstract

The performance of a closed-cycle miniature Joule Thomson (J-T) cryocooler operating with zeotropic mixtures is presented in this work. The system can provide refrigeration between 90-100 K and meet a heat load of 1 to 3 W. A miniature variable-speed rotary piston compressor is used in the present version. A coiled tubes-in-tube heat exchanger with an effectiveness greater than 95% is used. The details of the system and its performance are presented in this paper.