Thermodynamic aspects of small 4.2-K cryocoolers
Abstract
Advantages regarding a use of superconducting electronic devices are related to potential benefits in size, weight, accuracy, sensitivity, and reproducibility. For the employment of such devices, suitable cryogenic systems are needed. As closed cycle coolers have advantages with respect to potential size, weight, and longevity, an investigation has been performed for the evaluation of different closed cycle system options from a thermodynamic point of view. A survey of available technology is provided, and aspects of thermodynamic optimization are explored, taking into account the single engine Claude cycle, regenerative cycles with J-T loops, and a comparison of the total power requirements for the three cycles. A study is conducted of wet (two-phase) expanders, cold gas compressors, and ejectors to determine potential improvements to the J-T sections of the various cycles.
- Publication:
-
Advances in Cryogenic Engineering, Volume 27
- Pub Date:
- 1982
- Bibcode:
- 1982ACGE...27..596P
- Keywords:
-
- Cryogenic Cooling;
- Electronic Equipment;
- Power Efficiency;
- Thermodynamic Cycles;
- Compressors;
- Ejectors;
- Engines;
- Optimization;
- Stirling Cycle;
- Engineering (General)