Analysis of a High-Frequency Stirling Cycle Compressor for Cryogenic Cooling in Space

摘要

The dynamics of a compressor piston with a nonlinear gas spring (provided by the gas compression force) operating in a self resonant mode were analyzed to permit computer simulation. The intent was to increase the operating frequency to 270 Hz and to design a dynamically balanced compressor. These changes, which would allow greater specific power and eliminate a separate balancing device, are highly advantageous for cryogenic cooling in space. A short stroke large area piston allows a drive system to use electromagnetically coupled pistons with stationary excitation coils. This configuration and some test results are included. The performance of the drive system was studied analytically and computationally for operation under resonance conditions necessary for high efficiency. An acoustically tuned displacer is assumed. The analysis and computer model that was developed should allow optimization and miniaturization.