Two Thales LSF9589 commercial off-the-shelf (COTS) Stirling cryocoolers were parametrically performance tested for cold tip temperatures between 37 K and 250 K, heat rejection temperatures between 0°C and 40°C, and drive frequencies between 46Hz and 51Hz . The effect of compressor and expander temperature difference is also discussed. Both LSF9589 coolers had identical transfer line...
The Advanced Baseline Imager (ABI) Pulse Tube Cryocooler System is a two-stage pulse
tube cryocooler designed to service space applications requiring simultaneous cooling of two separate optical assemblies at different temperatures, ultra-high reliability, and long lifetime. The mechanical cryocooler is a two-stage variant of the Northrop Grumman HEC (High Efficiency Cryocooler), consisting...
Electrified aircraft are being developed to address climate change and pollution by reducing the fuel burn and emissions of aircraft. Achieving a substantial impact necessitates focusing on single- and twin-aisle aircraft, which currently dominate world-wide emissions and contain propulsion systems with about 20+ MW ratings. Multi-MW superconducting electric machines are being developed to...
Lockheed Martin is one of three teams funded by NASA’s Goddard Space Flight Center to build demonstration model cryocoolers for the European Space Agency’s Advanced Telescope for High-Energy Astrophysics (NewATHENA) X-ray space telescope mission. The NewATHENA X-ray instrument presents some design challenges, including the requirement to separate the 4.5 K cryogenic stage approximately one...
Large cryocoolers are needed for future In-Situ Resource Utilization (ISRU)-based production of cryogenic fuel material. This paper reports on the design and preliminary testing and simulation of a novel regenerator filler for Stirling and pulse-tube cryocoolers with 150W cooling power at 90K temperature. The regenerator is loaded with 3D printed 1 cm-thick ceramic disks that have flow...
Miniature coaxial pulse tube cryocoolers are widely used for cooling instruments in space science missions and military exploration fields due to their low vibration, long life, and high reliability and rapid cooling. In this study, a highly compact 0.91 kg miniature coaxial pulse tube cryocooler is developed. When the charging pressure is 4 MPa and 72 W of electrical power is inputted into...
With the increasing demand for miniaturized and high-performance pulse tube cryocoolers in space exploration, infrared remote sensing and other fields, how to improve the refrigeration quantity of pulse tube cryocoolers per unit volume has become the key to meet this demand. To improve the refrigeration quantity of a pulse tube cryocooler per unit volume, it is necessary to increase the energy...
