Other
Scientific paper
Jan 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aipc..608..929z&link_type=abstract
SPACE TECHNOLOGY AND APPLICATIONS INTERNATIONAL FORUM- STAIF 2002. Conference on Thermophyiscs in Microgravity; Conference on In
Other
1
Cryogenics, Refrigerators, Low-Temperature Detectors, And Other Low-Temperature Equipment, Spaceborne And Space Research Instruments, Apparatus, And Components
Scientific paper
Preliminary design studies show that a low-power, turbomachine-based, Brayton-cycle power unit is an extremely attractive option for thermal-to-electric power conversion on long-duration, deep-space missions. A 100 We power unit promises to achieve a thermal efficiency of 38% and weigh only 2.4 kg while requiring a single general-purpose heat source. The design of this unit is based on miniature, high-performance components that have been developed by Creare Inc. for space-borne, Brayton-cycle refrigerators. The components include high-speed, high-efficiency rotors and alternators: high-speed, precision gas bearings, and high-performance, compact recuperators. Miniaturization and performance goals for these components have been achieved through unique microscale fabrication techniques that have enabled high precision in miniature components. The resulting refrigerators are lightweight, highly efficient, vibration-free, highly reliable, and have long, maintenance-free life (greater than 5 years). These refrigerators and their components have been demonstrated to meet rigorous requirements for vibration emittance and susceptibility, acoustic susceptibility, electromagnetic interference and susceptibility, environmental cycling and endurance. A Creare Brayton-cycle refrigerator has been successfully space flight qualified and tested. The application of the underlying turbo-Brayton technologies to thermal-to-electric power conversion is the subject of this paper. .
Izenson Michael G.
McCormick John A.
Swift Walter L.
Zagarola Mark V.
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