Computer Science – Performance
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987cfmt.conf..193l&link_type=abstract
In NASA. Lewis Research Center, Cleveland, Ohio. Cryogenic Fluid Management Technology Workshop. Volume 1: Presentation Material
Computer Science
Performance
Cosmic Background Explorer Satellite, Cryogenic Equipment, Cryogenic Fluids, Life (Durability), Space Infrared Telescope Facility, Spacecraft Design, Storage Tanks, Systems Engineering, Thermal Analysis, Comparison, Fluid Management, Helium, Liquid Hydrogen, Liquid Oxygen
Scientific paper
The design and performance characteristics of an observatory are compared with those of a storage dewar. The critical design technologies required to increase cryogen dewar lifetime are discussed. In particular, outer shell temperature, vapor cooled shields, multilayer insulation performance, and tank support systems are analyzed to assess their impact on cryogen lifetime for both the observatory and the storage dewar. The cryogen lifetime and cryogen mass loss rate of the Space Infrared Telescope Facility (SIRTF) are compared with that of the Infrared Astronomy Satellite and the Cosmic Background Explorer Satellite. A 0.1 percent mass loss per day of superfluid helium dewar can be designed using current state-of-the-art dewar technology. Space-based liquid hydrogen and liquid oxygen tanks can be designed for a 5-year lifetime.
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