Abstract
Two continuous operation 18 K/20 K sorption coolers are being developed by the Jet Propulsion Laboratory (JPL) as a NASA contribution to the European Space Agency (ESA) Planck mission that is currently planned for a 2007 launch. The individual sorption coolers will each be capable of providing a total of about 200 mW of cooling at 18 K and 1.4 Wat 20 K given passive radiative pre-cooling at 50 K. The hydrogen sorption coolers will directly cool the Low Frequency Instrument HEMT amplifiers to approximately 20 K and will also serve to intercept parasitics and pre-cool a RAL 4.5 K closed-cycle helium J-T cooler to 18 K for the separate High Frequency Instrument. To design the Planck sorption coolers a general sizing model and a detailed performance prediction model have been developed.
In this paper we describe the underlying relationships that determine the required size of a 18/20K hydrogen sorption cooler, and the approach utilized to model and optimize designs. In addition an initial comparison with the first data on a compressor element test will be presented while experimental data for the rest of the cooler components are not available and will be validated in the near future.
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References
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© 2002 Kluwer Academic Publishers
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Bhandari, P., Prina, M., Ahart, M., Bowman, R.C., Wade, L.A. (2002). Sizing and Dynamic Performance Prediction Tools for 20 K Hydrogen Sorption Cryocoolers. In: Ross, R.G. (eds) Cryocoolers 11. Springer, Boston, MA. https://doi.org/10.1007/0-306-47112-4_68
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DOI: https://doi.org/10.1007/0-306-47112-4_68
Publisher Name: Springer, Boston, MA
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