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Space-based liquid hydrogen propellant storage system: subscale ground testing results.

Author(s) : LIGGETT M. W.

Type of article: Article

Summary

Improved retention using refrigeration, boil-off vapour-cooled shields (VCSs), multilayer superinsulation and para-ortho hydrogen conversion are the required state-of-the-art techniques. A two-stage gaseous helium refrigerator was integrated with the test article and used to reduce boil-off and/or decrease the time required between passive test configuration steady-state conditions. The VCSs were cooled with either liquid hydrogen boil-off gas or refrigerated gaseous helium. The design, assembly and results from 400 hours of thermal tests are presented along with a comparison of predicted and measured steady-state boil-off rates for 10 test configurations. Also presented are some of the unique issues and challenges encountered during these tests that are related to instrumentation and control.

Details

  • Original title: Space-based liquid hydrogen propellant storage system: subscale ground testing results.
  • Record ID : 1994-0058
  • Languages: English
  • Source: Cryogenics - vol. 33 - n. 4
  • Publication date: 1993/04

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