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Advantages of Cryopumping With Liquid Hydrogen Instead of Helium RefrigeratorsOpen loop hydrogen vaporizers and helium refrigerators are compared for operational complexity, installation and operating cost, and safety requirements. Data from two vacuum chambers using helium refrigerators are used to provide comparative data. In general, the use of hydrogen is attractive in the larger systems, even when extra safety precautions are taken. Emotional resistance to the use of hydrogen because of safety requirements is considered great. However, the experience gained in the handling of large quantities of cryogenics, particularly hydrogen and liquefied natural gases, should be considered in the design of open loop hydrogen cooling systems.
Document ID
19720014635
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
J.W. Anderson
(Lockheed Missiles and Space Co. Sunnyvale, CA, United States)
J. E. Tueller
(Lockheed Missiles and Space Co. Sunnyvale, CA, United States)
Date Acquired
August 6, 2013
Publication Date
January 1, 1972
Publication Information
Publication: NASA. Goddard Space Flight Center Space Simulation
Subject Category
Physics, General
Accession Number
72N22285
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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