NDLI: Cryogenic Mass Gauging in a Free-Falling Storage Tank

Content Provider	Springer Nature Link
Author	Ihas, G. G. Mitin, V. F. Sullivan, N. S.
Copyright Year	2004
Abstract	The most efficient shuttle would be an all-cryogenic propellant vehicle. One problem with on-board cryogenic storage is mass gauging. Even though, in principle, one can determine the amount of cryogen in a tank by its history of use, this is not practical. In free-fall, the exact configuration of the liquid and vapor in the tank is not known. Depending on the recent motion of the craft, the liquid could be in small, dispersed drops, a single glob, or some combination of these configurations. The configuration is known only when the vehicle is under significant acceleration, when a standard level meter may be used to detect the single liquid/vapor meniscus. Currently, the shuttle must be accelerated for 15 sec to make an accurate measurement of propellant volume remaining. We have considered various methods for determining the mass of liquid directly, and have pursued a technique that takes advantage of the large difference in specific heat capacity of liquid and gaseous hydrogen, both of which are nearly independent of the vehicle's motion and position with respect to any gravitational field. Small thermometers and heaters have been utilized that are rapidly responding and possess the necessary sensitivity to make a measurement in a 2,500 liter tank. System design criteria, with sensor construction, are discussed. Data on sensor sensitivity is presented.
Starting Page	437
Ending Page	442
Page Count	6
File Format	PDF
ISSN	00222291
Journal	Journal of Low Temperature Physics
Volume Number	134
Issue Number	1-2
e-ISSN	15737357
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2004-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Characterization and Evaluation Materials Condensed Matter Magnetism, Magnetic Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Materials Science

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