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Magnesium fluoride as energy storage medium for spacecraft solar thermal power systemsMgF2 was investigated as a phase-change energy-storage material for LEO power systems using solar heat to run thermal cycles. It provides a high heat of fusion per unit mass at a high melting point (1536 K). Theoretical evaluation showed the basic chemical compatibility of liquid MgF2 with refractory metals at 1600 K, though transient high pressures of H2 can occur in a closed container due to reaction with residual moisture. The compatibility was tested in two refractory metal containers for over 2000 h. Some showed no deterioration, while there was evidence that the fluoride reacted with hafnium in others. Corollary tests showed that the MgF2 supercooled by 10-30 K and 50-90 K.
Document ID
19920067650
Document Type
Reprint (Version printed in journal)
Authors
Lurio, Charles A. (Aerodyne Research, Inc. Billerica, MA, United States)
Date Acquired
August 15, 2013
Publication Date
October 1, 1992
Publication Information
Publication: Journal of Propulsion and Power
Volume: 8
Issue: 5, Se
ISSN: 0748-4658
Subject Category
SPACECRAFT PROPULSION AND POWER
Distribution Limits
Public
Copyright
Other