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Method for Detecting Perlite Compaction in Large Cryogenic TanksPerlite is the most typical insulating powder used to separate the inner and outer shells of cryogenic tanks. The inner tank holds the low-temperature commodity, while the outer shell is exposed to the ambient temperature. Perlite minimizes radiative energy transfer between the two tanks. Being a powder, perlite will settle over time, leading to the danger of transferring any loads from the inner shell to the outer shell. This can cause deformation of the outer shell, leading to damaged internal fittings. The method proposed is to place strain or displacement sensors on several locations of the outer shell. Loads induced on the shell by the expanding inner shell and perlite would be monitored, providing an indication of the location and degree of compaction.
Document ID
Document Type
Other - NASA Tech Brief
Youngquist, Robert
(NASA Kennedy Space Center Cocoa Beach, FL, United States)
Date Acquired
August 24, 2013
Publication Date
April 1, 2010
Publication Information
Publication: NASA Tech Briefs, April 2010
Subject Category
Structural Mechanics
Report/Patent Number
Distribution Limits
Public Use Permitted.
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