Magazine Article

Wider-Opening Dewar Flasks for Cryogenic Storage

TBMG-6568

01/01/2010

Abstract
Content

Dewar flasks have been proposed as containers for relatively long-term (25 days) storage of perishable scientific samples or other perishable objects at a temperature of –175 °C. The refrigeration would be maintained through slow boiling of liquid nitrogen (LN2). For the purposes of the application for which these containers were proposed, (1) the neck openings of commercial off-the-shelf (COTS) Dewar flasks are too small for most NASA samples; (2) the round shapes of the COTS containers give rise to unacceptably low efficiency of packing in rectangular cargo compartments; and (3) the COTS containers include metal structures that are too thermally conductive, such that they cannot, without exceeding size and weight limits, hold enough LN2 for the required long-term-storage.

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Citation
"Wider-Opening Dewar Flasks for Cryogenic Storage," Mobility Engineering, January 1, 2010.
Additional Details
Publisher
Published
Jan 1, 2010
Product Code
TBMG-6568
Content Type
Magazine Article
Language
English