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TESTING OF ADVANCFD CERAMIC FABRIC WICK STRl JCTIJRES
AND THEIR USE IN A WATER HEAT PIPE
Zenen I. Antoniak, Brent J. Webb, James M. Bates, Matthew F. Cooper, and Keith A. Pauley
Energy Sciences Department
Pacific Northwest Laboratory
Richland, WA 99352
(509)375-3841
ABSTRACT
A prototype ceramic fabric/titanium water heat pipe has been constructed and tested; it
transported up to 60 W of power at about 390 K. Startup and operation both with and against
gravity were examined. Wick testing was begun to aid in the design and construction of an
improved prototype heat pipe, with a 38-^m stainless steel liner covered by a biaxially-
braided Nextel (trademark of the 3M Co., St. Paul, Minnesota) sleeve that is approximately 300-
|im thick. Wick testing took place in 1-g; limited testing in 0-g was initiated, and results to-
date suggest that in 0-g, wick performance improves over that in 1-g.
INTRODUCTION
Both Air Force and NASA future spacecraft thermal management needs span the temperature
range from cryogenics to liquid metals. Many of these needs are changing and not well defined
and will remain so until goals, technology, and missions converge. Nevertheless, it is certain
that high-temperature (> 800 K) and medium-temperature (about 450 K) radiator systems
will have to be developed that offer significant improvements over current designs. This paper
discusses experiments performed in the lower temperature regime as part of a comprehensive
advanced ceramic fabric (ACF) heat pipe development program. These experiments
encompassed wicking tests with various ceramic fabric samples, and heat transfer tests with a
1-m long prototype ACF water heat pipe.
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Antoniak, Z. I.; Webb, B. J.; Bates, J. M.; Cooper, M. F. & Pauley, K. A. 0-G experiments with advanced ceramic fabric wick structures, article, July 1991; Richland, Washington. (https://digital.library.unt.edu/ark:/67531/metadc1089599/m1/4/: accessed June 8, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.