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Heat transfer characteristics of a reservoir embedded loop heat pipe (2nd report, Influence of noncondensable gas on heat transfer characteristics)

✍ Scribed by Hiroaki Ishikawa; Tetsuro Ogushi; Takehide Nomura; Hiroyuki Noda; Haruo Kawasaki; Takahiro Yabe

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
786 KB
Volume
36
Category
Article
ISSN
1099-2871

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✦ Synopsis

Abstract

High‐powered satellites need larger heat rejection areas. A deployable radiator is one of the key technologies for a high‐powered satellite bus. A Reservoir Embedded Loop Heat Pipe (RELHP) is a two‐phase heat transfer device that constitutes the deployable radiator. RELHP has an evaporator core which is used as a liquid reservoir to enhance operational reliability. For use on satellites, RELHP is required to have a lifetime greater than 10 years. In the case of conventional heat pipes, it is generally known that noncondensable gas (NCG) has worse heat transport characteristics. On the other hand, the influence of NCG on a RELHP is not still obvious. This paper presents the heat transport characteristics of RELHP for the case of changing NCG volume by experiment and calculation. It was found that NCG increases temperature rise at the evaporator. NCG volume in a RELHP has a great influence on heat transport characteristics due to the reservoir pressure increase caused by NCG. © 2007 Wiley Periodicals, Inc. Heat Trans Asian Res, 36(8): 459–473, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/htj.20181

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