NDLI: Heat rejection from a variable conductance heat pipe radiator panel

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Heat rejection from a variable conductance heat pipe radiator panel

Content Provider	NASA Technical Reports Server (NTRS)
Author	Hervol, D. S. Jaworske, D. A. Gibson, M. A.
Copyright Year	2012
Description	A titanium-water heat pipe radiator having an innovative proprietary evaporator configuration was evaluated in a large vacuum chamber equipped with liquid nitrogen cooled cold walls. The radiator was manufactured by Advanced Cooling Technologies, Inc. (ACT), Lancaster, PA, and delivered as part of a Small Business Innovative Research effort. The radiator panel consisted of five titanium-water heat pipes operating as thermosyphons, sandwiched between two polymer matrix composite face sheets. The five variable conductance heat pipes were purposely charged with a small amount of non-condensable gas to control heat flow through the condenser. Heat rejection was evaluated over a wide range of inlet water temperature and flow conditions, and heat rejection was calculated in real-time utilizing a data acquisition system programmed with the Stefan-Boltzmann equation. Thermography through an infra-red transparent window identified heat flow across the panel. Under nominal operation, a maximum heat rejection value of over 2200 Watts was identified. The thermal vacuum evaluation of heat rejection provided critical information on understanding the radiator s performance, and in steady state and transient scenarios provided useful information for validating current thermal models in support of the Fission Power Systems Project.
File Size	104564
Page Count	2
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20120004033
Archival Resource Key	ark:/13960/t3vt6n798
Language	English
Publisher Date	2012-03-21
Access Restriction	Open
Subject Keyword	Energy Production And Conversion Temperature Distribution Conductive Heat Transfer Cooling Vacuum Chambers Heat Pipes Liquid Nitrogen Noncondensable Gases Titanium Cold Surfaces Steady State Transparence Thermography Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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