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Record Details

Record 38 of 46878
Transient response of a high-capacity heat pipe for Space Station Freedom
Author and Affiliation:
Ambrose, J. H.(Lockheed Missiles and Space Co., Sunnyvale, CA, United States)
Holmes, H. R.(Lockheed Missiles and Space Co., Sunnyvale, CA, United States)
Abstract: High-capacity heat pipe radiator panels have been proposed as the primary means of heat rejection for Space Station Freedom. In this system, the heat pipe would interface with the thermal bus condensers. Changes in system heat load can produce large temperature and heat load variations in individual heat pipes. Heat pipes could be required to start from an initially cold state, with heat loads temporarily exceeding their low-temperature transport capacity. The present research was motivated by the need for accurate prediction of such transient operating conditions. In this work, the cold startup of a 6.7-meter long high-capacity heat pipe is investigated experimentally and analytically. A transient thermohydraulic model of the heat pipe was developed which allows simulation of partially-primed operation. The results of cold startup tests using both constant temperature and constant heat flux evaporator boundary conditions are shown to be in good agreement with predicted transient response.
Publication Date: Jun 01, 1991
Document ID:
19910058842
(Acquired Nov 28, 1995)
Accession Number: 91A43465
Subject Category: FLUID MECHANICS AND HEAT TRANSFER
Report/Patent Number: AIAA PAPER 91-1403
Document Type: Preprint
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: Lockheed Missiles and Space Co.; Sunnyvale, CA, United States
Description: 7p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: HEAT PIPES; HEAT RADIATORS; SPACE STATION FREEDOM; SPACE STATION STRUCTURES; TRANSIENT RESPONSE; ACTIVE CONTROL; BOUNDARY CONDITIONS; TEMPERATURE CONTROL; THERMAL STRESSES
Imprint And Other Notes: AIAA, Thermophysics Conference, 26th, Honolulu, HI, June 24-26, 1991. 7 p. NASA-supported research.
Availability Source: Other Sources
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