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Determination of optimum fin profile for a zero-G capillary drained condenserThis paper presents the analytical formulation and numerical results for heat transfer in a high heat flux condenser that relies on capillary flow along shaped fins (Gregorig surfaces) and a drainage network embedded in the condenser walls. Results are shown for a variety of fin profile shapes in order to show the geometric trade-offs involved in seeking a maximum effective heat transfer coefficient for the fin. Predictions of the model show excellent agreement with previously reported measurements for steam. Based on this work, a profile has been selected for a 2 kW ammonia condenser currently under development for use in space. In that design the fin half width is 0.5 mm and the model predicts a heat transfer coefficient referred to the base of the fin of 9 W/sq cm deg C for a heat flux of 10/W sq cm at the base.
Document ID
Document Type
Conference Paper
Mccormick, John A.
(Creare, Inc. Hanover, NH, United States)
Valenzuela, Javier A.
(Creare, Inc. Hanover, NH, United States)
Choudhury, Dipanker
(Creare, Inc. Hanover, NH, United States)
Date Acquired
August 14, 2013
Publication Date
June 1, 1990
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
AIAA PAPER 90-1686
Accession Number
Funding Number(s)
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