1988-07-01

Design of a Two-Phase Capillary Pumped Flight Experiment 881086

Two-phase flow technology has the potential to significantly improve spacecraft heat acquisition, transport, and control. Using the latent heat of fluids, ammonia in particular, orders of magnitude more heat can be transferred than is possible using the sensible heat of single-phase fluids. During the past several years, two-phase heat transport systems, in which surface-tension forces established in a fine-pore capillary wick circulate the working fluid, have demonstrated performance potentials compatible with future Space Station and advanced space-based program requirements. This paper presents details of the design, analysis, fabrication, and test plan of a CPL flight experiment program. Results of this program will be important in the overall qualification of this technology for use on such advanced programs as Space Station and beyond.

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