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Working Fluid Trade Study for a Two-Phase Mechanically Pumped Loop Thermal Control System

Show simple item record Cappucci, Stefano Furst, Ben Sunada, Eric Bhandari, Pradeep Daimaru, Takuro 2020-05-05T21:11:34Z 2020-05-05T21:11:34Z 2018-07-08
dc.identifier.citation 48th International Conference on Environmental Systems (ICES), Albuquerque, New Mexico, July 8 - July 12, 2018 en_US
dc.identifier.clearanceno 18-2247
dc.description.abstract NASA Jet Propulsion Laboratory is investigating a two-phase mechanically pumped fluid loop (MPFL) technology for spacecraft thermal control for future planetary space science mission concepts. The two-phase technology combines the potential of single-phase MPFL and the passive two-phase heat pipe systems. Previous two-phase MPFL studies4,5 at JPL have identified an evaporator system with a separated flow architecture as providing a robust light mass thermal control system with very high spatial and temporal thermal stability required by the science instruments on these missions. These studies have further identified the thermophysical properties of the working fluid to be key to the performance of a two-phase fluid loop. This paper describes the methodology used in the selection of the working fluids for optimizing the performance of the two-phase MPFL. A high level model was developed that includes the constraints and boundaries driven by the system components. The performance of fluids from the REFPROP database were investigated and rated for this system. The working fluid attributes such as cost, hazardous properties, and heritage were taken into account in this selection. A typical spacecraft dissipating 1000 W and a fluid loop consisting of an evaporator, accumulator, radiator, and associated tubing components was used as an example in this study. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA: Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2018 en_US
dc.title Working Fluid Trade Study for a Two-Phase Mechanically Pumped Loop Thermal Control System en_US
dc.type Preprint en_US

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