NASA Technical Reports Server NTRS 20150001478: Atmospheric Processing Module for Mars Propellant ProductionReportar como inadecuado



 NASA Technical Reports Server NTRS 20150001478: Atmospheric Processing Module for Mars Propellant Production


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The multi-NASA center Mars Atmosphere and Regolith COllector-PrOcessor for Lander Operations MARCO POLO project was established to build and demonstrate a methaneoxygen propellant production system in a Mars analog environment. Work at the Kennedy Space Center KSC Applied Chemistry Laboratory is focused on the Atmospheric Processing Module APM. The purpose of the APM is to freeze carbon dioxide from a simulated Martian atmosphere containing the minor components nitrogen, argon, carbon monoxide, and water vapor at Martian pressures approx. 8 torr by using dual cryocoolers with alternating cycles of freezing and sublimation. The resulting pressurized COsub 2 is fed to a methanation subsystem where it is catalytically combined with hydrogen in a Sabatier reactor supplied by the Johnson Space Center JSC to make methane and water vapor. We first used a simplified once-through setup and later employed a Hsub 2COsub 2 recycling system to improve process efficiency. This presentation and paper will cover 1 the design and selection of major hardware items, such as the cryocoolers, pumps, tanks, chillers, and membrane separators, 2 the determination of the optimal cold head design and flow rates needed to meet the collection requirement of 88 g COsub 2 hr for 14 hr, 3 the testing of the COsub 2 freezer subsystem, and 4 the integration and testing of the two subsystems to verify the desired production rate of 31.7 g CHsub 4 hr and 71.3 g Hsub 2O hr along with verification of their purity. The resulting 2.22 kg of CHsub 2Osub 2 propellant per 14 hr day including Osub 2 from electrolysis of water recovered from regolith, which also supplies the Hsub 2 for methanation is of the scale needed for a Mars Sample Return mission. In addition, the significance of the project to NASAs new Mars exploration plans will be discussed.



Autor: NASA Technical Reports Server (NTRS)

Fuente: https://archive.org/







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