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NASA-LLIS-4058

Lessons Learned - Use of Propellant Grade Commodities for Fuel Cell Powerplants

contributor authorNASA - National Aeronautics and Space Administration (NASA)
date accessioned2017-09-04T15:13:32Z
date available2017-09-04T15:13:32Z
date copyright07/22/2011
date issued2011
identifier otherMAQDNEAAAAAAAAAA.pdf
identifier urihttps://yse.yabesh.ir/std/handle/yse/12256
description abstractAbstract:
Space Shuttle Alkaline Fuel Cell Powerplants (FCPs) use O2 and H2 as reactants. These FCPs require higher grade LH2 and LO2 (99.99% and 99.989% purity levels, respectively) than Space Shuttle Main Engines (99.9% LH2 and 99.2% LO2). Proton Exchange Membrane (PEM) FCPs have been developed that can use propellant grade reactants. This means that a common liquid oxygen and liquid hydrogen system could potentially be designed for both propulsion and electrical power generation requirements as well as for Environmental Control and Life Support System (ECLSS). This would simplify cryogenic loading operations by getting rid of extra pad clears and load operations for the FCP Power Reactant Storage and Distribution (PRSD) system and potentially consolidating into one "cryo load." In addition, if propellant grade reactants were used for Lunar or Mars surface lander FCPs, the FCPs could scavenge the residual propellants for use in the FCP (assuming that any pressurant such as Helium could be removed from the propellant tanks.
languageEnglish
titleNASA-LLIS-4058num
titleLessons Learned - Use of Propellant Grade Commodities for Fuel Cell Powerplantsen
typestandard
page4
statusActive
treeNASA - National Aeronautics and Space Administration (NASA):;2011
contenttypefulltext
subject keywordsCrew Operations
subject keywordsCrew operations and support concepts
subject keywordsCrew Survival Systems
subject keywordsCryogenic Systems
subject keywordsEnergy
subject keywordsEngineering design and project processes and standards
subject keywordsEnvironmental Control and Life Support Systems
subject keywordsLander Systems
subject keywordsLevel II/III requirements definition
subject keywordsLong term sustainability and maintenance planning
subject keywordsLunar Operations
subject keywordsMission and systems trade studies
subject keywordsMission concepts and life-cycle planning
subject keywordsOrbiting Vehicles
subject keywordsPlanetary entry and landing concepts
subject keywordsPlanetary Operations
subject keywordsPower
subject keywordsPressure Vessels
subject keywordsPropulsion
subject keywordsResearch & Development
subject keywordsSpacecraft
subject keywordsSpacecraft and Spacecraft Instruments
subject keywordsVehicle concepts


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