NASA-LLIS-4058

NASA - National Aeronautics and Space Administration (NASA)

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

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NASA - National Aeronautics and Space Administration (NASA)

Year: 2011

Abstract: Abstract:
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.

URI: https://yse.yabesh.ir/std/handle/yse/12256

Subject: Crew Operations

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NASA - National Aeronautics and Space Administration (NASA)

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contributor author	NASA - National Aeronautics and Space Administration (NASA)
date accessioned	2017-09-04T15:13:32Z
date available	2017-09-04T15:13:32Z
date copyright	07/22/2011
date issued	2011
identifier other	MAQDNEAAAAAAAAAA.pdf
identifier uri	https://yse.yabesh.ir/std/handle/yse/12256
description abstract	Abstract: 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.
language	English
title	NASA-LLIS-4058	num
title	Lessons Learned - Use of Propellant Grade Commodities for Fuel Cell Powerplants	en
type	standard
page	4
status	Active
tree	NASA - National Aeronautics and Space Administration (NASA):;2011
contenttype	fulltext
subject keywords	Crew Operations
subject keywords	Crew operations and support concepts
subject keywords	Crew Survival Systems
subject keywords	Cryogenic Systems
subject keywords	Energy
subject keywords	Engineering design and project processes and standards
subject keywords	Environmental Control and Life Support Systems
subject keywords	Lander Systems
subject keywords	Level II/III requirements definition
subject keywords	Long term sustainability and maintenance planning
subject keywords	Lunar Operations
subject keywords	Mission and systems trade studies
subject keywords	Mission concepts and life-cycle planning
subject keywords	Orbiting Vehicles
subject keywords	Planetary entry and landing concepts
subject keywords	Planetary Operations
subject keywords	Power
subject keywords	Pressure Vessels
subject keywords	Propulsion
subject keywords	Research & Development
subject keywords	Spacecraft
subject keywords	Spacecraft and Spacecraft Instruments
subject keywords	Vehicle concepts