Statistics – Applications
Scientific paper
Jan 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002iaf..confe.762g&link_type=abstract
IAF abstracts, 34th COSPAR Scientific Assembly, The Second World Space Congress, held 10-19 October, 2002 in Houston, TX, USA.,
Statistics
Applications
Scientific paper
In the frame of the power source activity at CNES. a statement of fuel cell technology for terrestrial application has been performed followed by a survey of reseach and technology actions necessary for space applications. In the last years a lot of different research and development actions have been performed on fuel cells for terrestrial particulaly for vehicles in the frame of an antipollution policy.The main results obtained concern : - solid polymer fuel cell technology using hydrogen ( high pressure stored or obtained by methanol - cost reduction with a future mass production as target (subtantial results have been obtained on - easy utilization - hydrogen production and storage ( source of hydrogen being mainly brought by methanol an overview is given mainly on technologies which present a certain interrest for space In the field of terrestrial reseach and development actions, proton conductive solid polymer technology fuel cell is perfectlly re-usable for space applications ,particularly : - new polymer membranes ( high conductive protonic conductivity, additives permitting to preserve - catalysts ( Pt nanoparticles technology,transition metal additives for increasing electrode - initial humification of reactant gases - gas management - stack technology in terms of, materials,machining, assembly, electrical contacts - thermal management taking into account that the main requirements for space applications are : - operation under zero gravity ( this requirement concerns the fuel cell stack in which electrolyte - an attractive mass budget - reliability and safety Some space specificities nevertheless remain and lead to make some technical choices and to guide developments, these scopes are the following : - the use of pure hydrogen, and oxygen gases ( for evident advantageous mass budget) doe not need - conversion efficiency leading to an attractive energy density budget is preferrred than high power - water rejection from the fuel cell systems need particular solutions due to zero gravity ( this - reactant storage by cryogenic way looks actually the most adaped solution for space in terms of
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