FUEL CELLS ON THE NASA SPACE SHUTTLE ORBITER .... When the reactants enter the fuel cells, they flow through a pre-heater that raise their temperature to a minimum of 4.50 C from cryogenic temperature levels. .... (3594 14 )
ALTERNATIVE FUEL SOURCES .... When the reactants enter the fuel cells, they flow through a pre-heater that raise their temperature to a minimum of 4.50 C from cryogenic temperature levels. .... (4160 17 )
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