Fuel vaporizer for a reformer type fuel cell system

摘要

Large thermal stresses are avoided and the fuel charge reduced in a vaporizer particularly suited for use in a reformer type fuel cell system and having a construction that includes alternating fuel/water flow path defining cells ( 68 ) and hot gas flow path cells ( 69 ) by providing heat transfer augmentation, such as a lanced and offset fin ( 120 ), only in that part of the gas flow path structure ( 69 ) adjacent the regions in the fuel/water flow path cells ( 68 ) where heating of the liquid fuel/water and vaporizing of the fuel/water where the mixture exists is a two phase material occurs and not in the area adjacent those parts of the fuel/water flow path structure ( 68 ) in which superheating of the vaporized fuel/water mixture is occurring.