High temperature polymer electrolyte fuel cell systems for aircraft applications

Abstract

HTPEFC as a power source for propulsion in aviation is demonstrated with the flying platform Antares DLR H2, showing a number of advantages. Methanol is selected as a hydrogen carrier and a compact modular system layout with methanol steam reforming units upstream of the liquid-cooled HT-PEFC has been established. With an appropriate dimensioning of the fuel cell system, the flight endurance is expected to be between 25 and 50 h. Power peaks during takeoff, ground operation, or critical flight situations are planned to be optionally addressed by engaging a direct fuel cell battery hybrid. Challenges and further development are discussed.