1 of 16 Feasibility and benefit assessments of hybrid hydrogen fuel cell and battery configurations on a regional turboprop aircraft Chrysoula Lydia Pastra 1 School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0150 Gokcin Cinar 2 Department of Aerospace Engineering, University of Michigan, Ann Arbor, Michigan 48109-2140 Dimitri N Mavris 3 School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0150 Abstract – This paper will be exploring different hybrid configurations and comparing their fuel burn benefits in an attempt to identify whether hybrid electric, hybrid with hydrogen fuel cells or a combination of the two will bring the aviation sector closer towards decarbonization. A notional turboprop regional aircraft based on the DeHaviland Dash 8 Q 400 was modeled using public domain data to create a baseline for present day. Then, technologies were infused to create a 2030 BIC vehicle, and finally, hybrid architectures were implemented to develop a hybrid 2030 BIC vehicle. An existing parallel hybrid electric architecture showed 10.3% fuel burn benefit compared to the baseline for a design mission of 1100 nmi. In this paper the polymer electrolyte membrane hydrogen fuel cell was infused for the same mission and the fuel burn benefits were calculated in addition to a combination of the PEMFC and the lithium-ion batteries for the same mission. Finally, seeing that the notional turboprop was based on the DASH 8 Q400, the typical mission fuel burn benefits were calculated for each of the configurations and were compared to the baseline. Nomenclature PEMFC = polymer electrolyte membrane fuel cells HFC = hydrogen fuel cells BIC = Best in Class SOA = State of the Art   2 = mass flow rate of hydrogen [kg/s]  = hydrogen higher heating value [mol/s]   = Power Required [kW]   = Energy Required [kWh] m = mass [kg] ρ = density [kg/m^3] η = efficiency   2   = Specific Energy [kWh/kg]     = Specific Power [kW/kg] A = Area 1 Graduate Research Assistance, School of Aerospace Engineering, Georgia Tech, AIAA member. 2 Assistant Professor, University of Michigan, School of Aerospace Engineering, AIAA member. 3 S.P. Langley Distinguished Regents Professor and Director of ASDL, School of Aerospace Engineering, Georgia Tech, AIAA Fellow Downloaded by GEORGIA INST OF TECHNOLOGY on November 14, 2022 | http://arc.aiaa.org | DOI: 10.2514/6.2022-3290 AIAA AVIATION 2022 Forum June 27-July 1, 2022, Chicago, IL & Virtual 10.2514/6.2022-3290 Copyright © 2022 by Chrysoula Lydia Pastra. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. AIAA AVIATION Forum