Details
| Original language | English |
|---|---|
| Pages (from-to) | 76-84 |
| Number of pages | 9 |
| Journal | International Journal of Gas Turbine, Propulsion and Power Systems |
| Volume | 15 |
| Issue number | 2 |
| Publication status | Published - May 2024 |
Abstract
In this paper, a hydrogen fuel cell-based propulsion system for regional and future mid-range aircraft is investigated. The main focus herein lies on the exploration of the operating range of the electric cathode gas supply system (ECS) of the fuel cell stack. Subsequently, resulting constraints that limit the design space of the entire propulsion system are shown. Investigations are carried out using the on-design thermodynamic cycle calculation module of the in-house software ASTOR (AircraftEngine Simulation for Transient Operation Research). It includes a fuel cell model which facilitates conservation of mass and energy along the cathode side of the fuel cell system, as well as the specific constraints of the fuel cell stack due to its operating conditions. The second objective of this study is to determine suitable design points for the cathode air supply system which will serve as the starting point for detailed design of turbo components. Optimum fuel cell operating conditions are identified throughout relevant operating points at constant stoichiometry. Furthermore, contradictory requirements of the air supply system in terms of compressor mass flow and pressure ratio are identified. Finally, the off-design performance is estimated in order to derive statements about the coverage of the operating range depending on the choice of the design point. The top-of-climb operating point may be chosen as the design point in order to cover most operating points. At the same time, high altitude operation with a constant-geometry system appears only feasible at unrealistically high stoichiometric ratios or with additional measures such as bleed valves downstream of the compressor.
ASJC Scopus subject areas
- Engineering(all)
- Mechanical Engineering
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In: International Journal of Gas Turbine, Propulsion and Power Systems, Vol. 15, No. 2, 05.2024, p. 76-84.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Towards design- and operating-point selection for fuel cell cathode air-supply systems in aviation
AU - Lück, Sebastian
AU - Göing, Jan
AU - Wittmann, Tim
AU - Mimic, Dajan
AU - Friedrichs, Jens
N1 - Publisher Copyright: Copyright ©2024 Sebastian Lück, Jan Göing, Tim Wittmann, Dajan Mimic and Jens Friedrichs.
PY - 2024/5
Y1 - 2024/5
N2 - In this paper, a hydrogen fuel cell-based propulsion system for regional and future mid-range aircraft is investigated. The main focus herein lies on the exploration of the operating range of the electric cathode gas supply system (ECS) of the fuel cell stack. Subsequently, resulting constraints that limit the design space of the entire propulsion system are shown. Investigations are carried out using the on-design thermodynamic cycle calculation module of the in-house software ASTOR (AircraftEngine Simulation for Transient Operation Research). It includes a fuel cell model which facilitates conservation of mass and energy along the cathode side of the fuel cell system, as well as the specific constraints of the fuel cell stack due to its operating conditions. The second objective of this study is to determine suitable design points for the cathode air supply system which will serve as the starting point for detailed design of turbo components. Optimum fuel cell operating conditions are identified throughout relevant operating points at constant stoichiometry. Furthermore, contradictory requirements of the air supply system in terms of compressor mass flow and pressure ratio are identified. Finally, the off-design performance is estimated in order to derive statements about the coverage of the operating range depending on the choice of the design point. The top-of-climb operating point may be chosen as the design point in order to cover most operating points. At the same time, high altitude operation with a constant-geometry system appears only feasible at unrealistically high stoichiometric ratios or with additional measures such as bleed valves downstream of the compressor.
AB - In this paper, a hydrogen fuel cell-based propulsion system for regional and future mid-range aircraft is investigated. The main focus herein lies on the exploration of the operating range of the electric cathode gas supply system (ECS) of the fuel cell stack. Subsequently, resulting constraints that limit the design space of the entire propulsion system are shown. Investigations are carried out using the on-design thermodynamic cycle calculation module of the in-house software ASTOR (AircraftEngine Simulation for Transient Operation Research). It includes a fuel cell model which facilitates conservation of mass and energy along the cathode side of the fuel cell system, as well as the specific constraints of the fuel cell stack due to its operating conditions. The second objective of this study is to determine suitable design points for the cathode air supply system which will serve as the starting point for detailed design of turbo components. Optimum fuel cell operating conditions are identified throughout relevant operating points at constant stoichiometry. Furthermore, contradictory requirements of the air supply system in terms of compressor mass flow and pressure ratio are identified. Finally, the off-design performance is estimated in order to derive statements about the coverage of the operating range depending on the choice of the design point. The top-of-climb operating point may be chosen as the design point in order to cover most operating points. At the same time, high altitude operation with a constant-geometry system appears only feasible at unrealistically high stoichiometric ratios or with additional measures such as bleed valves downstream of the compressor.
UR - http://www.scopus.com/inward/record.url?scp=85196801659&partnerID=8YFLogxK
U2 - 10.38036/jgpp.15.2_76
DO - 10.38036/jgpp.15.2_76
M3 - Article
AN - SCOPUS:85196801659
VL - 15
SP - 76
EP - 84
JO - International Journal of Gas Turbine, Propulsion and Power Systems
JF - International Journal of Gas Turbine, Propulsion and Power Systems
IS - 2
ER -