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Evaluation of Interdependencies between the Hydrogen Supply System and the Electrical Supply System for Aircraft Conceptual Design
Publikationstyp
Conference Paper
Date Issued
2023-09
Sprache
English
Author(s)
Citation
72. Deutscher Luft- und Raumfahrtkongress (DLRK 2023)
Contribution to Conference
72. Deutscher Luft- und Raumfahrtkongress, DLRK 2023
Publisher DOI
During the development of the hydrogen storage and supply system for a hydrogen-powered concept aircraft, it is essential to account for interactions with other onboard systems due to hydrogens unique properties. Hydrogen is a relatively volatile gas and reaches its lower flammability limit at a concentration of 4 vol.-% in air. Concentration levels above 4 vol.-%, which may, for instance, be caused by leakage, can lead to potentially catastrophic events. This paper discusses potential interdependencies between the hydrogen supply system and other on-board systems by performing sensitivity studies focused on the pipe routing of the hydrogen supply system and the cable routing of the electric power supply system in smaller installation spaces, such as inside the wing. Additionally, design rules for on-board systems are derived based on the results of these sensitivity studies. Thus, it is recommended to route hydrogen pipes in the highest possible position within the installation space to maintain a minimum distance from the electrical cables. In case the minimum distance condition cannot be met, housing should be applied to the cable or the pipe. However, in the case of the electrical system, the study shows that adding cable housing in these areas does not significantly impact the total on-board systems mass, as the mass increase is approximately 1% for the considered concept aircraft. Nevertheless, these interdependencies must be considered during the conceptual design phase to evaluate criteria like safety, segregation, and the required installation space.
Funding(s)
Zero