Overall, our study showed that supplying aircraft APUs with liquid hydrogen appears technologically feasible and, if suitable airports are chosen for early adoption, only moderate equipment and investment is required. Up to a certain penetration level, most airports will be able to rely on LH_2 from existing liquefaction capacity. Later, when new capacity is required, this can be shared with other applications and possibly even located on-site the airport. In addition to risks inherent to novel technologies, potential barriers rather relate to economic interests and strategies of the players. Synergies can be expected from sharing the infrastructure with other large-scale applications such as hydrogen fuelled ground support equipment, apron vehicles, as well as airport-bound vehicles.
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